static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
TileIndex tile = object->u.canal.tile;
switch (variable) {
/* Height of tile */
case 0x80: {
uint z = GetTileZ(tile) / TILE_HEIGHT;
/* Return consistent height within locks */
if (IsTileType(tile, MP_WATER) && IsLock(tile) && GetSection(tile) >= 8) z--;
return z;
}
/* Terrain type */
case 0x81: return GetTerrainType(tile);
/* Random data for river or canal tiles, otherwise zero */
case 0x83: return IsTileType(tile, MP_WATER) ? GetWaterTileRandomBits(tile) : 0;
}
DEBUG(grf, 1, "Unhandled canal variable 0x%02X", variable);
*available = false;
return UINT_MAX;
}
/* virtual */ uint32 CanalScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
{
switch (variable) {
/* Height of tile */
case 0x80: {
int z = GetTileZ(this->tile);
/* Return consistent height within locks */
if (IsTileType(this->tile, MP_WATER) && IsLock(this->tile) && GetLockPart(this->tile) == LOCK_PART_UPPER) z--;
return z;
}
/* Terrain type */
case 0x81: return GetTerrainType(this->tile);
/* Dike map: Connectivity info for river and canal tiles
*
* Assignment of bits to directions defined in agreement with
* http://projects.tt-forums.net/projects/ttdpatch/repository/revisions/2367/entry/trunk/patches/water.asm#L879
* 7
* 3 0
* 6 * 4
* 2 1
* 5
*/
case 0x82: {
uint32 connectivity =
(!IsWateredTile(TILE_ADDXY(tile, -1, 0), DIR_SW) << 0) // NE
+ (!IsWateredTile(TILE_ADDXY(tile, 0, 1), DIR_NW) << 1) // SE
+ (!IsWateredTile(TILE_ADDXY(tile, 1, 0), DIR_NE) << 2) // SW
+ (!IsWateredTile(TILE_ADDXY(tile, 0, -1), DIR_SE) << 3) // NW
+ (!IsWateredTile(TILE_ADDXY(tile, -1, 1), DIR_W) << 4) // E
+ (!IsWateredTile(TILE_ADDXY(tile, 1, 1), DIR_N) << 5) // S
+ (!IsWateredTile(TILE_ADDXY(tile, 1, -1), DIR_E) << 6) // W
+ (!IsWateredTile(TILE_ADDXY(tile, -1, -1), DIR_S) << 7); // N
return connectivity;
}
/* Random data for river or canal tiles, otherwise zero */
case 0x83: return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
}
DEBUG(grf, 1, "Unhandled canal variable 0x%02X", variable);
*available = false;
return UINT_MAX;
}
static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
TileIndex tile = object->u.canal.tile;
switch (variable) {
/* Height of tile */
case 0x80: return GetTileZ(tile) / TILE_HEIGHT;
/* Terrain type */
case 0x81: return GetTerrainType(tile);
/* Random data for river or canal tiles, otherwise zero */
case 0x83: return GetWaterTileRandomBits(tile);
}
DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
*available = false;
return UINT_MAX;
}
/* virtual */ uint32 CanalScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
{
switch (variable) {
/* Height of tile */
case 0x80: {
int z = GetTileZ(this->tile);
/* Return consistent height within locks */
if (IsTileType(this->tile, MP_WATER) && IsLock(this->tile) && GetLockPart(this->tile) == LOCK_PART_UPPER) z--;
return z;
}
/* Terrain type */
case 0x81: return GetTerrainType(this->tile);
/* Random data for river or canal tiles, otherwise zero */
case 0x83: return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
}
DEBUG(grf, 1, "Unhandled canal variable 0x%02X", variable);
*available = false;
return UINT_MAX;
}
/* Random bits and triggers are not supported for canals, so the following
* three functions are stubs. */
static uint32 CanalGetRandomBits(const ResolverObject *object)
{
/* Return random bits only for water tiles, not station tiles */
return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
}
/* virtual */ uint32 CanalScopeResolver::GetRandomBits() const
{
/* Return random bits only for water tiles, not station tiles */
return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
}