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@ r3225:c5b1dafc46ed
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Location: cpp/openttd-patchpack/source/bridge_map.h
r3225:c5b1dafc46ed
3.2 KiB
text/x-c
(svn r3898) Add functions to find a bridge end starting at a middle tile
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* $Id$ */
#ifndef BRIDGE_MAP_H
#define BRIDGE_MAP_H
#include "direction.h"
#include "macros.h"
#include "map.h"
#include "rail.h"
#include "tile.h"
static inline bool IsBridgeRamp(TileIndex t)
{
return !HASBIT(_m[t].m5, 6);
}
static inline bool IsBridgeMiddle(TileIndex t)
{
return HASBIT(_m[t].m5, 6);
}
/**
* Get the direction pointing onto the bridge
*/
static inline DiagDirection GetBridgeRampDirection(TileIndex t)
{
/* Heavy wizardry to convert the X/Y (bit 0) + N/S (bit 5) encoding of
* bridges to a DiagDirection
*/
return (DiagDirection)((6 - (_m[t].m5 >> 4 & 2) - (_m[t].m5 & 1)) % 4);
}
static inline Axis GetBridgeAxis(TileIndex t)
{
return (Axis)GB(_m[t].m5, 0, 1);
}
static inline bool IsClearUnderBridge(TileIndex t)
{
return GB(_m[t].m5, 3, 3) == 0;
}
static inline bool IsTransportUnderBridge(TileIndex t)
{
return HASBIT(_m[t].m5, 5);
}
static inline TransportType GetTransportTypeUnderBridge(TileIndex t)
{
return (TransportType)GB(_m[t].m5, 3, 2);
}
/**
* Finds the end of a bridge in the specified direction starting at a middle tile
*/
TileIndex GetBridgeEnd(TileIndex, DiagDirection);
/**
* Finds the southern end of a bridge starting at a middle tile
*/
TileIndex GetSouthernBridgeEnd(TileIndex t);
/**
* Starting at one bridge end finds the other bridge end
*/
TileIndex GetOtherBridgeEnd(TileIndex);
static inline void SetClearUnderBridge(TileIndex t)
{
SetTileOwner(t, OWNER_NONE);
SB(_m[t].m5, 3, 3, 0 << 2 | 0);
}
static inline void SetWaterUnderBridge(TileIndex t)
{
SetTileOwner(t, OWNER_WATER);
SB(_m[t].m5, 3, 3, 0 << 2 | 1);
}
static inline void SetRailUnderBridge(TileIndex t, Owner o, RailType r)
{
SetTileOwner(t, o);
SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_RAIL);
SB(_m[t].m3, 0, 4, r);
}
static inline void SetRoadUnderBridge(TileIndex t, Owner o)
{
SetTileOwner(t, o);
SB(_m[t].m5, 3, 3, 1 << 2 | TRANSPORT_ROAD);
}
static inline void MakeBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d, TransportType tt)
{
uint northsouth = (d == DIAGDIR_NE || d == DIAGDIR_NW);
SetTileType(t, MP_TUNNELBRIDGE);
SetTileOwner(t, o);
_m[t].m2 = bridgetype << 4;
_m[t].m4 = 0;
_m[t].m5 = 1 << 7 | 0 << 6 | northsouth << 5 | tt << 1 | DiagDirToAxis(d);
}
static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d)
{
MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD);
_m[t].m3 = 0;
}
static inline void MakeRailBridgeRamp(TileIndex t, Owner o, uint bridgetype, DiagDirection d, RailType r)
{
MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL);
_m[t].m3 = r;
}
static inline void MakeBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, TransportType tt)
{
SetTileType(t, MP_TUNNELBRIDGE);
SetTileOwner(t, OWNER_NONE);
_m[t].m2 = bridgetype << 4 | piece;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = 1 << 7 | 1 << 6 | 0 << 5 | 0 << 3 | tt << 1 | a;
}
static inline void MakeRoadBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a)
{
MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_ROAD);
}
static inline void MakeRailBridgeMiddle(TileIndex t, uint bridgetype, uint piece, Axis a, RailType r)
{
MakeBridgeMiddle(t, bridgetype, piece, a, TRANSPORT_RAIL);
SB(_m[t].m3, 4, 4, r);
}
#endif
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