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vtk-m/docs/changelog/orient-normals.md
Allison Vacanti 91e7c4d0b9 Add orientation and winding options to SurfaceNormals.
2019-08-01 11:02:13 -04:00

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SurfaceNormals filter can now orient normals.

The OrientNormals worklet has been added to the SurfaceNormals filter, and is enabled by turning on the AutoOrientNormals option. This feature ensures that all normals generated by the filter will point out of the dataset (or inward if the FlipNormals option is true). In addition, SurfaceNormals now has a Consistency option that forces all triangle windings to be consistent with the cell normal direction (the cell points are specified in counter-clockwise order around the normal).

This functionality is provided by the following new worklets:

  • OrientNormals
    • RunOrientCellNormals
    • RunOrientPointNormals
    • RunOrientPointAndCellNormals
    • RunFlipNormals
  • TriangleWinding