*SetContact() - PointToDeformableSurfaceContact
Sets the values associated with the PointToDeformableSurfaceContact.
Syntax
*SetContact(contact_name, 
                                  radius, 
                                  stiffness, 
                                  damping)
    Arguments
- contact_name
 - The variable name of an existing contact entity.
 - radius
 - The radius of the sphere representing the point, in the point to deformable surface contact.
 - stiffness
 - The stiffness coefficient for the contact force model.
 - damping
 - The damping coefficient for the contact force model.
 
Example
*BeginMDL(the_model, "The Model")
 
*PointToDeformableSurfaceContact(con_0, "Contact 0", B_Ground, 
 P_Global_origin, LINEAR, defsur_0, true)
 
*DeformableSurface(defsur_0, "DeformableSurface 0", NATURAL, 1, 
 1, Global_Frame)
 *SetContact(con_0, 5.0, 1000.0, 0.1)
*EndMDL()