"There is a theory which states that if ever anybody discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened."
- Douglas Adams
Framework 4 (Last updated: October 25, 2019)
Framework 3 (Last updated: February 6, 2017)
Framework 2 (Last updated: October 8, 2006)
Framework (Last updated: October 8, 2006)
Libraries (Last updated: September 16, 2004)
Really old framework (Last updated: September 16, 2004)
Perpixel spotlights
Monday, May 13, 2002 | Permalink

Executable
Source code
Spotlights.zip (625 KB)

Required:
GL_ARB_texture_env_dot3
GL_ARB_texture_env_crossbar or GL_NV_texture_env_combine4
GL_EXT_texture3D
GL_EXT_texture_edge_clamp
Recommended:
GL_ARB_texture_compression
GL_EXT_texture_compression_s3tc
This is a demo of perpixel shotlights. Two flashlights are flying around lighting the bumpy walls. Looks pretty cool
The effect requires four texture units, a bumpmap, vectorfield, spotlight texture, and a small 2 texel texture to remove the backprojection. (With fragment shaders the last texture shouldn't be neccesary)

It should run on Radeon 8500, Parhelia and GF3/4.
Source is included as usual.