pyqt 使用openglwidget导入obj模型

可以使用 PyOpenGL 库来加载和渲染 OBJ 模型，然后将其嵌入到 PyQt 的 OpenGLWidget 中。以下是一个简单的示例代码：

from PyQt5.QtWidgets import QApplication, QMainWindow, QOpenGLWidget
from PyQt5.QtGui import QOpenGLShader, QOpenGLShaderProgram
from PyQt5.QtCore import QFile, QTextStream
from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *
import sys

class MyGLWidget(QOpenGLWidget):
    def __init__(self, parent=None):
        super(MyGLWidget, self).__init__(parent)

    def initializeGL(self):
        glClearColor(0.0, 0.0, 0.0, 1.0)
        glEnable(GL_DEPTH_TEST)
        glEnable(GL_LIGHTING)
        glEnable(GL_LIGHT0)

        self.loadObj('model.obj')

    def paintGL(self):
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)

        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()
        gluLookAt(0, 0, 5, 0, 0, 0, 0, 1, 0)

        glPushMatrix()
        glRotatef(30, 1, 0, 0)
        glRotatef(60, 0, 1, 0)
        glCallList(self.obj.gl_list)
        glPopMatrix()

    def resizeGL(self, w, h):
        glViewport(0, 0, w, h)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        gluPerspective(45.0, w / h, 0.1, 100.0)

    def loadObj(self, filename):
        self.obj = OBJ(filename, swapyz=True)

class OBJ:
    def __init__(self, filename, swapyz=False):
        self.vertices = []
        self.normals = []
        self.texcoords = []
        self.faces = []

        material = None
        for line in open(filename, "r"):
            if line.startswith('#'): continue
            values = line.split()
            if not values: continue
            if values[0] == 'v':
                v = list(map(float, values[1:4]))
                if swapyz:
                    v = [v[0], v[2], -v[1]]
                self.vertices.append(v)
            elif values[0] == 'vn':
                v = list(map(float, values[1:4]))
                if swapyz:
                    v = [v[0], v[2], -v[1]]
                self.normals.append(v)
            elif values[0] == 'vt':
                self.texcoords.append(list(map(float, values[1:3])))
            elif values[0] in ('usemtl', 'usemat'):
                material = values[1]
            elif values[0] == 'f':
                face = []
                texcoords = []
                norms = []
                for v in values[1:]:
                    w = v.split('/')
                    face.append(int(w[0]))
                    if len(w) >= 2 and len(w[1]) > 0:
                        texcoords.append(int(w[1]))
                    else:
                        texcoords.append(0)
                    if len(w) >= 3 and len(w[2]) > 0:
                        norms.append(int(w[2]))
                    else:
                        norms.append(0)
                self.faces.append((face, norms, texcoords, material))

        self.gl_list = glGenLists(1)
        glNewList(self.gl_list, GL_COMPILE)
        glEnable(GL_TEXTURE_2D)
        glFrontFace(GL_CCW)
        for face in self.faces:
            vertices, normals, texture_coords, material = face

            if material is not None:
                # TODO: use materials
                pass

            glBegin(GL_POLYGON)
            for i in range(len(vertices)):
                if normals[i] > 0:
                    glNormal3fv(self.normals[normals[i] - 1])
                if texture_coords[i] > 0:
                    glTexCoord2fv(self.texcoords[texture_coords[i] - 1])
                glVertex3fv(self.vertices[vertices[i] - 1])
            glEnd()
        glDisable(GL_TEXTURE_2D)
        glEndList()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = QMainWindow()
    widget = MyGLWidget(window)
    window.setCentralWidget(widget)
    window.resize(640, 480)
    window.show()
    sys.exit(app.exec_())

这个例子使用 PyOpenGL 加载和渲染 OBJ 模型，并将其嵌入到 PyQt 的 OpenGLWidget 中。你可以将 `loadObj` 函数中的 `filename` 参数替换为你要加载的 OBJ 模型的文件名。