www.algodoo.com

This can be very useful. Real torsion based on scripted hinge.
No damping handling yet (will implement later), so I use second hinge with brake.

script for hinge:

Code: Select all

_delta = 0;
_constant = 200;
_angle = {
    hinge := readable(owner);
    (readable(Scene.entityByGeomID(hinge.geom1))).angle -
    (readable(Scene.entityByGeomID(hinge.geom0))).angle + owner._delta
};
motorTorque = {owner._angle * owner._constant};
ccw = {owner.motorTorque < 0};
motorSpeed = 10;
motor = true


Damper addon

Code: Select all

_dampingFactor = 1;
_angvel = {
    hinge := readable(owner);
    angvel := (readable(Scene.entityByGeomID(hinge.geom1))).angvel - (readable(Scene.entityByGeomID(hinge.geom0))).angvel
};
motorTorque = {owner._angvel * owner._dampingFactor * 10};
autoBrake = true