# bridge_map.h

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    00001 /* $Id: bridge_map.h 18028 2009-11-09 10:40:33Z 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 "direction_func.h"
    00016 #include "rail_type.h"
    00017 #include "transport_type.h"
    00018 #include "road_map.h"
    00019 #include "bridge.h"
    00020
    00027 static inline bool IsBridge(TileIndex t)
    00028 {
    00029   assert(IsTileType(t, MP_TUNNELBRIDGE));
    00030   return HasBit(_m[t].m5, 7);
    00031 }
    00032
    00038 static inline bool IsBridgeTile(TileIndex t)
    00039 {
    00040   return IsTileType(t, MP_TUNNELBRIDGE) && IsBridge(t);
    00041 }
    00042
    00049 static inline bool MayHaveBridgeAbove(TileIndex t)
    00050 {
    00051   return
    00052     IsTileType(t, MP_CLEAR) ||
    00053     IsTileType(t, MP_RAILWAY) ||
    00054     IsTileType(t, MP_ROAD) ||
    00055     IsTileType(t, MP_WATER) ||
    00056     IsTileType(t, MP_TUNNELBRIDGE) ||
    00057     IsTileType(t, MP_UNMOVABLE);
    00058 }
    00059
    00066 static inline bool IsBridgeAbove(TileIndex t)
    00067 {
    00068   assert(MayHaveBridgeAbove(t));
    00069   return GB(_m[t].m6, 6, 2) != 0;
    00070 }
    00071
    00078 static inline BridgeType GetBridgeType(TileIndex t)
    00079 {
    00080   assert(IsBridgeTile(t));
    00081   return GB(_m[t].m6, 2, 4);
    00082 }
    00083
    00090 static inline Axis GetBridgeAxis(TileIndex t)
    00091 {
    00092   assert(IsBridgeAbove(t));
    00093   return (Axis)(GB(_m[t].m6, 6, 2) - 1);
    00094 }
    00095
    00100 TileIndex GetNorthernBridgeEnd(TileIndex t);
    00101
    00106 TileIndex GetSouthernBridgeEnd(TileIndex t);
    00107
    00108
    00113 TileIndex GetOtherBridgeEnd(TileIndex t);
    00114
    00120 uint GetBridgeHeight(TileIndex tile);
    00121
    00128 static inline void ClearSingleBridgeMiddle(TileIndex t, Axis a)
    00129 {
    00130   assert(MayHaveBridgeAbove(t));
    00131   ClrBit(_m[t].m6, 6 + a);
    00132 }
    00133
    00139 static inline void ClearBridgeMiddle(TileIndex t)
    00140 {
    00141   ClearSingleBridgeMiddle(t, AXIS_X);
    00142   ClearSingleBridgeMiddle(t, AXIS_Y);
    00143 }
    00144
    00151 static inline void SetBridgeMiddle(TileIndex t, Axis a)
    00152 {
    00153   assert(MayHaveBridgeAbove(t));
    00154   SetBit(_m[t].m6, 6 + a);
    00155 }
    00156
    00167 static inline void MakeBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, TransportType tt, uint rt)
    00168 {
    00169   SetTileType(t, MP_TUNNELBRIDGE);
    00170   SetTileOwner(t, o);
    00171   _m[t].m2 = 0;
    00172   _m[t].m3 = rt;
    00173   _m[t].m4 = 0;
    00174   _m[t].m5 = 1 << 7 | tt << 2 | d;
    00175   SB(_m[t].m6, 2, 4, bridgetype);
    00176   _me[t].m7 = 0;
    00177 }
    00178
    00187 static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RoadTypes r)
    00188 {
    00189   MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD, 0);
    00190   SetRoadOwner(t, ROADTYPE_ROAD, o);
    00191   if (o != OWNER_TOWN) SetRoadOwner(t, ROADTYPE_TRAM, o);
    00192   SetRoadTypes(t, r);
    00193 }
    00194
    00203 static inline void MakeRailBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RailType r)
    00204 {
    00205   MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL, r);
    00206 }
    00207
    00214 static inline void MakeAqueductBridgeRamp(TileIndex t, Owner o, DiagDirection d)
    00215 {
    00216   MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER, 0);
    00217 }
    00218
    00219 #endif /* BRIDGE_MAP_H */