mirror of https://github.com/OpenTTD/OpenTTD.git
45 lines
1.8 KiB
C++
45 lines
1.8 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file yapf_costbase.hpp Handling of cost determination. */
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#ifndef YAPF_COSTBASE_HPP
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#define YAPF_COSTBASE_HPP
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/** Base implementation for cost accounting. */
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struct CYapfCostBase {
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/**
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* Does the given track direction on the given tile yeild an uphill penalty?
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* @param tile The tile to check.
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* @param td The track direction to check.
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* @return True if there's a slope, otherwise false.
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*/
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FORCEINLINE static bool stSlopeCost(TileIndex tile, Trackdir td)
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{
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if (IsDiagonalTrackdir(td)) {
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if (IsBridgeTile(tile)) {
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/* it is bridge ramp, check if we are entering the bridge */
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if (GetTunnelBridgeDirection(tile) != TrackdirToExitdir(td)) return false; // no, we are leaving it, no penalty
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/* we are entering the bridge */
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Slope tile_slope = GetTilePixelSlope(tile, NULL);
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Axis axis = DiagDirToAxis(GetTunnelBridgeDirection(tile));
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return !HasBridgeFlatRamp(tile_slope, axis);
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} else {
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/* not bridge ramp */
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if (IsTunnelTile(tile)) return false; // tunnel entry/exit doesn't slope
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Slope tile_slope = GetTilePixelSlope(tile, NULL);
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return IsUphillTrackdir(tile_slope, td); // slopes uphill => apply penalty
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}
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}
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return false;
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}
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};
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#endif /* YAPF_COSTBASE_HPP */
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