EdgeHelper.cpp

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 * Redistributions in binary form must reproduce the above copyright notice,
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   software without specific prior written permission.
 
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
*/
 
#include "EdgeHelper.hpp"
 
template<unsigned SPACE_DIM>
EdgeHelper<SPACE_DIM>::EdgeHelper()
{
}
 
template<unsigned SPACE_DIM>
Edge<SPACE_DIM>* EdgeHelper<SPACE_DIM>::GetEdgeFromNodes(Node<SPACE_DIM>* pNodeA,
                                                         Node<SPACE_DIM>* pNodeB)
{
    auto edge_map_indices = Edge<SPACE_DIM>::GenerateMapIndex(pNodeA->GetIndex(), pNodeB->GetIndex());
 
    // Check that an edge hasn't been created already
    Edge<SPACE_DIM>* p_edge = nullptr;
 
    auto edge_iter = mEdgesMap.find(edge_map_indices);
    if (edge_iter == mEdgesMap.end() || edge_iter->second->IsDeleted())
    {
        mEdges.push_back(std::make_unique<Edge<SPACE_DIM>> (mEdges.size(), pNodeA, pNodeB));
        p_edge = mEdges.back().get();
        mEdgesMap[edge_map_indices] = p_edge;
    }
    else
    {
        p_edge = edge_iter->second;
        p_edge->SetNodes(pNodeA, pNodeB);
    }
 
    return p_edge;
}
 
template<unsigned SPACE_DIM>
Edge<SPACE_DIM> *
EdgeHelper<SPACE_DIM>::GetEdgeFromNodes(unsigned elementIndex,
                                        Node<SPACE_DIM>* pNodeA,
                                        Node<SPACE_DIM>* pNodeB)
{
    auto p_edge = GetEdgeFromNodes(pNodeA, pNodeB);
    p_edge->AddElement(elementIndex);
    return p_edge;
}
 
template<unsigned SPACE_DIM>
Edge<SPACE_DIM>* EdgeHelper<SPACE_DIM>::GetEdge(unsigned index) const
{
    assert(index < mEdges.size());
    return mEdges[index].get();
}
 
template<unsigned SPACE_DIM>
Edge<SPACE_DIM>* EdgeHelper<SPACE_DIM>::operator[](unsigned index) const
{
    assert(index < mEdges.size());
    return mEdges[index].get();
}
 
template<unsigned SPACE_DIM>
void EdgeHelper<SPACE_DIM>::RemoveDeletedEdges()
{
    /*
     * Remove any edges that have been marked for deletion and store all other
     * nodes in a temporary structure.
     */
    std::vector<std::unique_ptr<Edge<SPACE_DIM> > > live_edges;
 
    for (auto& p_edge : mEdges)
    {
      // An edge can be deleted if it is not contained in any elements
      if (p_edge->GetNumElements() != 0)
      {
          live_edges.push_back(std::move(p_edge));
      }
      /*
       * Note: there's no need to manually delete the edge, because the
       * unique_ptr automatically takes care of that when it goes out of scope.
       */
    }
 
    /*
     * Repopulate the edges vector, using std::move to efficiently transfer
     * ownership of the pointers.
     */
    mEdges = std::move(live_edges);
 
    // Reset the edge indices
    for (unsigned i = 0; i < this->mEdges.size(); ++i)
    {
        mEdges[i]->SetIndex(i);
    }
 
    UpdateEdgesMapKey();
}
 
template<unsigned SPACE_DIM>
void EdgeHelper<SPACE_DIM>::UpdateEdgesMapKey()
{
    mEdgesMap.clear();
 
    for (auto& p_edge : mEdges)
    {
        mEdgesMap[p_edge->GetMapIndex()] = p_edge.get();
    }
}
 
template<unsigned SPACE_DIM>
unsigned EdgeHelper<SPACE_DIM>::GetNumEdges() const
{
    return mEdges.size();
}
 
// Explicit instantiation
template class EdgeHelper<1>;
template class EdgeHelper<2>;
template class EdgeHelper<3>;