闭合体和扫描体是计算机图形学中常用的概念，用于描述三维物体的表面和体积。下面是一个使用Python和OpenGL库实现闭合体和扫描体的示例代码：

1. 导入必要的库：

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

2. 定义一个函数来绘制闭合体：

def draw_closed_body():
    glBegin(GL_QUADS)
    glVertex3f(-1, -1, 1)
    glVertex3f(1, -1, 1)
    glVertex3f(1, 1, 1)
    glVertex3f(-1, 1, 1)

    glVertex3f(-1, -1, -1)
    glVertex3f(-1, 1, -1)
    glVertex3f(1, 1, -1)
    glVertex3f(1, -1, -1)

    glVertex3f(-1, 1, -1)
    glVertex3f(-1, 1, 1)
    glVertex3f(1, 1, 1)
    glVertex3f(1, 1, -1)

    glVertex3f(-1, -1, -1)
    glVertex3f(1, -1, -1)
    glVertex3f(1, -1, 1)
    glVertex3f(-1, -1, 1)

    glVertex3f(1, -1, -1)
    glVertex3f(1, 1, -1)
    glVertex3f(1, 1, 1)
    glVertex3f(1, -1, 1)

    glVertex3f(-1, -1, -1)
    glVertex3f(-1, -1, 1)
    glVertex3f(-1, 1, 1)
    glVertex3f(-1, 1, -1)
    glEnd()

3. 定义一个函数来绘制扫描体：

def draw_scan_body():
    glBegin(GL_QUADS)
    glVertex3f(-1, -1, -1)
    glVertex3f(1, -1, -1)
    glVertex3f(1, -1, 1)
    glVertex3f(-1, -1, 1)
    glEnd()

4. 定义OpenGL的回调函数：

def draw():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()
    gluLookAt(0, 0, 5, 0, 0, 0, 0, 1, 0)
    
    glColor3f(1, 0, 0)  # 设置颜色为红色
    draw_closed_body()  # 绘制闭合体

    glColor3f(0, 1, 0)  # 设置颜色为绿色
    draw_scan_body()  # 绘制扫描体

    glFlush()
    glutSwapBuffers()

5. 定义程序入口和初始化函数：

def main():
    glutInit()
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH)
    glutInitWindowSize(400, 400)
    glutCreateWindow(b"Closed Body and Scan Body")
    glEnable(GL_DEPTH_TEST)
    glutDisplayFunc(draw)
    glutMainLoop()

if __name__ == "__main__":
    main()

运行以上代码，将会绘制一个红色的闭合体和一个绿色的扫描体。这只是一个简单的示例，你可以根据实际需求修改代码来绘制更复杂的闭合体和扫描体。