Replicate Volumetric Noise with Dendro?

[ShynnSup]

Is there a way to replicate in Grasshopper what can be seen on this video?

Basically using volume builder, a random noise pattern is applied…
I am thinking maybe Dendro can be used to make use of OpenVDB library, but not sure how to replicate the random field…

Cinema 4D R20 Tutorial | Volume Disolve Effect with Fields

Creating this kind of geometry with spheres would also be nice…

[laurent_delrieu]

Hello
Dendro is a wonderful tool. I don’t think this has been implemented. As Dendro is a part of OpenVdb I think isosurfacing could be implemented.
At the moment you must use isosurfacing. Millipede is good. Perhaps Jellyfish Dodo Kampecaris … and

Isosurfaces / Signed Distance Fields

With Millipede all the work happens upstream in the evaluate component because it forces you to give it the value of the field at every grid point as an input. This is exactly what I wanted to avoid. Here for the same function and resolution Millipede takes over 150x as long as the script posted above. [image] Isosurfacer_Millipede_comparison.gh (17.7 KB)

C# isosurface

There is not great difficulties implementing it. The difficulty is to have an optimized one. You didn’t search a lot on internet, classical reference is http://paulbourke.net/geometry/polygonise/source1.c private void RunScript(List<double> values, Box box, int nx, int ny, int nz, double iso, ref object M, ref object P) { List<Point3d> boxPoints = new List<Point3d>(); double dx = (box.X.Max - box.X.Min) / (nx - 1); double dy = (box.Y.Max - box.Y.Min) / (ny - 1); double dz …

Kampecaris for Gh2

We’ve just released our Kampecaris plugin for Gh2. it’s available for download on GitHub. We started its development back in July 2023 at the DigitalFuture Persian Workshop. As of now, Kampecaris is an ongoing project, primarily focused on exploring voxel-based 3D modeling. We got a lot of ideas from really cool plugins like Chromodoris, Millipede, Monolith, and Dendro. However, voxel-based modeling can benefit greatly from the use of fields. Gh1 did well with fields, but Gh2 has greatly i…

And for the noise you can use many tools like 4dnoise Tundra or Nautilus

[ShynnSup]

@laurent_delrieu

And for the noise you can use many tools like 4dnoise Tundra or Nautilus

Hi Laurent, thanks for the references.

But in this case it is a noise that is subtracting? Like making a boolean difference?

[laurent_delrieu]

I think you don’t understand, noise in these tool is a scalar field, meaning it is a numeric value (a weight, a double a float …) that can be given to each point of the space. To make that to a volume you just have to choose a range of value you want.
Iso surface view from Millipede

Point view

Dendro view with points transformed to spheres

iso surface.gh (11.7 KB)

[ShynnSup]

@laurent_delrieu

I think you don’t understand, noise in these tool is a scalar field, meaning it is a numeric value (a weight, a double a float …) that can be given to each point of the space. To make that to a volume you just have to choose a range of value you want.
Iso surface view from Millipede

Ohh so the noise simply culls points and then voxelization is run. Thank you Lauren!

I don’t follow why Millipide is needed? If Dendro is only required to do the voxelization.

[laurent_delrieu]

@ShynnSup

If Dendro is only required to do the voxelization.

I cheat a bit, Millipede, Kampecaris … will give you the frontier where there is a change in the weight.
If limit is 0.5 and weight between 0 and 1
Good tool will give the black line (face in reality)
Dendro will use green dot and add a sphere.

As I said I am quite sure the functionality exists in OpenVdb and wasn’t implemented in Dendro