*BodyPair()
Creates a body pair.
Syntax
*BodyPair(body_name,"body_label",[cm_origin], [im_origin], [lprf_origin], [vm_marker] [wm_marker])
    Arguments
- body_name
 - The variable name of the body pair.
 - body_label
 - The descriptive label of the body pair.
 - cm_origin
 - An optional argument for the center of mass for each body of the body pair.
 - im_origin
 - An optional argument for the origin of the inertia marker for each body of the body pair.
 - lprf_origin
 - An optional argument for the origin of the local part reference frame for each body of the body pair.
 - vm_marker
 - An optional argument that specifies the direction of translational velocity initial conditions.
 - wm_marker
 - An optional argument that specifies the axes about which angular velocity initial conditions are defined.
 
Example
*BodyPair(b_wheel, "Wheel", p_wheel_cg)
*PointPair(p_wheel_cg, "Wheel center of gravity")
*BodyPair(b_wheel, "Wheel", p_wheel_cg, , , 20)
    Context
Properties
| Property | Returns Data Type | Description | 
|---|---|---|
| cg | PointPair | The location of the center of mass for each body of the body pair. | 
| cm | MarkerPair | The marker at the center of mass for each body of the body pair. | 
| dummy_bodies | boolean | Flags MotionView to use dummy bodies for all attachments of flexbody. | 
| im | MarkerPair | The inertia marker of the body pair. | 
| l | Body | Left body. | 
| label | string | The descriptive label of the body pair. | 
| lprf | MarkerPair | The local part reference frame for each body of the body pair. | 
| node_tol | real | Sets the tolerance to be used when the Find button in the interface is selected. | 
| r | Body | Right body. | 
| state | boolean | Control state (TRUE or FALSE). | 
| varname | string | The variable name of the body pair. |