I would love to answer your question. Unfortunately I'm an OpenGL newbie and don't know the answer(s). Thought I'd just let you know that at least someone is reading. :-)
Have you considered reading the Pyglet source code to see what it is doing in VertexList, IndexedVertexList, and Batch to see if you could get your answer that way? ~ Nathan On Saturday, March 31, 2012, AdamGriffiths wrote: > bump? > > On Mar 25, 4:18 pm, AdamGriffiths <[email protected]<javascript:;>> > wrote: > > Hi all, > > > > I'm working on a python framework that sits ontop of pyglet. > https://github.com/adamlwgriffiths/PyGLy > > > > My modern opengl knowledge is limited and I'm trying to find the best > > way to render meshes. The best example of what I'm working on > > optimising is my implementation of Wavefront OBJ meshes. > > > > My current implementation uses a single display list and simply makes > > opengl calls (glVertex3f, etc). > https://github.com/adamlwgriffiths/PyGLy/blob/master/pygly/mesh/obj_m... > > > > This works and is flexible, but the number of calls from python -> c/ > > opengl causes the load time to increase. > > My MD2 loader parses the MD2 file almost instantly, but pushing into > > OGL takes around 10 seconds using the same method as my OBJ > > implementation. > > > > It looks like the obvious optimisation would be to batch up the > > vertices into a VertexList / IndexedVertexList with the appropriate > > format specified and do a few pyglet / opengl calls rather than the > > hundreds that I'm doing currently. > > > > My problem comes with the usage of multiple groups of primitives > > within the 1 set of vertices. Ie, multiple tri fans would share > > vertices. > > I'm not sure how to create multiple lists of indices without > > duplicating the vertices. > > As most of the tri fan groups have only about 3 - 5 vertices, this > > would be a massive waste. > > > > Even better would be to use Pyglet's Batch, that way different index > > groups can use different textures, which I will have to do to support > > the OBJ format properly. > > > > So my questions are: > > Can I specify multiple groups of indices in an IndexedVertexList? If > > so, how? > > Can I do this with a Pyglet Batch object? If so, how? > > > > Hope my question makes sense. Apologise if this is an obvious > > question, but I'm very much 'example driven' and I'm having trouble > > finding one that matches my problem. > > Thanks for your time and help =) > > > > Cheers, > > Adam > > -- > 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]<javascript:;> > . > To unsubscribe from this group, send email to > [email protected] <javascript:;>. > For more options, visit this group at > http://groups.google.com/group/pyglet-users?hl=en. > > -- 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.
