Intact.Simulation for Grasshopper can restrain surfaces or meshed surfaces to be fixed in all (default) or mixtures of coordinate directions. Restraints are applied to faces of components participating in the simulation by connecting to the Restraints input on the stress solver component.

A restraint has four inputs:

• the geometry of the surfaces to be restrained
• a Boolean indicating if the surface is fixed in the X direction
• a Boolean indicating if the surface is fixed in the Y direction
• a Boolean indicating if the surface is fixed in the Z direction