Displacement mapping on R300/R350

[_arsil]

I wonder, if anyone ever tried to do something with displacement mapping on R300? DX9 caps show, that Radeons 9500/9700 (probably 9800 also) support pre-filtered displacement mapping, which means, that theirs capabilities are very limited. It seams that adaptive tesselation is not possible, and this pre-filtered displacement mapping is nothing more than a simple “get a value from memory (texture, without any filtering)â€￾, that can be done without any special hardware on any vertex shader capable hardware...

Maybe someone from ATI could tell us something about this. I didn't find any source code or technical papers related to the DX9 displacement mapping. There are a lot of rumors and marketing slogans, but zero facts/examples....

Arsil.

 

[OpenGL guy]

Maybe someone from ATI could tell us something about this. I didn't find any source code or technical papers related to the DX9 displacement mapping. There are a lot of rumors and marketing slogans, but zero facts/examples....

Someone from ATi is giving a presentation at GDC about displacement mapping using vertex and pixel shaders.

 

[dominikbehr]

there was nice session on displacement mapping at GDC on thursday.
the coolest thing was the render to vertex array demo on radeon using uberbuffers opengl extension.

http://www.cmpevents.com/GDx/a.asp?option=C&V=11&SessID=684

 

[3dcgi]

Hopefully Ati will make these presentations available on the web site after GDC is over.