John Harrison wrote: > Nevermind. I violated the rule of never putting the glPushName or > glLoadName in between glBegin and glEnd statements: > http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/pushname.html > > Something of an annoying restriction, but I can deal with it. >
But... You are supposed to think of the names as naming objects (defined by glBegin/glEnd pairs), not individual vertices. From that point of view, changing an object's name half way through its definition brings up the question of which name to report in the selection buffer, the name in effect at the glBegin, or the name in effect at the glEnd, or one (but which) of the (many) names in effect between the two or ... Better to just avoid that ambiguity by disallowing it. Gary Herron > On Apr 7, 12:41 pm, John Harrison <[EMAIL PROTECTED]> wrote: > >> I am attempting to use pyglet to do mousepress picking. This works >> fine if I keep all my picking code in a single method or function. >> However, if I try to do any decomposition I run into problems. I can >> put drawing code in other functions, but if I put either glLoadName or >> glPushName calls into another function I get the following error: >> File "city.py", line 755, in pick >> glSelectBuffer (512, selectBuf) >> File "build/bdist.linux-x86_64/egg/pyglet/gl/lib.py", line 89, in >> errcheck >> pyglet.gl.lib.GLException: invalid operation >> >> I don't understand why I can't declare a selection buffer in one >> method and then push names onto the stack in another. >> >> Anybody have any ideas? >> > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "pyglet-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pyglet-users?hl=en -~----------~----~----~----~------~----~------~--~---
