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annotate src/tgp.cpp @ 11436:caf4456fbbf3 draft

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(svn r15794) -Codechange: remove the DoDrawString part of the old text drawing API
author rubidium <rubidium@openttd.org>
date Sat, 21 Mar 2009 22:46:17 +0000
parents 10653704cdaa
children d1ed749a9ce5
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5584
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1 /* $Id$ */
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2
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3 /** @file tgp.cpp OTTD Perlin Noise Landscape Generator, aka TerraGenesis Perlin */
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4
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5 #include "stdafx.h"
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6 #include <math.h>
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7 #include "clear_map.h"
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8 #include "void_map.h"
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9 #include "genworld.h"
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10 #include "core/alloc_func.hpp"
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11 #include "core/random_func.hpp"
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12 #include "landscape_type.h"
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13 #include "settings_type.h"
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14
5584
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15 /*
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16 *
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17 * Quickie guide to Perlin Noise
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KUDr <KUDr@openttd.org>
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18 * Perlin noise is a predictable pseudo random number sequence. By generating
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19 * it in 2 dimensions, it becomes a useful random map, that for a given seed
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20 * and starting X & Y is entirely predictable. On the face of it, that may not
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KUDr <KUDr@openttd.org>
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21 * be useful. However, it means that if you want to replay a map in a different
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KUDr <KUDr@openttd.org>
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22 * terrain, or just vary the sea level, you just re-run the generator with the
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23 * same seed. The seed is an int32, and is randomised on each run of New Game.
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24 * The Scenario Generator does not randomise the value, so that you can
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KUDr <KUDr@openttd.org>
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25 * experiment with one terrain until you are happy, or click "Random" for a new
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26 * random seed.
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27 *
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28 * Perlin Noise is a series of "octaves" of random noise added together. By
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29 * reducing the amplitude of the noise with each octave, the first octave of
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30 * noise defines the main terrain sweep, the next the ripples on that, and the
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KUDr <KUDr@openttd.org>
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31 * next the ripples on that. I use 6 octaves, with the amplitude controlled by
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32 * a power ratio, usually known as a persistence or p value. This I vary by the
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33 * smoothness selection, as can be seen in the table below. The closer to 1,
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34 * the more of that octave is added. Each octave is however raised to the power
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35 * of its position in the list, so the last entry in the "smooth" row, 0.35, is
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36 * raised to the power of 6, so can only add 0.001838... of the amplitude to
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37 * the running total.
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38 *
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39 * In other words; the first p value sets the general shape of the terrain, the
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40 * second sets the major variations to that, ... until finally the smallest
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41 * bumps are added.
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42 *
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43 * Usefully, this routine is totally scaleable; so when 32bpp comes along, the
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KUDr <KUDr@openttd.org>
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44 * terrain can be as bumpy as you like! It is also infinitely expandable; a
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KUDr <KUDr@openttd.org>
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45 * single random seed terrain continues in X & Y as far as you care to
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46 * calculate. In theory, we could use just one seed value, but randomly select
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47 * where in the Perlin XY space we use for the terrain. Personally I prefer
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48 * using a simple (0, 0) to (X, Y), with a varying seed.
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49 *
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50 *
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51 * Other things i have had to do: mountainous wasnt mountainous enough, and
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52 * since we only have 0..15 heights available, I add a second generated map
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53 * (with a modified seed), onto the original. This generally raises the
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54 * terrain, which then needs scaling back down. Overall effect is a general
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55 * uplift.
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56 *
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57 * However, the values on the top of mountains are then almost guaranteed to go
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58 * too high, so large flat plateaus appeared at height 15. To counter this, I
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59 * scale all heights above 12 to proportion up to 15. It still makes the
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60 * mountains have flatish tops, rather than craggy peaks, but at least they
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61 * arent smooth as glass.
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62 *
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63 *
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64 * For a full discussion of Perlin Noise, please visit:
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65 * http://freespace.virgin.net/hugo.elias/models/m_perlin.htm
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66 *
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67 *
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68 * Evolution II
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69 *
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70 * The algorithm as described in the above link suggests to compute each tile height
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71 * as composition of several noise waves. Some of them are computed directly by
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72 * noise(x, y) function, some are calculated using linear approximation. Our
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73 * first implementation of perlin_noise_2D() used 4 noise(x, y) calls plus
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74 * 3 linear interpolations. It was called 6 times for each tile. This was a bit
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75 * CPU expensive.
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76 *
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77 * The following implementation uses optimized algorithm that should produce
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78 * the same quality result with much less computations, but more memory accesses.
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79 * The overal speedup should be 300% to 800% depending on CPU and memory speed.
