Introduction Hi, I’m Glenn Fiedler. Welcome to Virtual Go, my project to create a physically accurate computer simulation of a Go board and stones. In previous articles we mathematically defined the shape of a go stone and tessellated its shape so it can be drawn with 3D graphics hardware. Now we want to make the go stone move, obeying Newton’s laws of motion so the simulation is physically accurate. The stone should be accelerated by gravity and fall downwards.| Gaffer On Games