Trying to fix the object

[JeffsonYu]

Hi,

This problem isn’t well defined: the shape of a deformable object cannot be determined using an affine transform. Transforms only make sense for rigid objects.

Think about it this way: if the softbody deforms a lot (for instance, a straight bar bends into a circle), is this purely deformation or is it also translation/rotation? If so, how much of it is translation, how much rotation, and how much deformation?
When determining translation/rotation, what point do you consider to be the center of the object? Its center of mass? The average of all points in it? Some arbitrary point?

There’s no clear answer to any of this, so you must be a lot more specific regarding what “deform” and “transform” mean in your specific use case.

Kind regards,

Hello, Thank you for your reply! I'm currently using a hand to grab the obi softbody to obtain several information of grasping, but now it seems that even if I remove the gravity in the obi solver, the object will still move if I attach a force onto it. So I intend to keep the deformation of the surface of softbody, like depression of the barrels in the sample scene, and also fix the object so that it cannot move or rotate because of the force. I hope I made it clear this time... Again thank you for your help!