Function TerraformAddDirtyTileAround

src/terraform_cmd.cpp:82–89

* Adds all tiles that incident with the north corner of a specific tile to the "tile_table" in a TerraformerState. * * @param ts TerraformerState. * @param tile Tile. * @ingroup dirty */

 * @ingroup dirty
 */
static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)
{
	/* Make sure all tiles passed to TerraformAddDirtyTile are within [0, Map::Size()] */
	if (TileY(tile) >= 1) TerraformAddDirtyTile(ts, tile + TileDiffXY( 0, -1));
	if (TileY(tile) >= 1 && TileX(tile) >= 1) TerraformAddDirtyTile(ts, tile + TileDiffXY(-1, -1));
	if (TileX(tile) >= 1) TerraformAddDirtyTile(ts, tile + TileDiffXY(-1,  0));
	TerraformAddDirtyTile(ts, tile);
}

/**
 * Terraform the north corner of a tile to a specific height.