Voronoi on Mesh¶

https://github.com/nortikin/sverchok/assets/14288520/ecff1142-de97-438f-a3be-f609d0816b96

Dependencies¶

This node requires SciPy library to work.

Functionality¶

This node creates Voronoi diagram on a given mesh, from specified set of initial points (sites). More specifically, it subdivides the mesh into regions of such Voronoi diagram. It is possible to subdivide:

either surface of the mesh, generating a series of flat meshes,
or the volume of the mesh, generating a series of closed-body meshes. In this mode, it is required that the mesh represents a closed volume.

Inputs¶

This node has the following inputs:

Vertices. Vertices of the mesh to generate Voronoi diagram on. This input is mandatory.
Polygons. Faces of the mesh to generate Voronoi diagram on. This input is mandatory.

https://github.com/nortikin/sverchok/assets/14288520/5a6ecd49-9ae1-4422-98b6-211060a22420

Voronoi Sites. The points to generate Voronoi diagram for. Usually you want for this points to lie either inside the mesh or on it’s surface, but this is not necessary. This input is mandatory. If list of Voronoi sites is Zero length then source object will not processed and transfer it params to output sockets.

https://github.com/nortikin/sverchok/assets/14288520/4353aec1-e4f5-4cb4-a9ec-f3e8c6435c0b

Mask of sites. List of True/False or indexes. What Sites will be show in result.

https://github.com/nortikin/sverchok/assets/14288520/61bd23e3-3a8e-47e2-b18f-1c7272b71679

invert Invert list Mask of Sites.

https://github.com/nortikin/sverchok/assets/14288520/b8360826-c678-4b47-b783-3e05a71f1275

Spacing. Percent of space to leave between generated fragment meshes. Zero means do not leave any space, i.e. regions will fully cover initial mesh. The default value is 0. This input can consume either a single value per object, or a list of values per object - one value per site. In the later case, each value will be used for corresponding cell.

https://user-images.githubusercontent.com/14288520/202571726-e7ecbf0a-72ad-48bd-b3c5-cd800b86b524.gif

The list of values per object - one value per site:

https://user-images.githubusercontent.com/14288520/202572900-c82edfd3-6634-4425-b33a-b4f09f87ecc9.png

Parameters¶

This node has the following parameters:

Mode. The available options are:
- Split Volume. Split closed-volume mesh into smaller closed-volume mesh regions.
- Split Surface. Split the surface of a mesh into smaller flat meshes.
The default value is Split Volume.

https://user-images.githubusercontent.com/14288520/202573307-cd8f42e1-6909-47d0-bf37-9211dbafb69a.png

Correct normals. This parameter is available only when Mode parameter is set to Volume. If checked, then the node will make sure that all normals of generated meshes point outside. Otherwise, this is not guaranteed. Checked by default.

https://user-images.githubusercontent.com/14288520/202575356-5ece8f0e-4787-4d85-846e-c8fb525e732b.png

https://user-images.githubusercontent.com/14288520/202574847-5343b0d1-61f3-4313-a8a1-7efce49f1405.gif

Post processing. This defines nesting structure of result meshes. The available options are:
- Separate All Meshes. Separate the result meshes into individual meshes.
- Keep Source Meshes. Keep parts of the source meshes as source meshes.
- Join All Meshes. Join all results meshes into a single mesh.

https://github.com/nortikin/sverchok/assets/14288520/afa0b637-b0cb-4813-9f10-3e05cd607e02

Accuracy. This parameter is available in the N panel only. This defines the precision of mesh calculation (number of digits after decimal point). The default value is 6.

https://user-images.githubusercontent.com/14288520/202577600-9f0e8eb6-2782-4a3b-9e58-f915823c9dfa.png

Outputs¶

This node has the following outputs:

Vertices. Vertices of generated mesh.
Edges. Edges of generated mesh.
Faces. Faces of generated mesh.
Used Sites idx. Indices of sources sites for further using (after apply Mask of sites). (from sverchok 1.3-alpha-master)
Used Sites Verts. Values of used sites. Keep of source struct of input socket “Voronoi sites” lists (after apply Mask of sites). (from sverchok 1.3-alpha-master)
- Text-> Stethoscope