The NormalToLocal method of the Transform struct is used to convert a normal vector from world space to local space. This is particularly useful when you need to transform normals for lighting calculations or when working with objects that have been transformed in the world.
To use the NormalToLocal method, you need to have a Transform instance. You pass a reference to a Vector3 representing the normal in world space, and the method returns a Vector3 representing the normal in local space.
// Assume 'transform' is an instance of Transform Vector3 worldNormal = new Vector3(0, 1, 0); // Example world normal Vector3 localNormal = transform.NormalToLocal(ref worldNormal); // Now 'localNormal' contains the normal in the local space of 'transform'.