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(svn r25643) -Fix (r25480): [OSX] Define version constants before they're used
author planetmaker <planetmaker@openttd.org>
date Wed, 31 Jul 2013 18:50:01 +0000
parents 0dba7f49118c
children
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1 /* $Id$ */
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2
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3 /*
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4 * This file is part of OpenTTD.
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5 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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6 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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7 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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8 */
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9
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10 /** @file tile_map.h Map writing/reading functions for tiles. */
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11
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12 #ifndef TILE_MAP_H
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13 #define TILE_MAP_H
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14
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15 #include "slope_type.h"
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16 #include "map_func.h"
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17 #include "core/bitmath_func.hpp"
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18 #include "settings_type.h"
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19
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20 /**
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21 * Returns the height of a tile
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22 *
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23 * This function returns the height of the northern corner of a tile.
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24 * This is saved in the global map-array. It does not take affect by
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25 * any slope-data of the tile.
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26 *
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27 * @param tile The tile to get the height from
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28 * @return the height of the tile
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29 * @pre tile < MapSize()
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30 */
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31 static inline uint TileHeight(TileIndex tile)
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32 {
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33 assert(tile < MapSize());
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34 return GB(_m[tile].type_height, 0, 4);
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35 }
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36
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37 /**
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38 * Sets the height of a tile.
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39 *
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40 * This function sets the height of the northern corner of a tile.
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41 *
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42 * @param tile The tile to change the height
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43 * @param height The new height value of the tile
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44 * @pre tile < MapSize()
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45 * @pre heigth <= MAX_TILE_HEIGHT
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46 */
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47 static inline void SetTileHeight(TileIndex tile, uint height)
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48 {
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49 assert(tile < MapSize());
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50 assert(height <= MAX_TILE_HEIGHT);
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51 SB(_m[tile].type_height, 0, 4, height);
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52 }
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53
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54 /**
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55 * Returns the height of a tile in pixels.
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56 *
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57 * This function returns the height of the northern corner of a tile in pixels.
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58 *
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59 * @param tile The tile to get the height
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60 * @return The height of the tile in pixel
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61 */
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62 static inline uint TilePixelHeight(TileIndex tile)
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63 {
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64 return TileHeight(tile) * TILE_HEIGHT;
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65 }
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66
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67 /**
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68 * Get the tiletype of a given tile.
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69 *
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70 * @param tile The tile to get the TileType
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71 * @return The tiletype of the tile
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72 * @pre tile < MapSize()
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73 */
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74 static inline TileType GetTileType(TileIndex tile)
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75 {
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76 assert(tile < MapSize());
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77 return (TileType)GB(_m[tile].type_height, 4, 4);
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78 }
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79
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80 /**
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81 * Set the type of a tile
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82 *
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83 * This functions sets the type of a tile. If the type
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84 * MP_VOID is selected the tile must be at the south-west or
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85 * south-east edges of the map and vice versa.
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86 *
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87 * @param tile The tile to save the new type
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88 * @param type The type to save
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89 * @pre tile < MapSize()
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90 * @pre type MP_VOID <=> tile is on the south-east or south-west edge.
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91 */
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92 static inline void SetTileType(TileIndex tile, TileType type)
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93 {
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94 assert(tile < MapSize());
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95 /* VOID tiles (and no others) are exactly allowed at the lower left and right
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96 * edges of the map. If _settings_game.construction.freeform_edges is true,
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97 * the upper edges of the map are also VOID tiles. */
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98 assert((TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY() || (_settings_game.construction.freeform_edges && (TileX(tile) == 0 || TileY(tile) == 0))) == (type == MP_VOID));
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99 SB(_m[tile].type_height, 4, 4, type);
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100 }
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101
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102 /**
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103 * Checks if a tile is a give tiletype.
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104 *
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105 * This function checks if a tile got the given tiletype.
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106 *
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107 * @param tile The tile to check
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108 * @param type The type to check against
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109 * @return true If the type matches against the type of the tile
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110 */
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111 static inline bool IsTileType(TileIndex tile, TileType type)
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112 {
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113 return GetTileType(tile) == type;
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114 }
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115
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116 /**
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117 * Checks if a tile is valid
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118 *
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119 * @param tile The tile to check
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120 * @return True if the tile is on the map and not one of MP_VOID.
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121 */
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122 static inline bool IsValidTile(TileIndex tile)
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123 {
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124 return tile < MapSize() && !IsTileType(tile, MP_VOID);
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125 }
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126
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127 /**
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128 * Returns the owner of a tile
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129 *
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130 * This function returns the owner of a tile. This cannot used
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131 * for tiles which type is one of MP_HOUSE, MP_VOID and MP_INDUSTRY
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132 * as no company owned any of these buildings.
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133 *
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134 * @param tile The tile to check
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135 * @return The owner of the tile
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136 * @pre IsValidTile(tile)
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137 * @pre The type of the tile must not be MP_HOUSE and MP_INDUSTRY
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138 */
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139 static inline Owner GetTileOwner(TileIndex tile)
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140 {
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141 assert(IsValidTile(tile));
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142 assert(!IsTileType(tile, MP_HOUSE));
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143 assert(!IsTileType(tile, MP_INDUSTRY));
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144
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145 return (Owner)GB(_m[tile].m1, 0, 5);
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146 }
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147
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148 /**
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149 * Sets the owner of a tile
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150 *
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151 * This function sets the owner status of a tile. Note that you cannot
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152 * set a owner for tiles of type MP_HOUSE, MP_VOID and MP_INDUSTRY.
