That turned out to be exactly what I needed. Thanks again! It looks to me like all I needed to do was change the calling convention to WINFUNCTYPE. I know I tried using WINFUNCTYPE ways but apparently I didn't try the correct permutation.
ctypes is tricky and it seems like having the wrong function type gets you some sort of obtuse messages: ctypes.ArgumentError: argument 3: <type 'exceptions.TypeError'>: expected CFunctionType instance instead of CFunctionType -b On Jul 29, 8:18 am, Ben Smith <[email protected]> wrote: > Cool, thanks a bunch! I'll be able to look at it later in the day. > PyOpenGL has something that apparently works too, but I haven't been > able to condense enough of the specifics out of it to get things going > yet. > > -b > > On Jul 28, 6:02 am, Tartley <[email protected]> wrote: > > > > > I don't know what your specific problem is, but the ctypes wriggling > > to get glu callbacks setup right seems a big tricky. I stole a working > > solution using glu tessellation from Squirtle recently, and it's > > working fine for me. > > > Squirtle, the original, is here. They use it to ultimately produce > > display lists:http://www.supereffective.org/pages/Squirtle-SVG-Library > > > My copy is here, modified slightly - I use it to produce indexed > > vertex arrays > > instead:http://code.google.com/p/svgload/source/browse/trunk/svgbatch/tessela... > > > Best regards, > > > Jonathan > > > On Jul 25, 6:03 pm, Ben Smith <[email protected]> wrote: > > > > Hello. Been working through the opengl superbible samples and have > > > over fifty of them converted to python. > > > > I'm going mad trying to use tesselation in pyglet, a demonstration in > > > chapter 10 of the book. I *think* I've worked out an ugly way to get > > > the callback functions working, but I get an access violation > > > exception thrown from gluTessEndPolygon. I may be incorrect about my > > > callback functions working correctly, and that might be the source of > > > the problem, but I thought I'd see if anyone had some insight. > > > > Traceback (most recent call last): > > > File "florida.py", line 232, in <module> > > > pyglet.app.run() > > > File "c:\Python26\lib\site-packages\pyglet\app\__init__.py", line > > > 264, in run > > > EventLoop().run() > > > File "c:\Python26\lib\site-packages\pyglet\app\win32.py", line 74, > > > in run > > > self._timer_func(0, 0, timer, 0) > > > File "c:\Python26\lib\site-packages\pyglet\app\win32.py", line 84, > > > in _timer_func > > > sleep_time = self.idle() > > > File "c:\Python26\lib\site-packages\pyglet\app\__init__.py", line > > > 193, in idle > > > window.dispatch_event('on_draw') > > > File "c:\Python26\lib\site-packages\pyglet\window\__init__.py", line > > > 1217, in dispatch_event > > > EventDispatcher.dispatch_event(self, *args) > > > File "c:\Python26\lib\site-packages\pyglet\event.py", line 349, in > > > dispatch_event > > > getattr(self, event_type)(*args) > > > File "florida.py", line 146, in on_draw > > > gluTessEndPolygon(pTess) > > > WindowsError: exception: access violation writing 0x0027AF8D > > > > The file I've been slavishly hacking on is > > > here:http://github.com/BenSmith/PythonOpenGLSuperBible4/blob/1440145adf203... > > > > It won't crash right away, you'll need to press the number 2 or 3 key > > > on your keyboard to enter the areas of code that use gluTessCallback > > > and gluTessEndPolygon. > > > > Happy hacking, > > > -b --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
