pathfinder_func.h

Go to the documentation of this file.
00001 /* $Id: pathfinder_func.h 18809 2010-01-15 16:41:15Z 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 PATHFINDER_FUNC_H
00013 #define PATHFINDER_FUNC_H
00014 
00015 #include "../waypoint_base.h"
00016 
00026 static inline TileIndex CalcClosestStationTile(StationID station, TileIndex tile, StationType station_type)
00027 {
00028   const BaseStation *st = BaseStation::Get(station);
00029   TileArea ta;
00030   st->GetTileArea(&ta, station_type);
00031 
00032   /* If the rail station is (temporarily) not present, use the station sign to drive near the station */
00033   if (ta.tile == INVALID_TILE) return st->xy;
00034 
00035   uint minx = TileX(ta.tile);  // topmost corner of station
00036   uint miny = TileY(ta.tile);
00037   uint maxx = minx + ta.w - 1; // lowermost corner of station
00038   uint maxy = miny + ta.h - 1;
00039 
00040   /* we are going the aim for the x coordinate of the closest corner
00041    * but if we are between those coordinates, we will aim for our own x coordinate */
00042   uint x = ClampU(TileX(tile), minx, maxx);
00043 
00044   /* same for y coordinate, see above comment */
00045   uint y = ClampU(TileY(tile), miny, maxy);
00046 
00047   /* return the tile of our target coordinates */
00048   return TileXY(x, y);
00049 }
00050 
00051 #endif /* PATHFINDER_FUNC_H */

Generated on Fri Mar 4 21:37:03 2011 for OpenTTD by  doxygen 1.6.1