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80 *
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81 * I will try to explain it on the example below:
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82 *
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83 * Have a map of 4 x 4 tiles, our simplifiead noise generator produces only two
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84 * values -1 and +1, use 3 octaves with wave lenght 1, 2 and 4, with amplitudes
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85 * 3, 2, 1. Original algorithm produces:
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86 *
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87 * h00 = lerp(lerp(-3, 3, 0/4), lerp(3, -3, 0/4), 0/4) + lerp(lerp(-2, 2, 0/2), lerp( 2, -2, 0/2), 0/2) + -1 = lerp(-3.0, 3.0, 0/4) + lerp(-2, 2, 0/2) + -1 = -3.0 + -2 + -1 = -6.0
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88 * h01 = lerp(lerp(-3, 3, 1/4), lerp(3, -3, 1/4), 0/4) + lerp(lerp(-2, 2, 1/2), lerp( 2, -2, 1/2), 0/2) + 1 = lerp(-1.5, 1.5, 0/4) + lerp( 0, 0, 0/2) + 1 = -1.5 + 0 + 1 = -0.5
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89 * h02 = lerp(lerp(-3, 3, 2/4), lerp(3, -3, 2/4), 0/4) + lerp(lerp( 2, -2, 0/2), lerp(-2, 2, 0/2), 0/2) + -1 = lerp( 0, 0, 0/4) + lerp( 2, -2, 0/2) + -1 = 0 + 2 + -1 = 1.0
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KUDr <KUDr@openttd.org>
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90 * h03 = lerp(lerp(-3, 3, 3/4), lerp(3, -3, 3/4), 0/4) + lerp(lerp( 2, -2, 1/2), lerp(-2, 2, 1/2), 0/2) + 1 = lerp( 1.5, -1.5, 0/4) + lerp( 0, 0, 0/2) + 1 = 1.5 + 0 + 1 = 2.5
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91 *
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92 * h10 = lerp(lerp(-3, 3, 0/4), lerp(3, -3, 0/4), 1/4) + lerp(lerp(-2, 2, 0/2), lerp( 2, -2, 0/2), 1/2) + 1 = lerp(-3.0, 3.0, 1/4) + lerp(-2, 2, 1/2) + 1 = -1.5 + 0 + 1 = -0.5
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93 * h11 = lerp(lerp(-3, 3, 1/4), lerp(3, -3, 1/4), 1/4) + lerp(lerp(-2, 2, 1/2), lerp( 2, -2, 1/2), 1/2) + -1 = lerp(-1.5, 1.5, 1/4) + lerp( 0, 0, 1/2) + -1 = -0.75 + 0 + -1 = -1.75
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94 * h12 = lerp(lerp(-3, 3, 2/4), lerp(3, -3, 2/4), 1/4) + lerp(lerp( 2, -2, 0/2), lerp(-2, 2, 0/2), 1/2) + 1 = lerp( 0, 0, 1/4) + lerp( 2, -2, 1/2) + 1 = 0 + 0 + 1 = 1.0
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95 * h13 = lerp(lerp(-3, 3, 3/4), lerp(3, -3, 3/4), 1/4) + lerp(lerp( 2, -2, 1/2), lerp(-2, 2, 1/2), 1/2) + -1 = lerp( 1.5, -1.5, 1/4) + lerp( 0, 0, 1/2) + -1 = 0.75 + 0 + -1 = -0.25
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96 *
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97 *
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98 * Optimization 1:
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99 *
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100 * 1) we need to allocate a bit more tiles: (size_x + 1) * (size_y + 1) = (5 * 5):
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101 *
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102 * 2) setup corner values using amplitude 3
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103 * { -3.0 X X X 3.0 }
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104 * { X X X X X }
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105 * { X X X X X }
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106 * { X X X X X }
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107 * { 3.0 X X X -3.0 }
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108 *
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109 * 3a) interpolate values in the middle
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110 * { -3.0 X 0.0 X 3.0 }
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111 * { X X X X X }
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112 * { 0.0 X 0.0 X 0.0 }
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113 * { X X X X X }
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114 * { 3.0 X 0.0 X -3.0 }
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115 *
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116 * 3b) add patches with amplitude 2 to them
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117 * { -5.0 X 2.0 X 1.0 }
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118 * { X X X X X }
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119 * { 2.0 X -2.0 X 2.0 }
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120 * { X X X X X }
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121 * { 1.0 X 2.0 X -5.0 }
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122 *
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123 * 4a) interpolate values in the middle
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124 * { -5.0 -1.5 2.0 1.5 1.0 }
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125 * { -1.5 -0.75 0.0 0.75 1.5 }
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126 * { 2.0 0.0 -2.0 0.0 2.0 }
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127 * { 1.5 0.75 0.0 -0.75 -1.5 }
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128 * { 1.0 1.5 2.0 -1.5 -5.0 }
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129 *
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130 * 4b) add patches with amplitude 1 to them
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131 * { -6.0 -0.5 1.0 2.5 0.0 }
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132 * { -0.5 -1.75 1.0 -0.25 2.5 }
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133 * { 1.0 1.0 -3.0 1.0 1.0 }
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134 * { 2.5 -0.25 1.0 -1.75 -0.5 }
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135 * { 0.0 2.5 1.0 -0.5 -6.0 }
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136 *
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137 *
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138 *
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139 * Optimization 2:
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140 *
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141 * As you can see above, each noise function was called just once. Therefore
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142 * we don't need to use noise function that calculates the noise from x, y and
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143 * some prime. The same quality result we can obtain using standard Random()
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144 * function instead.
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145 *
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146 */
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147
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148 #ifndef M_PI_2
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149 #define M_PI_2 1.57079632679489661923
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150 #define M_PI 3.14159265358979323846
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151 #endif /* M_PI_2 */
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152
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153 /** Fixed point type for heights */
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154 typedef int16 height_t;
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155 static const int height_decimal_bits = 4;
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156 static const height_t _invalid_height = -32768;
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157
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158 /** Fixed point array for amplitudes (and percent values) */
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159 typedef int amplitude_t;
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160 static const int amplitude_decimal_bits = 10;
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161
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162 /** Height map - allocated array of heights (MapSizeX() + 1) x (MapSizeY() + 1) */
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163 struct HeightMap
5584
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164 {
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165 height_t *h; //< array of heights
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166 uint dim_x; //< height map size_x MapSizeX() + 1
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167 uint total_size; //< height map total size
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168 uint size_x; //< MapSizeX()
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169 uint size_y; //< MapSizeY()
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170
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171 /**
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172 * Height map accessor
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173 * @param x X position
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174 * @param y Y position
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175 * @return height as fixed point number
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176 */
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177 inline height_t &height(uint x, uint y) {
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178 return h[x + y * dim_x];
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179 }
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180 };
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181
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182 /** Global height map instance */
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183 static HeightMap _height_map = {NULL, 0, 0, 0, 0};
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184
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185 /** Conversion: int to height_t */
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186 #define I2H(i) ((i) << height_decimal_bits)
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187 /** Conversion: height_t to int */
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188 #define H2I(i) ((i) >> height_decimal_bits)
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189
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190 /** Conversion: int to amplitude_t */
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191 #define I2A(i) ((i) << amplitude_decimal_bits)
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192 /** Conversion: amplitude_t to int */
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193 #define A2I(i) ((i) >> amplitude_decimal_bits)
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194
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195 /** Conversion: amplitude_t to height_t */
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196 #define A2H(a) ((a) >> (amplitude_decimal_bits - height_decimal_bits))
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197
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198
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199 /** Walk through all items of _height_map.h */
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200 #define FOR_ALL_TILES_IN_HEIGHT(h) for (h = _height_map.h; h < &_height_map.h[_height_map.total_size]; h++)
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201
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202 /** Maximum index into array of noise amplitudes */
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203 static const int TGP_FREQUENCY_MAX = 6;
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204
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205 /** Noise amplitudes (multiplied by 1024)
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206 * - indexed by "smoothness setting" and log2(frequency) */
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207 static const amplitude_t _amplitudes_by_smoothness_and_frequency[4][TGP_FREQUENCY_MAX + 1] = {
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208 /* lowest frequncy.... ...highest (every corner) */
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209 /* Very smooth */
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210 {16000, 5600, 1968, 688, 240, 16, 16},
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211 /* Smooth */
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212 {16000, 16000, 6448, 3200, 1024, 128, 16},
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213 /* Rough */
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214 {16000, 19200, 12800, 8000, 3200, 256, 64},
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215 /* Very Rough */
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216 {24000, 16000, 19200, 16000, 8000, 512, 320},
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217 };
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218
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219 /** Desired water percentage (100% == 1024) - indexed by _settings_game.difficulty.quantity_sea_lakes */
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220 static const amplitude_t _water_percent[4] = {20, 80, 250, 400};
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221
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222 /** Desired maximum height - indexed by _settings_game.difficulty.terrain_type */
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223 static const int8 _max_height[4] = {
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224 6, ///< Very flat
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225 9, ///< Flat
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226 12, ///< Hilly
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227 15 ///< Mountainous
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228 };
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229
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230 /** Check if a X/Y set are within the map.
