DOFMatrix.cc

#include <algorithm>
#include <png.h>
#include <boost/numeric/mtl/mtl.hpp>
#include "DOFMatrix.h"
#include "QPsiPhi.h"
#include "BasisFunction.h"
#include "Boundary.h"
#include "DOFAdmin.h"
#include "ElInfo.h"
#include "FiniteElemSpace.h"
#include "Mesh.h"
#include "DOFVector.h"
#include "Operator.h"
#include "BoundaryCondition.h"
#include "BoundaryManager.h"
#include "Assembler.h"

namespace AMDiS {

  using namespace mtl;

  DOFMatrix *DOFMatrix::traversePtr = NULL;

  DOFMatrix::DOFMatrix()
    : rowFESpace(NULL),
      colFESpace(NULL),
      elementMatrix(3, 3),
      nRow(0),
      nCol(0),
      inserter(NULL)
  {}

  DOFMatrix::DOFMatrix(const FiniteElemSpace* rowFESpace_,
		       const FiniteElemSpace* colFESpace_,
		       std::string name_)
    : rowFESpace(rowFESpace_),
      colFESpace(colFESpace_),
      name(name_), 
      coupleMatrix(false),
      inserter(NULL)
  {
    TEST_EXIT(rowFESpace)("no rowFESpace\n");
  
    if (!colFESpace)
      colFESpace = rowFESpace;

    if (rowFESpace && rowFESpace->getAdmin())
      (const_cast<DOFAdmin*>(rowFESpace->getAdmin()))->addDOFIndexed(this);

    boundaryManager = new BoundaryManager(rowFESpace_);

    nRow = rowFESpace->getBasisFcts()->getNumber();
    nCol = colFESpace->getBasisFcts()->getNumber();
    elementMatrix.change_dim(nRow, nCol);
    rowIndices.resize(nRow);
    colIndices.resize(nCol);

    applyDBCs.clear();
  }

  DOFMatrix::DOFMatrix(const DOFMatrix& rhs)
    : name(rhs.name + "copy")
  {
    *this = rhs;
    if (rowFESpace && rowFESpace->getAdmin())
      (const_cast<DOFAdmin*>( rowFESpace->getAdmin()))->addDOFIndexed(this);

    TEST_EXIT(rhs.inserter == 0)("Cannot copy during insertion");
    inserter= 0;
  }

  DOFMatrix::~DOFMatrix()
  {
    FUNCNAME("DOFMatrix::~DOFMatrix()");

    if (rowFESpace && rowFESpace->getAdmin())
      (const_cast<DOFAdmin*>(rowFESpace->getAdmin()))->removeDOFIndexed(this);
    if (boundaryManager) 
      delete boundaryManager;
    if (inserter) 
      delete inserter;
  }

  void DOFMatrix::print() const
  {
    FUNCNAME("DOFMatrix::print()");

    using mtl::tag::major; using mtl::tag::nz; using mtl::begin; using mtl::end;
    namespace traits= mtl::traits;
    typedef base_matrix_type Matrix;

    traits::row<Matrix>::type                                 row(matrix);
    traits::col<Matrix>::type                                 col(matrix);
    traits::const_value<Matrix>::type                         value(matrix);

    typedef traits::range_generator<major, Matrix>::type      cursor_type;
    typedef traits::range_generator<nz, cursor_type>::type    icursor_type;

    std::cout.precision(10);
    for (cursor_type cursor = begin<major>(matrix), cend = end<major>(matrix); cursor != cend; ++cursor) {
      for (icursor_type icursor = begin<nz>(cursor), icend = end<nz>(cursor); icursor != icend; ++icursor)
	if (value(*icursor) != 0.0)
	    std::cout << "(" << row(*icursor) << "," << col(*icursor) << "," << value(*icursor) << ") ";
      
      std::cout << "\n";
    }
  }

  bool DOFMatrix::symmetric()
  {
    FUNCNAME("DOFMatrix::symmetric()");

    double tol = 1e-5;

    using mtl::tag::major; using mtl::tag::nz; using mtl::begin; using mtl::end;
    namespace traits= mtl::traits;
    typedef base_matrix_type   Matrix;

    traits::row<Matrix>::type                                 row(matrix);
    traits::col<Matrix>::type                                 col(matrix);
    traits::const_value<Matrix>::type                         value(matrix);

    typedef traits::range_generator<major, Matrix>::type      cursor_type;
    typedef traits::range_generator<nz, cursor_type>::type    icursor_type;
    
