function lightProjectionUV( light, position = positionWorld ) {

	const spotLightCoord = lightShadowMatrix( light ).mul( position );
	const projectionUV = spotLightCoord.xyz.div( spotLightCoord.w );

	return projectionUV;

}
TSL function for getting projected uv coordinates for the given light.
Relevant when using maps with spot lights.

@tsl
@function
@param {Light} light -The light source.
@param {Node<vec3>} [position=positionWorld] -The position to project.
@returns {Node<vec3>} The projected uvs.