glx@9505: /* $Id$ */
glx@9505: 
rubidium@10455: /** @file landscape.h Functions related to OTTD's landscape. */
glx@9505: 
rubidium@9599: #ifndef LANDSCAPE_H
rubidium@9599: #define LANDSCAPE_H
rubidium@9599: 
rubidium@9723: #include "core/geometry_type.hpp"
rubidium@9723: #include "tile_cmd.h"
rubidium@9723: #include "slope_type.h"
rubidium@9723: #include "direction_type.h"
rubidium@9723: 
glx@9505: enum {
glx@9505: 	SNOW_LINE_MONTHS = 12,
glx@9505: 	SNOW_LINE_DAYS   = 32,
glx@9505: };
glx@9505: 
glx@9505: struct SnowLine {
glx@9505: 	byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS];
glx@9505: 	byte highest_value;
glx@9505: };
glx@9505: 
glx@9505: bool IsSnowLineSet(void);
glx@9505: void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]);
glx@9505: byte GetSnowLine(void);
glx@9505: byte HighestSnowLine(void);
glx@9505: void ClearSnowLine(void);
rubidium@9599: 
rubidium@9599: uint GetPartialZ(int x, int y, Slope corners);
rubidium@9599: uint GetSlopeZ(int x, int y);
truelight@9718: void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2);
rubidium@9722: int GetSlopeZInCorner(Slope tileh, Corner corner);
rubidium@9724: Slope GetFoundationSlope(TileIndex tile, uint* z);
rubidium@9599: 
rubidium@9599: static inline Point RemapCoords(int x, int y, int z)
rubidium@9599: {
rubidium@9599: 	Point pt;
rubidium@9599: 	pt.x = (y - x) * 2;
rubidium@9599: 	pt.y = y + x - z;
rubidium@9599: 	return pt;
rubidium@9599: }
rubidium@9599: 
rubidium@9599: static inline Point RemapCoords2(int x, int y)
rubidium@9599: {
rubidium@9599: 	return RemapCoords(x, y, GetSlopeZ(x, y));
rubidium@9599: }
rubidium@9599: 
rubidium@9694: uint ApplyFoundationToSlope(Foundation f, Slope *s);
rubidium@9694: void DrawFoundation(TileInfo *ti, Foundation f);
rubidium@9599: 
rubidium@9599: void DoClearSquare(TileIndex tile);
rubidium@9599: void RunTileLoop();
rubidium@9599: 
rubidium@9599: void InitializeLandscape();
rubidium@9599: void GenerateLandscape(byte mode);
rubidium@9599: 
rubidium@9599: TileIndex AdjustTileCoordRandomly(TileIndex a, byte rng);
rubidium@9599: 
rubidium@9599: #endif /* LANDSCAPE_H */