Hi, So, first of all - apologies for the lack of incrementation in my last message, was horrible to read - new webmail systems seem to forget about plain text limitations...
I figured out a workaround by not creating any GL_ARRAY_BUFFER but working directly with the original data array (represented by a bgl.Buffer) in the bgl.glVertexAttribPointer function. I don't know yet what this means in terms of performance compared to the buffered version, will have to benchmark. So for now the showstopper is solved and I am able to continue working on my project. *But* still in current bgl implementation there's a whole family of functions which do not completely offer matching possibilities with their C counterparts: glBitmap glColorPointer glCompressedTexImage1D glCompressedTexImage2D glCompressedTexImage3D glCompressedTexSubImage1D glCompressedTexSubImage2D glCompressedTexSubImage3D glDrawPixels glEdgeFlagPointer glGetPointerv glGetVertexAttribPointerv glIndexPointer glNormalPointer glPolygonStipple glReadPixels glTexCoordPointer glTexImage1D glTexImage2D glTexImage3D glTexSubImage1D glTexSubImage2D glTexSubImage3D glVertexAttribPointer glVertexPointer (Note that 1) I could have forgotten some and 2) there could be more OpenGL functions concerned but that are currently not wrapped in bgl.) All those functions share the particularity that, in case of non-0 buffer bound in some place - typically GL_ARRAY_BUFFER, GL_PIXEL_UNPACK_BUFFER, etc. - the meaning of their pointer argument changes from an absolute pointer to an offset pointer (you can search for text "is treated as a byte offset into the buffer object's data store" on site www.opengl.org/sdk/docs/man2/xhtml). Currently, bgl only supports the "absolute pointer" functionality, because of it's lack of translating integer offsets rather than buffers/arrays. This is probably something that could be addressed. For now on I will rather continue working with what already does the job for me (provided that performance stays equivalently good). If I've got some time later I will look further into this. Thanks, Quentin Wenger _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
