# bridge_map.h

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    00001 /* $Id: bridge_map.h 18809 2010-01-15 16:41:15Z rubidium $ */
    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
    00049     IsTileType(t, MP_CLEAR) ||
    00050     IsTileType(t, MP_RAILWAY) ||
    00051     IsTileType(t, MP_ROAD) ||
    00052     IsTileType(t, MP_WATER) ||
    00053     IsTileType(t, MP_TUNNELBRIDGE) ||
    00054     IsTileType(t, MP_UNMOVABLE);
    00055 }
    00056
    00063 static inline bool IsBridgeAbove(TileIndex t)
    00064 {
    00065   assert(MayHaveBridgeAbove(t));
    00066   return GB(_m[t].m6, 6, 2) != 0;
    00067 }
    00068
    00075 static inline BridgeType GetBridgeType(TileIndex t)
    00076 {
    00077   assert(IsBridgeTile(t));
    00078   return GB(_m[t].m6, 2, 4);
    00079 }
    00080
    00087 static inline Axis GetBridgeAxis(TileIndex t)
    00088 {
    00089   assert(IsBridgeAbove(t));
    00090   return (Axis)(GB(_m[t].m6, 6, 2) - 1);
    00091 }
    00092
    00097 TileIndex GetNorthernBridgeEnd(TileIndex t);
    00098
    00103 TileIndex GetSouthernBridgeEnd(TileIndex t);
    00104
    00105
    00110 TileIndex GetOtherBridgeEnd(TileIndex t);
    00111
    00117 uint GetBridgeHeight(TileIndex tile);
    00118
    00125 static inline void ClearSingleBridgeMiddle(TileIndex t, Axis a)
    00126 {
    00127   assert(MayHaveBridgeAbove(t));
    00128   ClrBit(_m[t].m6, 6 + a);
    00129 }
    00130
    00136 static inline void ClearBridgeMiddle(TileIndex t)
    00137 {
    00138   ClearSingleBridgeMiddle(t, AXIS_X);
    00139   ClearSingleBridgeMiddle(t, AXIS_Y);
    00140 }
    00141
    00148 static inline void SetBridgeMiddle(TileIndex t, Axis a)
    00149 {
    00150   assert(MayHaveBridgeAbove(t));
    00151   SetBit(_m[t].m6, 6 + a);
    00152 }
    00153
    00164 static inline void MakeBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, TransportType tt, uint rt)
    00165 {
    00166   SetTileType(t, MP_TUNNELBRIDGE);
    00167   SetTileOwner(t, o);
    00168   _m[t].m2 = 0;
    00169   _m[t].m3 = rt;
    00170   _m[t].m4 = 0;
    00171   _m[t].m5 = 1 << 7 | tt << 2 | d;
    00172   SB(_m[t].m6, 2, 4, bridgetype);
    00173   _me[t].m7 = 0;
    00174 }
    00175
    00184 static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RoadTypes r)
    00185 {
    00186   MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD, 0);
    00187   SetRoadOwner(t, ROADTYPE_ROAD, o);
    00188   if (o != OWNER_TOWN) SetRoadOwner(t, ROADTYPE_TRAM, o);
    00189   SetRoadTypes(t, r);
    00190 }
    00191
    00200 static inline void MakeRailBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RailType r)
    00201 {
    00202   MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL, r);
    00203 }
    00204
    00211 static inline void MakeAqueductBridgeRamp(TileIndex t, Owner o, DiagDirection d)
    00212 {
    00213   MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER, 0);
    00214 }
    00215
    00216 #endif /* BRIDGE_MAP_H */