rhino stretch command possible in grasshopper?

I am looking for a way to scale an object like it is possible by using the rhino "stretch" command, but inside grasshopper. I have to "stretch" (scale 1D) an object just in it´s middle without deforming it´s ends. are there any ways? thanks in advance

Replies to This Discussion

Permalink Reply by Vicente Soler on March 18, 2014 at 5:18pm

What type of geometry is it? (curve, surface, mesh, brep);

Can you post a Rhino file with the geometry and two lines indicating the amount of scaling and location?

Permalink Reply by horst Becker on March 19, 2014 at 1:25am

hey vicente,

mostly I have to deal with curves, but it would be nice as well if there would be a solution for surfaces. attached I send you a rhino file where you find both...curves and surfaces...the red "sketch" layer illustrates the stretching regions and their domains....in the attached example I have a curve network, I do not know if this is handable, if not the outline curve would be fine as well....thanks a lot for your help!

Attachments:

stretch.3dm, 1.1 MB

Permalink Reply by Vicente Soler on March 19, 2014 at 5:34am

I think this should work (haven't tested it much). This should work for planar surfaces with or without trims. I had to add an extra 0 to your tolerance settings to be able to regenerate all the trimmed surfaces.

Attachments: