Portal:Algorithms

V · E

Algorithms

These are a set of algorithms that will be useful for various rendering techniques.

V · E Calculate Surface Normal The normal for a vertex is vital information for computing lighting. Many mesh creation platforms will automatically compute vertex normals, but if you are getting a mesh from an arbitrary source, it is important to know how to compute those normals manually.

V · E Orient Object with Mouse It is often useful to be able to manipulate the orientation of objects with the mouse. This algorithm explains how to do so. V · E Eye Space from Window Space Deferred Rendering techniques will often need to obtain an eye-space on the lighting passes. This algorithm demonstrates three mechanisms for computing this value, so that you don't have to fetch it from a texture.