[ODE] mass of collisions - imagine a brush

Tobias Zimmer tozim at gmx.de
Wed May 9 06:43:38 MST 2007


As Remi Ricard wrote, the Universal joint does exactly that! I used it 
to connect the bristles to the head as well.
But the idea of a restoring torque is really good, I haven't really 
thought about this point yet, but that is very
important! I guess, this force has to be built into the joint between 
bristle and head especially.

Thank you for your ideas and fast answers already,

Patrick Enoch schrieb:
> - have all bristles as single geoms, even worse, subdivide the bristles into several parts connected by universal joints.
> - the bristles are connected to the head by a ball joint; preferably a joint that does allow rotation "to the sides", but not "twisting rotation". I have posted the "free6" joint to the list (that is capable of this), but the email has not been approved by a moderator.
> - the bristles can collide among themselves, ...
> - but not a single bristle with itself (lets hope they dont bend too far so self-intersection is possible)
> - the joints stiffness should be possible via a motor with rotational velocity of zero and a maxforce (however, this wont make the bristle return to its original "straight" state)
> - you need to determine the relative rotation of the subdivided parts of the bristle (a relative quat), and add a restoring torque. maybe this should be built into the joint itself.
> best,
> Patrick

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