使用OpenGL编程实现一个三维渲染三棱柱

以下是使用OpenGL编程实现一个三维渲染三棱柱的代码示例：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

def draw():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()
    gluLookAt(0, 0, 5, 0, 0, 0, 0, 1, 0)
    glBegin(GL_TRIANGLES)
    glColor3f(1, 0, 0)
    glVertex3f(-1, -1, 0)
    glVertex3f(1, -1, 0)
    glVertex3f(0, 1, 0)
    glColor3f(0, 1, 0)
    glVertex3f(-1, -1, 0)
    glVertex3f(0, -1, 1)
    glVertex3f(0, 1, 0)
    glColor3f(0, 0, 1)
    glVertex3f(1, -1, 0)
    glVertex3f(0, -1, 1)
    glVertex3f(0, 1, 0)
    glEnd()
    glutSwapBuffers()

glutInit()
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(400, 400)
glutCreateWindow("OpenGL 3D")
glutDisplayFunc(draw)
glEnable(GL_DEPTH_TEST)
glutMainLoop()

这段代码使用OpenGL绘制了一个三棱柱，其中gluLookAt()函数用于设置视角，glBegin()和glEnd()函数用于绘制三角形，glColor3f()函数用于设置颜色，glVertex3f()函数用于设置顶点坐标。