    for (cursor_type cursor = begin<major>(matrix), cend = end<major>(matrix); cursor != cend; ++cursor)
      for (icursor_type icursor = begin<nz>(cursor), icend = end<nz>(cursor); icursor != icend; ++icursor)
	// Compare each non-zero entry with its transposed
	if (abs(value(*icursor) - matrix[col(*icursor)][row(*icursor)]) > tol)
	  return false;
    return true;
  }

  void DOFMatrix::test()
  {
    FUNCNAME("DOFMatrix::test()");

    int non_symmetric = !symmetric();

    if (non_symmetric)
      MSG("matrix `%s' not symmetric.\n", name.data());
    else
      MSG("matrix `%s' is symmetric.\n", name.data());
  }

  DOFMatrix& DOFMatrix::operator=(const DOFMatrix& rhs)
  {
    rowFESpace = rhs.rowFESpace;
    colFESpace = rhs.colFESpace;
    operators = rhs.operators;
    operatorFactor = rhs.operatorFactor;
    coupleMatrix = rhs.coupleMatrix;

    /// The matrix values may only be copyed, if there is no active insertion.
    if (rhs.inserter == 0 && inserter == 0)
      matrix = rhs.matrix;

    if (rhs.boundaryManager)
      boundaryManager = new BoundaryManager(*rhs.boundaryManager);
    else
      boundaryManager = NULL;
    
    nRow = rhs.nRow;
    nCol = rhs.nCol;
    elementMatrix.change_dim(nRow, nCol);

    return *this;
  }

  void DOFMatrix::addElementMatrix(double sign, 
				   const ElementMatrix& elMat, 
				   const BoundaryType *bound,
				   ElInfo* rowElInfo,
				   ElInfo* colElInfo,
				   bool add)
  {
    FUNCNAME("DOFMatrix::addElementMatrix()");

    TEST_EXIT_DBG(inserter)("DOFMatrix is not in insertion mode");
    inserter_type &ins= *inserter;

    // === Get indices mapping from local to global matrix indices. ===

    rowFESpace->getBasisFcts()->getLocalIndicesVec(rowElInfo->getElement(),
						   rowFESpace->getAdmin(),
						   &rowIndices);
    if (rowFESpace == colFESpace) {
      colIndices = rowIndices;
    } else {
      if (colElInfo) {
	colFESpace->getBasisFcts()->getLocalIndicesVec(colElInfo->getElement(),
						       colFESpace->getAdmin(),
						       &colIndices);
      } else {
	// If there is no colElInfo pointer, use rowElInfo the get the indices.
	colFESpace->getBasisFcts()->getLocalIndicesVec(rowElInfo->getElement(),
						       colFESpace->getAdmin(),
						       &colIndices);
      }
    }

    // === Add element matrix to the global matrix using the indices mapping. ===

    for (int i = 0; i < nRow; i++)  {   // for all rows of element matrix
      DegreeOfFreedom row = rowIndices[i];

      BoundaryCondition *condition = 
	bound ? boundaryManager->getBoundaryCondition(bound[i]) : NULL;

      if (condition && condition->isDirichlet()) {
	if (condition->applyBoundaryCondition()) {
#ifdef HAVE_PARALLEL_DOMAIN_AMDIS
	  if (rankDofs[row]) 
	    applyDBCs.insert(static_cast<int>(row));
#else
	  applyDBCs.insert(static_cast<int>(row));
#endif
	}
      } else {

	for (int j = 0; j < nCol; j++) {  // for all columns
	  DegreeOfFreedom col = colIndices[j];
	  double entry = elMat[i][j];
  
	  if (add)
	    ins[row][col] += sign * entry;
	  else
	    ins[row][col] = sign * entry;	
	}   
      }
    }
  }

  double DOFMatrix::logAcc(DegreeOfFreedom a, DegreeOfFreedom b) const
  {
    return matrix[a][b];
  }

  void DOFMatrix::freeDOFContent(int index)
  {}

  void DOFMatrix::assemble(double factor, ElInfo *elInfo, const BoundaryType *bound)
  {
    FUNCNAME("DOFMatrix::assemble()");

    set_to_zero(elementMatrix);

    std::vector<Operator*>::iterator it = operators.begin();
    std::vector<double*>::iterator factorIt = operatorFactor.begin();
    for (; it != operators.end(); ++it, ++factorIt)
      if ((*it)->getNeedDualTraverse() == false)
	(*it)->getElementMatrix(elInfo,	elementMatrix, *factorIt ? **factorIt : 1.0);

    addElementMatrix(factor, elementMatrix, bound, elInfo, NULL);   
  }

  void DOFMatrix::assemble(double factor, ElInfo *elInfo, const BoundaryType *bound,
			   Operator *op)
  {
      FUNCNAME("DOFMatrix::assemble()");

