Options for sewing functions on model file or BRepData.
When sewing a model,
A3DSewBrepcannot always give a fully enclosed shape (a solid). Thus being an open shape, the resulting shape has no concrete inside or outside. This effect entirely depend on the design and accuracy of the originating models. In that case, the concept of face orientation is not relevant enough to determine inward and outward-oriented faces in the resulting representation item. When
m_bComputePreferredOpenShellOrientationis set to
A3D_TRUE, the sewing algorithm will try to infer a general faces orientation of the resulting shape even if it isn’t enclosed.
- Preferred Shell Orientation