Can any one give me a link to a tutorial about vertex sader in openGL ? thanx
Over at SGI they have a whole bunch of good tutorials. Some say they are a bit dry and difficult to read, but I like em.
Here is the one you want: http://oss.sgi.com/projects/ogl-sample/registry/ARB/vertex_program.txt
Other than that, ask dr google.
The extensions specs are good for a reference (and for bedtime reading 
), but they aren’t the best “tutorials” per se.
This is probably the simplest vertex program tutorial you’ll find…
http://opengl.nutty.org/extensions/index.html
It’s down near the bottom. Don’t get distracted by the S3TC tutorial… <grin>