/* 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; }
/* 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; }