phongLighting([ ambientIntensity, diffuseIntensity, specularIntensity, shininess ])

Sets the parameters for the phong lighting effect.

The return value of this method can be used as the second argument to Layer.setBorderColor to configure phong lighting effect for the layer.

Argument	Default	Description
ambientIntensity	0.5	The ambient reflection coefficient of the Phong lighting model.
diffuseIntensity	0.5	The diffuse reflection coefficient of the Phong lighting model.
specularIntensity	0.75	The specular reflection coefficient of the Phong lighting model.
shininess	8	The shininess coefficient of the Phong lighting model.

An integer representing the phong lighting effect.