ParaView / PARAVIS improvements 2014: 2.6.3/2.6.4: Geometry & Mesh plug-ins in the ParaVis module

src/OCC2VTK/OCC2VTK_Tools.cxx

@@ -35,6 +35,12 @@
 #include <TopoDS.hxx>
 #include <TopTools_ListOfShape.hxx>
 
+
+#include <TopExp.hxx>
+#include <vtkAppendPolyData.h>
+#include <vtkPolyData.h>
+#include <BRepBuilderAPI_Copy.hxx>
+
 #define MAX2(X, Y)    (Abs(X) > Abs(Y) ? Abs(X) : Abs(Y))
 #define MAX3(X, Y, Z) (MAX2(MAX2(X,Y), Z))
 
@@ -159,4 +165,68 @@ namespace GEOM
       }
     }
   }
+
+  vtkPolyData* GetData(const TopoDS_Shape& theShape, float theDeflection) {
+    BRepBuilderAPI_Copy aCopy(theShape);
+    if(!aCopy.IsDone()) {
+      return 0;
+    }
+
+    TopoDS_Shape aShape = aCopy.Shape();
+    
+    try {
+      GEOM_VertexSource* myVertexSource = GEOM_VertexSource::New();
+      GEOM_EdgeSource* myIsolatedEdgeSource = GEOM_EdgeSource::New();
+      GEOM_EdgeSource* myOneFaceEdgeSource = GEOM_EdgeSource::New();
+      GEOM_EdgeSource* mySharedEdgeSource = GEOM_EdgeSource::New();
+      GEOM_WireframeFace* myWireframeFaceSource = GEOM_WireframeFace::New();
+      GEOM_ShadingFace* myShadingFaceSource = GEOM_ShadingFace::New();
+      
+      vtkAppendPolyData* myAppendFilter = vtkAppendPolyData::New();
+      myAppendFilter->AddInputConnection( myVertexSource->GetOutputPort() );
+      myAppendFilter->AddInputConnection( myIsolatedEdgeSource->GetOutputPort() );
+      myAppendFilter->AddInputConnection( myOneFaceEdgeSource->GetOutputPort() );
+      myAppendFilter->AddInputConnection( mySharedEdgeSource->GetOutputPort() );      
+      myAppendFilter->AddInputConnection( myShadingFaceSource->GetOutputPort() );
+      
+      bool anIsVector = false;
+      
+      GEOM::MeshShape( aShape, theDeflection );
+      TopExp_Explorer aVertexExp( aShape, TopAbs_VERTEX );
+      for( ; aVertexExp.More(); aVertexExp.Next() ) {
+	const TopoDS_Vertex& aVertex = TopoDS::Vertex( aVertexExp.Current() );
+	myVertexSource->AddVertex( aVertex );
+      }
+      
+      TopTools_IndexedDataMapOfShapeListOfShape anEdgeMap;
+      TopExp::MapShapesAndAncestors( aShape, TopAbs_EDGE, TopAbs_FACE, anEdgeMap );
+      
+      GEOM::SetShape( aShape,
+		      anEdgeMap,
+		      anIsVector,
+		      0,
+		      myIsolatedEdgeSource,
+		      myOneFaceEdgeSource,
+		      mySharedEdgeSource,
+		      myWireframeFaceSource,
+		      myShadingFaceSource );
+      
+      myAppendFilter->Update();
+
+      myVertexSource->Delete();
+      myIsolatedEdgeSource->Delete();
+      myOneFaceEdgeSource->Delete();
+      mySharedEdgeSource->Delete();
+      myWireframeFaceSource->Delete();
+      myShadingFaceSource->Delete();
+
+      vtkPolyData* ret = vtkPolyData::New();
+      ret->ShallowCopy(myAppendFilter->GetOutput());
+      myAppendFilter->Delete();
+      return ret;
+    }
+    catch(Standard_Failure) {
+      return 0;
+    }
+  }  
 }

src/OCC2VTK/OCC2VTK_Tools.h

@@ -29,7 +29,7 @@ class GEOM_VertexSource;
 class GEOM_EdgeSource;
 class GEOM_WireframeFace;
 class GEOM_ShadingFace;
-
+class vtkPolyData;
 namespace GEOM
 {
   // moved from GEOM_AssemblyBuilder
@@ -47,6 +47,8 @@ namespace GEOM
                                GEOM_EdgeSource* theSharedEdgeSource,
                                GEOM_WireframeFace* theWireframeFaceSource,
                                GEOM_ShadingFace* theShadingFaceSource);
+
+  OCC2VTK_EXPORT vtkPolyData* GetData(const TopoDS_Shape& theShape, float theDeflection);
 }
 
