Yesterday, 12:25 PM
(Yesterday, 11:26 AM)josemendez Wrote: What you want to do is called plastic deformation. Elastic materials return to their previous pose after external forces cease to be applied, elastoplastic materials however retain part of the deformation induced by stress (could require little or a lot of stress, depending on the material's plastic yield), even after external forces are gone. Some constraints in Obi support plastic deformation (eg. bend/twist, shape matching constraints). If you just want the rod to be able to bend and keep its shape, adjusting plastic yield and creep in the rod's bend/twist constraints will do this.
Well, I want it to bend, but from some defined shape and control the exact shape of the rod.
I think good example is medical endoscope - doctor can bend the tip with control handle, so default "rest" shape becomes different, however the whole thing is still a bit elastic. As you said, ignoring the simulation problem when blueprint is changed, that is what I want, to change initial shape, but not just swap, but "define" new or rather modify every frame.
Actually how rod keeps it's shape? Does it try to keep relative orientations always the same?