# bridge_map.h

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    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * 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.
    00006  * 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.
    00007  * 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/>.
    00008  */
    00009
    00012 #ifndef BRIDGE_MAP_H
    00013 #define BRIDGE_MAP_H
    00014
    00015 #include "road_map.h"
    00016 #include "bridge.h"
    00017
    00024 static inline bool IsBridge(TileIndex t)
    00025 {
    00026   assert(IsTileType(t, MP_TUNNELBRIDGE));
    00027   return HasBit(_m[t].m5, 7);
    00028 }
    00029
    00035 static inline bool IsBridgeTile(TileIndex t)
    00036 {
    00037   return IsTileType(t, MP_TUNNELBRIDGE) && IsBridge(t);
    00038 }
    00039
    00046 static inline bool MayHaveBridgeAbove(TileIndex t)
    00047 {
    00048   return IsTileType(t, MP_CLEAR) || IsTileType(t, MP_RAILWAY) || IsTileType(t, MP_ROAD) ||
    00049       IsTileType(t, MP_WATER) || IsTileType(t, MP_TUNNELBRIDGE) || IsTileType(t, MP_OBJECT);
    00050 }
    00051
    00058 static inline bool IsBridgeAbove(TileIndex t)
    00059 {
    00060   assert(MayHaveBridgeAbove(t));
    00061   return GB(_m[t].m6, 6, 2) != 0;
    00062 }
    00063
    00070 static inline BridgeType GetBridgeType(TileIndex t)
    00071 {
    00072   assert(IsBridgeTile(t));
    00073   return GB(_m[t].m6, 2, 4);
    00074 }
    00075
    00082 static inline Axis GetBridgeAxis(TileIndex t)
    00083 {
    00084   assert(IsBridgeAbove(t));
    00085   return (Axis)(GB(_m[t].m6, 6, 2) - 1);
    00086 }
    00087
    00088 TileIndex GetNorthernBridgeEnd(TileIndex t);
    00089 TileIndex GetSouthernBridgeEnd(TileIndex t);
    00090 TileIndex GetOtherBridgeEnd(TileIndex t);
    00091
    00092 uint GetBridgeHeight(TileIndex tile);
    00093
    00100 static inline void ClearSingleBridgeMiddle(TileIndex t, Axis a)
    00101 {
    00102   assert(MayHaveBridgeAbove(t));
    00103   ClrBit(_m[t].m6, 6 + a);
    00104 }
    00105
    00111 static inline void ClearBridgeMiddle(TileIndex t)
    00112 {
    00113   ClearSingleBridgeMiddle(t, AXIS_X);
    00114   ClearSingleBridgeMiddle(t, AXIS_Y);
    00115 }
    00116
    00123 static inline void SetBridgeMiddle(TileIndex t, Axis a)
    00124 {
    00125   assert(MayHaveBridgeAbove(t));
    00126   SetBit(_m[t].m6, 6 + a);
    00127 }
    00128
    00139 static inline void MakeBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, TransportType tt, uint rt)
    00140 {
    00141   SetTileType(t, MP_TUNNELBRIDGE);
    00142   SetTileOwner(t, o);
    00143   _m[t].m2 = 0;
    00144   _m[t].m3 = rt;
    00145   _m[t].m4 = 0;
    00146   _m[t].m5 = 1 << 7 | tt << 2 | d;
    00147   SB(_m[t].m6, 2, 4, bridgetype);
    00148   _me[t].m7 = 0;
    00149 }
    00150
    00159 static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RoadTypes r)
    00160 {
    00161   MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD, 0);
    00162   SetRoadOwner(t, ROADTYPE_ROAD, o);
    00163   if (o != OWNER_TOWN) SetRoadOwner(t, ROADTYPE_TRAM, o);
    00164   SetRoadTypes(t, r);
    00165 }
    00166
    00175 static inline void MakeRailBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RailType r)
    00176 {
    00177   MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL, r);
    00178 }
    00179
    00186 static inline void MakeAqueductBridgeRamp(TileIndex t, Owner o, DiagDirection d)
    00187 {
    00188   MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER, 0);
    00189 }
    00190
    00191 #endif /* BRIDGE_MAP_H */