tilearea_type.h

Go to the documentation of this file.
00001 /* $Id: tilearea_type.h 21499 2010-12-13 15:13:05Z rubidium $ */
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 TILEAREA_TYPE_H
00013 #define TILEAREA_TYPE_H
00014 
00015 #include "map_func.h"
00016 
00018 struct TileArea {
00019   TileIndex tile; 
00020   uint16 w;       
00021   uint16 h;       
00022 
00024   TileArea() {}
00025 
00032   TileArea(TileIndex tile, uint8 w, uint8 h) : tile(tile), w(w), h(h) {}
00033 
00034   TileArea(TileIndex start, TileIndex end);
00035 
00036 
00037   void Add(TileIndex to_add);
00038 
00042   void Clear()
00043   {
00044     this->tile = INVALID_TILE;
00045     this->w    = 0;
00046     this->h    = 0;
00047   }
00048 
00049   bool Intersects(const TileArea &ta) const;
00050 
00051   void ClampToMap();
00052 
00057   TileIndex GetCenterTile() const
00058   {
00059     return TILE_ADDXY(this->tile, this->w / 2, this->h / 2);
00060   }
00061 };
00062 
00064 class TileIterator {
00065 protected:
00066   TileIndex tile; 
00067 
00072   TileIterator(TileIndex tile) : tile(tile)
00073   {
00074   }
00075 
00076 public:
00078   virtual ~TileIterator()
00079   {
00080   }
00081 
00086   FORCEINLINE operator TileIndex () const
00087   {
00088     return this->tile;
00089   }
00090 
00094   virtual TileIterator& operator ++() = 0;
00095 };
00096 
00098 class OrthogonalTileIterator : public TileIterator {
00099 private:
00100   int w;          
00101   int x;          
00102   int y;          
00103 
00104 public:
00109   OrthogonalTileIterator(const TileArea &ta) : TileIterator(ta.w == 0 || ta.h == 0 ? INVALID_TILE : ta.tile), w(ta.w), x(ta.w), y(ta.h)
00110   {
00111   }
00112 
00116   FORCEINLINE TileIterator& operator ++()
00117   {
00118     assert(this->tile != INVALID_TILE);
00119 
00120     if (--this->x > 0) {
00121       this->tile++;
00122     } else if (--this->y > 0) {
00123       this->x = this->w;
00124       this->tile += TileDiffXY(1, 1) - this->w;
00125     } else {
00126       this->tile = INVALID_TILE;
00127     }
00128     return *this;
00129   }
00130 };
00131 
00133 class DiagonalTileIterator : public TileIterator {
00134 private:
00135   uint base_x, base_y; 
00136   int a_cur, b_cur;    
00137   int a_max, b_max;    
00138 
00139 public:
00145   DiagonalTileIterator(TileIndex begin, TileIndex end);
00146 
00150   TileIterator& operator ++();
00151 };
00152 
00159 #define TILE_AREA_LOOP(var, ta) for (OrthogonalTileIterator var(ta); var != INVALID_TILE; ++var)
00160 
00161 #endif /* TILEAREA_TYPE_H */

Generated on Fri Dec 31 17:15:40 2010 for OpenTTD by  doxygen 1.6.1