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231 * @param x coordinate x
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232 * @param y coordinate y
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233 * @return true if within the map
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234 */
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235 static inline bool IsValidXY(uint x, uint y)
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236 {
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237 return ((int)x) >= 0 && x < _height_map.size_x && ((int)y) >= 0 && y < _height_map.size_y;
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238 }
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239
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240
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241 /**
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242 * Allocate array of (MapSizeX()+1)*(MapSizeY()+1) heights and init the _height_map structure members
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243 * @return true on success
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244 */
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245 static inline bool AllocHeightMap()
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246 {
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247 height_t *h;
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248
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249 _height_map.size_x = MapSizeX();
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250 _height_map.size_y = MapSizeY();
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251
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252 /* Allocate memory block for height map row pointers */
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253 _height_map.total_size = (_height_map.size_x + 1) * (_height_map.size_y + 1);
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254 _height_map.dim_x = _height_map.size_x + 1;
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255 _height_map.h = CallocT<height_t>(_height_map.total_size);
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256
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257 /* Iterate through height map initialize values */
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258 FOR_ALL_TILES_IN_HEIGHT(h) *h = _invalid_height;
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259
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260 return true;
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261 }
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262
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263 /** Free height map */
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264 static inline void FreeHeightMap()
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265 {
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266 if (_height_map.h == NULL) return;
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267 free(_height_map.h);
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268 _height_map.h = NULL;
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269 }
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270
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271 /**
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272 * Generates new random height in given amplitude (generated numbers will range from - amplitude to + amplitude)
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273 * @param rMax Limit of result
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274 * @return generated height
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275 */
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276 static inline height_t RandomHeight(amplitude_t rMax)
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277 {
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278 amplitude_t ra = (Random() << 16) | (Random() & 0x0000FFFF);
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279 height_t rh;
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280 /* Spread height into range -rMax..+rMax */
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281 rh = A2H(ra % (2 * rMax + 1) - rMax);
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282 return rh;
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283 }
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284
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285 /**
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286 * One interpolation and noise round
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287 *
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288 * The heights on the map are generated in an iterative process.
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289 * We start off with a frequency of 1 (log_frequency == 0), and generate heights only for corners on the most coarsly mesh
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290 * (i.e. only for x/y coordinates which are multiples of the minimum edge length).
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291 *
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292 * After this initial step the frequency is doubled (log_frequency incremented) each iteration to generate corners on the next finer mesh.
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293 * The heights of the newly added corners are first set by interpolating the heights from the previous iteration.
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294 * Finally noise with the given amplitude is applied to all corners of the new mesh.
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295 *
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296 * Generation terminates, when the frequency has reached the map size. I.e. the mesh is as fine as the map, and every corner height
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297 * has been set.
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298 *
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299 * @param log_frequency frequency (logarithmic) to apply noise for
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300 * @param amplitude Amplitude for the noise
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301 * @return false if we are finished (reached the minimal step size / highest frequency)
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302 */
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303 static bool ApplyNoise(uint log_frequency, amplitude_t amplitude)
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304 {
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305 uint size_min = min(_height_map.size_x, _height_map.size_y);
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306 uint step = size_min >> log_frequency;
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parents:
diff changeset
307 uint x, y;
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parents:
diff changeset
308
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frosch <frosch@openttd.org>
parents: 9606
diff changeset
309 /* Trying to apply noise to uninitialized height map */
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parents:
diff changeset
310 assert(_height_map.h != NULL);
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parents:
diff changeset
311
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KUDr <KUDr@openttd.org>
parents:
diff changeset
312 /* Are we finished? */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
313 if (step == 0) return false;
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parents:
diff changeset
314
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KUDr <KUDr@openttd.org>
parents:
diff changeset
315 if (log_frequency == 0) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
316 /* This is first round, we need to establish base heights with step = size_min */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
317 for (y = 0; y <= _height_map.size_y; y += step) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
318 for (x = 0; x <= _height_map.size_x; x += step) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
319 height_t height = (amplitude > 0) ? RandomHeight(amplitude) : 0;
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frosch <frosch@openttd.org>
parents: 9413
diff changeset
320 _height_map.height(x, y) = height;
5584
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parents:
diff changeset
321 }
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parents:
diff changeset
322 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
323 return true;
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parents:
diff changeset
324 }
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parents:
diff changeset
325
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KUDr <KUDr@openttd.org>
parents:
diff changeset
326 /* It is regular iteration round.
