If we have n bodies in our simulation, the computational complexity of detecting collisions with pairwise tests is O( n 2), a number that makes computer scientists cringe. In the context of rigid body simulations, a collision happens when the shapes of two rigid bodies are intersecting, or when the distance between these shapes falls below a small tolerance. In the next, and final, installment, we’ll talk more about “solving” these collisions to eliminate interpenetrations.įor a review of the linear algebra concepts referred to in this article, you can refer to the linear algebra crash course in Part I. They should be coding cool stuff.In Part II, we will cover the collision detection step, which consists of finding pairs of bodies that are colliding among a possibly large number of bodies scattered around a 2D or 3D world. I mean seriously, coding smoke, accurate shadows and other nonsense seems pretty mundane. I support Nvidia because they support developers. I see AMD as the hardware vendor with a "me too" product, doing far less for the community as a whole from the initial creation of IP to the end, released product. Nvidia tends to lean more on driver optimization for their gains.Īt the end of the day, I see Nvidia as doing more for the developers and their bottom lines, that allow more time, effort, and money into the things that really matter to the game. AMD can't always get the full access they would like.
AMD relies on source code optimization for the best performance at launch and beyond. The source code availability is negotiated on a case by case basis with the developer.
Its one of those things that helps get games out quicker and inexpensively. Thing is, some developers are better or worse than others at using and implementing these tools. Nvidia's right there to offer a set a tools they can "drop in" and get those things.
Developers don't want to spend the time and money to create their own visual effects, like realistic cloth, smoke, hair, particle explosions, etc. It's "Gameworks" now more than just Physx.
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