Can it be automatically extended when it rotates?

[truss_85]

Greetings;

I have block simple that has some rotation action. When it rotates upper lines must be strecth positively and lower ones must be strecth negatively. I did that with 3 grips in attached block. I just want to know is there a way that when it rotates strecth action can be done automatically. Any idea will be apprecieated.

Thanks in advence.

[h_s_walker]

Why don't you use a POLAR STRETCH?

See the attached drawing

[truss_85]

Thank you for answering;

Sure might be but I have two specific problems to avoid polar stretch:

Firstly, Green and red lines must have relatively rotate to each other. (Angle1)

Secondly, vertical line must have rotate half of Angle1. (Angle2=Angle1/2)

When you use polar stretch vertical line cannot rotate half of relative rotation and polar stretch has a second problem which is make same colored lines  narrower or wider.

[h_s_walker]

Am I to understand that the "Final result" for the lines needs to look like an X?

[truss_85]

No it is not. İt is the opposite of X. For different angles see attached file.

[truss_85]

May be I did not very clear about what I want. sorry about that. I want in every angle d1 and d3 parameters may stretching depend on rotate parameter not by hand.

[h_s_walker]

Sorry. I don't understand at all what you want and I've only got LT so I can't work with constraints