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KUDr <KUDr@openttd.org>
parents:
diff changeset
327 * Interpolate height values at odd x, even y tiles */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
328 for (y = 0; y <= _height_map.size_y; y += 2 * step) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
329 for (x = 0; x < _height_map.size_x; x += 2 * step) {
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frosch <frosch@openttd.org>
parents: 9413
diff changeset
330 height_t h00 = _height_map.height(x + 0 * step, y);
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
331 height_t h02 = _height_map.height(x + 2 * step, y);
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diff changeset
332 height_t h01 = (h00 + h02) / 2;
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frosch <frosch@openttd.org>
parents: 9413
diff changeset
333 _height_map.height(x + 1 * step, y) = h01;
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diff changeset
334 }
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parents:
diff changeset
335 }
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parents:
diff changeset
336
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KUDr <KUDr@openttd.org>
parents:
diff changeset
337 /* Interpolate height values at odd y tiles */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
338 for (y = 0; y < _height_map.size_y; y += 2 * step) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
339 for (x = 0; x <= _height_map.size_x; x += step) {
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
340 height_t h00 = _height_map.height(x, y + 0 * step);
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
341 height_t h20 = _height_map.height(x, y + 2 * step);
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
342 height_t h10 = (h00 + h20) / 2;
9603
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frosch <frosch@openttd.org>
parents: 9413
diff changeset
343 _height_map.height(x, y + 1 * step) = h10;
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
344 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
345 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
346
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frosch <frosch@openttd.org>
parents: 9606
diff changeset
347 /* Add noise for next higher frequency (smaller steps) */
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
348 for (y = 0; y <= _height_map.size_y; y += step) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
349 for (x = 0; x <= _height_map.size_x; x += step) {
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
350 _height_map.height(x, y) += RandomHeight(amplitude);
5584
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parents:
diff changeset
351 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
352 }
9613
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frosch <frosch@openttd.org>
parents: 9606
diff changeset
353
5584
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diff changeset
354 return (step > 1);
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KUDr <KUDr@openttd.org>
parents:
diff changeset
355 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
356
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KUDr <KUDr@openttd.org>
parents:
diff changeset
357 /** Base Perlin noise generator - fills height map with raw Perlin noise */
6247
57363e064324 (svn r9050) -Codechange: Foo(void) -> Foo()
rubidium <rubidium@openttd.org>
parents: 5609
diff changeset
358 static void HeightMapGenerate()
5584
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parents:
diff changeset
359 {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
360 uint size_min = min(_height_map.size_x, _height_map.size_y);
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KUDr <KUDr@openttd.org>
parents:
diff changeset
361 uint iteration_round = 0;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
362 amplitude_t amplitude;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
363 bool continue_iteration;
9615
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
364 int log_size_min, log_frequency_min;
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
365 int log_frequency;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
366
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frosch <frosch@openttd.org>
parents: 9613
diff changeset
367 /* Find first power of two that fits, so that later log_frequency == TGP_FREQUENCY_MAX in the last iteration */
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
368 for (log_size_min = TGP_FREQUENCY_MAX; (1U << log_size_min) < size_min; log_size_min++) { }
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
369 log_frequency_min = log_size_min - TGP_FREQUENCY_MAX;
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
370
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
371 /* Zero must be part of the iteration, else initialization will fail. */
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
372 assert(log_frequency_min >= 0);
5584
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diff changeset
373
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frosch <frosch@openttd.org>
parents: 9606
diff changeset
374 /* Keep increasing the frequency until we reach the step size equal to one tile */
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
375 do {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
376 log_frequency = iteration_round - log_frequency_min;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
377 if (log_frequency >= 0) {
9613
1fbe30ff6587 (svn r13667) -Documentation: Comment 'tgp.cpp' a bit. Based on patch by CommanderZ.
frosch <frosch@openttd.org>
parents: 9606
diff changeset
378 /* Apply noise for the next frequency */
9615
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
379 assert(log_frequency <= TGP_FREQUENCY_MAX);
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512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
380 amplitude = _amplitudes_by_smoothness_and_frequency[_settings_game.game_creation.tgen_smoothness][log_frequency];
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
381 } else {
9613
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frosch <frosch@openttd.org>
parents: 9606
diff changeset
382 /* Amplitude for the low frequencies on big maps is 0, i.e. initialise with zero height */
5584
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KUDr <KUDr@openttd.org>
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diff changeset
383 amplitude = 0;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
384 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
385 continue_iteration = ApplyNoise(iteration_round, amplitude);
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KUDr <KUDr@openttd.org>
parents:
diff changeset
386 iteration_round++;
9613
1fbe30ff6587 (svn r13667) -Documentation: Comment 'tgp.cpp' a bit. Based on patch by CommanderZ.
frosch <frosch@openttd.org>
parents: 9606
diff changeset
387 } while (continue_iteration);
9615
5657445ea7ee (svn r13671) -Cleanup: Zeros for sell.
frosch <frosch@openttd.org>
parents: 9613
diff changeset
388 assert(log_frequency == TGP_FREQUENCY_MAX);
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
389 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
390
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KUDr <KUDr@openttd.org>
parents:
diff changeset
391 /** Returns min, max and average height from height map */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
392 static void HeightMapGetMinMaxAvg(height_t *min_ptr, height_t *max_ptr, height_t *avg_ptr)
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KUDr <KUDr@openttd.org>
parents:
diff changeset
393 {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
394 height_t h_min, h_max, h_avg, *h;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
395 int64 h_accu = 0;
9603
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frosch <frosch@openttd.org>
parents: 9413
diff changeset
396 h_min = h_max = _height_map.height(0, 0);
5584
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KUDr <KUDr@openttd.org>
parents:
diff changeset
397
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KUDr <KUDr@openttd.org>
parents:
diff changeset
398 /* Get h_min, h_max and accumulate heights into h_accu */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
399 FOR_ALL_TILES_IN_HEIGHT(h) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
400 if (*h < h_min) h_min = *h;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
401 if (*h > h_max) h_max = *h;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
402 h_accu += *h;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
403 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
404
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
405 /* Get average height */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
406 h_avg = (height_t)(h_accu / (_height_map.size_x * _height_map.size_y));
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
407
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
408 /* Return required results */
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KUDr <KUDr@openttd.org>
parents:
diff changeset
409 if (min_ptr != NULL) *min_ptr = h_min;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
410 if (max_ptr != NULL) *max_ptr = h_max;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
411 if (avg_ptr != NULL) *avg_ptr = h_avg;
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KUDr <KUDr@openttd.org>
parents:
diff changeset
412 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
413
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
414 /** Dill histogram and return pointer to its base point - to the count of zero heights */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
415 static int *HeightMapMakeHistogram(height_t h_min, height_t h_max, int *hist_buf)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
416 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
417 int *hist = hist_buf - h_min;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
418 height_t *h;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
419
9613
1fbe30ff6587 (svn r13667) -Documentation: Comment 'tgp.cpp' a bit. Based on patch by CommanderZ.
