OpenTTD
bridge.h
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1 /* $Id: bridge.h 22413 2011-05-02 20:59:54Z rubidium $ */
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 BRIDGE_H
13 #define BRIDGE_H
14 
15 #include "gfx_type.h"
16 #include "tile_cmd.h"
17 
24  BRIDGE_PIECE_NORTH = 0,
25  BRIDGE_PIECE_SOUTH,
26  BRIDGE_PIECE_INNER_NORTH,
27  BRIDGE_PIECE_INNER_SOUTH,
28  BRIDGE_PIECE_MIDDLE_ODD,
29  BRIDGE_PIECE_MIDDLE_EVEN,
30  BRIDGE_PIECE_HEAD,
31  BRIDGE_PIECE_INVALID,
32 };
33 
35 
36 static const uint MAX_BRIDGES = 13;
37 
38 typedef uint BridgeType;
39 
43 struct BridgeSpec {
45  byte min_length;
46  uint16 max_length;
47  uint16 price;
48  uint16 speed;
52  StringID transport_name[2];
54  byte flags;
55 };
56 
58 
60 bool HasBridgeFlatRamp(Slope tileh, Axis axis);
61 
67 static inline const BridgeSpec *GetBridgeSpec(BridgeType i)
68 {
69  assert(i < lengthof(_bridge));
70  return &_bridge[i];
71 }
72 
73 void DrawBridgeMiddle(const TileInfo *ti);
74 
75 CommandCost CheckBridgeAvailability(BridgeType bridge_type, uint bridge_len, DoCommandFlag flags = DC_NONE);
76 int CalcBridgeLenCostFactor(int x);
77 
78 void ResetBridges();
79 
80 #endif /* BRIDGE_H */