16-11-2018, 12:13 PM
(16-11-2018, 11:00 AM)innovine Wrote: I have two small mass (1kg) rigidbodies, one on each end of the rope (particle mass 0.05. It seems to always come to a rest with the rope being straight, but with some angular velocity remaining. Why is the rope straight? The masses do not have any drag set on their Rigidbodies. I expect the system to bounce and twist indefinitely. Damping in the solver is set to 0. Is there some kind of internal elasticity in the rope causing it to straighten out?
If i increase the mass of the particles, the rope spawns in knots and looks very agitated, spiraling like crazy. Why is this?
The rope has internal bending resistance, so it always strives to be completely straight. Disable bend constraints or set their stiffness to zero.
As with any physics engine, large mass ratios reduce stability. Unity recommends keeping the mass ratio under 1/10 at all times. You can either increase the mass of the rope particles, or decrease the mass of the bodies.