code: def setup_viewport():
      global SizeOfBox
      gl.glMatrixMode(gl.GL_PROJECTION)
      gl.glLoadIdentity()
      gl.glOrtho(
          -SizeOfBox,
          SizeOfBox,
          -SizeOfBox,
          SizeOfBox,
          -SizeOfBox,
          SizeOfBox,
      )
      glut.glutPostRedisplay()
  
file_path: pyopencl/examples/n-body.py
imports: import getopt
  import sys
  import time
  import numpy
  import pyopencl
  import pyopencl.array
  from numpy.random import randint
label_desc: Use image node_id 7 for calling a global function with example usage: setup_viewport() without return types