void Awake()
{
_xy1xy2PropID = Shader.PropertyToID("_xy1xy2");
_mpb = new MaterialPropertyBlock();
_renderer = GetComponent <Renderer>();
MeshCollider collider = GetComponent <MeshCollider>();
if (collider != null)
{
_colliderID = collider.GetInstanceID();
}
}
void Update()
{
if (_renderer != null)
{
// Raycast with the scene to get UV coords of hits
Vector4 xy1xy2 = new Vector4(0f, 0f, 1f, 1f);
RaycastHit hit;
if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit))
{
MeshCollider hitCollider = hit.collider as MeshCollider;
if (hitCollider != null && hitCollider.GetInstanceID() == _colliderID)
{
xy1xy2.x = hit.textureCoord.x;
xy1xy2.y = hit.textureCoord.y;
_mpb.SetVector(_xy1xy2PropID, xy1xy2);
_renderer.SetPropertyBlock(_mpb);
}
}
}
}
