난반사 (Diffuse)
LightVector = normalize(Light.Position - Object.Position)
Diffuse = saturate(dot(LightVector, Normal)
정반사 (Specular)
LightVector = normalize(Object.Position - Light.Position)
Reflection = reflect(LightVector. Normal)
CameraVector = normalize(Camera.Positon - Object.Position)
Specular = pow(saturate(dot(Reflection, CameraVector)), SpecularPower);
주변광 (Ambient)
Diffuse + Specular + Ambient
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