OpenTTD
yapf_costbase.hpp
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1 /* $Id: yapf_costbase.hpp 24900 2013-01-08 22:46:42Z planetmaker $ */
2 
3 /*
4  * This file is part of OpenTTD.
5  * 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.
6  * 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.
7  * 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/>.
8  */
9 
12 #ifndef YAPF_COSTBASE_HPP
13 #define YAPF_COSTBASE_HPP
14 
16 struct CYapfCostBase {
23  inline static bool stSlopeCost(TileIndex tile, Trackdir td)
24  {
25  if (IsDiagonalTrackdir(td)) {
26  if (IsBridgeTile(tile)) {
27  /* it is bridge ramp, check if we are entering the bridge */
28  if (GetTunnelBridgeDirection(tile) != TrackdirToExitdir(td)) return false; // no, we are leaving it, no penalty
29  /* we are entering the bridge */
30  Slope tile_slope = GetTileSlope(tile);
32  return !HasBridgeFlatRamp(tile_slope, axis);
33  } else {
34  /* not bridge ramp */
35  if (IsTunnelTile(tile)) return false; // tunnel entry/exit doesn't slope
36  Slope tile_slope = GetTileSlope(tile);
37  return IsUphillTrackdir(tile_slope, td); // slopes uphill => apply penalty
38  }
39  }
40  return false;
41  }
42 };
43 
44 #endif /* YAPF_COSTBASE_HPP */