Proof of concept OpenGL program in python and Qt/PySide

Here is the output of my initial test program:




I am planning to test the performance of various ways of rendering lots of spheres using OpenGL. I will use python and Qt to run the tests. As a first step, I have created a very light hello program that renders the classic Utah teapot.

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#!/usr/bin/python   # File teapot_test.py # "hello world" type rendering of the classic Utah teapot # Requires python modules PySide and PyOpenGL   from PySide.QtGui import QMainWindow, QApplication from PySide.QtOpenGL import QGLWidget from OpenGL.GL import * from OpenGL.GLUT import * from OpenGL.GLU import * import sys     def override(interface_class):   """   Method to implement Java-like derived class method override annotation.   Courtesy of mkorpela's answer at   http://stackoverflow.com/questions/1167617/in-python-how-do-i-indicate-im-overriding-a-method   """   def override(method):       assert(method.__name__ in dir(interface_class))       return method   return override     class SphereTestGLWidget(QGLWidget):   "GUI rectangle that displays a teapot"   @override(QGLWidget)   def initializeGL(self):       "runs once, after OpenGL context is created"       glEnable(GL_DEPTH_TEST)       glClearColor(1,1,1,0) # white background       glShadeModel(GL_SMOOTH)       glEnable(GL_COLOR_MATERIAL)       glMaterialfv(GL_FRONT, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])       glMaterialfv(GL_FRONT, GL_SHININESS, [50.0])       glLightfv(GL_LIGHT0, GL_POSITION, [1.0, 1.0, 1.0, 0.0])       glLightfv(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])       glLightfv(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])       glLightModelfv(GL_LIGHT_MODEL_AMBIENT, [1.0, 1.0, 1.0, 0.0])       glEnable(GL_LIGHTING)       glEnable(GL_LIGHT0)       self.orientCamera()       gluLookAt(0, 0, -10, # camera                 0, 0, 0, # focus                 0, 1, 0) # up vector         @override(QGLWidget)   def paintGL(self):       "runs every time an image update is needed"       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)       self.paintTeapot()         @override(QGLWidget)   def resizeGL(self, w, h):       "runs every time the window changes size"       glViewport(0, 0, w, h)       self.orientCamera()         def orientCamera(self):       "update projection matrix, especially when aspect ratio changes"       glPushAttrib(GL_TRANSFORM_BIT) # remember current GL_MATRIX_MODE       glMatrixMode(GL_PROJECTION)       glLoadIdentity()       gluPerspective (60.0, self.width()/float(self.height()), 1.0, 10.0)       glPopAttrib() # restore GL_MATRIX_MODE         def paintTeapot(self):       glPushAttrib(GL_POLYGON_BIT) # remember current GL_FRONT_FACE indictor       glFrontFace(GL_CW) # teapot polygon vertex order is opposite to modern convention       glColor3f(0.2,0.2,0.5) # paint it blue       glutSolidTeapot(3.0) # thank you GLUT tool kit       glPopAttrib() # restore GL_FRONT_FACE     class SphereTestApp(QApplication):   "Simple application for testing OpenGL rendering"   def __init__(self):       QApplication.__init__(self, sys.argv)       self.setApplicationName("SphereTest")       self.mainWindow = QMainWindow()       self.gl_widget = SphereTestGLWidget()       self.mainWindow.setCentralWidget(self.gl_widget)       self.mainWindow.resize(1024, 768)       self.mainWindow.show()       sys.exit(self.exec_()) # Start Qt main loop     if __name__ == "__main__":   SphereTestApp()