Modifying a curve through control points.

Replies to This Discussion

Permalink Reply by Hyungsoo Kim on August 15, 2016 at 11:41am

This is a demo for you, Best.

Attachments:

• CurveControlPoint.gh, 10 KB

Permalink Reply by pBHATT on August 16, 2016 at 12:04pm

Namaste Kim,

Thanks a lot for the help.

Couple Questions though:

Why do we use the average mean component for the plane value?cant we use xy plane component?

I tried doing it keeping rest of the things same but the point updated differently for X and Y directions. 

My main objective was to move the point around, and here "scale nu" component has been used, is it doing the same thing?I am trying to figure out if the move component will work here

Sorry its talking me quite some time to understand that's why the late reply.

Thanks a ton again.cheers :D

Permalink Reply by Hyungsoo Kim on August 16, 2016 at 1:06pm

Don't concern about those secondary things. It's a demo.

The key point is what Daniel already mentioned bellow.

Permalink Reply by Louie Limjap on April 11, 2019 at 10:39pm

Hi

I tried doing this and I'm doing it in a way where it's all in grasshopper. The errors I get are - 

Node: Replace Items

(1. Index [2] out of range)

(2. Solution exception:Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index)

Node: Nurbs Kurb PWK

(1. Input parameter P failed to collect data)

Can you tell me what I'm doing wrong here please.Screenshot%20%2821%29.png

Attachments:

• Curve_a_Line.gh, 11 KB

Permalink Reply by Daniel González Abalde on August 15, 2016 at 12:06pm

You are moving a point, not a control point of the curve. They are different instances. The logic would be move the point, replace it in its previous version in the list of control points and create a new curve with these control points. 

Although GH is not happy with this type of procedure, here's an object modeling tool:

http://www.grasshopper3d.com/profiles/blogs/gumball-for-grasshopper

And as a final note, what you're trying to do is something common in rhino, but very rare in gh, are used other logics, more instructions and less manual.

Permalink Reply by pBHATT on August 16, 2016 at 12:12pm

Namaste Daniel,

Thanks.:D

Permalink Reply by Daniel González Abalde on August 16, 2016 at 12:56am

Thanks,

I'm not sure of your question. It is quite similar to rhino gumball,, you can move an item or all at the same time, check out the video:

http://www.grasshopper3d.com/video/gumball-for-grasshopper

Permalink Reply by Daniel González Abalde on August 16, 2016 at 1:16am

Something like this?

They remain many gumball but for that I leave open the attributes, to reduce its size in these cases.

Permalink Reply by Daniel González Abalde on August 16, 2016 at 2:04am

Now I see.

A tool can not be generic and specific at the same time (that may be but let me put it this way). There is always room for more specific tools ;)

Permalink Reply by pBHATT on August 16, 2016 at 11:54pm

Namaste all,

Thanks a lot to all for the help guys, I was able to make my first gh definition of excatly what i wanted to do....so happy...(+1exp) :D.

TY again for the help, you guys are epic!!