frosch <frosch@openttd.org>
parents: 9606
diff changeset
420 /* Count the heights and fill the histogram */
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
421 FOR_ALL_TILES_IN_HEIGHT(h) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
422 assert(*h >= h_min);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
423 assert(*h <= h_max);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
424 hist[*h]++;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
425 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
426 return hist;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
427 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
428
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
429 /** Applies sine wave redistribution onto height map */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
430 static void HeightMapSineTransform(height_t h_min, height_t h_max)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
431 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
432 height_t *h;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
433
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
434 FOR_ALL_TILES_IN_HEIGHT(h) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
435 double fheight;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
436
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
437 if (*h < h_min) continue;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
438
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
439 /* Transform height into 0..1 space */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
440 fheight = (double)(*h - h_min) / (double)(h_max - h_min);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
441 /* Apply sine transform depending on landscape type */
9413
512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
442 switch(_settings_game.game_creation.landscape) {
6357
96b1652c6011 (svn r9400) -Codechange: Use some more representative enum names for landscape types.
belugas <belugas@openttd.org>
parents: 6248
diff changeset
443 case LT_TOYLAND:
96b1652c6011 (svn r9400) -Codechange: Use some more representative enum names for landscape types.
belugas <belugas@openttd.org>
parents: 6248
diff changeset
444 case LT_TEMPERATE:
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
445 /* Move and scale 0..1 into -1..+1 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
446 fheight = 2 * fheight - 1;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
447 /* Sine transform */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
448 fheight = sin(fheight * M_PI_2);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
449 /* Transform it back from -1..1 into 0..1 space */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
450 fheight = 0.5 * (fheight + 1);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
451 break;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
452
6357
96b1652c6011 (svn r9400) -Codechange: Use some more representative enum names for landscape types.
belugas <belugas@openttd.org>
parents: 6248
diff changeset
453 case LT_ARCTIC:
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
454 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
455 /* Arctic terrain needs special height distribution.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
456 * Redistribute heights to have more tiles at highest (75%..100%) range */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
457 double sine_upper_limit = 0.75;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
458 double linear_compression = 2;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
459 if (fheight >= sine_upper_limit) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
460 /* Over the limit we do linear compression up */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
461 fheight = 1.0 - (1.0 - fheight) / linear_compression;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
462 } else {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
463 double m = 1.0 - (1.0 - sine_upper_limit) / linear_compression;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
464 /* Get 0..sine_upper_limit into -1..1 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
465 fheight = 2.0 * fheight / sine_upper_limit - 1.0;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
466 /* Sine wave transform */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
467 fheight = sin(fheight * M_PI_2);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
468 /* Get -1..1 back to 0..(1 - (1 - sine_upper_limit) / linear_compression) == 0.0..m */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
469 fheight = 0.5 * (fheight + 1.0) * m;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
470 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
471 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
472 break;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
473
6357
96b1652c6011 (svn r9400) -Codechange: Use some more representative enum names for landscape types.
belugas <belugas@openttd.org>
parents: 6248
diff changeset
474 case LT_TROPIC:
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
475 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
476 /* Desert terrain needs special height distribution.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
477 * Half of tiles should be at lowest (0..25%) heights */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
478 double sine_lower_limit = 0.5;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
479 double linear_compression = 2;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
480 if (fheight <= sine_lower_limit) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
481 /* Under the limit we do linear compression down */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
482 fheight = fheight / linear_compression;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
483 } else {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
484 double m = sine_lower_limit / linear_compression;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
485 /* Get sine_lower_limit..1 into -1..1 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
486 fheight = 2.0 * ((fheight - sine_lower_limit) / (1.0 - sine_lower_limit)) - 1.0;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
487 /* Sine wave transform */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
488 fheight = sin(fheight * M_PI_2);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
489 /* Get -1..1 back to (sine_lower_limit / linear_compression)..1.0 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
490 fheight = 0.5 * ((1.0 - m) * fheight + (1.0 + m));
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
491 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
492 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
493 break;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
494
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
495 default:
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
496 NOT_REACHED();
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
497 break;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
498 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
499 /* Transform it back into h_min..h_max space */
5587
c44c070c5032 (svn r8038) -Merge: the cpp branch. Effort of KUDr, Celestar, glx, Smoovius, stillunknown and pv2b.
