Thu, 01/15/2004 - 17:04
Forums:
I want to export OCC geometries to Open Inventor.
Therefor i use the OCC_COIN3D-viewer interface.
By exporting OCC exports each face of the shape as a SoIndexedTriangleStripSet.
It's no problem to merge the faces to a shape (IndexedTriangleStripSet) but:
The directions of the faces are always "wrong" - faces are directed along the pos. x, y, and z- axis but should be directed "outside" the shape.
Could anybody tell me howto analyse face directions of a shape - is there any function I didn't see till now (in OCC)
thank you for your support
Juergen
Fri, 01/16/2004 - 12:07
hello
have a look in the TopoDS_Shape.cdl file.
to check face orientation ::Orientation();
to get the oriented shape ::Oriented(TopAbs_Orientation).
I hope this will help you.
Jerome
Fri, 01/16/2004 - 13:07
Thank you, but -
there's still a problem
I replaced my orientation-settings by
m_pOCCShape.Orientation(TopAbs_EXTERNAL);
The value never changes , but the export produces the same results like a setting of TopAbs_FORWARD
(same OI verteices and indices)
Juergen