Moving part of an objet with a hotspot

[Anonymous]

I am trying to put in place an objet that has a 3D form and 2D éléments, the red lines (please see images). I would like to allow the user to move manually the 2D lines in red. The 2D red lines are on itself an objet that is called into the final object.

I have managed to use the ADD2 and allow to enter a distance but I would prefer to let the user freely move that part of the objet (the 3D doesn't move).

So far this is the code that I have to call the 2D lines and move it by the ADD2 command. How could I change so to have a point to manually drag the red lines?

Thank you in advance.

ADD2 0,-AF5_A
        gosub "symbole 2D"

            end

"symbole 2D":
call    "AF1",
    PARAMETERS A = 0.187450297757, B = 0.176699818365, ZZYZX =            1,
        AC_show2DHotspotsIn3D =      1, ac_bottomlevel =            1,
        ac_toplevel =            0, use_stored_environment =      0,
        lineTypeAttribute_1 = lineTypeAttribute_1, penAttribute_1 = penAttribute_5,
        penAttribute_2 = penAttribute_6, penAttribute_3 = penAttribute_7
del          2
pen     penAttribute_6
hotspot2 -1.027559348263E-16, 0.04500000948274
hotspot2 -1.192886700985E-16, -0.04500000948182
hotspot2 -1.110223024625E-16, 1.110223024625E-16
hotspot2       -0.012, 1.37906053464E-9

[Anonymous]

You can find precious information and file examples at the Graphisoft GDL Center.
How to make an always readable text?

[Anonymous]

Thank you. I'll let you know if I get back to it. Right now no more time for this task...