#include <ProjLib.hxx>
#include <ElSLib.hxx>
+#include <Prs3d.hxx>
+
#include <vector>
#include <sstream>
#include <algorithm>
}
}
-//=======================================================================
-//function : CheckTriangulation
-//purpose :
-//=======================================================================
-bool GEOMUtils::CheckTriangulation (const TopoDS_Shape& aShape)
-{
- bool isTriangulation = true;
-
- TopExp_Explorer exp (aShape, TopAbs_FACE);
- if (exp.More())
- {
- TopLoc_Location aTopLoc;
- Handle(Poly_Triangulation) aTRF;
- aTRF = BRep_Tool::Triangulation(TopoDS::Face(exp.Current()), aTopLoc);
- if (aTRF.IsNull()) {
- isTriangulation = false;
- }
- }
- else // no faces, try edges
- {
- TopExp_Explorer expe (aShape, TopAbs_EDGE);
- if (!expe.More()) {
- return false;
- }
- TopLoc_Location aLoc;
- Handle(Poly_Polygon3D) aPE = BRep_Tool::Polygon3D(TopoDS::Edge(expe.Current()), aLoc);
- if (aPE.IsNull()) {
- isTriangulation = false;
- }
- }
-
- if (!isTriangulation) {
- // calculate deflection
- Standard_Real aDeviationCoefficient = 0.001;
-
- Bnd_Box B;
- BRepBndLib::Add(aShape, B);
- Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax;
- B.Get(aXmin, aYmin, aZmin, aXmax, aYmax, aZmax);
-
- Standard_Real dx = aXmax - aXmin, dy = aYmax - aYmin, dz = aZmax - aZmin;
- Standard_Real aDeflection = Max(Max(dx, dy), dz) * aDeviationCoefficient * 4;
- Standard_Real aHLRAngle = 0.349066;
-
- BRepMesh_IncrementalMesh Inc (aShape, aDeflection, Standard_False, aHLRAngle);
- }
-
- return true;
-}
-
//=======================================================================
//function : GetTypeOfSimplePart
//purpose :
return result;
}
-void GEOMUtils::MeshShape( const TopoDS_Shape shape,
- double deflection, bool theForced )
+//=======================================================================
+//function : DefaultDeflection
+//purpose :
+//=======================================================================
+double GEOMUtils::DefaultDeflection()
+{
+ return 0.001;
+}
+
+//=======================================================================
+//function : CanBeMeshed
+//purpose :
+//=======================================================================
+static bool GEOMUtils_CanBeMeshed (const TopoDS_Shape& theShape,
+ const bool theCheckMesh,
+ bool& theHasMesh)
{
- Standard_Real aDeflection = ( deflection <= 0 ) ? DefaultDeflection() : deflection;
-
// Is shape triangulated?
- Standard_Boolean alreadyMeshed = true;
- TopExp_Explorer ex;
+ theHasMesh = true;
+
+ TopExp_Explorer ex (theShape, TopAbs_FACE);
TopLoc_Location aLoc;
- for ( ex.Init( shape, TopAbs_FACE ); ex.More() && alreadyMeshed; ex.Next() ) {
- const TopoDS_Face& aFace = TopoDS::Face( ex.Current() );
- Handle(Poly_Triangulation) aPoly = BRep_Tool::Triangulation( aFace, aLoc );
- alreadyMeshed = !aPoly.IsNull();
+ if (ex.More()) {
+ if (theCheckMesh) {
+ for ( ; ex.More() && theHasMesh; ex.Next() ) {
+ const TopoDS_Face& aFace = TopoDS::Face( ex.Current() );
+ Handle(Poly_Triangulation) aPoly = BRep_Tool::Triangulation( aFace, aLoc );
+ theHasMesh = !aPoly.IsNull();
+ }
+ }
}
-
- if ( !alreadyMeshed || theForced ) {
+ else { // no faces, try edges
+ ex.Init(theShape, TopAbs_EDGE);
+ if (!ex.More()) {
+ return false; // nothing to mesh
+ }
+ if (theCheckMesh) {
+ for ( ; ex.More() && theHasMesh; ex.Next() ) {
+ Handle(Poly_Polygon3D) aPE = BRep_Tool::Polygon3D(TopoDS::Edge(ex.Current()), aLoc);
+ theHasMesh = !aPE.IsNull();
+ }
+ }
+ }
+
+ return true;
+}
+
+//=======================================================================
+//function : MeshShape
+//purpose :
+//=======================================================================
+bool GEOMUtils::MeshShape( const TopoDS_Shape theShape,
+ const double theDeflection,
+ const bool theForced,
+ const double theAngleDeflection,
+ const bool isRelative,
+ const bool doPostCheck)
+{
+ Standard_Real aDeflection = (theDeflection <= 0) ? DefaultDeflection() : theDeflection;
+
+ // Is shape triangulated?
+ bool alreadyMeshed = true;
+ if (!GEOMUtils_CanBeMeshed (theShape, /*theCheckMesh*/true, alreadyMeshed))
+ return false;
+
+ if (alreadyMeshed && !theForced)
+ return true;
+
+ if (isRelative) {
// Compute bounding box
Bnd_Box B;
- BRepBndLib::Add( shape, B );
- if ( B.IsVoid() )
- return; // NPAL15983 (Bug when displaying empty groups)
- Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax;
- B.Get( aXmin, aYmin, aZmin, aXmax, aYmax, aZmax );
-
- // This magic line comes from Prs3d_ShadedShape.gxx in OCCT
- aDeflection = MAX3(aXmax-aXmin, aYmax-aYmin, aZmax-aZmin) * aDeflection * 4;
-
- // Clean triangulation before compute incremental mesh
- BRepTools::Clean( shape );
-
- // Compute triangulation
- BRepMesh_IncrementalMesh mesh( shape, aDeflection );
+ BRepBndLib::Add(theShape, B);
+ if (B.IsVoid())
+ return false; // NPAL15983 (Bug when displaying empty groups)
+
+ Standard_Real aDeviationCoeff = aDeflection;
+ Standard_Real aMaxChordialDeviation = aDeflection;
+ aDeflection = Prs3d::GetDeflection(B, aDeviationCoeff, aMaxChordialDeviation);
}
+
+ // Clean triangulation before compute incremental mesh
+ BRepTools::Clean(theShape);
+
+ // Compute triangulation
+ BRepMesh_IncrementalMesh mesh (theShape, aDeflection, Standard_False, theAngleDeflection);
+
+ if (!doPostCheck)
+ return true;
+
+ if (!mesh.IsDone())
+ return false;
+
+ GEOMUtils_CanBeMeshed(theShape, /*theCheckMesh*/true, alreadyMeshed);
+ return alreadyMeshed;
}
-double GEOMUtils::DefaultDeflection()
+//=======================================================================
+//function : CheckTriangulation
+//purpose :
+//=======================================================================
+bool GEOMUtils::CheckTriangulation (const TopoDS_Shape& theShape)
{
- return 0.001;
+ Standard_Real aHLRAngle = 0.349066;
+ return MeshShape(theShape, DefaultDeflection(), false, aHLRAngle);
}
//=======================================================================
