Re: FW: Missing functions on MacOSX?

On 13-12-12 06:52 AM, Robert Kent wrote:
> Hi Guys,
>
> Further to my previous email, I have now re-installed PyOpenGL and can
> call the glInitDrawInstanced* functions for ARB and EXT without them seg
> faulting but they both return False. Is it a case of importing the correct
> modules to get ARB/EXT methods initialised and if so, which modules? Any
> thoughts or advice would be greatly appreciated.
I've attached a module that, using GLUT as the host, prints out which of 
the various alternates is available.  The glInit* functions aren't 
really necessary with modern PyOpenGL, they should still work, but they 
just do an "is this extension in glGetString( GL_EXTENSIONS )" test.  
The sample also shows how to create an OpenGL.extensions.alternate that 
will call the first of the functions available on the machine.

Hope that helps,
Mike

-- 
________________________________________________
   Mike C. Fletcher
   Designer, VR Plumber, Coder
   http://www.vrplumber.com
   http://blog.vrplumber.com

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from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.extensions import alternate
from OpenGL.GL.ARB.draw_instanced import *
from OpenGL.GL.EXT.draw_instanced import *
from OpenGL.GL.NV.draw_instanced import *
import time

def detect():
    glutInit([])
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
    glutInitWindowSize(200,200)

    window = glutCreateWindow("Detection")
    
    functions = (
        glDrawArraysInstanced, 
        glDrawArraysInstancedARB, 
        glDrawArraysInstancedEXT,
        glDrawArraysInstancedNV,
    )
    
    for function in functions:
        print function.__name__, bool(function)
    
    any = alternate( *functions )
    
    print any, bool(any)
    

if __name__ == "__main__":
    detect()