landscape.h

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifndef LANDSCAPE_H
00013 #define LANDSCAPE_H
00014 
00015 #include "core/geometry_type.hpp"
00016 #include "tile_cmd.h"
00017 #include "slope_type.h"
00018 #include "direction_type.h"
00019 
00020 enum {
00021   SNOW_LINE_MONTHS = 12, 
00022   SNOW_LINE_DAYS   = 32, 
00023 };
00024 
00027 struct SnowLine {
00028   byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]; 
00029   byte highest_value; 
00030   byte lowest_value;  
00031 };
00032 
00033 bool IsSnowLineSet();
00034 void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]);
00035 byte GetSnowLine();
00036 byte HighestSnowLine();
00037 byte LowestSnowLine();
00038 void ClearSnowLine();
00039 
00040 uint GetPartialZ(int x, int y, Slope corners);
00041 uint GetSlopeZ(int x, int y);
00042 void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2);
00043 int GetSlopeZInCorner(Slope tileh, Corner corner);
00044 Slope GetFoundationSlope(TileIndex tile, uint *z);
00045 
00046 static inline Point RemapCoords(int x, int y, int z)
00047 {
00048   Point pt;
00049   pt.x = (y - x) * 2;
00050   pt.y = y + x - z;
00051   return pt;
00052 }
00053 
00054 static inline Point RemapCoords2(int x, int y)
00055 {
00056   return RemapCoords(x, y, GetSlopeZ(x, y));
00057 }
00058 
00059 uint ApplyFoundationToSlope(Foundation f, Slope *s);
00060 void DrawFoundation(TileInfo *ti, Foundation f);
00061 
00062 void DoClearSquare(TileIndex tile);
00063 void RunTileLoop();
00064 
00065 void InitializeLandscape();
00066 void GenerateLandscape(byte mode);
00067 
00068 #endif /* LANDSCAPE_H */

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