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+--- Thread: making the rope stiff ? (/thread-3830.html)
making the rope stiff ? - Mickle - 03-04-2023
i am using obi rope to simulate simple pendulum but i am having a problem with the rope, when i increase the mass of the ball, the rope gets stretch as you can see in the video, but i need it to not stretch, instead it supposed to get more stiffed, so how can i make it do that ?
RE: making the rope stiff ? - josemendez - 03-04-2023
Hi!
Increase the amount of substeps in your ObiFixedUpdater, and/or reduce the rope's blueprint resolution.
This, assuming you can't or don't want to just increase the mass of the rope too. Convergence in most physics engines decreases with large mass ratios (objects of very different mass interacting with each other). In some engines, this causes instability/jittering. In Obi -and all position-based engines- this causes spurious compliance.
The manual contains a very in-depth explanation of the engine works internally and how substeps and iterations affect convergence speed and overall quality:
http://obi.virtualmethodstudio.com/manual/6.3/convergence.html
kind regards,
RE: making the rope stiff ? - Mickle - 03-04-2023
(03-04-2023, 09:46 AM)josemendez Wrote: Hi!ty !
Increase the amount of substeps in your ObiFixedUpdater, and/or reduce the rope's blueprint resolution.
This, assuming you can't or don't want to just increase the mass of the rope too. Convergence in most physics engines decreases with large mass ratios (objects of very different mass interacting with each other). In some engines, this causes instability/jittering. In Obi -and all position-based engines- this causes spurious compliance.
The manual contains a very in-depth explanation of the engine works internally and how substeps and iterations affect convergence speed and overall quality:
http://obi.virtualmethodstudio.com/manual/6.3/convergence.html
kind regards,