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annotate src/tile_map.h @ 8108:4faab45e2603 draft

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(svn r11669) -Codechange: refactor tile.h -> tile_type.h and tile_map.h
author rubidium <rubidium@openttd.org>
date Wed, 19 Dec 2007 23:26:02 +0000
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children c35412099303
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8108
4faab45e2603 (svn r11669) -Codechange: refactor tile.h -> tile_type.h and tile_map.h
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1 /* $Id$ */
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2
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3 /** @file tile_map.h Map writing/reading functions for tiles. */
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4
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5 #ifndef TILE_MAP_H
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6 #define TILE_MAP_H
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7
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8 #include "tile_type.h"
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9 #include "slope_type.h"
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10 #include "map.h"
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11
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12 /**
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13 * Returns the height of a tile
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14 *
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15 * This function returns the height of the northern corner of a tile.
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16 * This is saved in the global map-array. It does not take affect by
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17 * any slope-data of the tile.
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18 *
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19 * @param tile The tile to get the height from
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20 * @return the height of the tile
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21 * @pre tile < MapSize()
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22 */
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23 static inline uint TileHeight(TileIndex tile)
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24 {
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25 assert(tile < MapSize());
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26 return GB(_m[tile].type_height, 0, 4);
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27 }
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28
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29 /**
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30 * Sets the height of a tile.
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31 *
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32 * This function sets the height of the northern corner of a tile.
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33 *
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34 * @param tile The tile to change the height
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35 * @param height The new height value of the tile
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36 * @pre tile < MapSize()
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37 * @pre heigth <= MAX_TILE_HEIGHT
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38 */
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39 static inline void SetTileHeight(TileIndex tile, uint height)
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40 {
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41 assert(tile < MapSize());
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42 assert(height <= MAX_TILE_HEIGHT);
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43 SB(_m[tile].type_height, 0, 4, height);
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44 }
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45
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46 /**
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47 * Returns the height of a tile in pixels.
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48 *
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49 * This function returns the height of the northern corner of a tile in pixels.
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50 *
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51 * @param tile The tile to get the height
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52 * @return The height of the tile in pixel
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53 */
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54 static inline uint TilePixelHeight(TileIndex tile)
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55 {
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56 return TileHeight(tile) * TILE_HEIGHT;
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57 }
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58
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59 /**
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60 * Get the tiletype of a given tile.
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61 *
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62 * @param tile The tile to get the TileType
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63 * @return The tiletype of the tile
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64 * @pre tile < MapSize()
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65 */
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66 static inline TileType GetTileType(TileIndex tile)
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67 {
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68 assert(tile < MapSize());
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69 return (TileType)GB(_m[tile].type_height, 4, 4);
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70 }
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71
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72 /**
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73 * Set the type of a tile
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74 *
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75 * This functions sets the type of a tile. If the type
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76 * MP_VOID is selected the tile must be at the south-west or
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77 * south-east edges of the map and vice versa.
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78 *
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79 * @param tile The tile to save the new type
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80 * @param type The type to save
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81 * @pre tile < MapSize()
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82 * @pre type MP_VOID <=> tile is on the south-east or south-west edge.
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83 */
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84 static inline void SetTileType(TileIndex tile, TileType type)
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85 {
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86 assert(tile < MapSize());
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87 /* VOID tiles (and no others) are exactly allowed at the lower left and right
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88 * edges of the map */
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89 assert((TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) == (type == MP_VOID));
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90 SB(_m[tile].type_height, 4, 4, type);
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91 }
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92
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93 /**
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94 * Checks if a tile is a give tiletype.
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95 *
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96 * This function checks if a tile got the given tiletype.
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97 *
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98 * @param tile The tile to check
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99 * @param type The type to check agains
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100 * @return true If the type matches agains the type of the tile
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101 */
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102 static inline bool IsTileType(TileIndex tile, TileType type)
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103 {
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104 return GetTileType(tile) == type;
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105 }
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106
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107 /**
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108 * Returns the owner of a tile
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109 *
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110 * This function returns the owner of a tile. This cannot used
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111 * for tiles which type is one of MP_HOUSE, MP_VOID and MP_INDUSTRY
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112 * as no player owned any of these buildings.
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113 *
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114 * @param tile The tile to check
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115 * @return The owner of the tile
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116 * @pre tile < MapSize()
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117 * @pre The type of the tile must not be MP_HOUSE, MP_VOID and MP_INDUSTRY
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118 */
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119 static inline Owner GetTileOwner(TileIndex tile)
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120 {
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121 assert(tile < MapSize());
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122 assert(!IsTileType(tile, MP_HOUSE));
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123 assert(!IsTileType(tile, MP_VOID));
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124 assert(!IsTileType(tile, MP_INDUSTRY));
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125
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126 return (Owner)_m[tile].m1;
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127 }
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128
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129 /**
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130 * Sets the owner of a tile
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131 *
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132 * This function sets the owner status of a tile. Note that you cannot
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133 * set a owner for tiles of type MP_HOUSE, MP_VOID and MP_INDUSTRY.
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134 *
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135 * @param tile The tile to change the owner status.
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136 * @param owner The new owner.
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137 * @pre tile < MapSize()
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138 * @pre The type of the tile must not be MP_HOUSE, MP_VOID and MP_INDUSTRY
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139 */
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140 static inline void SetTileOwner(TileIndex tile, Owner owner)
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141 {
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142 assert(tile < MapSize());
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143 assert(!IsTileType(tile, MP_HOUSE));
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144 assert(!IsTileType(tile, MP_VOID));
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145 assert(!IsTileType(tile, MP_INDUSTRY));
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146
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147 _m[tile].m1 = owner;
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148 }
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149
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150 /**
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151 * Checks if a tile belongs to the given owner
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152 *
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153 * @param tile The tile to check
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154 * @param owner The owner to check agains
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155 * @return True if a tile belongs the the given owner
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156 */
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157 static inline bool IsTileOwner(TileIndex tile, Owner owner)
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158 {
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159 return GetTileOwner(tile) == owner;
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160 }
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161
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162 /**
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163 * Set the tropic zone
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164 * @param tile the tile to set the zone of
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165 * @param type the new type
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166 * @pre assert(tile < MapSize());
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167 */
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168 static inline void SetTropicZone(TileIndex tile, TropicZone type)
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169 {
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170 assert(tile < MapSize());
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171 SB(_m[tile].m6, 0, 2, type);
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172 }
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173
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174 /**
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175 * Get the tropic zone
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176 * @param tile the tile to get the zone of
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177 * @pre assert(tile < MapSize());
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178 * @return the zone type
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179 */
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180 static inline TropicZone GetTropicZone(TileIndex tile)
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181 {
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182 assert(tile < MapSize());
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183 return (TropicZone)GB(_m[tile].m6, 0, 2);
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184 }
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185
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186 Slope GetTileSlope(TileIndex tile, uint *h);
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187 uint GetTileZ(TileIndex tile);
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188 uint GetTileMaxZ(TileIndex tile);
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189
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190 #endif /* TILE_TYPE_H */