Introduction
The majority of video games are ruled by physics in one way or another. 2D platformers require coded movement and jump physics. Shooters, both 2D and 3D, use ballistic calculators that vary in sophistication to calculate whether you shot that guy or missed him and he's still coming to get you. Even Pong used rudimentary physics to calculate the ball's trajectory after bouncing off of a paddle or wall. The next time you play a 3D shooter or action-adventure game, check whether or not you see the logo for Havok, a physics engine used in over 500 games since it was introduced in 2000. The point is that physics, however complex, is important in video games. GameMaker comes with its own engine that can be used to recreate physics-based sandbox games, such as The Incredible Machine, or even puzzle games, such as Cut the Rope or Angry Birds. Let's take a look at how elements of these games can be accomplished using GameMaker's built-in physics engine.
