The Hacks of Life

I'm always astounded to discover that anyone, like, reads this blog. But on the off chance that anyone with serious tool-chain/content-p...

One more note on derivatives in GLSL shaders: derivatives can run into precision problems that the underlying expressions don't have. ...

In my previous post I described how OpenGL often calculates derivatives by differencing nearby pixels in a block. This can cause problems ...

The short of it is this: if you see 2x2 pixel artifacts in your shader, you might need texture2DGrad. Now the long version. How does OpenGL...

I finally figured out (thanks to this ) how to get CVS to notify us somewhere other than the mail service of the server it's running on....

A while ago I suggested that we can't use atomic compare and swap (CAS) and reference counting together to update an arbitrary data str...

I've been poking at GPU ShaderAnalyzer ; this Windows performance tool from ATI gives you a simple environment: you enter GLSL, hit comp...