(svn r7687) [cbh] - Fix: trains can now enter the bridge from side. They still can't leave it from side (pathfinder will need to be invoked when the other ramp is entered). Also the code is not very clear and needs review. It is more proof of concept than final solution. I hope that somebody smarter (Celestar) can do it better.
/* $Id$ */
#ifndef WATER_MAP_H
#define WATER_MAP_H
typedef enum WaterTileType {
WATER_CLEAR,
WATER_COAST,
WATER_LOCK,
WATER_DEPOT,
} WaterTileType;
typedef enum DepotPart {
DEPOT_NORTH = 0x80,
DEPOT_SOUTH = 0x81,
DEPOT_END = 0x84,
} DepotPart;
typedef enum LockPart {
LOCK_MIDDLE = 0x10,
LOCK_LOWER = 0x14,
LOCK_UPPER = 0x18,
LOCK_END = 0x1C
} LockPart;
static inline WaterTileType GetWaterTileType(TileIndex t)
{
if (_m[t].m5 == 0) return WATER_CLEAR;
if (_m[t].m5 == 1) return WATER_COAST;
if (IS_INT_INSIDE(_m[t].m5, LOCK_MIDDLE, LOCK_END)) return WATER_LOCK;
assert(IS_INT_INSIDE(_m[t].m5, DEPOT_NORTH, DEPOT_END));
return WATER_DEPOT;
}
static inline bool IsWater(TileIndex t)
{
return GetWaterTileType(t) == WATER_CLEAR;
}
static inline bool IsCoast(TileIndex t)
{
return GetWaterTileType(t) == WATER_COAST;
}
static inline bool IsClearWaterTile(TileIndex t)
{
return IsTileType(t, MP_WATER) && IsWater(t) && GetTileSlope(t, NULL) == SLOPE_FLAT;
}
static inline TileIndex GetOtherShipDepotTile(TileIndex t)
{
return t + (HASBIT(_m[t].m5, 0) ? -1 : 1) * (HASBIT(_m[t].m5, 1) ? TileDiffXY(0, 1) : TileDiffXY(1, 0));
}
static inline TileIndex IsShipDepot(TileIndex t)
{
return IS_INT_INSIDE(_m[t].m5, DEPOT_NORTH, DEPOT_END);
}
static inline Axis GetShipDepotAxis(TileIndex t)
{
return (Axis)GB(_m[t].m5, 1, 1);
}
static inline DiagDirection GetShipDepotDirection(TileIndex t)
{
return XYNSToDiagDir(GetShipDepotAxis(t), GB(_m[t].m5, 0, 1));
}
static inline DiagDirection GetLockDirection(TileIndex t)
{
return (DiagDirection)GB(_m[t].m5, 0, 2);
}
static inline byte GetSection(TileIndex t)
{
assert(GetWaterTileType(t) == WATER_LOCK || GetWaterTileType(t) == WATER_DEPOT);
return GB(_m[t].m5, 0, 4);
}
static inline void MakeWater(TileIndex t)
{
SetTileType(t, MP_WATER);
SetTileOwner(t, OWNER_WATER);
_m[t].m2 = 0;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = 0;
}
static inline void MakeShore(TileIndex t)
{
SetTileType(t, MP_WATER);
SetTileOwner(t, OWNER_WATER);
_m[t].m2 = 0;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = 1;
}
static inline void MakeCanal(TileIndex t, Owner o)
{
SetTileType(t, MP_WATER);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = 0;
}
static inline void MakeShipDepot(TileIndex t, Owner o, DepotPart base, Axis a)
{
SetTileType(t, MP_WATER);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = base + a * 2;
}
static inline void MakeLockTile(TileIndex t, Owner o, byte section)
{
SetTileType(t, MP_WATER);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = section;
}
static inline void MakeLock(TileIndex t, Owner o, DiagDirection d)
{
TileIndexDiff delta = TileOffsByDiagDir(d);
MakeLockTile(t, o, LOCK_MIDDLE + d);
MakeLockTile(t - delta, o, LOCK_LOWER + d);
MakeLockTile(t + delta, o, LOCK_UPPER + d);
}
#endif /* WATER_MAP_H */