Posted by scott+jogamp@vorthmann.org on Jan 01, 2020; 12:24am
URL: https://forum.jogamp.org/questions-about-picking-tp4040211p4040216.html

Thank you, Sven!

I may be confused.  I thought that PMVMatrix could only be used with he fixed-function pipeline. Is it just emulating that pipeline, to allow picking to use the same logic as rendering?

If so, that’s clever, but I don’t benefit from the emulation, since I’m not rendering with that pipeline.  Still, I think I can see how to apply this to my geometry.  My only question is: how is the PMVMatrix initialized?  I’m having trouble tracking that through your source.

Is this what Julien referred to as “software rendering”, in that long, painful thread from 2014? The GPU seems completely uninvolved.  For vZome, I’ll be looking through potentially tens of thousands of objects, so I hope it can perform well.

Scott