9.81. Extract Internal Surfaces From Triangle Geometry

Group (Subgroup)

Geometry

Description

This Filter extracts any Triangles from the supplied Triangle Geometry that contain any internal nodes, then uses these extracted Triangles to create a new Data Container with the reduced Triangle Geometry. This operation is the same as removing all Triangles that only lie of the outer surface of the supplied Triangle Geometry. The user must supply a “Node Type” Vertex Attribute Array that defines the type for each node of the Triangle Geometry. Node types may take the following values:

Quick Surface Mesh

Id Value	Node Type
2	Normal **Vertex
3	Triple Line
4	Quadruple Point
12	Normal Vertex on the outer surface
13	Triple Line on the outer surface
14	Quadruple Point on the outer surface

SurfaceNets Mesh

Id Value	Node Type
0	Normal **Vertex
3	Triple Line
4-8	Quadruple Point
13	Normal Vertex on the outer surface
14	Triple Line on the outer surface
15-18	Quadruple Point on the outer surface

This Filter has the effect of removing any Triangles that only contain Vertices whose node Id values fall outside of the min and max that the user sets. In general, this node type array is created when the original surface mesh is created.

It is unknown until runtime how the Geometry will be changed by removing certain Vertices and Triangles.

Input Triangle Geometry

Parameter Name	Parameter Type	Parameter Notes	Description
Triangle Geometry	Geometry Selection	Triangle	Path to the existing Triangle Geometry

Input Vertex Data

Parameter Name	Parameter Type	Parameter Notes	Description
Node Types Array	Array Selection	Allowed Types: int8 Comp. Shape: 1	Path to the Node Types array
Internal Surface Node Type Min & Max	Vector of Int8 Values	Order=Min,Max	The min and max (inclusive) Node Type values that distinguish an internal surface from an external surface

Output Data Object(s)

Parameter Name	Parameter Type	Parameter Notes	Description
Created Triangle Geometry Path	DataGroupCreation		Path to create the new Triangle Geometry
Vertex Data Attribute Matrix	DataObjectName		Created vertex data AttributeMatrix name
Face Data Attribute Matrix	DataObjectName		Created face data AttributeMatrix name

Optional Transferred Data

Parameter Name	Parameter Type	Parameter Notes	Description
Copy Vertex Arrays	MultiArraySelection		Paths to vertex-related DataArrays that should be copied to the new geometry
Copy Face Arrays	MultiArraySelection		Paths to face-related DataArrays that should be copied to the new geometry

Example Pipelines

License & Copyright

Please see the description file distributed with this plugin.