python读取obj格式文件并画图

以下是Python代码，用于读取.obj格式文件并绘制图形：

import matplotlib.pyplot as plt
import numpy as np

def read_obj_file(file_path):
    """
    读取.obj格式文件
    :param file_path: 文件路径
    :return: 顶点坐标和面片
    """
    vertices = []
    faces = []
    with open(file_path, "r") as f:
        for line in f:
            if line.startswith("v "):
                vertex = line.strip().split()[1:]
                vertex = list(map(float, vertex))
                vertices.append(vertex)
            elif line.startswith("f "):
                face = line.strip().split()[1:]
                face = [int(i.split("/")[0]) for i in face]
                faces.append(face)
    return np.array(vertices), np.array(faces)

def plot_mesh(vertices, faces):
    """
    绘制网格模型
    :param vertices: 顶点坐标
    :param faces: 面片
    """
    fig = plt.figure()
    ax = fig.add_subplot(projection='3d')
    ax.plot_trisurf(vertices[:, 0], vertices[:, 1], vertices[:, 2], triangles=faces-1)
    plt.show()

if __name__ == '__main__':
    vertices, faces = read_obj_file("example.obj")
    plot_mesh(vertices, faces)

该代码将读取一个.obj格式的文件，并将其呈现为三维网格模型。要使用此代码，请将文件路径更改为您自己的.obj文件路径。