vtk-m/docs/changelog/orient-normals.md
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