Point on curve newbie question...

Hi Guys,

This is my first post and I am very new to Grasshopper, hope you can help me out.

I've made a routine to draw lines through two points; One is a fixed basepoint, the other one is a 'point on curve'. If I lineair array this, I get the following (see attached images).

I would really like to 'advance' the 'point on curve' by a factor, so that each next curves starts a little later (wave effect). Unfortunately, I can't add the integer of the 'point on curve' slider.

Do you have any ideas how it can be done? Maybe with a 'divide curve'? I tried that also, but my newbie status got in the way ;)

Thanks in advance,

Jeroen

Attachments:

Schermafdruk 2017-01-18 21.37.12.png, 170 KB
Schermafdruk 2017-01-18 21.37.42.png, 138 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on January 18, 2017 at 2:47pm

Without any GH code, I don't want to play. ;)

However, if your question is about placing points on a curve at irregular intervals(?), there are several methods:

You can 'Reparameterize' a curve and then use 'Eval (Evaluate Curve)' with a list of 't' values between zero and one, perhaps obtained from a 'Graph Mapper'.
For a list of points at specific distance intervals, you can look at this thread from yesterday:

divide curve by distance between points

Permalink Reply by Jeroen de Bruijn on January 18, 2017 at 2:53pm

Thanks Joseph, I will try to explain myself a bit better;

If I have for instance 5 (x) curves with a 'point on curve' applied, I would like to get the following result; curve 1, point @ 0% - curve 2, point @ 20%, curve 3, point @ 40% and so on. If I change X, the percentage of each curve changes. This way, I will end up with a wave-like pattern in my array of curves.

Upon your request, here is the code :)

Attachments:

Jeroen.ghx, 127 KB

Permalink Reply by Jeroen de Bruijn on January 18, 2017 at 3:51pm

I'm sorry but I don't know what you mean by that :/

It's solved when I can connect these two lists of points to each other in this matter;

centerpoint 1 to divide point 1 of 3

centerpoint 2 to divide point 2 of 3

centerpoint 3 to divide point 3 of 3

Attachments:

unnamed.ghx, 77 KB
Schermafdruk 2017-01-18 23.46.25.png, 367 KB

Permalink Reply by Joseph Oster on January 18, 2017 at 4:03pm

Right click on the 'Curve' geometry and select "Internalize data". Otherwise your code is useless without the Rhino file where that curve is located.

Sorry, I don't understand what you're asking. Have fun.

Permalink Reply by Joseph Oster on January 18, 2017 at 4:00pm

You forgot to internalize your curves and reference points? Like this?

Attachments:

Jeroen_2017Jan18a.gh, 11 KB

Permalink Reply by Joseph Oster on January 18, 2017 at 4:09pm

I suggest that you avoid renaming components as you did here with 'ArrLinear' => 'crv'. Fine to rename inputs and outputs but it's nice to know at a glance what the component is.

Attachments: