VCG - Ridge Line
Description
The RidgeLine filter computes ridge lines of point (node) data. This filter operates on unstructured grid data and produces geometry output.
Details
Extracts ridgelines.
Input
vtkUnstructuredGrid
Output
Polygonal Mesh
Parameters
Name |
Description |
Values/Default |
Variant |
Non-planar faces are either decomposed into triangles and the intersections with the core lines are determined directly, or the intersections with the non-planar faces are determined using Newton iterations.
|
|
|
SmoothingRange |
Smoothing range for gradient computation.
|
1 |
|
ExplicitEigenvectors |
If enabled, eigenvectors are computed explicitly (recommended!).
|
1 |
|
ScalarMin |
Minimum scalar value. Segments with lower scalar value will be discarded.
|
0.0 |
|
HessExtrEigenvalMin |
Minimum absolute value of second derivative across ridge (used for suppressing flat ridges).
|
0.0 |
|
PCAsubdomMaxPerc |
The second largest absolute eigenvalue must not be larger than this percentage of the largest absolute eigenvalue.
|
0.0 |
|
MinimumNumberOfVertices |
Core line segments with fewer vertices than this parameter will be discared.
|
10 |
|
MaximumNumberOfExceptions |
Core line segments with more exceptions than this parameter will be discared.
|
3 |
|
MinStrength |
The minimal required ridge strength. Segments with lower strength will be discarded.
|
1.0 |
|
MaxAngle |
The maximal allowed angle between the vector and the core line tangent. Segments with larger angle will be discarded.
|
30.0 |
|
Installation Instructions
Authors
Martin Roth, Ronald Peikert, Filip Sadlo, Kai Sdeo, Philip Hausner
Acknowledgements