Unknown Tangent, Unknown Point

Replies to This Discussion

Permalink Reply by Lewis Moore on February 16, 2015 at 6:44pm

I'm really just trying to find a way to reproduce the results of the rhino command "tangent from curve" in GH

Permalink Reply by Riccardo Majewski on February 17, 2015 at 5:26am

Hi there,

again I'm using "my" custom "rolled up" torus Cartesian derivative graph to this kind of stuff...

please give me some more time to fix latest errors XD, I would like to attach only a clean work...

Somehow low accuracy: I'm trying to make an adaptive subdivision of the curve to increase precision only where needed.

No tree support: for now it works only with 1 point and 1 curve, I'm trying to create a solution that can handle at least a simple list of points and a simple list of curves as input.

Permalink Reply by Hannes Löschke on February 17, 2015 at 5:49am

I don't see any other option than to iteratively search along the curve. Galapagos might help if you have limited amount of curves and points.

Permalink Reply by Lewis Moore on February 17, 2015 at 3:51pm

Yeah, I think I'm coming to the same conclusion, I've been using hoop snake to do it but its slow, inaccurate a and generally pretty clunky. 

Permalink Reply by Riccardo Majewski on February 18, 2015 at 1:48am

Here, I didn't manage to make it works with lists of points/curves...

just 1 point and 1 curve.

It have almost the same exactly results as tangent in rhino and is enough fast for me...

It my "know-how in derivative torus-graph" XP

Hope it helps.

Attachments:

• tangent.gh, 39 KB

Permalink Reply by Riccardo Majewski on February 18, 2015 at 6:06am

Thanks to Pieter Segern now we can input simple lists!

(http://www.grasshopper3d.com/forum/topics/cluster-tree-management)

With cross reference component it should be also possible to manage well custom combinations.

Updated the cluster with some fixes.

Done a user object!

Permalink Reply by Riccardo Majewski on February 18, 2015 at 6:39am

Removed internalized data from user object :P

And this is how to get a cross reference output

(ex. 2 points + 3 curves > 6 branches output)

Attachments:

• TangentPoints.ghuser, 38 KB

Permalink Reply by Lewis Moore on February 18, 2015 at 4:17pm

Your Incredible!!! Thank you so much