rubidium <rubidium@openttd.org>
parents: 5584
diff changeset
500 *h = (height_t)(fheight * (h_max - h_min) + h_min);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
501 if (*h < 0) *h = I2H(0);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
502 if (*h >= h_max) *h = h_max - 1;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
503 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
504 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
505
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
506 /** Adjusts heights in height map to contain required amount of water tiles */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
507 static void HeightMapAdjustWaterLevel(amplitude_t water_percent, height_t h_max_new)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
508 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
509 height_t h_min, h_max, h_avg, h_water_level;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
510 int water_tiles, desired_water_tiles;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
511 height_t *h;
5609
358c07fb3212 (svn r8066) - Codechange: MallocT(), CallocT(), ReallocT() now return the pointer to allocated memory instead of modifying the pointer given as parameter
KUDr <KUDr@openttd.org>
parents: 5601
diff changeset
512 int *hist;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
513
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
514 HeightMapGetMinMaxAvg(&h_min, &h_max, &h_avg);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
515
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
516 /* Allocate histogram buffer and clear its cells */
5609
358c07fb3212 (svn r8066) - Codechange: MallocT(), CallocT(), ReallocT() now return the pointer to allocated memory instead of modifying the pointer given as parameter
KUDr <KUDr@openttd.org>
parents: 5601
diff changeset
517 int *hist_buf = CallocT<int>(h_max - h_min + 1);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
518 /* Fill histogram */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
519 hist = HeightMapMakeHistogram(h_min, h_max, hist_buf);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
520
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
521 /* How many water tiles do we want? */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
522 desired_water_tiles = (int)(((int64)water_percent) * (int64)(_height_map.size_x * _height_map.size_y)) >> amplitude_decimal_bits;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
523
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
524 /* Raise water_level and accumulate values from histogram until we reach required number of water tiles */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
525 for (h_water_level = h_min, water_tiles = 0; h_water_level < h_max; h_water_level++) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
526 water_tiles += hist[h_water_level];
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
527 if (water_tiles >= desired_water_tiles) break;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
528 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
529
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
530 /* We now have the proper water level value.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
531 * Transform the height map into new (normalized) height map:
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
532 * values from range: h_min..h_water_level will become negative so it will be clamped to 0
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
533 * values from range: h_water_level..h_max are transformed into 0..h_max_new
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
534 * , where h_max_new is 4, 8, 12 or 16 depending on terrain type (very flat, flat, hilly, mountains)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
535 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
536 FOR_ALL_TILES_IN_HEIGHT(h) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
537 /* Transform height from range h_water_level..h_max into 0..h_max_new range */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
538 *h = (height_t)(((int)h_max_new) * (*h - h_water_level) / (h_max - h_water_level)) + I2H(1);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
539 /* Make sure all values are in the proper range (0..h_max_new) */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
540 if (*h < 0) *h = I2H(0);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
541 if (*h >= h_max_new) *h = h_max_new - 1;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
542 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
543
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
544 free(hist_buf);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
545 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
546
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
547 static double perlin_coast_noise_2D(const double x, const double y, const double p, const int prime);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
548
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
549 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
550 * This routine sculpts in from the edge a random amount, again a Perlin
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
551 * sequence, to avoid the rigid flat-edge slopes that were present before. The
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
552 * Perlin noise map doesnt know where we are going to slice across, and so we
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
553 * often cut straight through high terrain. the smoothing routine makes it
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
554 * legal, gradually increasing up from the edge to the original terrain height.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
555 * By cutting parts of this away, it gives a far more irregular edge to the
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
556 * map-edge. Sometimes it works beautifully with the existing sea & lakes, and
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
557 * creates a very realistic coastline. Other times the variation is less, and
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
558 * the map-edge shows its cliff-like roots.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
559 *
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
560 * This routine may be extended to randomly sculpt the height of the terrain
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
561 * near the edge. This will have the coast edge at low level (1-3), rising in
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
562 * smoothed steps inland to about 15 tiles in. This should make it look as
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
563 * though the map has been built for the map size, rather than a slice through
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
564 * a larger map.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
565 *
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
566 * Please note that all the small numbers; 53, 101, 167, etc. are small primes
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
567 * to help give the perlin noise a bit more of a random feel.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
568 */
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
569 static void HeightMapCoastLines(uint8 water_borders)
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
570 {
9413
512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
571 int smallest_size = min(_settings_game.game_creation.map_x, _settings_game.game_creation.map_y);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
572 const int margin = 4;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
573 uint y, x;
5587
c44c070c5032 (svn r8038) -Merge: the cpp branch. Effort of KUDr, Celestar, glx, Smoovius, stillunknown and pv2b.
rubidium <rubidium@openttd.org>
parents: 5584
diff changeset
574 double max_x;
c44c070c5032 (svn r8038) -Merge: the cpp branch. Effort of KUDr, Celestar, glx, Smoovius, stillunknown and pv2b.
rubidium <rubidium@openttd.org>
parents: 5584
diff changeset
575 double max_y;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
576
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
577 /* Lower to sea level */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
578 for (y = 0; y <= _height_map.size_y; y++) {
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
579 if (HasBit(water_borders, BORDER_NE)) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
580 /* Top right */
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
581 max_x = abs((perlin_coast_noise_2D(_height_map.size_y - y, y, 0.9, 53) + 0.25) * 5 + (perlin_coast_noise_2D(y, y, 0.35, 179) + 1) * 12);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
582 max_x = max((smallest_size * smallest_size / 16) + max_x, (smallest_size * smallest_size / 16) + margin - max_x);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
583 if (smallest_size < 8 && max_x > 5) max_x /= 1.5;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
584 for (x = 0; x < max_x; x++) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
585 _height_map.height(x, y) = 0;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
586 }
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
587 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
588
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
589 if (HasBit(water_borders, BORDER_SW)) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
590 /* Bottom left */
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
591 max_x = abs((perlin_coast_noise_2D(_height_map.size_y - y, y, 0.85, 101) + 0.3) * 6 + (perlin_coast_noise_2D(y, y, 0.45, 67) + 0.75) * 8);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
592 max_x = max((smallest_size * smallest_size / 16) + max_x, (smallest_size * smallest_size / 16) + margin - max_x);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
593 if (smallest_size < 8 && max_x > 5) max_x /= 1.5;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
594 for (x = _height_map.size_x; x > (_height_map.size_x - 1 - max_x); x--) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
595 _height_map.height(x, y) = 0;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
596 }
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
597 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
598 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
599
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
600 /* Lower to sea level */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
601 for (x = 0; x <= _height_map.size_x; x++) {
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
602 if (HasBit(water_borders, BORDER_NW)) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
603 /* Top left */
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
