author | miham |
Wed, 17 Aug 2005 12:30:07 +0000 | |
changeset 2349 | df02d0ffb588 |
parent 2186 | 461a2aff3486 |
child 2360 | 09e42e4ee139 |
permissions | -rw-r--r-- |
2186 | 1 |
/* $Id$ */ |
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#ifndef MAP_H |
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#define MAP_H |
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#include "stdafx.h" |
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// Putting externs inside inline functions seems to confuse the aliasing |
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// checking on MSVC6. Never use those variables directly. |
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extern uint _map_log_x; |
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extern uint _map_size_x; |
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extern uint _map_size_y; |
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extern uint _map_tile_mask; |
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extern uint _map_size; |
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#define TILE_MASK(x) ((x) & _map_tile_mask) |
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#define TILE_ASSERT(x) assert(TILE_MASK(x) == (x)); |
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#define RANDOM_TILE(r) TILE_MASK(r) |
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|
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typedef struct Tile { |
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byte type_height; |
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byte owner; |
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uint16 m2; |
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byte m3; |
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byte m4; |
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byte m5; |
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byte extra; |
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} Tile; |
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|
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extern Tile* _m; |
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void InitMap(uint log_x, uint log_y); |
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void AllocateMap(uint size_x, uint size_y); |
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// binary logarithm of the map size, try to avoid using this one |
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static inline uint MapLogX(void) { return _map_log_x; } |
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/* The size of the map */ |
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static inline uint MapSizeX(void) { return _map_size_x; } |
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static inline uint MapSizeY(void) { return _map_size_y; } |
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/* The maximum coordinates */ |
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static inline uint MapMaxX(void) { return _map_size_x - 1; } |
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static inline uint MapMaxY(void) { return _map_size_y - 1; } |
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/* The number of tiles in the map */ |
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static inline uint MapSize(void) { return _map_size; } |
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// Scale a number relative to the map size |
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uint ScaleByMapSize(uint); // Scale relative to the number of tiles |
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uint ScaleByMapSize1D(uint); // Scale relative to the circumference of the map |
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typedef uint32 TileIndex; |
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typedef int32 TileIndexDiff; |
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static inline TileIndex TileXY(uint x, uint y) |
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{ |
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return (y * MapSizeX()) + x; |
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} |
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static inline TileIndexDiff TileDiffXY(int x, int y) |
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{ |
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// Multiplication gives much better optimization on MSVC than shifting. |
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// 0 << shift isn't optimized to 0 properly. |
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// Typically x and y are constants, and then this doesn't result |
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// in any actual multiplication in the assembly code.. |
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return (y * MapSizeX()) + x; |
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} |
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|
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static inline TileIndex TileVirtXY(uint x, uint y) |
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{ |
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return (y >> 4 << MapLogX()) + (x >> 4); |
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} |
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typedef enum { |
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OWNER_TOWN = 0xf, // a town owns the tile |
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OWNER_NONE = 0x10, // nobody owns the tile |
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OWNER_WATER = 0x11, // "water" owns the tile |
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OWNER_SPECTATOR = 0xff, // spectator in MP or in scenario editor |
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} Owner; |
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enum { |
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INVALID_TILE = (TileIndex)-1 |
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}; |
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(svn r2448) General cleanup of rail related code, more to follow.
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enum { |
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TILE_SIZE = 16, /* Tiles are 16x16 "units" in size */ |
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TILE_PIXELS = 32, /* a tile is 32x32 pixels */ |
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TILE_HEIGHT = 8, /* The standard height-difference between tiles on two levels is 8 (z-diff 8) */ |
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}; |
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static inline uint TileX(TileIndex tile) |
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{ |
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return tile & MapMaxX(); |
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} |
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static inline uint TileY(TileIndex tile) |
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{ |
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return tile >> MapLogX(); |
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} |
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|
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typedef struct TileIndexDiffC { |
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int16 x; |
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int16 y; |
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} TileIndexDiffC; |
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|
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static inline TileIndexDiff ToTileIndexDiff(TileIndexDiffC tidc) |
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{ |
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return (tidc.y << MapLogX()) + tidc.x; |
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} |
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|
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|
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#ifndef _DEBUG |
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#define TILE_ADD(x,y) ((x) + (y)) |
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#else |
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extern TileIndex TileAdd(TileIndex tile, TileIndexDiff add, |
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const char *exp, const char *file, int line); |
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#define TILE_ADD(x, y) (TileAdd((x), (y), #x " + " #y, __FILE__, __LINE__)) |
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#endif |
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#define TILE_ADDXY(tile, x, y) TILE_ADD(tile, TileDiffXY(x, y)) |
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uint TileAddWrap(TileIndex tile, int addx, int addy); |
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static inline TileIndexDiffC TileIndexDiffCByDir(uint dir) { |
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extern const TileIndexDiffC _tileoffs_by_dir[4]; |
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return _tileoffs_by_dir[dir]; |
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} |
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/* Returns tile + the diff given in diff. If the result tile would end up |
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* outside of the map, INVALID_TILE is returned instead. |
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*/ |
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133 |
static inline TileIndex AddTileIndexDiffCWrap(TileIndex tile, TileIndexDiffC diff) { |
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int x = TileX(tile) + diff.x; |
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135 |
int y = TileY(tile) + diff.y; |
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136 |
if (x < 0 || y < 0 || x > (int)MapMaxX() || y > (int)MapMaxY()) |
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137 |
return INVALID_TILE; |
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138 |
else |
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1981 | 139 |
return TileXY(x, y); |
1247 | 140 |
} |
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// Functions to calculate distances |
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uint DistanceManhattan(TileIndex, TileIndex); // also known as L1-Norm. Is the shortest distance one could go over diagonal tracks (or roads) |
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uint DistanceSquare(TileIndex, TileIndex); // euclidian- or L2-Norm squared |
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uint DistanceMax(TileIndex, TileIndex); // also known as L-Infinity-Norm |
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uint DistanceMaxPlusManhattan(TileIndex, TileIndex); // Max + Manhattan |
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uint DistanceTrack(TileIndex, TileIndex); // Returns the shortest distance one could go over tracks |
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uint DistanceFromEdge(TileIndex); // shortest distance from any edge of the map |
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#define BEGIN_TILE_LOOP(var,w,h,tile) \ |
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{ \ |
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int h_cur = h; \ |
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uint var = tile; \ |
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do { \ |
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int w_cur = w; \ |
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do { |
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#define END_TILE_LOOP(var,w,h,tile) \ |
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} while (++var, --w_cur != 0); \ |
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} while (var += TileDiffXY(0, 1) - (w), --h_cur != 0); \ |
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} |
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static inline TileIndexDiff TileOffsByDir(uint dir) |
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{ |
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extern const TileIndexDiffC _tileoffs_by_dir[4]; |
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assert(dir < lengthof(_tileoffs_by_dir)); |
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return ToTileIndexDiff(_tileoffs_by_dir[dir]); |
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} |
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/* Approximation of the length of a straight track, relative to a diagonal |
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* track (ie the size of a tile side). #defined instead of const so it can |
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* stay integer. (no runtime float operations) Is this needed? |
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* Watch out! There are _no_ brackets around here, to prevent intermediate |
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* rounding! Be careful when using this! |
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* This value should be sqrt(2)/2 ~ 0.7071 */ |
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#define STRAIGHT_TRACK_LENGTH 7071/10000 |
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#endif |