open3d加载的模型在pyqt5中显示代码

我可以回答这个问题。您可以使用pyqt5中的QOpenGLWidget来显示open3d加载的模型。具体实现可参考以下代码：

import open3d as o3d
from PyQt5.QtWidgets import QOpenGLWidget, QVBoxLayout, QApplication, QMainWindow, QWidget
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QSurfaceFormat

class Open3DWidget(QOpenGLWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.widget = QVBoxLayout()
        self.widget.setContentsMargins(0, 0, 0, 0)
        self.widget.setObjectName("Layout")
        self.widget.addWidget(self)
        self.initializeOpenGL()
        self.scene = None
        
    def initializeOpenGL(self):
        # OpenGL format
        format = QSurfaceFormat()
        format.setVersion(4, 0)
        format.setProfile(QSurfaceFormat.CoreProfile)
        format.setDepthBufferSize(24)
        format.setStencilBufferSize(8)
        format.setSamples(4)
        QSurfaceFormat.setDefaultFormat(format)
        
    def paintGL(self):
        o3d.io.RenderOption.background_color = [0.93, 0.93, 0.93]
        o3d.visualization.draw_geometries([self.scene],
                                           window_name='open3d',
                                           width=self.width(),
                                           height=self.height())
        
    def setScene(self, scene):
        self.scene = scene

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setGeometry(100, 100, 800, 600)
        self.central_widget = QWidget(self)
        self.setCentralWidget(self.central_widget)
        self.layout = QVBoxLayout(self.central_widget)
        
        # open3d
        mesh = o3d.io.read_triangle_mesh("mesh.ply")
        widget = Open3DWidget()
        widget.setScene(mesh)
        widget.setSizePolicy(QOpenGLWidget.Expanding, QOpenGLWidget.Expanding)
        widget.setMinimumSize(300, 300)
        self.layout.addWidget(widget)
        
if __name__ == '__main__':
    app = QApplication([])
    win = MainWindow()
    win.show()
    app.exec_()

希望能对你有所帮助。