> In the case of physics engines, they are flawed by > design in order to compromise accuracy for performance. This is an odd definition of "flaw" to me. I

> In the case of physics engines, they are flawed by > design in order to compromise accuracy for performance. This is an odd definition of "flaw" to me. I would call it a design choice, compromising accuracy over speed, which we're forced to do always, since we don't have infinite compute power. Would you call H.264 video and MP3 audio flawed by design because they prioritize bandwidth reduction over lossless reproduction? > The glitches don't appear magically out of the spec language, > they are an inevitable result of the discrete nature of > realtime physics simulations. You seem to be arguing both that glitches in physics engines are inevitable, and that they're a design choice (sacrificing precision over speed).