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gl.gl_xxx → gl.xx, GL.GL_XXX → GL.XXX

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  gl.gl_xxx → gl.xx, GL.GL_XXX → GL.XXX Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-13 05:37 +0000

#197802 — gl.gl_xxx → gl.xx, GL.GL_XXX → GL.XXX

import types
import OpenGL
import OpenGL.GL
import OpenGL.GLU

def gen_gl() :
    # Funny thing: the OpenGL specs document all routines and
    # constants *without* “gl” and “GL_” prefixes. It makes
    # sense to add these in a language that does not have
    # namespaces, like C. In Python, it does not. So this
    # routine takes apart the contents of the PyOpenGL modules
    # into separate pieces, with those unnecessary prefixes
    # stripped. So instead  of calling OpenGL.GL.glClear(), say,
    # you can call gl.Clear(). And instead of referring to
    # OpenGL.GL.GL_ACCUM, you can use GL.ACCUM instead.
    # Much more concise all round.
    gl = types.ModuleType("gl", doc = "OpenGL routines")
    GL = types.ModuleType("GL", doc = "OpenGL constants")
    glu = types.ModuleType("glu", doc = "OpenGL utility routines")
    GLU = types.ModuleType("GLU", doc = "OpenGL utility constants")
    for prefix, src, dest in \
        (
            ("gl", OpenGL.GL, gl),
            ("GL_", OpenGL.GL, GL),
            ("glu", OpenGL.GLU, glu),
            ("GLU_", OpenGL.GLU, GLU),
        ) \
    :
        for name in dir(src) :
            if name.startswith(prefix) :
                setattr(dest, name[len(prefix):], getattr(src, name))
            #end if
        #end for
    #end for
    return \
        gl, GL, glu, GLU
#end gen_gl
gl, GL, glu, GLU = gen_gl()
del gen_gl # your work is done

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