(13-06-2022, 11:49 AM)josemendez Wrote: Hi Natty!Hi Jose,
Your code is fine, it's just that changing the length of the rope to its rest length all of a sudden will of course cause it to spring back will quite some force.
Imagine if you had a box hanging from the ceiling by a 4 meter rope. Then the rope gets its length magically and instantly changed to 2 meters while still being attached to both the ceiling and the box: assuming an unbreakable rope, the rope would pull the box up at top speed (or the ceiling down, depending on build quality). Then inertia would cause the rope to swing around for a while.
A quick and dirty workaround would be to temporally set the solver's damping value to a very high value like 0.98, change the length, then set the damping back to whatever it was after a second or so. Damping causes energy to "evaporate", so the rope would go back to its original length slowly.
An proper solution would involve moving whatever objects the rope is attached to a distance equal to or smaller than the rope's length, change rope length,
and then (depending on where your cursor is located along the rope) move all its particles to a position that minimizes energy.
kind regards,
I seem to be struggling with this all quite a lot. I'm wondering if just restarting would be better, or if you can point me a direction. I am still using the settings described before in this post (with your suggestions added). The rope itself is still way too "springy" and overall just out of control. I also noticed at times that the rope "disconnects" from the bobber where it is attached, like there's a small gap of space there sometimes.
My idea was to use Obi Rope, play an animation to wind up / pull back the fishing pole, then on the animation for casting forwards, apply a forward force to the bobber and increase Obi Rope length at the same time. Although I am getting this halfway working, the rest of it all is just a mess in terms of the rope spinning out of control and overall just how bouncy/springy it is. I am happy to post up settings and details again if needed.
I may just need to spend more time and it's possible I'm tired today, but I am starting to feel defeated here.
Edit: In addition to the above, I can't get a semi-realistic hanging bobber. For some reason the bobber when hanging from the rope, dangles in strange ways. It almost looks like the mass is not being applied to the bottom part of the bobber. So I set the rigidbody's center of mass to the bottom part of the bobber, but that still didn't make a difference. Sometimes when running around the bobber flips upside down and almost looks like it's floating a bit. Yet gravity and mass is applied. I just want it to swing/hang properly as you would expect with a heavier object hanging from a rope. It's like the red upper part of the bobber where the rope connects is what's controlling how the bobber moves, and the center of mass at the white bottom part of the bobber is just not being counted.