maedhros@6669: /* $Id$ */
maedhros@6669: 
maedhros@6669: /** @file landscape.h */
maedhros@6669: 
maedhros@6949: #ifndef LANDSCAPE_H
maedhros@6949: #define LANDSCAPE_H
maedhros@6949: 
rubidium@8615: #include "gfx.h"
rubidium@8615: 
maedhros@6669: enum {
maedhros@6669: 	SNOW_LINE_MONTHS = 12,
maedhros@6669: 	SNOW_LINE_DAYS   = 32,
maedhros@6669: };
maedhros@6669: 
maedhros@6669: struct SnowLine {
maedhros@6669: 	byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS];
maedhros@6669: 	byte highest_value;
maedhros@6669: };
maedhros@6669: 
maedhros@6669: bool IsSnowLineSet(void);
maedhros@6669: void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]);
maedhros@6669: byte GetSnowLine(void);
maedhros@6669: byte HighestSnowLine(void);
maedhros@6669: void ClearSnowLine(void);
maedhros@6949: 
maedhros@6949: bool IsValidTile(TileIndex tile);
maedhros@6949: 
maedhros@6949: uint GetPartialZ(int x, int y, Slope corners);
maedhros@6949: uint GetSlopeZ(int x, int y);
rubidium@8224: void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2);
rubidium@8266: int GetSlopeZInCorner(Slope tileh, Corner corner);
maedhros@6949: 
maedhros@6949: static inline Point RemapCoords(int x, int y, int z)
maedhros@6949: {
maedhros@6949: 	Point pt;
maedhros@6949: 	pt.x = (y - x) * 2;
maedhros@6949: 	pt.y = y + x - z;
maedhros@6949: 	return pt;
maedhros@6949: }
maedhros@6949: 
maedhros@6949: static inline Point RemapCoords2(int x, int y)
maedhros@6949: {
maedhros@6949: 	return RemapCoords(x, y, GetSlopeZ(x, y));
maedhros@6949: }
maedhros@6949: 
rubidium@7831: uint ApplyFoundationToSlope(Foundation f, Slope *s);
rubidium@7831: void DrawFoundation(TileInfo *ti, Foundation f);
maedhros@6949: 
maedhros@6949: void DoClearSquare(TileIndex tile);
maedhros@6949: void RunTileLoop();
maedhros@6949: 
maedhros@6949: void InitializeLandscape();
maedhros@6949: void GenerateLandscape(byte mode);
maedhros@6949: 
maedhros@6949: void ConvertGroundTilesIntoWaterTiles();
maedhros@6949: 
maedhros@6949: TileIndex AdjustTileCoordRandomly(TileIndex a, byte rng);
maedhros@6949: 
maedhros@6949: #endif /* LANDSCAPE_H */