Problem with origami kinetic facade grasshopper

Good afternoon

I am having a problem with my uni project.I have created a folded form which moves according to the changes of the enviroment.Everytime the faces move the triangles stretch and they become bigger.I want each surface to retain its surface and not stretch
Any suggestions?
here is my gh file
new2_grasshopper 01.gh (118.9 KB)



Help Us Help You - Grasshopper - McNeel Forum

yes of course!
I forgot to upload the .3dm,sorry about that!
base.3dm (93.5 KB)
I think it should open now.