September 2018
Intermediate to advanced
472 pages
15h 36m
English
Content preview from OpenGL 4 Shading Language Cookbook - Third Edition
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How it works...
We compute the halfway vector by summing the direction toward the viewer (v), and the direction toward the light source (s), and normalizing the result. The value for the halfway vector is then stored in h. The specular calculation is then modified to use the dot product between h and the normal vector (n). The rest of the calculation is unchanged.
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