Panzer_IntrepidOrientation.hpp

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#ifndef __Panzer_IntrepidOrientation_hpp__
#define __Panzer_IntrepidOrientation_hpp__

#include "Intrepid2_Orientation.hpp"

#include "PanzerDiscFE_config.hpp"
#include "Panzer_ConnManager.hpp"
#include "Panzer_NodalFieldPattern.hpp"
#include "Panzer_UniqueGlobalIndexer.hpp"

namespace panzer {

  template <typename LocalOrdinal,typename GlobalOrdinal>
  void
  buildIntrepidOrientation(std::vector<Intrepid2::Orientation> & orientation,  
                           panzer::ConnManager<LocalOrdinal,GlobalOrdinal> & connMgr) {
    //const Teuchos::RCP<const panzer::UniqueGlobalIndexer<LocalOrdinal,GlobalOrdinal> > globalIndexer) {
    using Teuchos::rcp_dynamic_cast;
    using Teuchos::RCP;
    using Teuchos::rcp;

    orientation.clear();

    // Cast connMgr with template types
    //const auto connMgrBase = globalIndexer->getConnManagerBase();
    //const auto connMgr = rcp_dynamic_cast<ConnManager<LocalOrdinal,GlobalOrdinal> >(connMgrBase->noConnectivityClone());
    
    //TEUCHOS_TEST_FOR_EXCEPTION(connMgr == Teuchos::null,std::logic_error,
    //                           "panzer::buildIntrepidOrientation: Could not cast ConnManagerBase");
    
    // Retrive element blocks and its meta data
    const int numElementBlocks = connMgr.numElementBlocks();

    std::vector<std::string> elementBlockIds;
    std::vector<shards::CellTopology> elementBlockTopologies;
    
    connMgr.getElementBlockIds(elementBlockIds);
    connMgr.getElementBlockTopologies(elementBlockTopologies);

    TEUCHOS_TEST_FOR_EXCEPTION(numElementBlocks <= 0 &&
                               numElementBlocks != static_cast<int>(elementBlockIds.size()) &&
                               numElementBlocks != static_cast<int>(elementBlockTopologies.size()),
                               std::logic_error,
                               "panzer::buildIntrepidOrientation: Number of element blocks does not match to element block meta data");
    
    // Currently panzer support only one type of elements for whole mesh (use the first cell topology)
    const auto cellTopo = elementBlockTopologies.at(0);
    const int numVertexPerCell = cellTopo.getVertexCount();
    
    const auto fp = NodalFieldPattern(cellTopo);
    connMgr.buildConnectivity(fp);

    // Count and pre-alloc orientations
    int total_elems = 0;
    for (int i=0;i<numElementBlocks;++i) {
      total_elems += connMgr.getElementBlock(elementBlockIds.at(i)).size();
    }
    
    orientation.resize(total_elems);
    // Loop over element blocks
    for (int i=0;i<numElementBlocks;++i) {
      // get elements in a block
      const auto &elementBlock = connMgr.getElementBlock(elementBlockIds.at(i));
      
      const int numElementsPerBlock = elementBlock.size();

      // construct orientation information
      for (int c=0;c<numElementsPerBlock;++c) {
        const int localCellId = elementBlock.at(c);
        Kokkos::View<const GlobalOrdinal*, Kokkos::DefaultHostExecutionSpace>
          nodes(connMgr.getConnectivity(localCellId), numVertexPerCell);
        orientation[localCellId] = (Intrepid2::Orientation::getOrientation(cellTopo, nodes));
      }
    }
  }

  Teuchos::RCP<std::vector<Intrepid2::Orientation> > 
  buildIntrepidOrientation(const Teuchos::RCP<const panzer::UniqueGlobalIndexerBase> globalIndexer);
}

#endif