private void OnEnable()
{
Instance = this;
var treeCount = terrain.terrainData.treeInstances.Length;
var sizeSphere = System.Runtime.InteropServices.Marshal.SizeOf(typeof(Sphere));
spheres = new Sphere[treeCount];
for (var i = 0; i < terrain.terrainData.treeInstances.Length; i++)
{
var tree = terrain.terrainData.treeInstances[i];
var position = Vector3.Scale(tree.position, terrain.terrainData.size);
position = terrain.transform.TransformPoint(position);
spheres[i].center = position + sphereCenterOffset;
spheres[i].sqrRadius = sphereRadius * sphereRadius;
}
}
private void OnDisable()
{
spheres = null;
Instance = null;
}