 #endif // OCC2VTK_TOOLS_H

src/VTKPlugin/VTKPlugin_ExportDriver.cxx

@@ -91,80 +91,16 @@ Standard_Integer VTKPlugin_ExportDriver::Execute( TFunction_Logbook& log ) const
   MESSAGE( "Export VTK into file " << aFileName );
   try
   {
-    GEOM_VertexSource* myVertexSource = GEOM_VertexSource::New();
-    GEOM_EdgeSource* myIsolatedEdgeSource = GEOM_EdgeSource::New();
-    GEOM_EdgeSource* myOneFaceEdgeSource = GEOM_EdgeSource::New();
-    GEOM_EdgeSource* mySharedEdgeSource = GEOM_EdgeSource::New();
-    GEOM_WireframeFace* myWireframeFaceSource = GEOM_WireframeFace::New();
-    GEOM_ShadingFace* myShadingFaceSource = GEOM_ShadingFace::New();
-
-    vtkAppendPolyData* myAppendFilter = vtkAppendPolyData::New();
-    myAppendFilter->AddInputConnection( myVertexSource->GetOutputPort() );
-    myAppendFilter->AddInputConnection( myIsolatedEdgeSource->GetOutputPort() );
-    myAppendFilter->AddInputConnection( myOneFaceEdgeSource->GetOutputPort() );
-    myAppendFilter->AddInputConnection( mySharedEdgeSource->GetOutputPort() );
-    //myAppendFilter->AddInputConnection( myWireframeFaceSource->GetOutputPort() ); // iso-lines are unnecessary
-    myAppendFilter->AddInputConnection( myShadingFaceSource->GetOutputPort() );
-
-    bool anIsVector = false;
-
-    // Is shape triangulated?
-    bool wasMeshed = true;
-    TopExp_Explorer ex;
-    TopLoc_Location aLoc;
-    for (ex.Init(aShape, TopAbs_FACE); ex.More(); ex.Next()) {
-      const TopoDS_Face& aFace = TopoDS::Face(ex.Current());
-      Handle(Poly_Triangulation) aPoly = BRep_Tool::Triangulation(aFace,aLoc);
-      if(aPoly.IsNull()) {
-        wasMeshed = false;
-        break;
-      }
-    }
-
-    GEOM::MeshShape( aShape, aDeflection );
-
-    TopExp_Explorer aVertexExp( aShape, TopAbs_VERTEX );
-    for( ; aVertexExp.More(); aVertexExp.Next() )
-    {
-      const TopoDS_Vertex& aVertex = TopoDS::Vertex( aVertexExp.Current() );
-      myVertexSource->AddVertex( aVertex );
-    }
-
-    TopTools_IndexedDataMapOfShapeListOfShape anEdgeMap;
-    TopExp::MapShapesAndAncestors( aShape, TopAbs_EDGE, TopAbs_FACE, anEdgeMap );
-
-    GEOM::SetShape( aShape,
-		    anEdgeMap,
-		    anIsVector,
-		    0,
-		    myIsolatedEdgeSource,
-		    myOneFaceEdgeSource,
-		    mySharedEdgeSource,
-		    myWireframeFaceSource,
-		    myShadingFaceSource );
-
-    myAppendFilter->Update();
-
     // Set "C" numeric locale to save numbers correctly
     Kernel_Utils::Localizer loc;
 
+    vtkPolyData* pd = GEOM::GetData( aShape, aDeflection );
     vtkPolyDataWriter* aWriter = vtkPolyDataWriter::New();    
-    aWriter->SetInputConnection( myAppendFilter->GetOutputPort() );
+    aWriter->SetInputData( pd );
     aWriter->SetFileName( aFileName.ToCString() );
     aWriter->Write();
     aWriter->Delete();
-
+    pd->Delete(); //instanciated by the GEOM::GetData(...) method
-    myVertexSource->Delete();
-    myIsolatedEdgeSource->Delete();
-    myOneFaceEdgeSource->Delete();
-    mySharedEdgeSource->Delete();
-    myWireframeFaceSource->Delete();
-    myShadingFaceSource->Delete();
-
-    myAppendFilter->Delete();
-
-    if(!wasMeshed)
-      BRepTools::Clean(aShape);
 
     return 1;
   }