604 max_y = abs((perlin_coast_noise_2D(x, _height_map.size_y / 2, 0.9, 167) + 0.4) * 5 + (perlin_coast_noise_2D(x, _height_map.size_y / 3, 0.4, 211) + 0.7) * 9);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
605 max_y = max((smallest_size * smallest_size / 16) + max_y, (smallest_size * smallest_size / 16) + margin - max_y);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
606 if (smallest_size < 8 && max_y > 5) max_y /= 1.5;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
607 for (y = 0; y < max_y; y++) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
608 _height_map.height(x, y) = 0;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
609 }
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
610 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
611
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
612 if (HasBit(water_borders, BORDER_SE)) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
613 /* Bottom right */
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
614 max_y = abs((perlin_coast_noise_2D(x, _height_map.size_y / 3, 0.85, 71) + 0.25) * 6 + (perlin_coast_noise_2D(x, _height_map.size_y / 3, 0.35, 193) + 0.75) * 12);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
615 max_y = max((smallest_size * smallest_size / 16) + max_y, (smallest_size * smallest_size / 16) + margin - max_y);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
616 if (smallest_size < 8 && max_y > 5) max_y /= 1.5;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
617 for (y = _height_map.size_y; y > (_height_map.size_y - 1 - max_y); y--) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
618 _height_map.height(x, y) = 0;
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
619 }
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
620 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
621 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
622 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
623
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
624 /** Start at given point, move in given direction, find and Smooth coast in that direction */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
625 static void HeightMapSmoothCoastInDirection(int org_x, int org_y, int dir_x, int dir_y)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
626 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
627 const int max_coast_dist_from_edge = 35;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
628 const int max_coast_Smooth_depth = 35;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
629
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
630 int x, y;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
631 int ed; // coast distance from edge
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
632 int depth;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
633
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
634 height_t h_prev = 16;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
635 height_t h;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
636
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
637 assert(IsValidXY(org_x, org_y));
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
638
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
639 /* Search for the coast (first non-water tile) */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
640 for (x = org_x, y = org_y, ed = 0; IsValidXY(x, y) && ed < max_coast_dist_from_edge; x += dir_x, y += dir_y, ed++) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
641 /* Coast found? */
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
642 if (_height_map.height(x, y) > 15) break;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
643
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
644 /* Coast found in the neighborhood? */
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
645 if (IsValidXY(x + dir_y, y + dir_x) && _height_map.height(x + dir_y, y + dir_x) > 0) break;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
646
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
647 /* Coast found in the neighborhood on the other side */
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
648 if (IsValidXY(x - dir_y, y - dir_x) && _height_map.height(x - dir_y, y - dir_x) > 0) break;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
649 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
650
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
651 /* Coast found or max_coast_dist_from_edge has been reached.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
652 * Soften the coast slope */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
653 for (depth = 0; IsValidXY(x, y) && depth <= max_coast_Smooth_depth; depth++, x += dir_x, y += dir_y) {
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
654 h = _height_map.height(x, y);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
655 h = min(h, h_prev + (4 + depth)); // coast softening formula
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
656 _height_map.height(x, y) = h;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
657 h_prev = h;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
658 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
659 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
660
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
661 /** Smooth coasts by modulating height of tiles close to map edges with cosine of distance from edge */
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
662 static void HeightMapSmoothCoasts(uint8 water_borders)
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
663 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
664 uint x, y;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
665 /* First Smooth NW and SE coasts (y close to 0 and y close to size_y) */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
666 for (x = 0; x < _height_map.size_x; x++) {
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
667 if (HasBit(water_borders, BORDER_NW)) HeightMapSmoothCoastInDirection(x, 0, 0, 1);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
668 if (HasBit(water_borders, BORDER_SE)) HeightMapSmoothCoastInDirection(x, _height_map.size_y - 1, 0, -1);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
669 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
670 /* First Smooth NE and SW coasts (x close to 0 and x close to size_x) */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
671 for (y = 0; y < _height_map.size_y; y++) {
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
672 if (HasBit(water_borders, BORDER_NE)) HeightMapSmoothCoastInDirection(0, y, 1, 0);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
673 if (HasBit(water_borders, BORDER_SW)) HeightMapSmoothCoastInDirection(_height_map.size_x - 1, y, -1, 0);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
674 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
675 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
676
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
677 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
678 * This routine provides the essential cleanup necessary before OTTD can
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
679 * display the terrain. When generated, the terrain heights can jump more than
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
680 * one level between tiles. This routine smooths out those differences so that
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
681 * the most it can change is one level. When OTTD can support cliffs, this
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
682 * routine may not be necessary.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
683 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
684 static void HeightMapSmoothSlopes(height_t dh_max)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
685 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
686 int x, y;
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
687 for (y = 0; y <= (int)_height_map.size_y; y++) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
688 for (x = 0; x <= (int)_height_map.size_x; x++) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
689 height_t h_max = min(_height_map.height(x > 0 ? x - 1 : x, y), _height_map.height(x, y > 0 ? y - 1 : y)) + dh_max;
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
690 if (_height_map.height(x, y) > h_max) _height_map.height(x, y) = h_max;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
691 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
692 }
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
693 for (y = _height_map.size_y; y >= 0; y--) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
694 for (x = _height_map.size_x; x >= 0; x--) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
695 height_t h_max = min(_height_map.height((uint)x < _height_map.size_x ? x + 1 : x, y), _height_map.height(x, (uint)y < _height_map.size_y ? y + 1 : y)) + dh_max;
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
696 if (_height_map.height(x, y) > h_max) _height_map.height(x, y) = h_max;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
697 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
698 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
699 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
700
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
701 /** Height map terraform post processing:
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
702 * - water level adjusting
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
703 * - coast Smoothing
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
704 * - slope Smoothing
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
705 * - height histogram redistribution by sine wave transform */
6247
57363e064324 (svn r9050) -Codechange: Foo(void) -> Foo()
rubidium <rubidium@openttd.org>
parents: 5609
diff changeset
706 static void HeightMapNormalize()
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
707 {
9413
512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
708 const amplitude_t water_percent = _water_percent[_settings_game.difficulty.quantity_sea_lakes];
512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
709 const height_t h_max_new = I2H(_max_height[_settings_game.difficulty.terrain_type]);
512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
710 const height_t roughness = 7 + 3 * _settings_game.game_creation.tgen_smoothness;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
711
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
712 HeightMapAdjustWaterLevel(water_percent, h_max_new);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
713
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
714 byte water_borders = _settings_game.construction.freeform_edges ? _settings_game.game_creation.water_borders : 0xF;
10877
e9c95718d466 (svn r15212) -Feature [FS#2566]: Change the dropdown box where you can chose which edges will be water to 4 pushbuttons (based on patch by planetmaker).
