pyqt如何开启openGL渲染

使用PyQt开启OpenGL渲染的步骤如下：

1.引入OpenGL的相关库和PyQt的相关库：

from PyQt5.QtWidgets import QOpenGLWidget
from PyQt5.QtGui import QPainter, QOpenGLFramebufferObject
from PyQt5.QtOpenGL import QGLFormat
from OpenGL.GL import *

2.创建一个继承自QOpenGLWidget的OpenGL窗口类，并初始化OpenGL的Context：

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

        # 初始化OpenGL
        fmt = QGLFormat()
        fmt.setVersion(3, 3)
        fmt.setProfile(QGLFormat.CoreProfile)
        self.setFormat(fmt)
        self.gl = None
        self.init()

    def initializeGL(self):
        self.gl = self.context().versionFunctions()
        self.gl.glClearColor(1.0, 1.0, 1.0, 1.0)
        self.gl.glEnable(GL_DEPTH_TEST)

3. 实现渲染函数paintGL()，在其中使用OpenGL绘制场景：

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

    # Use OpenGL to render the scene
    self.gl.glBegin(GL_TRIANGLES)
    self.gl.glColor3f(1.0, 0.0, 0.0)
    self.gl.glVertex3f(-1.0, -1.0, -5.0)
    self.gl.glColor3f(0.0, 1.0, 0.0)
    self.gl.glVertex3f(1.0, -1.0, -5.0)
    self.gl.glColor3f(0.0, 0.0, 1.0)
    self.gl.glVertex3f(0.0, 1.0, -5.0)
    self.gl.glEnd()

4. 在主程序中创建OpenGL窗口并显示：

if __name__ == '__main__':
    app = QApplication(sys.argv)
    gl_widget = GLWindow()
    gl_widget.show()
    sys.exit(app.exec_())

完整代码示例：

import sys
from PyQt5.QtWidgets import QOpenGLWidget, QApplication
from PyQt5.QtGui import QPainter, QOpenGLFramebufferObject
from PyQt5.QtOpenGL import QGLFormat
from OpenGL.GL import *


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

        # Initialize OpenGL
        fmt = QGLFormat()
        fmt.setVersion(3, 3)
        fmt.setProfile(QGLFormat.CoreProfile)
        self.setFormat(fmt)
        self.gl = None
        self.init()

    def initializeGL(self):
        self.gl = self.context().versionFunctions()
        self.gl.glClearColor(1.0, 1.0, 1.0, 1.0)
        self.gl.glEnable(GL_DEPTH_TEST)

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

        # Use OpenGL to render the scene
        self.gl.glBegin(GL_TRIANGLES)
        self.gl.glColor3f(1.0, 0.0, 0.0)
        self.gl.glVertex3f(-1.0, -1.0, -5.0)
        self.gl.glColor3f(0.0, 1.0, 0.0)
        self.gl.glVertex3f(1.0, -1.0, -5.0)
        self.gl.glColor3f(0.0, 0.0, 1.0)
        self.gl.glVertex3f(0.0, 1.0, -5.0)
        self.gl.glEnd()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    gl_widget = GLWindow()
    gl_widget.show()
    sys.exit(app.exec_())