python openGl如何导入obj模型

要在Python中使用OpenGL导入OBJ模型，可以使用PyOpenGL库。可以使用以下代码导入OBJ模型：

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

def load_obj(filename):
    vertices = []
    normals = []
    texcoords = []
    faces = []

    for line in open(filename, "r"):
        if line.startswith('#'): continue
        values = line.split()
        if not values: continue
        if values[0] == 'v':
            vertices.append(map(float, values[1:4]))
        elif values[0] == 'vn':
            normals.append(map(float, values[1:4]))
        elif values[0] == 'vt':
            texcoords.append(map(float, values[1:3]))
        elif values[0] == 'f':
            face = []
            texcoords_idx = []
            norms_idx = []
            for v in values[1:]:
                w = v.split('/')
                face.append(int(w[0]))
                if len(w) >= 2 and len(w[1]) > 0:
                    texcoords_idx.append(int(w[1]))
                else:
                    texcoords_idx.append(0)
                if len(w) >= 3 and len(w[2]) > 0:
                    norms_idx.append(int(w[2]))
                else:
                    norms_idx.append(0)
            faces.append((face, norms_idx, texcoords_idx))

    return vertices, normals, texcoords, faces

def draw_obj(vertices, normals, texcoords, faces):
    glBegin(GL_TRIANGLES)
    for face in faces:
        for i in range(3):
            if normals:
                glNormal3fv(normals[face[1][i] - 1])
            if texcoords:
                glTexCoord2fv(texcoords[face[2][i] - 1])
            glVertex3fv(vertices[face[0][i] - 1])
    glEnd()

def main():
    pygame.init()
    display = (800, 600)
    pygame.display.set_mode(display, pygame.DOUBLEBUF | pygame.OPENGL)

    gluPerspective(45, (display[0] / display[1]), 0.1, 50.0)

    glTranslatef(0.0, 0.0, -5)

    vertices, normals, texcoords, faces = load_obj("model.obj")

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

        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)

        draw_obj(vertices, normals, texcoords, faces)

        pygame.display.flip()
        pygame.time.wait(10)

main()

这段代码使用Pygame和PyOpenGL库来加载和渲染OBJ模型。它首先定义了一个load_obj函数，该函数从OBJ文件中读取顶点、法线、纹理坐标和面数据。然后，它定义了一个draw_obj函数，该函数使用OpenGL绘制OBJ模型。最后，它使用Pygame创建一个窗口，并在窗口中渲染OBJ模型。