On 10/13/2010 8:41 AM, Jason Daly wrote: > I don't know if I'd call it "canonical", but I think the Nvidia Cg book has a > method to > convert height field images into normal maps, which at least sounds similar > to what you're > looking for. I'd check to be sure it's there, but I can't seem to find my > copy right now.
Thanks. I've seen a couple of pieces of code that do it in pre-processing in C, but I've not seen anyone who does it on the fly in GLSL. Which I find odd. I do understand it's better to create a lookup table to avoid the heavy-lifting trig in each fragment, and I plan to do that, but I haven't even found an implementation of that yet. This seems odd to me since I figured procedural textures and bump mapping would be pretty common in GLSL. > --"J" -- Chris 'Xenon' Hanson, omo sanza lettere. [email protected] http://www.alphapixel.com/ Digital Imaging. OpenGL. Scene Graphs. GIS. GPS. Training. Consulting. Contracting. "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
