Ball Project ------------ by Marcel Germann and David Spuhler This project simulates two balls in a box. You can rotate the box and the gravity changes accordingly. Physics: The balls are spring mass systems. We make collision detection between the balls and the wall and also between the two balls. There is also a fraction between the balls and the wall to get rotations, when they hit the wall in an angle which is not 90 degrees. The project is built only with OpenGL and C++. No game engine is used.