Does any one know, how to create tank with physics engine on A7? I've made it with simple C_MOVE. But I want it to be more realistic. So I've decided to make it with physics.

what sort of tank?
wheels or chains?

With chains. With wheels, I guess will be the same as with car physics.

i think chains will act like wheels, but i have no idea how to create something like this

use z-moveable pathpoints under the wheels and move the chainparts to the pathpoints

move the texture on a static mesh instead.

I'm not asking about visualisation... Do I need to create it as cars physics? There is on way to make chains move with physics?

To get a realistic tank with chain you could try using constraints for everything.
- link all chain parts with a PH_HINGE together
- for the wheels use PH_WHEEL
- before you create the chain constraints try to arange them at the right positions
( perhaps a helper mesh containing all chain part positions as vertices)
- tower etc. I don't explain.
Because of the small size of the chain parts it could give problems with the collisions( I had them trying it with A7/ODE, so I stopped this project)

Another posibility would be:
- to create one object for each chain( should be two ) and one for the tankbody
- linking them with a fixed joint
- than add velocities to the centers of the chain objects.
- you should fit their physical material properties
- for the visuals of this solution see Quadraxas post.

hope i was understandable

muffel

check this out for faking pallets/chains:

http://www.opserver.de/coni_users/web_users/pirvu/au/demo/zips/bulldozer_s2008.zip

@muffel: PH_HINGEing all chain parts wont be stable enough for a tank.

This is just great!!! ^_^ Thank you.