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. That means these games require 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.
This allows us, as advanced game developers, to predict and carefully analyze how something would behave before actually building it, which is almost always simpler and cheaper to do. In general, these simulations apply numerical methods to existing theories to obtain results that are as close as possible to what we observe in the real world. Physics simulation is a field within computer science that aims to reproduce physical phenomena using a computer. Part III: Constrained Rigid Body Simulation Part II: Collision Detection for Solid Objects
PHYSICUS PC GAME WALKTHROUGH SERIES
This is Part I of our three-part series on video game physics.
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