public static void MassPlaceTrees(TerrainData terrainData, int numberOfTrees, bool randomTreeColor, bool keepExistingTrees)
{
int num = terrainData.treePrototypes.Length;
if (num == 0)
{
Debug.Log("Can't place trees because no prototypes are defined");
return;
}
Undo.RegisterCompleteObjectUndo(terrainData, "Mass Place Trees");
TreeInstance[] array = new TreeInstance[numberOfTrees];
int i = 0;
while (i < array.Length)
{
TreeInstance treeInstance = default(TreeInstance);
treeInstance.position = new Vector3(UnityEngine.Random.value, 0f, UnityEngine.Random.value);
if (terrainData.GetSteepness(treeInstance.position.x, treeInstance.position.z) < 30f)
{
treeInstance.color = ((!randomTreeColor) ? Color.white : TreePainter.GetTreeColor());
treeInstance.lightmapColor = Color.white;
treeInstance.prototypeIndex = UnityEngine.Random.Range(0, num);
treeInstance.heightScale = TreePainter.GetTreeHeight();
treeInstance.widthScale = ((!TreePainter.lockWidthToHeight) ? TreePainter.GetTreeWidth() : treeInstance.heightScale);
treeInstance.rotation = TreePainter.GetTreeRotation();
array[i++] = treeInstance;
}
}
if (keepExistingTrees)
{
TreeInstance[] treeInstances = terrainData.treeInstances;
TreeInstance[] array2 = new TreeInstance[treeInstances.Length + array.Length];
Array.Copy(treeInstances, 0, array2, 0, treeInstances.Length);
Array.Copy(array, 0, array2, treeInstances.Length, array.Length);
array = array2;
}
terrainData.treeInstances = array;
terrainData.RecalculateTreePositions();
}