Files @ r3933:400e9c30928e
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Location: cpp/openttd-patchpack/source/water_map.h

celestar
(svn r5070) Merged the bridge branch
-Feature: Bridges can now be placed above:
Any railway track combination (excluding depots and waypoints)
Any road combination (excluding depots)
Clear tiles (duh), including fields
Tunnel entrances
Bridge heads

Thanks to Tron for idea and implementation, KUDr for the yapf synchronization and many others for hours of testing

There are still a number of visual problems remaining, especially when electric railways are on or under the bridge.
DO NOT REPORT THOSE BUGS FOR THE TIME BEING please.
/* $Id$ */

#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 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 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, byte section)
{
	SetTileType(t, MP_WATER);
	SetTileOwner(t, OWNER_WATER);
	_m[t].m2 = 0;
	_m[t].m3 = 0;
	_m[t].m4 = 0;
	_m[t].m5 = section;
}

static inline void MakeLock(TileIndex t, DiagDirection d)
{
	TileIndexDiff delta = TileOffsByDir(d);

	MakeLockTile(t, LOCK_MIDDLE + d);
	MakeLockTile(t - delta, LOCK_LOWER + d);
	MakeLockTile(t + delta, LOCK_UPPER + d);
}

#endif