Constraining a Single Rigid Body to a Point in Space

In addition to constraining two or more rigid bodies, you can also constrain a single active rigid body to a global position in space. You can either pick a spot in global space or use the rigid body's center as the constraint position.

To constrain a single rigid body to a point in space

Choose any of the three following workflows:

Choose a constraint from the Create Rigid Body Rigid Constraint menu in the Simulate toolbar: Hinge, Ball and Socket, Spring, Slider, or Fixed. The constraint object is created.
Left-click the spot where you want the constraint to be positioned — the constraint object goes there.
Left or middle-click to pick the active rigid body. The constraint object is attached to this object's center.
Right-click to end the picking session.

NoteWith this workflow, you can place sliders and springs only at the scene's origin.

OR

Select the active rigid body to be constrained.
Choose a constraint from the Create Rigid Body Rigid Constraint menu.

The constraint object is created at the position of the rigid body's center.
Right-click to end the picking session.

OR

Choose a constraint from the Create Rigid Body Multi Constraint Tool menu.
Left-click to pick the object to be constrained.
Middle-click the same object.
Left-click the spot where you want the constraint to be positioned — the constraint object goes there.
Right-click to end the picking session.