maedhros@6343: /* $Id$ */
maedhros@6343: 
rubidium@9111: /** @file landscape.h Functions related to OTTD's landscape. */
maedhros@6343: 
maedhros@6453: #ifndef LANDSCAPE_H
maedhros@6453: #define LANDSCAPE_H
maedhros@6453: 
rubidium@8121: #include "core/geometry_type.hpp"
rubidium@8138: #include "tile_cmd.h"
rubidium@8138: #include "slope_type.h"
rubidium@8138: #include "direction_type.h"
rubidium@8119: 
maedhros@6343: enum {
maedhros@6343: 	SNOW_LINE_MONTHS = 12,
maedhros@6343: 	SNOW_LINE_DAYS   = 32,
maedhros@6343: };
maedhros@6343: 
maedhros@6343: struct SnowLine {
maedhros@6343: 	byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS];
maedhros@6343: 	byte highest_value;
maedhros@6343: };
maedhros@6343: 
maedhros@6343: bool IsSnowLineSet(void);
maedhros@6343: void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]);
maedhros@6343: byte GetSnowLine(void);
maedhros@6343: byte HighestSnowLine(void);
maedhros@6343: void ClearSnowLine(void);
maedhros@6453: 
maedhros@6453: uint GetPartialZ(int x, int y, Slope corners);
maedhros@6453: uint GetSlopeZ(int x, int y);
rubidium@7728: void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2);
rubidium@7770: int GetSlopeZInCorner(Slope tileh, Corner corner);
frosch@8380: Slope GetFoundationSlope(TileIndex tile, uint* z);
maedhros@6453: 
maedhros@6453: static inline Point RemapCoords(int x, int y, int z)
maedhros@6453: {
maedhros@6453: 	Point pt;
maedhros@6453: 	pt.x = (y - x) * 2;
maedhros@6453: 	pt.y = y + x - z;
maedhros@6453: 	return pt;
maedhros@6453: }
maedhros@6453: 
maedhros@6453: static inline Point RemapCoords2(int x, int y)
maedhros@6453: {
maedhros@6453: 	return RemapCoords(x, y, GetSlopeZ(x, y));
maedhros@6453: }
maedhros@6453: 
rubidium@7335: uint ApplyFoundationToSlope(Foundation f, Slope *s);
rubidium@7335: void DrawFoundation(TileInfo *ti, Foundation f);
maedhros@6453: 
maedhros@6453: void DoClearSquare(TileIndex tile);
maedhros@6453: void RunTileLoop();
maedhros@6453: 
maedhros@6453: void InitializeLandscape();
maedhros@6453: void GenerateLandscape(byte mode);
maedhros@6453: 
maedhros@6453: TileIndex AdjustTileCoordRandomly(TileIndex a, byte rng);
maedhros@6453: 
maedhros@6453: #endif /* LANDSCAPE_H */