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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkQuadEdgeMeshEulerOperatorSplitFacetFunction_hxx
#define itkQuadEdgeMeshEulerOperatorSplitFacetFunction_hxx
#include "itkQuadEdgeMeshEulerOperatorSplitFacetFunction.h"
namespace itk
{
template< typename TMesh, typename TQEType >
typename QuadEdgeMeshEulerOperatorSplitFacetFunction< TMesh, TQEType >::OutputType
QuadEdgeMeshEulerOperatorSplitFacetFunction< TMesh, TQEType >::Evaluate(QEType *h, QEType *g)
{
//
// g->Dest() ---<----- X destPid --------- X //
// / g \ / \ \ //
// / \ dLnext \ \ //
// / \ / \ \ //
// / \ v ^ \ //
// / g->Left() \ / \ \ //
// X = X X newEdge X //
// \ h->Left() / \ \ / //
// \ / \ \ ^ //
// \ / \ \ / //
// \ / \ \ oLnext //
// \ h / \ \ / //
// X ----->--- h->Dest() X --------- orgPid //
//
if ( !h || !g )
{
itkDebugMacro("At least one of the Input is not an edge.");
return ( (QEType *)ITK_NULLPTR );
}
if ( !this->m_Mesh )
{
itkDebugMacro("No mesh present.");
return ( (QEType *)ITK_NULLPTR );
}
if ( h == g )
{
itkDebugMacro("Provided edges should be different.");
return ( (QEType *)ITK_NULLPTR );
}
if ( h->GetLeft() != g->GetLeft() )
{
itkDebugMacro("The edges are not around the same face.");
return ( (QEType *)ITK_NULLPTR );
}
if ( ( h->GetLnext() == g )
|| ( g->GetLnext() == h ) )
{
itkDebugMacro("Provided edges should NOT be consecutive.");
return ( (QEType *)ITK_NULLPTR );
}
typedef typename MeshType::VertexRefType VertexRefType;
this->m_Mesh->DeleteFace( h->GetLeft() );
VertexRefType orgPid = h->GetDestination();
VertexRefType destPid = g->GetDestination();
// Create an new isolated edge and set it's geometry:
EdgeCellType *newEdge = new EdgeCellType;
QEType * newEdgeGeom = newEdge->GetQEGeom();
// see the code of e.g. AddFace
newEdgeGeom->SetOrigin(orgPid);
newEdgeGeom->SetDestination(destPid);
// Insert newEdge at Org
QEType *oLnext = h->GetLnext();
oLnext->InsertAfterNextBorderEdgeWithUnsetLeft(newEdgeGeom);
// Insert newEdge at Dest
QEType *dLnext = g->GetLnext();
dLnext->InsertAfterNextBorderEdgeWithUnsetLeft( newEdgeGeom->GetSym() );
// Add the new edge to the container
this->m_Mesh->PushOnContainer(newEdge);
// Build two new faces
this->m_Mesh->AddFace(h);
this->m_Mesh->AddFace(g);
this->m_Mesh->Modified();
return ( newEdgeGeom );
}
}
#endif
// eof - itkQuadEdgeMeshEulerOperatorSplitFacetFunction.hxx
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