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Keywords: Shadow of Sphere.svg en A diagram showing the vectors used in calculating the shadowing of a sphere at a point on a surface L vector to the light source S vector to the center of the sphere T tangent vector to the sphere d distance of tangent from the center of the light source Image originally created by User Fuzzypeg in Inkscape and modified by User Martin Kraus; released to the public domain 2011-06-27 own Martin Kraus cc-zero Uploaded with UploadWizard Illustrations |