      TEST_EXIT_DBG(op)("No operator!\n");

      set_to_zero(elementMatrix);
      op->getElementMatrix(elInfo, elementMatrix, factor);
      addElementMatrix(factor, elementMatrix, bound, elInfo, NULL);
  }

  void DOFMatrix::assemble(double factor, 
			   ElInfo *rowElInfo, ElInfo *colElInfo,
			   ElInfo *smallElInfo, ElInfo *largeElInfo,
			   const BoundaryType *bound, Operator *op)
  {
    FUNCNAME("DOFMatrix::assemble()");

    if (!op && operators.size() == 0)
      return;

    set_to_zero(elementMatrix);

    if (op) {
      op->getElementMatrix(rowElInfo, colElInfo, smallElInfo, largeElInfo, 
			   elementMatrix);
    } else {
      std::vector<Operator*>::iterator it = operators.begin();
      std::vector<double*>::iterator factorIt = operatorFactor.begin();
      for (; it != operators.end(); ++it, ++factorIt) {
	(*it)->getElementMatrix(rowElInfo, colElInfo,
				smallElInfo, largeElInfo,
				elementMatrix, 
				*factorIt ? **factorIt : 1.0);	
      }      
    }

    addElementMatrix(factor, elementMatrix, bound, rowElInfo, colElInfo);       
  }

  void DOFMatrix::assemble2(double factor, 
			    ElInfo *mainElInfo, ElInfo *auxElInfo,
			    ElInfo *smallElInfo, ElInfo *largeElInfo,			    
			   const BoundaryType *bound, Operator *op)
  {
    FUNCNAME("DOFMatrix::assemble2()");

    if (!op && operators.size() == 0)
      return;

    set_to_zero(elementMatrix);
    
    if (op) {
      ERROR_EXIT("TODO");
//       op->getElementMatrix(rowElInfo, colElInfo, 
// 			   smallElInfo, largeElInfo,
// 			   elementMatrix);
    } else {
      std::vector<Operator*>::iterator it;
      std::vector<double*>::iterator factorIt;
      for(it = operators.begin(), factorIt = operatorFactor.begin();	
	   it != operators.end(); 
	   ++it, ++factorIt) {
	if ((*it)->getNeedDualTraverse()) {
	  (*it)->getElementMatrix(mainElInfo, auxElInfo,
				  smallElInfo, largeElInfo,
				  elementMatrix, 
				  *factorIt ? **factorIt : 1.0);
	}
      }      
    }

    addElementMatrix(factor, elementMatrix, bound, mainElInfo, NULL);       
  }

  void DOFMatrix::finishAssembling()
  {
    // call the operatos cleanup procedures
    for (std::vector<Operator*>::iterator it = operators.begin();
	 it != operators.end(); ++it)
      (*it)->finishAssembling();
  }

  // Should work as before
  Flag DOFMatrix::getAssembleFlag()
  {
    Flag fillFlag(0);
    for (std::vector<Operator*>::iterator op = operators.begin(); 
	 op != operators.end(); ++op)
      fillFlag |= (*op)->getFillFlag();

    return fillFlag;
  }

  void DOFMatrix::axpy(double a, const DOFMatrix& x, const DOFMatrix& y)
  {
    matrix+= a * x.matrix + y.matrix;
  }


  void DOFMatrix::scal(double b) 
  {
    matrix*= b;
  }

  void DOFMatrix::addOperator(Operator *op, double* factor, double* estFactor) 
  { 
    operators.push_back(op);
    operatorFactor.push_back(factor);
    operatorEstFactor.push_back(estFactor);
  }

  void DOFMatrix::copy(const DOFMatrix& rhs) 
  {
    matrix= rhs.matrix;
  }

  void DOFMatrix::removeRowsWithDBC(std::set<int> *rows)
  {      
    inserter_type &ins= *inserter;
   
    for (std::set<int>::iterator it = rows->begin(); it != rows->end(); ++it)
      ins[*it][*it] = 1.0;

    rows->clear();
  }

  int DOFMatrix::memsize() 
  {   
    return (num_rows(matrix) + matrix.nnz()) * sizeof(base_matrix_type::size_type)
      + matrix.nnz() * sizeof(base_matrix_type::value_type);
  }

}