The freeglut library is used to create the game window, establish the game loop and control user input.For space reasons, we are not going to look closely at the code needed to render the 3D scene or establish the game loop in this game, but here is an overview of the components used: This article will focus on Havok Physics usage, but the small game we are about to develop also requires some graphics capabilities and some user input control loop. Physical simulation is just one of the several components needed when building complex 3D games: graphics, user input and sound are also very important topics. A small Visual Studio 2010 project for this game can be downloaded from here, the archive contains all the code we are going to explain in this article.
In this article we'll learn how to build a very simple physics-based game using Havok Physics. While Havok is not the only company providing physics simulation capabilities to game developers, the Havok Physics engine is surely one of the most appreciated in the AAA market. Those titles rely on the services of the Havok Physics engine to move those objects in a physical way. Physics is a crucial part of almost any modern 3D game, think about how objects move in a physically plausible way in The Elders Scrolls V: Skyrim (Bethesda Softworks) when you cast a spell on a pile of objects, or how buildings can be destroyed using rocket launchers or tanks in Battlefield 3 (EA DICE). The article has also been published on Game Coder Magazine Physics some weeks ago. Here is an article describing how to build a simple 3D physics-based game using Havok 2011.3.
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