yapf_costbase.hpp

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/*
 * This file is part of OpenTTD.
 * 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.
 * 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.
 * 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/>.
 */
 
#ifndef YAPF_COSTBASE_HPP
#define YAPF_COSTBASE_HPP
 
struct CYapfCostBase {
  inline static bool stSlopeCost(TileIndex tile, Trackdir td)
  {
    if (IsDiagonalTrackdir(td)) {
      if (IsBridgeTile(tile)) {
        /* it is bridge ramp, check if we are entering the bridge */
        if (GetTunnelBridgeDirection(tile) != TrackdirToExitdir(td)) return false; // no, we are leaving it, no penalty
        /* we are entering the bridge */
        Slope tile_slope = GetTileSlope(tile);
        Axis axis = DiagDirToAxis(GetTunnelBridgeDirection(tile));
        return !HasBridgeFlatRamp(tile_slope, axis);
      } else {
        /* not bridge ramp */
        if (IsTunnelTile(tile)) return false; // tunnel entry/exit doesn't slope
        Slope tile_slope = GetTileSlope(tile);
        return IsUphillTrackdir(tile_slope, td); // slopes uphill => apply penalty
      }
    }
    return false;
  }
};
 
#endif /* YAPF_COSTBASE_HPP */