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153 *
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154 * @param tile The tile to change the owner status.
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155 * @param owner The new owner.
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156 * @pre IsValidTile(tile)
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157 * @pre The type of the tile must not be MP_HOUSE and MP_INDUSTRY
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158 */
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159 static inline void SetTileOwner(TileIndex tile, Owner owner)
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160 {
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161 assert(IsValidTile(tile));
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162 assert(!IsTileType(tile, MP_HOUSE));
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163 assert(!IsTileType(tile, MP_INDUSTRY));
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164
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165 SB(_m[tile].m1, 0, 5, owner);
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166 }
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167
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168 /**
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169 * Checks if a tile belongs to the given owner
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170 *
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171 * @param tile The tile to check
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172 * @param owner The owner to check against
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173 * @return True if a tile belongs the the given owner
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174 */
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175 static inline bool IsTileOwner(TileIndex tile, Owner owner)
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176 {
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177 return GetTileOwner(tile) == owner;
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178 }
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179
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180 /**
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181 * Set the tropic zone
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182 * @param tile the tile to set the zone of
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183 * @param type the new type
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184 * @pre tile < MapSize()
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185 */
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186 static inline void SetTropicZone(TileIndex tile, TropicZone type)
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187 {
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188 assert(tile < MapSize());
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189 assert(!IsTileType(tile, MP_VOID) || type == TROPICZONE_NORMAL);
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190 SB(_m[tile].m6, 0, 2, type);
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191 }
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192
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193 /**
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194 * Get the tropic zone
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195 * @param tile the tile to get the zone of
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196 * @pre tile < MapSize()
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197 * @return the zone type
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198 */
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199 static inline TropicZone GetTropicZone(TileIndex tile)
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200 {
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201 assert(tile < MapSize());
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202 return (TropicZone)GB(_m[tile].m6, 0, 2);
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203 }
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204
15934
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205 /**
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206 * Get the current animation frame
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207 * @param t the tile
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208 * @pre IsTileType(t, MP_HOUSE) || IsTileType(t, MP_OBJECT) || IsTileType(t, MP_INDUSTRY) ||IsTileType(t, MP_STATION)
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209 * @return frame number
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210 */
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211 static inline byte GetAnimationFrame(TileIndex t)
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212 {
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213 assert(IsTileType(t, MP_HOUSE) || IsTileType(t, MP_OBJECT) || IsTileType(t, MP_INDUSTRY) ||IsTileType(t, MP_STATION));
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214 return _me[t].m7;
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215 }
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216
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217 /**
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218 * Set a new animation frame
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219 * @param t the tile
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220 * @param frame the new frame number
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221 * @pre IsTileType(t, MP_HOUSE) || IsTileType(t, MP_OBJECT) || IsTileType(t, MP_INDUSTRY) ||IsTileType(t, MP_STATION)
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222 */
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223 static inline void SetAnimationFrame(TileIndex t, byte frame)
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224 {
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225 assert(IsTileType(t, MP_HOUSE) || IsTileType(t, MP_OBJECT) || IsTileType(t, MP_INDUSTRY) ||IsTileType(t, MP_STATION));
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226 _me[t].m7 = frame;
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227 }
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228
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229 Slope GetTileSlope(TileIndex tile, int *h = NULL);
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230 int GetTileZ(TileIndex tile);
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231 int GetTileMaxZ(TileIndex tile);
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232
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233 /**
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234 * Return the slope of a given tile
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235 * @param tile Tile to compute slope of
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236 * @param h If not \c NULL, pointer to storage of z height
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237 * @return Slope of the tile, except for the HALFTILE part
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238 */
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239 static inline Slope GetTilePixelSlope(TileIndex tile, int *h)
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240 {
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241 Slope s = GetTileSlope(tile, h);
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242 if (h != NULL) *h *= TILE_HEIGHT;
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243 return s;
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244 }
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245
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246 /**
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247 * Get bottom height of the tile
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248 * @param tile Tile to compute height of
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249 * @return Minimum height of the tile
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250 */
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251 static inline int GetTilePixelZ(TileIndex tile)
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252 {
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253 return GetTileZ(tile) * TILE_HEIGHT;
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254 }
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255
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256 /**
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257 * Get top height of the tile
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258 * @param t Tile to compute height of
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259 * @return Maximum height of the tile
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260 */
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261 static inline int GetTileMaxPixelZ(TileIndex tile)
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262 {
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263 return GetTileMaxZ(tile) * TILE_HEIGHT;
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264 }
8108
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265
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266
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267 /**
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268 * Calculate a hash value from a tile position
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269 *
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270 * @param x The X coordinate
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271 * @param y The Y coordinate
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272 * @return The hash of the tile
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273 */
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274 static inline uint TileHash(uint x, uint y)
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275 {
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276 uint hash = x >> 4;
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277 hash ^= x >> 6;
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278 hash ^= y >> 4;
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279 hash -= y >> 6;
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280 return hash;
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281 }
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282
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283 /**
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284 * Get the last two bits of the TileHash
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285 * from a tile position.
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286 *
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287 * @see TileHash()
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288 * @param x The X coordinate
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289 * @param y The Y coordinate
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290 * @return The last two bits from hash of the tile
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291 */
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292 static inline uint TileHash2Bit(uint x, uint y)
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293 {
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294 return GB(TileHash(x, y), 0, 2);
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295 }
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296
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297 #endif /* TILE_MAP_H */