[PyOpenGL] How do I save runtime on drawing HUGE polylines (120 000 vertices)?

[Mike C. Fletcher]

F. GEIGER wrote:
...

> The above print statement shows, that 5 secs are consumed for about 
> 120 000 (hundred-twenty-thousand) vertices. You guess, the whole GUI 
> becomes  unusable.

...

> So I wonder, do I really need to draw those 120000 vertices over and 
> over again? 

Yes, that's the nature of OpenGL.

> Would glArrays perform much better? 

Certainly.  The array-drawing functionality is always going to be faster 
than writing loops in Python.  You'll notice that OpenGLContext goes to 
great lengths to push almost all of its rendering into array-based 
operations.

> Or is this a case for Display Lists? Any other idea?

Display lists should be fine too, though you'd still have a 5 second 
delay waiting for them to compile.

HTH,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/
  blog: http://zope.vex.net/~mcfletch/plumbing/