How to add moving boundary?

[MuGdxy]

Say I want to simulate a person dancing with the clothes. The person is driven by animation, and the clothes are simulated. How can I achieve that?

[MuGdxy]

Please consider using Vertices Animation.

A user-scriptable vertex animation can cover the demands of moving boundaries.

You need to obey the following steps:

1. Create a boundary mesh. (say, the person)
2. Apply an Empty constitution to the boundary mesh. (telling FEM solver that there is no constitutional energy on this mesh)
3. Set the is_dynamic vertex attribute to 0s. (removing the kinetic energy of the boundary, optional)
4. Apply a SoftPositionConstraint to the boundary mesh. (telling constraint solver that the user will control the positions)
5. Set the is_constrained vertex attribute to 1s. (labeling the user-controlled vertices; 0-labeled vertices will not be taken into consideration for constraint solving)
6. Script your animation function. (In this case, you need to update the aim_position attribute of the vertices so that the constraint solver will try to move the boundary vertices to its aim_position)

Libuipc tries to expose all flexibility to users and expects users to combine its facilities to meet their needs.

Note:

1. The contact settings remain the same; you can apply any contact element to the boundary mesh.
2. If you want to ignore the self-collision of your boundary mesh, please refer to the contact tabular settings Contact Tabular, and try to disable the self-contact of the boundary mesh.