Python Program:

Using our graphics module below, draw a rectangle and a circle inside the rectangle. Now have the circle move inside the rectangle. If the circle touches the wall of the rectangle, it should bounce off the wall in the appropriate direction.

#HELPER FUNCTION TO DRAW ELLIPSE def ellipse(centerPoint, xradius, yradius, ang=pi, Nb=100):  '''ra - major axis length  rb - minor axis length  ang - angle  x0,y0 - position of center of ellipse  Nb - No. of points that make an ellipse   based on matlab code ellipse.m written by D.G. Long,  Brigham Young University, based on the  CIRCLES.m original  written by Peter Blattner, Institute of Microtechnology,  University of  Neuchatel, Switzerland, blattner@imt.unine.ch  '''  if xradius >= yradius:  ra = max(xradius * 2, yradius * 2) rb = min(xradius * 2, yradius * 2) else:  ra = min(xradius * 2, yradius * 2) rb = max(xradius * 2, yradius * 2) x0 = centerPoint.X y0 = centerPoint.Y xpos, ypos = x0, y0 radm, radn = ra, rb an = ang   co, si = cos(an), sin(an) the = linspace(0, 2 * pi, Nb) X = radm * cos(the) * co - si * radn * sin(the) + xpos Y = radm * cos(the) * si + co * radn * sin(the) + ypos return X, Y