autoslope.h

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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 AUTOSLOPE_H
#define AUTOSLOPE_H
 
#include "company_func.h"
#include "depot_func.h"
#include "tile_map.h"
 
inline bool AutoslopeCheckForEntranceEdge(TileIndex tile, int z_new, Slope tileh_new, DiagDirection entrance)
{
  if (GetTileMaxZ(tile) != z_new + GetSlopeMaxZ(tileh_new)) return false;
  return ((tileh_new == SLOPE_FLAT) || CanBuildDepotByTileh(entrance, tileh_new));
}
 
inline bool AutoslopeCheckForAxis(TileIndex tile, int z_new, Slope tileh_new, Axis axis)
{
  DiagDirection direction = AxisToDiagDir(axis);
  return AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction) &&
    AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction));
}
 
inline bool AutoslopeEnabled()
{
  return (_settings_game.construction.autoslope &&
          (_current_company < MAX_COMPANIES ||
           (_current_company == OWNER_NONE && _game_mode == GM_EDITOR)));
}
 
#endif /* AUTOSLOPE_H */