Organic Pattern_Extractable Outlines

[realtaiwanese]

Hello there, I am wondering if there is a plugin or script that can generate a pattern similar to the attached image. Ideally, I would like to be able to extract the outline and make extrusion based on these curves. Thank you

[laurent_delrieu]

Hello
you could use Directional Reaction Diffusion

Modelling Mushroom Gills in grasshopper or python how?

As advised by Lukas the main job is to find the good algorithms, if you want just perfect fins with perfect symetry simple Maths must be enough (with sinus, cosinus, some fadding …). If you want less perfect ans more nature it seems that reaction diffusion could help you, I must say directional reaction diffusion. Here an example on a sphere. [image] You will find examples here Directional Reaction-Diffusion on a Cactus - Grasshopper reaction diffusion on triangular mesh - Grasshopper And n…

[realtaiwanese]

Hello Laurent, thanks for the advise, I will study into this.

[encephalon]

maybe there is also a way to make a maze script/plugin look more organic? what i personally like in that pattern above are the open endings which maze would provide

[laurent_delrieu]

For sure it could be done with not so much components with a directional maze.

Then some deformation

[realtaiwanese]

Hi Laurent, the Maze approach seems to be much simpler and easier to manage, but I am wondering if there is a way that to make the whole thing more organic and with rough edges like the reference image? The Maze likes a bit rigid. Perhaps I couldn’t rebuild the curve s and increase rotation etc…

[laurent_delrieu]

For sure it is more simple, but I am not sure you will find the directional maze ! I will publish it in a future plugin.

@realtaiwanese

to make the whole thing more organic and with rough edges

you can add some noise on the curve, apply some transform. There are many ways.
Here is one

Blending between Mesh and DualMesh

Thanks, Entagma is a great source of inspiration, the Kingfisher came from another dicussion Here the script to bend and blur lines in Grasshopper. Provide lines, then enter a coefficient for the main bending, a coefficient for oscillations and number of segment. here with the 2 coefficients [image] Second coefficient =0 [image] blur lines legacy.gh (417.9 KB) I also made snowflakes also dual mesh (dual scluptures) https://www.instagram.com/p/Bb8DY-sBsK0/ And some others

For me Reaction diffusion is more organic, except the speed I don’t really see any problem with it. For sures it will be harder to extract curves, but do you you really need curves ?

[realtaiwanese]

Hi Laurent, yes, I was asked to extract the curves for the project that I am currently working on. For the “Directional Reaction-Diffusion” approach, I assume I will need some knowledge of either C# or Python to comprehend the pattern? I found a tutorial regarding this topic on Youtube, do you think it is a good starting point? Quarantine series - gh Python. Reaction Diffusion (part 1) - YouTube

I also discovered another approach by using Bitmap. Not sure if this is easier to comprehend… I am a little bit lost at the moment as this is a new field for me.

[realtaiwanese]

Hi Laurent, could you please share the name of the Plugin “MazeKruskalAdvanced”?Parakeet’s maze doesn’t seem to give me the same control. Thank you.

[diff-arch]

@realtaiwanese

“MazeKruskalAdvanced”

If I’m not mistaken it’s Laurent’s own component that isn’t public.

[laurent_delrieu]

@realtaiwanese

MazeKruskalAdvanced

As @diff-arch said it is not available. It was published some years ago but I removed it. I gave many free stuffs but now I refrain myself.

[laurent_delrieu]

Hello
here is a simple solution to extract the curve from Reaction diffusion.
First make a surface and remesh it with triangles (du to the simple algoritm in reaction diffusion)

Put some guide curves (not mandatory)

Use reaction diffusion script with a directional factor more than 1

I move points following Z and relative to the coefficient A with a movement between 0 and 1
Make a plane XY between 0 and 1 in Z
Use Mesh Plane

You have your curves.

If directional factor is less than 1, direction is perpandicular

You can tweek many things to change the results. Play with the coefficients.

There is a solution in 3d but seems to complex at the moment.
reaction_diffusion_planar.gh (48.4 KB)

[realtaiwanese]

Hi Laurent, thank you for the in-depth reply. I will study your script and hopefully, I can be as good as you one day…haha

[benedict (Ben)]

I think there was a plug-in from one of the devs based on poTrace…
…re found it! it’s called Vectorize and it’s from Dale Fugier. this works pretty well and fast. However, it might require to adjust the image, but yours seems pretty ok.

Vectorize

hope this helps.

Ben

[realtaiwanese]

Hi Ben, I will certainly look into this plugin. Thanks!

[laurent_delrieu]

@benedict and @realtaiwanese also this one

Turn Hand Sketch Lines/curves to Rhino vector lines/Curves

Hi all, I am curious if there is any plug-ins can help to turn hand sketch lines / curves into rhino vector lines / curves. I have tried with the Rooster plug-in, but realize it recognizes color and trace it as boundary… I think this is not what I after. What I want is tracing it as lines or curves, as “03” shown. I wonder if there is any plug-ins or methods can achieve it? Thanks for any suggestion [bce8318e5446d397723239ff8acccd6] Hand Sketch Lines Tracing.3dm (3.6 MB) Hand Sketch Lines …

[benedict (Ben)]

thanks, I am aware that there’s a entire science sector behind edge detection and a ton of different methods. I had studied some of them for a gemstone scanner project in python, but thought this would be the easiest solution for @realtaiwanese. Yours looks pretty nice, though! As always, when you do stuff, @laurent_delrieu

Edge detection

I wonder why there’s so little examples of edge detection from cute cat pictures…

@realtaiwanese : You could also try and use _-heightfield which will handle about everything for you…not available on grasshopper though, just as command in rhino. Pretty powerful tool!

[laurent_delrieu]

@benedict

Yours looks pretty nice,

Thanks but I almost did nothing as it is a reuse. it gives that on @realtaiwanese image

Medial Axis from multiple closed curves, middle of double lines

Ok here a little code that uses 95 % of code from TAW. This code is doing thinning of an image https://homepages.inf.ed.ac.uk/rbf/HIPR2/thin.htm [image] [image] You must have a good black and white image. If not … [image] image_thinner_LEGACY.gh (7.2 KB)

But this could be enhanced. Here I use my own tools (future plugin )