pyopengl怎么添加材质

在 PyOpenGL 中，可以使用纹理来进行材质的添加。下面是一个简单的示例代码：

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

def load_texture(filename):
    texture_surface = pygame.image.load(filename)
    texture_data = pygame.image.tostring(texture_surface, 'RGBA', 1)
    width = texture_surface.get_width()
    height = texture_surface.get_height()

    texture_id = glGenTextures(1)
    glBindTexture(GL_TEXTURE_2D, texture_id)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture_data)
    return texture_id

def draw_cube(texture_id):
    glBegin(GL_QUADS)
    glTexCoord2f(0, 0)
    glVertex3f(-1, -1, 1)
    glTexCoord2f(1, 0)
    glVertex3f(1, -1, 1)
    glTexCoord2f(1, 1)
    glVertex3f(1, 1, 1)
    glTexCoord2f(0, 1)
    glVertex3f(-1, 1, 1)

    glTexCoord2f(1, 0)
    glVertex3f(-1, -1, -1)
    glTexCoord2f(1, 1)
    glVertex3f(-1, 1, -1)
    glTexCoord2f(0, 1)
    glVertex3f(1, 1, -1)
    glTexCoord2f(0, 0)
    glVertex3f(1, -1, -1)

    glTexCoord2f(0, 1)
    glVertex3f(-1, 1, -1)
    glTexCoord2f(0, 0)
    glVertex3f(-1, 1, 1)
    glTexCoord2f(1, 0)
    glVertex3f(1, 1, 1)
    glTexCoord2f(1, 1)
    glVertex3f(1, 1, -1)

    glTexCoord2f(1, 1)
    glVertex3f(-1, -1, -1)
    glTexCoord2f(0, 1)
    glVertex3f(1, -1, -1)
    glTexCoord2f(0, 0)
    glVertex3f(1, -1, 1)
    glTexCoord2f(1, 0)
    glVertex3f(-1, -1, 1)

    glTexCoord2f(1, 0)
    glVertex3f(1, -1, -1)
    glTexCoord2f(1, 1)
    glVertex3f(1, 1, -1)
    glTexCoord2f(0, 1)
    glVertex3f(1, 1, 1)
    glTexCoord2f(0, 0)
    glVertex3f(1, -1, 1)

    glTexCoord2f(0, 0)
    glVertex3f(-1, -1, -1)
    glTexCoord2f(1, 0)
    glVertex3f(-1, -1, 1)
    glTexCoord2f(1, 1)
    glVertex3f(-1, 1, 1)
    glTexCoord2f(0, 1)
    glVertex3f(-1, 1, -1)
    glEnd()

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

    glEnable(GL_DEPTH_TEST)
    glEnable(GL_TEXTURE_2D)

    texture_id = load_texture('texture.png')

    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)
        glLoadIdentity()
        gluPerspective(45, (display[0]/display[1]), 0.1, 50.0)
        glTranslatef(0, 0, -5)

        draw_cube(texture_id)

        pygame.display.flip()

if __name__ == '__main__':
    main()

这个示例代码中，我们首先使用 `load_texture` 函数载入一张纹理图片，并将其绑定到一个纹理对象上。在 `draw_cube` 函数中，我们使用 `glTexCoord2f` 函数来指定每个顶点的纹理坐标，然后在渲染时使用绑定的纹理对象来进行纹理贴图。