交互控制平面，平面可移动，显示平面一侧的三角网格模型代码实现

这是一个简单的交互控制平面，允许用户通过鼠标拖动平面并在显示平面的一侧绘制三角形网格模型。这里提供基于Python和OpenGL的代码实现。

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

vertices = (
    (1, -1, 0),
    (1, 1, 0),
    (-1, 1, 0),
    (-1, -1, 0),
    (0, 0, 1)
)

edges = (
    (0, 1),
    (0, 3),
    (0, 4),
    (1, 4),
    (1, 2),
    (2, 4),
    (2, 3),
    (3, 4)
)

triangles = []

def draw_triangle():
    glBegin(GL_TRIANGLES)
    for triangle in triangles:
        for vertex in triangle:
            glVertex3fv(vertices[vertex])
    glEnd()

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

def main():
    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)

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            elif event.type == pygame.MOUSEBUTTONDOWN:
                x, y = event.pos
                viewport = glGetIntegerv(GL_VIEWPORT)
                winX = x
                winY = viewport[3] - y
                winZ = glReadPixels(winX, winY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT)
                modelview = glGetDoublev(GL_MODELVIEW_MATRIX)
                projection = glGetDoublev(GL_PROJECTION_MATRIX)
                realX, realY, realZ = gluUnProject(winX, winY, winZ, modelview, projection, viewport)
                triangles.append([len(vertices)-1, len(vertices), len(vertices)+1])
                vertices.append((realX, realY, realZ))

        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
        draw_triangle()
        draw_plane()
        pygame.display.flip()
        pygame.time.wait(10)

if __name__ == '__main__':
    main()

要运行此代码，您需要安装以下库：

- Pygame
- PyOpenGL

在代码运行后，您可以使用鼠标拖动平面并在显示平面的一侧绘制三角形网格模型。