help with islamic pattern

Hello everyone, I am very new to grasshopper and i am learning how to deal with it while making an assignement. so my target is on the picture 1. I created it with the evaluate curve command and I am controling it thourgh a slider to attract to points to the center and change the shape . What I want to do is to copy it with different values on the slider to have a changing pattern. I did make a copy and I am stuck how change to value for each pattern. Maybe I need an equation or something I couldn't figure it out. I would appreciate any help.

Thanks all

Attachments:

24fc6fb5ed05573c1d7c7fe85b4e8acd (1).jpg, 558 KB
a.JPG, 193 KB
b.JPG, 112 KB

Replies to This Discussion

Permalink Reply by Tobias Scheeder on June 2, 2017 at 3:37pm

Works fine!

@sarra you need to bake the attractor curve to rhino and referenz it in grasshopper. Then you can enable the control points (F10) of the curve in Rhino and modify it.

Permalink Reply by Joseph Oster on June 2, 2017 at 4:01pm

Thanks Tobias, yeah, I "internalized" that attractor curve in GH but you can connect any Rhino (or GH) curve there instead. For a Rhino curve, you'll need to clear the internalized curve - right click the param and choose "Clear values":

Even a circle.

Permalink Reply by sarra hadji on June 2, 2017 at 4:08pm

yeah i checked the file again the same problem occured, and according to your screenshot the remap numbers is missing from the file I donnow what happened.

Could you make a screenshot of all the script so I can check what is missing and reproduce it? that would be great

Permalink Reply by Joseph Oster on June 2, 2017 at 4:29pm

What version of Grasshopper? It will fail without some version of 'ReMap'. That would explain it for sure! I can reproduce your results if I delete it. It is critical for two reasons:

It's the only connection to the attractor ('Pull Points').
Without 'ReMap', the vector amplitude is too large and you lose the negative direction that moves points toward the polygon center. You can see this by connecting 'Pull (D)' output directly to 'Amp (A)' input, bypassing 'ReMap'.

I posted a screen shot earlier of all the code (not including your grid code in the dark gray group) but honestly, there are probably too many hidden details to get it from a screen shot alone. Like the Expression ("x/2") on the 'ReMap (R)' output.

Permalink Reply by Joseph Oster on June 2, 2017 at 5:11pm

I wrote a custom version of 'ReMap' that should work for you?

Inside the 'remapp' cluster:

Attachments:

fffffffinal1_2017Jun2c.gh, 31 KB

Permalink Reply by Joseph Oster on June 2, 2017 at 6:05pm

I broke the custom 'remapp' cluster into two pieces: 'dBnds' and 'remapp'. And I replaced the grid code with something simpler(?). This is the entire GH model - it works exactly the same as before:

Attachments:

fffffffinal1_2017Jun2d.gh, 36 KB

Permalink Reply by sarra hadji on June 3, 2017 at 5:59am

woow, that works like magic thanks a lot for your help much appreciated ^^ and I also have way more information about how GH works than before. I really appreciate it. I just added a move code for the curve so I can move it through two points vector in Rhino and be able to have more variety in the overall panel.

Permalink Reply by Joseph Oster on June 11, 2017 at 9:25pm

Hello Sarra, I just posted this in another thread and thought it might be of interest to you as the basis for an Islamic pattern?