Seperating mesh quads based on colour coding

[archz2]

I developed a script that colours faces based on the slope of the terrain.

How can I generate polylines based on the boundary of the colour fill? Like, the green areas can have their own separate boundary ?

TERRAIN ANALYSIS_ARCHZ2_ATTEMPT_NOV_3.gh (646.2 KB)

[laurent_delrieu]

Mesh Iso splitting ?

Marble fractal lines and foliation

Yes it is possible to apply this technique to sphere. [image] Bust instead of applying contour I apply Mesh Iso Splitting, so you need to put a value (double not point) at each vertex of the mesh then iso-splitting then colorize. [image]

Mesh split

You can try mesh iso splitting but you will get triangular faces. For each vertex you have to put a weight could be X, Y or Z depending on the plane you want to cut. [image]

Dual color model design

Hello here is a solution using Grasshopper. As I understand you want to apply displacement and depending of the displacement colorize your mesh. I have done a mesh isoplitting which could be useful. I propose you a script that is doing a real egg shape as a surface. This surface is remeshed and some displament is added as a proportion on the height with a sinus. But you could imagine whatever function you want. and then iso splitting, enter a mesh, a value for each point and an iso value and…

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[archz2]

@laurent_delrieu

Mesh Iso splitting ?

Marble fractal lines and foliation Grasshopper

Thanks …

I opened this script.

Implicit surfaces

Hello Petras I have done a multiple iso splitting of mesh. It didn’t use exactly this algorithm. Hope it could help. [Canvas at 07;42;41] multiple_iso_splitting_mesh_LEGACY.gh (17.9 KB) See also these discussions

It is using c# custom script. I have zero knowledge of c#. Any way to use native components or plugins to generate polylines based on colour fill of mesh?

[laurent_delrieu]

I don’t really see the problem, the only difference between c# component and plugin is that plugin is compiled and you don’t have (most of the time) to the source code. You don’t have to have knowledge in C#. You can put this component in your library and use it as a plugin component, put an ICON …

[myersge]

If anyone still has this problem, here is a script a made with no custom script or plugins needed. The splitting lists looks a bit clunky but I found it worked much faster than a .py script. I used it for a gradient slope analysis with 6 different colours and found it worked very well.

split meshes by colour.gh (15.8 KB)