private static void AddBiomeMaskToVegetationSystem(VegetationSystemPro vegetationSystem, PolygonBiomeMask maskArea)
{
int biomeSortOrder = vegetationSystem.GetBiomeSortOrder(maskArea.BiomeType);
maskArea.BiomeSortOrder = biomeSortOrder;
Rect maskRect = RectExtension.CreateRectFromBounds(maskArea.MaskBounds);
if (vegetationSystem.VegetationCellQuadTree != null && vegetationSystem.BillboardCellQuadTree != null)
{
List <VegetationCell> selectedCellList = new List <VegetationCell>();
vegetationSystem.VegetationCellQuadTree.Query(maskRect, selectedCellList);
for (int i = 0; i <= selectedCellList.Count - 1; i++)
{
selectedCellList[i].AddBiomeMask(maskArea);
}
List <BillboardCell> selectedBillboardCellList = new List <BillboardCell>();
vegetationSystem.BillboardCellQuadTree.Query(maskRect, selectedBillboardCellList);
for (int i = 0; i <= selectedBillboardCellList.Count - 1; i++)
{
selectedBillboardCellList[i].ClearCache();
}
}
}