-// Copyright (C) 2007-2012 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2013 CEA/DEN, EDF R&D, OPEN CASCADE
//
// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
void DriverSTL_W_SMDS_Mesh::findVolumeTriangles()
{
- SMDS_VolumeTool myTool;
+ SMDS_VolumeTool theVolume;
SMDS_VolumeIteratorPtr vIt = myMesh->volumesIterator();
+ std::vector< const SMDS_MeshNode*> nodes;
while ( vIt->more() )
{
- myTool.Set( vIt->next() );
- for ( int iF = 0; iF < myTool.NbFaces(); ++iF )
- if ( myTool.IsFreeFace( iF ))
+ theVolume.Set( vIt->next(), /*ignoreCentralNodes=*/false );
+ for ( int iF = 0; iF < theVolume.NbFaces(); ++iF )
+ if ( theVolume.IsFreeFace( iF ))
{
- const SMDS_MeshNode** n = myTool.GetFaceNodes(iF);
- int nbN = myTool.NbFaceNodes(iF);
- std::vector< const SMDS_MeshNode*> nodes( n, n+nbN );
+ const SMDS_MeshNode** n = theVolume.GetFaceNodes(iF);
+ int nbN = theVolume.NbFaceNodes(iF);
+ nodes.assign( n, n+nbN );
if ( !myMesh->FindElement( nodes, SMDSAbs_Face, /*Nomedium=*/false))
{
- int nbTria = nbN - 2;
- for ( int iT = 0; iT < nbTria; ++iT )
+ if ( nbN == 9 && !theVolume.IsPoly() ) // facet is SMDSEntity_BiQuad_Quadrangle
{
- myVolumeTrias.push_back( new SMDS_FaceOfNodes( n[0], n[1+iT], n[2+iT] ));
+ int nbTria = nbN - 1;
+ for ( int iT = 0; iT < nbTria; ++iT )
+ myVolumeTrias.push_back( new SMDS_FaceOfNodes( n[8], n[0+iT], n[1+iT] ));
+ }
+ else
+ {
+ int nbTria = nbN - 2;
+ for ( int iT = 0; iT < nbTria; ++iT )
+ myVolumeTrias.push_back( new SMDS_FaceOfNodes( n[0], n[1+iT], n[2+iT] ));
}
}
}
// static methods
-static void writeInteger( const Standard_Integer& theVal,
- OSD_File& ofile )
+static void writeInteger( const Standard_Integer& theVal, OSD_File& ofile )
{
union {
Standard_Integer i;
char c[4];
- }u;
+ } u;
u.i = theVal;
return n;
}
+//================================================================================
+/*!
+ * \brief Return nb triangles in a decomposed mesh face
+ * \retval int - number of triangles
+ */
+//================================================================================
+
+static int getNbTriangles( const SMDS_MeshElement* face)
+{
+ // WARNING: counting triangles must be coherent with getTriangles()
+ switch ( face->GetEntityType() )
+ {
+ case SMDSEntity_BiQuad_Triangle:
+ case SMDSEntity_BiQuad_Quadrangle:
+ return face->NbNodes() - 1;
+ // case SMDSEntity_Triangle:
+ // case SMDSEntity_Quad_Triangle:
+ // case SMDSEntity_Quadrangle:
+ // case SMDSEntity_Quad_Quadrangle:
+ // case SMDSEntity_Polygon:
+ // case SMDSEntity_Quad_Polygon:
+ default:
+ return face->NbNodes() - 2;
+ }
+ return 0;
+}
+
//================================================================================
/*!
* \brief Decompose a mesh face into triangles
static int getTriangles( const SMDS_MeshElement* face,
const SMDS_MeshNode** nodes)
{
- // WARNING: implementation must be coherent with counting triangles in writeBinary()
- int nbN = face->NbCornerNodes();
- const int nbTria = nbN-2;
- for ( int i = 0; nbN > 1; --nbN )
+ // WARNING: decomposing into triangles must be coherent with getNbTriangles()
+ int nbTria, i = 0;
+ SMDS_NodeIteratorPtr nIt = face->interlacedNodesIterator();
+ nodes[ i++ ] = nIt->next();
+ nodes[ i++ ] = nIt->next();
+
+ const SMDSAbs_EntityType type = face->GetEntityType();
+ switch ( type )
{
- nodes[ i++ ] = face->GetNode( 0 );
- nodes[ i++ ] = face->GetNode( nbN-2 );
- nodes[ i++ ] = face->GetNode( nbN-1 );
+ case SMDSEntity_BiQuad_Triangle:
+ case SMDSEntity_BiQuad_Quadrangle:
+ nbTria = ( type == SMDSEntity_BiQuad_Triangle ) ? 6 : 8;
+ nodes[ i++ ] = face->GetNode( nbTria );
+ while ( i < 3*(nbTria-1) )
+ {
+ nodes[ i++ ] = nodes[ i-2 ];
+ nodes[ i++ ] = nIt->next();
+ nodes[ i++ ] = nodes[ 2 ];
+ }
+ nodes[ i++ ] = nodes[ i-2 ];
+ nodes[ i++ ] = nodes[ 0 ];
+ nodes[ i++ ] = nodes[ 2 ];
+ break;
+ default:
+ // case SMDSEntity_Triangle:
+ // case SMDSEntity_Quad_Triangle:
+ // case SMDSEntity_Quadrangle:
+ // case SMDSEntity_Quad_Quadrangle:
+ // case SMDSEntity_Polygon:
+ // case SMDSEntity_Quad_Polygon:
+ nbTria = face->NbNodes() - 2;
+ nodes[ i++ ] = nIt->next();
+ while ( i < 3*nbTria )
+ {
+ nodes[ i++ ] = nodes[ 0 ];
+ nodes[ i++ ] = nodes[ i-2 ];
+ nodes[ i++ ] = nIt->next();
+ }
+ break;
}
return nbTria;
}
return aResult;
}
+//================================================================================
+/*!
+ * \brief Writes all triangles in binary format
+ * \return Driver_Mesh::Status - DRS_FAIL if no file name is provided
+ */
+//================================================================================
+
Driver_Mesh::Status DriverSTL_W_SMDS_Mesh::writeBinary() const
{
Status aResult = DRS_OK;
aFile.Build(OSD_WriteOnly,OSD_Protection());
// we first count the number of triangles
- // WARNING: counting triangles must be coherent with getTriangles()
- int nbTri = 0;
- const SMDS_MeshInfo& info = myMesh->GetMeshInfo();
- nbTri += info.NbTriangles();
- nbTri += info.NbQuadrangles() * 2;
- nbTri += myVolumeTrias.size();
- if ( info.NbPolygons() > 0 )
+ int nbTri = myVolumeTrias.size();
{
SMDS_FaceIteratorPtr itFaces = myMesh->facesIterator();
- while ( itFaces->more() )
- {
+ while ( itFaces->more() ) {
const SMDS_MeshElement* aFace = itFaces->next();
- if ( aFace->IsPoly() )
- nbTri += aFace->NbNodes() - 2;
+ nbTri += getNbTriangles( aFace );
}
}
-
// char sval[80]; -- avoid writing not initialized memory
TCollection_AsciiString sval(LABEL_SIZE-1,' ');
aFile.Write((Standard_Address)sval.ToCString(),LABEL_SIZE);
