Create a Parametric Curve that can rotate on a fixes point?

Grasshopper
1

Hi guys.

Can some one please help me.
How can I create a parametric curve that I can change how wide it is and base the middle of that curve on a fixed point. So I can rotate my parametric curve in any direction.

Later I want to creat an offset of the that curve and extrude it to create a solid rainbow shape.

Any help would be wonderful.
Thank you.
Ian :slight_smile:

rotate
rotate900×813 39.1 KB

2

I created this simple Elipse but I have no idea how to make this free moving based on 1 fixed point.

ellipse
ellipse1407×549 55.1 KB

3

Something like this?


ArcFrMidPt_re.gh (7.8 KB)
4

Hi Ian,

I think it can depend on your curve equation to optimize the input variables but this is what came up with. I hope it helps you.

Fixed-point crv.gh (7.7 KB)