# Difference between revisions of "Math and algorithms"

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+ | ; [[Compute eye space from window space]]: Algorithm and shader code for taking window space positions and computing eye space positions from them. | ||

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; [[Calculating a Surface Normal]] : Required from the application by OpenGL for lighting calculations. | ; [[Calculating a Surface Normal]] : Required from the application by OpenGL for lighting calculations. | ||

## Latest revision as of 18:48, 24 February 2012

- Compute eye space from window space
- Algorithm and shader code for taking window space positions and computing eye space positions from them.

- Calculating a Surface Normal
- Required from the application by OpenGL for lighting calculations.

- ID-Buffer
- A way to get the selection of the objects.

- Trackball
- Object rotation via a virtual trackball.