Help ReattachingParticle

[josemendez]

That's strange- because with this method the rotation of rope ends(particle connected) is off of target

Ropes have no rotation or orientation of any kind. Rope particles are just points, and ropes are simply a sequence of lines drawn from one point (particle) to the next. You can't control rope "rotation", because there's no rotation. As stated in the manual:

Ropes are built by chaining particles using distance and bend constraints. Since regular particles have no orientation (only a position), torsion effects cannot be simulated.

If you want to explicitly control orientation/rotation, use rods instead. When using rods, attachments have a "constrain orientation" checkbox that allows them to remove all rotational DOFs.

maybe tangents update is needed to fix this? (in this case would like to know how it's done)

Tangents only exist in the blueprint, since their only purpose is to define a bézier curve for initial particle placement. At runtime, path tangents have no influence at all on the simulation since they're an editor tool. At runtime all you have are particles.

because with this method the rotation of rope ends(particle connected) is off of target

I think what you mean by "the rotation of rope ends" is simply the position of particles other than the one at the end. If you want to constraint the "rotation" of the rope, the obvious solution is to attach more than one particle.

From a geometrical point of view, you can think of it this way: a single point in space does not define a "direction" or "orientation". Two points however, do. So if you only attach one particle, the rope is free to rotate around it. If you attach two particles however, the rope is forced to pass trough the line segment defined by them.

Check the wall-mounted ropes in the RopeShowcase scene. They use this technique to stay perpendicular to the wall.