-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jerome Glisse wrote: > On 6/23/06, Daniel Sperka <[EMAIL PROTECTED]> wrote: > >>I see. Sorry I missed that. I certainly didn't mean to complain that >>something was out of spec. Just hoping that this feature worked - ahh >>had more than a range of min=1 and max=1. Yes that's fully compliant, >>I'll shut up. >> >>In my case I need glPointSize because I want to draw dots on a plane so >>that their size doesn't vary with distance from the camera. It may sound >>silly to want to do this, but the application is used in a neuroscience >>context, and we want to eliminate depth cues due to perspective (without >>using an orthographic view). Polygons, if I go that route, will be >>smaller on the horizon than they are when they're close to the camera. >>Textures have the same problem, I think. Points are perfect for this >>however. They're rectangular glPointSize() x glPointSize() things >>regardless of where in the scene they're drawn. If there's another way >>to accomplish this I'd love to hear it - the ATI drivers have their own >>issues. > > You could do this with polygon and orthographic view, remember opengl > is a state machine. Thus when you want to render this dot, save view > transformation switch to orthographic then draw, restore view transformation.
Ouch! That sounds even more painful (and slower!) than adding code to the driver to emulate large points. > It better doing and making no assumption on glPointSize as you might > once and again find other implementation with min & max value = 1. Better for whom??? The egg on our face is that, AFAIK, Mesa based drivers are the *only* drivers that don't support this functionality. That app developers expect it to be there isn't surprising. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEnDDRX1gOwKyEAw8RAv7ZAKCLLNzBzSw51sFPOD5UzvbO0GS/6gCdG+bl Js0F53MYfdJzfir4F3YYVRI= =TRur -----END PGP SIGNATURE----- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
