the calculate process of the coordiate ?

[whoamiwww]

I think , clip coordiate =ProjectionMatrix*ModelViewMatrix*ObjectCorrdiate ;
then NormalizedCorrdiate= ClipCorrdiate/Wclip

Window = NormalizedCorrdiate *Width (or Height)
but the outcome is error ?
Who can tell me ?????????????????????????????????????????????????? ???????????????

[Deiussum]

I don't quite understand what your question is. You can read about the calculation process in the OpenGL specification. Perhaps that will help you undestand whatever problem you're encountering.

[whoamiwww]

where is the specification?
how can I find it ?

[Deiussum]

There's a link to it from this site.
http://www.opengl.org/developers/documentation/specs.html