Yexo <Yexo@openttd.org>
parents: 10855
diff changeset
715 if (water_borders == BORDERS_RANDOM) water_borders = GB(Random(), 0, 4);
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
716
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
717 HeightMapCoastLines(water_borders);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
718 HeightMapSmoothSlopes(roughness);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
719
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
720 HeightMapSmoothCoasts(water_borders);
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
721 HeightMapSmoothSlopes(roughness);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
722
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
723 HeightMapSineTransform(12, h_max_new);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
724 HeightMapSmoothSlopes(16);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
725 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
726
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
727 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
728 * The Perlin Noise calculation using large primes
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
729 * The initial number is adjusted by two values; the generation_seed, and the
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
730 * passed parameter; prime.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
731 * prime is used to allow the perlin noise generator to create useful random
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
732 * numbers from slightly different series.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
733 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
734 static double int_noise(const long x, const long y, const int prime)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
735 {
9413
512ea64da840 (svn r13325) -Codechange: split the client-side only settings from the settings stored in the savegame so there is no need to have a duplicate copy of it for new games.
rubidium <rubidium@openttd.org>
parents: 9358
diff changeset
736 long n = x + y * prime + _settings_game.game_creation.generation_seed;
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
737
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
738 n = (n << 13) ^ n;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
739
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
740 /* Pseudo-random number generator, using several large primes */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
741 return 1.0 - (double)((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
742 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
743
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
744
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
745 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
746 * Hj. Malthaner's routine included 2 different noise smoothing methods.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
747 * We now use the "raw" int_noise one.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
748 * However, it may be useful to move to the other routine in future.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
749 * So it is included too.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
750 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
751 static double smoothed_noise(const int x, const int y, const int prime)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
752 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
753 #if 0
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
754 /* A hilly world (four corner smooth) */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
755 const double sides = int_noise(x - 1, y) + int_noise(x + 1, y) + int_noise(x, y - 1) + int_noise(x, y + 1);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
756 const double center = int_noise(x, y);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
757 return (sides + sides + center * 4) / 8.0;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
758 #endif
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
759
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
760 /* This gives very hilly world */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
761 return int_noise(x, y, prime);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
762 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
763
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
764
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
765 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
766 * This routine determines the interpolated value between a and b
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
767 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
768 static inline double linear_interpolate(const double a, const double b, const double x)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
769 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
770 return a + x * (b - a);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
771 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
772
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
773
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
774 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
775 * This routine returns the smoothed interpolated noise for an x and y, using
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
776 * the values from the surrounding positions.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
777 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
778 static double interpolated_noise(const double x, const double y, const int prime)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
779 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
780 const int integer_X = (int)x;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
781 const int integer_Y = (int)y;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
782
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
783 const double fractional_X = x - (double)integer_X;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
784 const double fractional_Y = y - (double)integer_Y;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
785
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
786 const double v1 = smoothed_noise(integer_X, integer_Y, prime);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
787 const double v2 = smoothed_noise(integer_X + 1, integer_Y, prime);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
788 const double v3 = smoothed_noise(integer_X, integer_Y + 1, prime);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
789 const double v4 = smoothed_noise(integer_X + 1, integer_Y + 1, prime);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
790
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
791 const double i1 = linear_interpolate(v1, v2, fractional_X);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
792 const double i2 = linear_interpolate(v3, v4, fractional_X);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
793
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
794 return linear_interpolate(i1, i2, fractional_Y);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
795 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
796
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
797
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
798 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
799 * This is a similar function to the main perlin noise calculation, but uses
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
800 * the value p passed as a parameter rather than selected from the predefined
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
801 * sequences. as you can guess by its title, i use this to create the indented
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
802 * coastline, which is just another perlin sequence.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
803 */
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
804 static double perlin_coast_noise_2D(const double x, const double y, const double p, const int prime)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
805 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
806 double total = 0.0;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
807 int i;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
808
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
809 for (i = 0; i < 6; i++) {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
810 const double frequency = (double)(1 << i);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
811 const double amplitude = pow(p, (double)i);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
812
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
813 total += interpolated_noise((x * frequency) / 64.0, (y * frequency) / 64.0, prime) * amplitude;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
814 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
815
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
816 return total;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
817 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
818
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
819
9613
1fbe30ff6587 (svn r13667) -Documentation: Comment 'tgp.cpp' a bit. Based on patch by CommanderZ.
frosch <frosch@openttd.org>
parents: 9606
diff changeset
820 /** A small helper function to initialize the terrain */
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
821 static void TgenSetTileHeight(TileIndex tile, int height)
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
822 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
823 SetTileHeight(tile, height);
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
824
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
825 /* Only clear the tiles within the map area. */
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
826 if (TileX(tile) != MapMaxX() && TileY(tile) != MapMaxY() &&
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
827 (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0))) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
828 MakeClear(tile, CLEAR_GRASS, 3);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
829 }
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
830 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
831
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
832 /**
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
833 * The main new land generator using Perlin noise. Desert landscape is handled
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
834 * different to all others to give a desert valley between two high mountains.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
835 * Clearly if a low height terrain (flat/very flat) is chosen, then the tropic
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
836 * areas wont be high enough, and there will be very little tropic on the map.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
837 * Thus Tropic works best on Hilly or Mountainous.
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
838 */
6247
57363e064324 (svn r9050) -Codechange: Foo(void) -> Foo()
rubidium <rubidium@openttd.org>
parents: 5609
diff changeset
839 void GenerateTerrainPerlin()
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
840 {
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
841 uint x, y;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
842
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
843 if (!AllocHeightMap()) return;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
844 GenerateWorldSetAbortCallback(FreeHeightMap);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
845
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
846 HeightMapGenerate();
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
847
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
848 IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
849
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
850 HeightMapNormalize();
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
851
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
852 IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
853
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
854 /* First make sure the tiles at the north border are void tiles if needed. */
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
855 if (_settings_game.construction.freeform_edges) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
856 for (y = 0; y < _height_map.size_y - 1; y++) MakeVoid(_height_map.size_x * y);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
857 for (x = 0; x < _height_map.size_x; x++) MakeVoid(x);
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
858 }
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
859
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
860 /* Transfer height map into OTTD map */
10855
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
861 for (y = 0; y < _height_map.size_y; y++) {
7881d9cd55ab (svn r15190) -Feature: Allow terraforming of the tiles at the edges of the map.
Yexo <Yexo@openttd.org>
parents: 10582
diff changeset
862 for (x = 0; x < _height_map.size_x; x++) {
9603
366b04ba8cb9 (svn r13645) -Codechange: Convert a macro into an inlined member function.
frosch <frosch@openttd.org>
parents: 9413
diff changeset
863 int height = H2I(_height_map.height(x, y));
5584
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
864 if (height < 0) height = 0;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
865 if (height > 15) height = 15;
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
866 TgenSetTileHeight(TileXY(x, y), height);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
867 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
868 }
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
869
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
870 IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
871
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
872 FreeHeightMap();
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
873 GenerateWorldSetAbortCallback(NULL);
4b26bd55bd24 (svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)
KUDr <KUDr@openttd.org>
parents:
diff changeset
874 }