mharrys / omni

Omnidirectional Shadow Mapping

Omnidirectional Shadow Mapping

Demonstration on how to produce shadows for a point light. This requires six render passes to build the shadow map, then one additional render pass to render the scene with shadows.

• Press F1 to toggle shadows.
• Press F2 to toggle shading (shadow only mode).
• Press SPACE to toggle point light movement.

Screenshot

How-to

This project depends on Gust, see its project page for details on dependencies.

Recursive clone required

$ git clone --recursive <repository>

Build and run

$ scons
$ cd bin
$ ./omni

Cleanup

$ scons -c

References

1. Lance Williams. Casting curved shadows on curved surfaces. SIGGRAPH’78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques, pages 270–274, 1978.
2. Dave Shreiner; Graham Sellers; John M. Kessenich; Bill M. Licea-Kane. OpenGL Programming Guide: The Official Guide to Learning OpenGL. Addison-Wesley Professional, 8th edition, 2013.
3. Philipp S. Gerasimov. Chapter 12. omnidirectional shadow mapping. c2004 [downloaded 2014 May 13]. Available from http://http.developer.nvidia.com/GPUGems/gpugems_ch12.html.
4. Specification for texture cube map. c1999 [downloaded 2014 May 20]. Available from https://www.opengl.org/registry/specs/ARB/texture_cube_map.txt.