8.86. Label CAD Geometry
Group (Subgroup)
Surface Meshing (Geometry)
Description
This Filter accepts a Triangle Geometry and checks the connectivity of Triangles and assigns them region IDs in a mask accordingly as well as providing a count for the number of Triangles in each Region.
Note: Our connectivity is different from other connectivity algorithms, in that it is dependent on the dimensionality of the geometry it is run on. A triangle geometry is two dimensional thus it must share one edge with another triangle to be considered connected. Only one shared vertex will not be enough to count triangles as connected. See the following image for reference:
The image in question demonstrates what geometric shapes would be considered connected according to matching color scheme. The colors are relative to the shapes dimensionality. Thus the fact there is a yellow triangle and a yellow cube does not mean they are related.
1D Geometry: Two edges are considered connected if they share a vertex.
2D Geometry: Triangle and Quad Geometries are considered connected if they share an entire edge. As shown in the image above, Triangles 1 & 2 are connected while triangles 2 & 3 are not connected.
3D Geometry: Hexahedron/Tetrahedron: In the image above the hexahedrons 4,5, and 6 are not considered connected while 6 & 7 are considered connected.
Example Output
The image below shows a single STL file that contains 12 different geometries. This filter labeled each geometry with a unique “Region ID” and the visualization is colored by those “Region Ids”
Input Data Objects
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Triangle Geometry |
Geometry Selection |
Triangle |
The CAD Geometry to be labeled (TriangleGeom) |
Output Data Object(s)
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Region Ids |
ArrayCreation |
The triangle id array for indexing into triangle groupings |
|
Cell Feature Attribute Matrix Name |
DataObjectName |
The name of the Cell Feature Attribute Matrix that will hold information arrays about each group; created in the CAD geometry |
|
Number of Triangles Array Name |
DataObjectName |
The name of array created in the new AM that stores the number of triangles per group |
License & Copyright
Please see the description file distributed with this plugin.
DREAM3D-NX Help
If you need help, need to file a bug report or want to request a new feature, please head over to the DREAM3DNX-Issues GitHub site where the community of DREAM3D-NX users can help answer your questions.