bridge_map.cpp

Go to the documentation of this file.
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 #include "stdafx.h"
00013 #include "landscape.h"
00014 #include "tunnelbridge_map.h"
00015 
00016 
00022 static TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
00023 {
00024   TileIndexDiff delta = TileOffsByDiagDir(dir);
00025 
00026   dir = ReverseDiagDir(dir);
00027   do {
00028     tile += delta;
00029   } while (!IsBridgeTile(tile) || GetTunnelBridgeDirection(tile) != dir);
00030 
00031   return tile;
00032 }
00033 
00034 
00039 TileIndex GetNorthernBridgeEnd(TileIndex t)
00040 {
00041   return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
00042 }
00043 
00044 
00049 TileIndex GetSouthernBridgeEnd(TileIndex t)
00050 {
00051   return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
00052 }
00053 
00054 
00059 TileIndex GetOtherBridgeEnd(TileIndex tile)
00060 {
00061   assert(IsBridgeTile(tile));
00062   return GetBridgeEnd(tile, GetTunnelBridgeDirection(tile));
00063 }
00064 
00070 uint GetBridgeHeight(TileIndex t)
00071 {
00072   uint h;
00073   Slope tileh = GetTileSlope(t, &h);
00074   Foundation f = GetBridgeFoundation(tileh, DiagDirToAxis(GetTunnelBridgeDirection(t)));
00075 
00076   /* one height level extra for the ramp */
00077   return h + TILE_HEIGHT + ApplyFoundationToSlope(f, &tileh);
00078 }

Generated on Sun Jan 23 01:49:00 2011 for OpenTTD by  doxygen 1.6.1