![]() ![]() In this tutorial series on physics in games, we’ll explore rigid body physics simulation, starting with simple rigid body motion in this article, and then covering interactions among bodies through collisions and constraints in the following installments. A few other games require the simulation of more complicated entities though, such as deformable bodies, fluids, magnetic objects, etc. That’s because most of the objects we interact with in real life are fairly rigid, and simulating rigid bodies is relatively simple (although as we will see, that doesn’t mean it’s a cakewalk). Rigid body dynamics – the movement and interaction of solid, inflexible objects – is by far the most popular kind of effect simulated in games. In any game, only certain physical effects are of interest. ![]() A physics simulation game thus requires a stable simulation that will not break or slow down, and this is usually not trivial to achieve. Many games rely entirely on the physics simulation to be fun. Simulating physics in video games is very common, since most games are inspired by things we have in the real world. We can simulate things like astrophysics, relativity, and lots of other insane stuff we are able to observe in among the wonders of nature. It is also an essential tool in civil and automotive engineering, illuminating how certain structures would behave in events like an earthquake or a car crash. The earliest computers were already being used to perform physics simulations – for example, to predict the ballistic motion of projectiles in the military. The range of applications of physics simulations is enormous. ![]()
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