Find/create points on a curve that has been offset

Hi all,

This might be an easy question, but I could not figure it out with ..closest.. modules.

Is there a way to construct points on an off setted curve/line.

I need two new points per existing points that are perpendicular i.e. shortest distance.

This principle is shown in red in the image below.

Replies to This Discussion

Permalink Reply by yehezkielwm on January 18, 2017 at 6:20am

I would do a cross product of the direction of the line with the Vector3d.ZAxis (if the line is flat on XY basis) to find the orthogonal lines (red line in your image). Then CCX (curve-curve intersection) module to find the points.

Permalink Reply by Sebastien de Wit on January 18, 2017 at 6:29am

The model consist of a 3D double curved shell structure where each panel is flattened. So the curves/lines are flat, but not all lines are in the world XY plane. Is your solution still valid??

Permalink Reply by yehezkielwm on January 18, 2017 at 6:35am

Actually it depends on how you offset the hexagons. Line would be a bit difficult, perhaps if you can create a surface that the normal of the surface = Curve.Direction At(parameter), then have intersections between the surface and the offset hexagons you can get the points. Make sure the size is big enough that the curve will intersect.

I just saw the file on the other discussion. I can help you but maybe when i got free time after work.

Permalink Reply by Sebastien de Wit on January 18, 2017 at 6:57am

First of all thanks for your quick response. I would really appreciate the help, its the last module of my grasshopper model for my graduation so it would be awesome if the problem could be solved.

Yours sincerely

Permalink Reply by Sebastien de Wit on January 18, 2017 at 6:34am

And the GH file.

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