Keywords: Phong Vectors.svg en A diagram showing the vectors used in calculating Phong lighting relative to a surface point N the surface normal L normalized vector in direction of light source R normalized vector in direction of specular light reflection V normalized vector in direction of viewer Image originally created by User Fuzzypeg in Inkscape and modified by User Martin Kraus; released to the public domain 2011-06-17 own Martin Kraus cc-zero Uploaded with UploadWizard Illustrations Computer science |