[ODE] Ball-Socket-Joint with some Radius ?

[James Golding]

I'm not sure there is a clean way to do this with the standard joints in ODE. Seems like what you 
want is a new constraint type that just limits the distance between a point in each body (like a 
slider with no angular constraint, and which changes axis every frame). That should be pretty simple 
as its only 1 DOF, so would actually be faster than a ball and socket.

If you didn't want to try writing your own constraint right away, you could possibly do a vile hack 
using a frictionless contact. If they two anchors get too far apart, put the contact position at the 
anchor on one body and point its normal back towards the other anchor, setting the penetration to 
(current distance - allowed distance). That _might_ work :)

James

sfgx@freenet.de wrote:
> That's not what I meant. I know, the anchors of a ballsocket-joint can be
> placed 'outside' the body, but this is not what I need.
> 
> I need some joint where the object is allowed to move freely around the anchor inside a virtual sphere with given radius. The ball socket joint
> doesn't allow any changes in the distance of the anchors.
> 
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