Make a straight line in rhino into an adjustable curve line with grasshopper

by Nathakit Sae-Tan

Jan 4, 2016

Hi,

Im a newbie in grasshopper and want to transform a straight line in rhino into an adjustable curve line with grasshopper. My idea is to have the graph mapper adjust my line. Although there maybe better ways than this, please feel free to point out.

This is done by pulling down points in rhino as an example. On the right is what i tried and faild miserably.

I've looked into some examples but couldn't get it working.

  • up

    peter fotiadis

    Well ...

    IF this is some AEC oriented thingy and in order to simplify things (at later stages: skin and the likes) I would strongly suggest to use a Bezier Span (only 2 vectors required) in order to go from straight to curvy. This yields "smooth" rails for sweep2 etc etc and avoids unnecessary complexity in the future skin of yours (Note: this "method" is NOT applicable if you have "twisted" skins in mind). 

    Additionally and if further restrictions are required (as happens in real-life: skin and the likes) you'll have far less "constrains" to manage.

    Another classic way to do it is to orient your profiles (rotated and/or scaled [here's a typical case for a graph mapper]) using perpendicular planes derived from some (tower) axis ... and then loft the sum of profiles (or sweep2 pairs of rails and profiles if you want to have individual control on the skin sides).

    In all the cases surface "modules" need some planarization policy (case: quads for curtain wall items) or triangulation. Triangulation appears "easy" (and academically speaking is) but in real-life is a giant rabbit hole with regard curtain wall aluminum systems (that don't leak in the long term)

    3

    Jan 4, 2016