*GraphicPair() - coil spring pair
Creates a coil spring pair graphic.
Syntax
*GraphicPair(gr_name,"gr_label",SPRING, spr_name, point_1, point_2, num_coils, radius)
    Arguments
- gr_name
 - The variable name of the graphic pair.
 - gr_label
 - The descriptive label of the graphic pair.
 - SPRING
 - This argument indicates the graphic is a spring pair.
 - spr_name
 - The variable name of the coil spring pair associated with the graphic pair.
 - point_1
 - One pair of connecting points of the coil spring pair.
 - point_2
 - The other pair of connecting points of the coil spring pair.
 - num_coils
 - The number of coils in each of the springs (must be the same for both).
 - radius
 - The radius of the coils.
 
Example
*PointPair(p_spr_upr, "Upper spring point")
*PointPair(p_spr_lwr, "Lower spring point")
*CoilSpringPair(spring,        "Coil Spring",   b_lca, 
                                         b_frame, 
                                         p_spr_lwr, 
                                         p_spr_upr)
*GraphicPair(gr_spr_lead, "Lead Spring",  SPRING, 
                                         spring, 
                                         p_spr_upr, 
                                         p_spr_lwr, 
                                         7, 
                                         20)
    Context
Comments
To avoid the graphic being visible during MotionSolve result animation in HyperView, set the hide_in_post attribute to {{true}}. For example: *Set(gra_link.hide_in_post, true). This option will set the graphic component's visibility to be turned off when the result H3D is loaded in HyperView.