NumPy : Beginner's Guide - Third Edition

Time for Action – drawing the Sierpinski gasket

For the purpose of demonstration, we will draw a Sierpinski gasket, also known as Sierpinski triangle or Sierpinski Sieve with OpenGL. This is a fractal pattern in the shape of a triangle created by the mathematician Waclaw Sierpinski. The triangle is obtained via a recursive and, in principle infinite procedure.

1. First, start out by initializing some of the OpenGL related primitives. This includes setting the display mode and background color. A line-by-line explanation is given at the end of this section:

   def display_openGL(w, h): pygame.display.set_mode((w,h), pygame.OPENGL|pygame.DOUBLEBUF) glClearColor(0.0, 0.0, 0.0, 1.0) glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT) gluOrtho2D(0, w, 0, h) ...