bridge_type.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 BRIDGE_TYPE_H
#define BRIDGE_TYPE_H
 
#include "core/enum_type.hpp"
 
using BridgeType = uint; 
 
enum BridgePieces : uint8_t {
  BRIDGE_PIECE_NORTH = 0,
  BRIDGE_PIECE_SOUTH,
  BRIDGE_PIECE_INNER_NORTH,
  BRIDGE_PIECE_INNER_SOUTH,
  BRIDGE_PIECE_MIDDLE_ODD,
  BRIDGE_PIECE_MIDDLE_EVEN,
  BRIDGE_PIECE_HEAD,
  NUM_BRIDGE_PIECES,
};
 
DECLARE_INCREMENT_DECREMENT_OPERATORS(BridgePieces)
 
 
static constexpr uint NUM_BRIDGE_MIDDLE_PIECES = NUM_BRIDGE_PIECES - 1;
 
enum class BridgePillarFlag : uint8_t {
  /* Corners are in the same order as Corner enum. */
  CornerW = 0, 
  CornerS = 1, 
  CornerE = 2, 
  CornerN = 3, 
  /* Edges are in the same order as DiagDirection enum. */
  EdgeNE = 4, //< Northeast edge is obstructed.
  EdgeSE = 5, //< Southeast edge is obstructed.
  EdgeSW = 6, //< Southwest edge is obstructed.
  EdgeNW = 7, //< Northwest edge is obstructed.
};
using BridgePillarFlags = EnumBitSet<BridgePillarFlag, uint8_t>;
 
static constexpr BridgePillarFlags BRIDGEPILLARFLAGS_ALL{
  BridgePillarFlag::CornerW, BridgePillarFlag::CornerS, BridgePillarFlag::CornerE, BridgePillarFlag::CornerN,
  BridgePillarFlag::EdgeNE, BridgePillarFlag::EdgeSE, BridgePillarFlag::EdgeSW, BridgePillarFlag::EdgeNW,
};
 
struct BridgeableTileInfo {
  uint8_t height = 0; 
  BridgePillarFlags disallowed_pillars = BRIDGEPILLARFLAGS_ALL; 
};
 
#endif /* BRIDGE_TYPE_H */