functions in glfunc.i -

             gl_always_show_obj(flag)  
 
    Draw objects while rotating if flag is non-zero.  

             cage_style3d(style)  
 
    If style is zero, the limits for the "cage" surrounding the  
    "interesting" data volume will be the bounds of all  
    objects in the scene.  
    See also: cage_limits3d, getcage_limits3d  

             ClearList3d  
 
    Clear both 3D display lists.  

             Draw3d  
 
    Draw both 3D display lists, handling all preparation and clean-up.  

             endtex3d(void)  
 
    finish using a 3D texture.  

             get_currwin3d()  
 
	Return the number of the current 3D window.  

             get_fov3d  
 
    Returns the field of view (in degrees) for the current 3D window.  

             get_hite3d(void)  
 
    return the height of the current OpenGL window in pixels.  

             get_width3d(void)  
 
    return the width of the current OpenGL window in pixels.  

             GetBounds3d  
 
    Compute the bounding box for all 3D objects.  
    Function returns non-zero if there is at least one object.  

             getGLvers  
 
    Get the version number for OpenGL.  

             has_tex3d()  
 
    result is non-zero if 3D textures are supported.  

             has_texcube3d()  
 
    result is non-zero if cube map textures are supported.  

             inc_seq3d(void)  
 
    increment the OpenGL sequence number. Not a user routine.  

             line_width3d(void)  
 
    Set the width in pixels for a polyline in OpenGL.  

             mousefunc3d(val)  
 
    controls the efect of mouse motion in an OpenGL window.  
    val==1 means rotate, val==2 means zoom, and val==3 means pan.  

             msmov_val3d(void)  
 
    set the number of pixels the mouse must move before  
    the model should be rotated.  

             out_ccw3d(dir_flag)  
 
    set the direction (zero for clockwise, else CCW) for the  
    front face of polygons.  

             preptex3d(void)  
 
    prepare an OpenGL state suitable for the use of 3D textures.  

             set_fov3d(fov)  
 
    Set the field of view (in degrees) for the current 3D window.  

             update_list3d(void)  
 
    update an existing OpenGL display list.  

             use_array3d(flag)  
 
    Use OpenGL arrays if flag is non-zero.  

             use_list3d(flag)  
 
    Use an OpenGL display list if flag is non-zero.  

             win3d(num, width, height)  
 
    Create OpenGL output window number num.  
    Window will have specified width and height (in pixels).  

             winkill3d(num)  
 
    Close OpenGL output window number num.