View Full Version : Game physics on Nvidia GPU

03-20-2006, 09:54 AM
Title says it all.

Perhaps something for BoB?

03-20-2006, 03:11 PM
Havok and other phys engines like Karma really fall flat on a couple of details that I hope this covers:

--Air resistance. Obviously should be an added parameter, since a space or underwater game wouldn't want it, but air resistance causing irregular objects to tumble is half of what makes the motion convincing. Approximating it isn't even that complicated.

--Young's Modulus. When you apply enough force to a material, usually at some point it'll break (the equation to track this is called Young's Modulus). Dynamic tesselation to 'break' something, and seperating parts dynamically has been done plenty--time to make stuff breakable. Wing stress, tension overload, blowing doors of hinges; we should have this stuff by now.

There's some other big stuff I have my gripes with, but it's mostly related to the way Havok does ragdolls. They move like rag dolls, not like limp bodies. Joints have neutral positions, interdependant range of motion limits, and the thigh shouldn't clip with the calf, or the forearm with the bicep or the stomach.

...Anyway. Yeah, I bet this could be very helpful in optimizing flight sims. It could prove useful for handling the simpler physics and letting the CPU deal with more complex FM that Havok isn't set up to do by default.

03-20-2006, 03:23 PM
Originally posted by Immermann:
Title says it all.

Perhaps something for BoB? I wouldnt get my hopes up.. These speialised physics PUs are not all that useful to flight simulation.. Might come in handy to do some balistics aspects of the sim.. but other than that I think they will be as popular as MMX was to video

03-20-2006, 04:46 PM
I would guess the physics processors are designed to do simple rigid and soft body dynamics, like the barrels and stuff in Half-Life 2. Newer FPS games have a lot of this, and it's a drain on the CPU.

Sims don't use dynamics systems like this. Unless in the future, tanks can flip, and pilots are controlled by rag doll.

03-28-2006, 04:18 AM
Prehaps do a followup on your finding, and you would see that the nVidia way is just to improve eye candy. It dosen't do real physics, like rocks hitting the player or stuff like that.

First: http://www.theinquirer.net/?article=30434
Second: http://www.theinquirer.net/?article=30571

03-28-2006, 10:10 AM
Hello http://forums.ubi.com/images/smilies/winky.gif

speechless http://forums.ubi.com/groupee_common/emoticons/icon_eek.gif Quite a power http://forums.ubi.com/images/smilies/compsmash.gif


03-28-2006, 11:58 PM
These chips are all just starting out and will change before any kind of standard.
What game developer wants to tie 4+ years of work to something like that?