使用Pygame + PyOpenGL，绘制到曲面而不是直接绘制到显示器？

import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *

pygame.init()
display = (800, 600)
pygame.display.set_mode(display, DOUBLEBUF | OPENGL)
gluPerspective(45, (display[0] / display[1]), 0.1, 50.0)
glTranslatef(0.0, 0.0, -5)

def create_surface():
    vertices = (
        (1, -1, -1),
        (1, 1, -1),
        (-1, 1, -1),
        (-1, -1, -1),
        (1, -1, 1),
        (1, 1, 1),
        (-1, -1, 1),
        (-1, 1, 1)
    )
    edges = (
        (0, 1),
        (1, 2),
        (2, 3),
        (3, 0),
        (4, 5),
        (5, 6),
        (6, 7),
        (7, 4),
        (0, 4),
        (1, 5),
        (2, 6),
        (3, 7)
    )
    surfaces = (
        (0, 1, 2, 3),
        (3, 2, 7, 6),
        (6, 7, 5, 4),
        (4, 5, 1, 0),
        (1, 5, 7, 2),
        (4, 0, 3, 6)
    )
    colors = (
        (1, 0, 0),
        (0, 1, 0),
        (0, 0, 1),
        (1, 1, 0),
        (1, 0, 1),
        (0, 1, 1)
    )
    return vertices, edges, surfaces, colors

def draw_surface(vertices, edges, surfaces, colors):
    glBegin(GL_QUADS)
    for surface in surfaces:
        for vertex in surface:
            glColor3fv(colors[surfaces.index(surface)])
            glVertex3fv(vertices[vertex])
    glEnd()

    glBegin(GL_LINES)
    for edge in edges:
        for vertex in edge:
            glVertex3fv(vertices[vertex])
    glEnd()

def main():
    vertices, edges, surfaces, colors = create_surface()

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()

        glRotatef(1, 3, 1, 1)
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        draw_surface(vertices, edges, surfaces, colors)
        pygame.display.flip()
        pygame.time.wait(10)

main()