Ragdoll and cloth physics - Printable Version
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Ragdoll and cloth physics - Skorche - Jun 3, 2003 10:06 AM
I've been trying to make a physics system that would allow soft and rigid body simulation. It's mostly been done using a lot of geometry and trig, with a algorithm for every plasible type of collision and movement.
I've made it way too complicated every time and have never made anything working. I keep thinking that there should be a simpler way, after all it's only an approximation.
Does anyone have some simple example that they have made? Like a simple chain hanging from a ceiling? A link maybe to a site that has this kind of information.
Ragdoll and cloth physics - Dr. Light - Jun 3, 2003 10:13 AM
One point connected to another point? Wouldn't you just start with the affected point, then work outward with a simple formula to figure the angle/velocity relative to the first point and second point?
I'm just guessing/thinking.
Ragdoll and cloth physics - Skorche - Jun 3, 2003 10:59 AM
Well that's what I tried, but it get's really complicated when you realize that one point moving affects all the others in the system. That's what I mean when I said that an approach using just simple geometry doesn't really work very good.
Ragdoll and cloth physics - Mark Levin - Jun 3, 2003 10:59 AM
There's an article on Gamasutra about Verlet particle systems that may be what you're looking for. I don't have the link handy, but it's called something like "Advanced Character Physics".
Ragdoll and cloth physics - Tycho - Jun 3, 2003 11:00 AM
Free membership required, but you won't regret it.
Ragdoll and cloth physics - Dr. Light - Jun 3, 2003 11:05 AM
I mean work outward from that point, using the same formula for each new set of directly connected points.
Still complicated as far as sorting them though.
Ragdoll and cloth physics - sealfin - Jun 3, 2003 11:28 AM
NeHe has a tutorial on rope physics, if that's of any helpÖ
Ragdoll and cloth physics - OneSadCookie - Jun 3, 2003 01:22 PM
I highly recommend the Gamasutra article.
I have a C implementation of some of the things in the article, if anyone's interested. My email's in my profile.
Ragdoll and cloth physics - AJ Infinity - Jun 3, 2003 02:45 PM
get the book Physics for Game Developers also. Also check out the Havok physics engine. (one of the best on the market.)
Ragdoll and cloth physics - OneSadCookie - Jun 3, 2003 03:02 PM
I seem to recall that the general concensus was that the physics for game developers book wasn't worth the paper it was printed on.
As for Havok, looking at it is a purely academic exercise. They won't even give an evaluation version to anyone who isn't a major North American game developer, and the assumption is that if you're interested in Havok you can afford the price, whatever that might be, 'cos they sure aren't saying...
A more useful suggestion would be to check out ODE, which is at least free...
Ragdoll and cloth physics - kelvin - Jun 3, 2003 03:07 PM
Quote:Originally posted by OneSadCookie
Actually Havoc is included with Macromedia Director (or was in 8.5, not sure about MX) $1100 is a little hefty for the average schmuck, but it's certainly not out of range.
Ragdoll and cloth physics - w_reade - Jun 3, 2003 03:12 PM
Physics for Game Developers (O'Reilly, right?) is ok for my purposes, but I bought it more as a desktop reference for useful equations than anything else, and I'm not sure I'd want to have to actually learn the concepts from it.
Ragdoll and cloth physics - AJ Infinity - Jun 3, 2003 03:18 PM
Quote:Originally posted by OneSadCookie
OSC: I use Havok. But my version cames with Director MX.
Ragdoll and cloth physics - Skorche - Jun 3, 2003 04:01 PM
yeah, that gamasutra article seems to help. I'll have to sort through and figure out what some of those C++ vector functions do . I'm doing my prototyping in Metal Basic before I go any further with it.
Yeah, O'Reilly book is fairly worthless, except for the basic review of linear algebra.
Ragdoll and cloth physics - AJ Infinity - Jun 3, 2003 04:03 PM
I actually don't have Physics for game Developers. People have recommended it to me and I just though it was good. :?: