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47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
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#ifndef FILE_OCCAUXFUNCTIONS
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#define FILE_OCCAUXFUNCTIONS
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// Philippose - 14/03/2009
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// Auxiliary functions for OCC Geometry
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// Use this file and the corresponding ".cpp"
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// file to add miscellaneous functionality
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// to the OpenCascade Geometry support in Netgen
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namespace netgen
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{
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/*! \brief Automatically assign boundary conditions for OCC meshes
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This function allows the boundary condition numbers of a
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mesh created using an OpenCascade (STEP / IGES) geometry
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to be assigned automatically.
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The boundary conditions are assigned based on the face
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colour information (if any) contained in the geometry.
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Currently the following process is used to assign the BC Properties:
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- Extract all the colours present in the OCC Geometry
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- Use colour index 0 (zero) for all faces with no colour defined
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- Calculate the number of faces of the surface mesh for each colour
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- Sort the number of surface elements in ascending order, with the
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colour indices as a slave
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- Use the indices of the sorted array as the BC property number
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Example: If there are 3 colours, present in the file and the number
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of surface elements for each colour are:
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- Colour 0: 8500
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- Colour 1: 120
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- Colour 2: 2200
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- Colour 3: 575
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The above is sorted in ascending order and assigned as BC Properties:
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- BC Prop 0: 120 : Colour 1
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- BC Prop 1: 575 : Colour 3
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- BC Prop 2: 2200 : Colour 2
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- BC Prop 3: 8500 : Colour 0 (no colour defined)
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*/
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extern void OCCAutoColourBcProps(Mesh & mesh, OCCGeometry & occgeometry);
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}
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#endif
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