ElInfo1d.cc 8.42 KB
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#include "ElInfo1d.h"
#include "BasisFunction.h"
#include "Element.h"
#include "Line.h"
#include "Triangle.h"
#include "Tetrahedron.h"
#include "FiniteElemSpace.h"
#include "Flag.h"
#include "MacroElement.h"
#include "Mesh.h"
#include "Global.h"
#include "FixVec.h"
#include "DOFVector.h"

namespace AMDiS {

  void ElInfo1d::fillMacroInfo(const MacroElement * mel)
  {
    FUNCNAME("ElInfo1d::fillMacroInfo");
    Element *nb;
    MacroElement *mnb;
    int i;

    macroElement_  = const_cast<MacroElement*>( mel);
    element_       = const_cast<Element*>( mel->getElement());
    parent_   = NULL;
    level_    = 0;

    int vertices = mesh_->getGeo(VERTEX);

    if (fillFlag_.isSet(Mesh::FILL_COORDS) || fillFlag_.isSet(Mesh::FILL_DET) ||
	fillFlag_.isSet(Mesh::FILL_GRD_LAMBDA))
      {
	for (i = 0; i < vertices; i++) 
	  {
	    coord_[i] = mel->coord[i];
	  }
      }

    //   if(fillFlag_.isSet(Mesh::FILL_DET) || fillFlag_.isSet(Mesh::FILL_GRD_LAMBDA)) {
    //     det = elGrdLambda(*Lambda);
    //   }

    if (fillFlag_.isSet(Mesh::FILL_NEIGH) || fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
      {
	WorldVector<double> oppC;
    
	int neighbours =  mesh_->getGeo(NEIGH);
	for (i = 0; i < neighbours; i++) 
	  {
	    nb = NULL;
	    if ((mnb = const_cast<MacroElement*>( mel->getNeighbour(i)))) 
	      {
		if (fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		  { 
		    oppC = mnb->coord[i];
		  }

		nb = const_cast<Element*>( mnb->getElement());

		while (!(nb->isLeaf()))  // make nb nearest element
		  {
		    if (fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		      { 
			if (nb->getNewCoord(-1)) {
			  oppC = *(nb->getNewCoord());
			} else {
			  oppC = (mel->coord[i] + oppC) * 0.5;
			}
		      }
		    nb = const_cast<Element*>( nb->getChild(1-i));
		  }

		if (fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		  { 
		    oppCoord_[i] = oppC;
		  }
	      }
	    neighbour_[i] = nb;
	    oppVertex_[i] = nb ? i : -1;
	  }
      }

    if (fillFlag_.isSet(Mesh::FILL_BOUND) ) {
      for (i = 0; i < vertices; i++)
	boundary_[i] = mel->getBoundary(i);

      for(i = 0; i < element_->getGeo(PROJECTION); i++) {
	projection_[i] = mel->getProjection(i);
      }
    }
  }

  /****************************************************************************/
  /*  compute gradients of basis functions on element; return the absulute    */
  /*  value of the determinante from the transformation to the reference      */
  /*  element                                                                 */
  /****************************************************************************/
  double ElInfo1d::calcGrdLambda(DimVec<WorldVector<double> >& grd_lam) const
  {
    FUNCNAME("ElInfo1d::calcGrdLambda\n");

    int i;
    double adet2;

    testFlag(Mesh::FILL_COORDS);

    WorldVector<double> e;

    e = coord_[1]; e -= coord_[0];
    adet2 = e*e;

    if (adet2 < 1.0E-15) {
      MSG("det*det = %lf\n", adet2);
      for (i = 0; i <= 1; i++)
	grd_lam[i] = 0.0;
    } else {
      grd_lam[1] = e * (1.0/adet2);
      grd_lam[0] = grd_lam[1] * (-1.0);
    }

    return sqrt(adet2);
  }

  const int ElInfo1d::worldToCoord(const WorldVector<double>& x,
				   DimVec<double>* lambda) const
  {
    FUNCNAME("ElInfo1d::worldToCoord");
    double lmin;
    double a = coord_[0][0];
    double length = (coord_[1][0] - a);
    int i, j, k;

    int dim = mesh_->getDim();

    static DimVec<double> vec(dim, NO_INIT);

    TEST_EXIT(lambda)("lambda must not be NULL\n");
    TEST_EXIT(dim==1)("dim!=1\n");
    TEST_EXIT(Global::getGeo(WORLD)==dim)("not yet for DIM != DIM_OF_WORLD\n");

    if (abs(length) < DBL_TOL) {
      ERROR_EXIT("length = %le; abort\n", length);
      return 0;
    }

    (*lambda)[1] = (x[0]-a)/length;
    (*lambda)[0] = 1.0 - (*lambda)[1];

    k = -1;
    lmin = 0.0;
    j = 0;
    for (i = 0; i <= dim; i++) {
      if ((*lambda)[i] < -1.E-5) {
	if ((*lambda)[i] < lmin) {
	  k = i;
	  lmin = (*lambda)[i];
	}
	j++;
      }
    }

    return k;
  }

  /****************************************************************************/
  /*  calculate a facenormal of edge side of a triangle with coordinates      */
  /*  coord; return the absulute value of the determinant from the           */
  /*  transformation to the reference element                                 */
  /****************************************************************************/
  double ElInfo1d::getNormal(int side, WorldVector<double> &normal) const
  {
    double det;
    normal = coord_[side] - coord_[(side + 1) % 2];
    det = norm(&normal);
    TEST_EXIT(det > 1.e-30)("det = 0 on side %d\n", side);
    normal *= 1.0/det;

    //   int dow = Global::getGeo(WORLD);
    //   double det = 0.0;
  
    //   if(dow == 1){
    //     normal[0] = side ? 1.0 : -1.0;
    //     det = 1.0;
    //   }
    //   else{ 
    //     normal = side ? coord_[1] - coord_[0] :  coord_[0] - coord_[1];
    //     det = norm(&normal);
    //     normal *= 1.0 / det;
    //     det = 1.0;
    //   }
 
    return(det);
  }


  /****************************************************************************/
  /*  calculate the normal of the element for dim of world = 2                */
  /*  return the absulute value of the determinant from the                   */
  /*  transformation to the reference element                                 */
  /****************************************************************************/
  double ElInfo1d::getElementNormal( WorldVector<double> &elementNormal) const
  {
    FUNCNAME("ElInfo::getElementNormal");
    double   det = 0.0;
    int dow = Global::getGeo(WORLD);

    TEST_EXIT(dow =  2)(" element normal only well defined for  DIM_OF_WORLD = DIM + 1 !!");

    elementNormal[0] = coord_[1][1] - coord_[0][1];
    elementNormal[1] = coord_[0][0] - coord_[1][0];

    det = norm(&elementNormal);

    TEST_EXIT(det > 1.e-30)("det = 0");

    elementNormal *= 1.0 / det;
    
    return(det);
  }


  void ElInfo1d::fillElInfo(int ichild, const ElInfo *elinfo_old)
  {
    FUNCNAME("ElInfo1d::fillElInfo");
    int i; //, j;
    Element *nb;
    Element *elem = elinfo_old->element_;

    TEST_EXIT(elem->getChild(0))("no children?\n");
    TEST_EXIT((element_ = const_cast<Element*>( elem->getChild(ichild))))
      ("missing child %d?\n", ichild);

    macroElement_   = elinfo_old->macroElement_;
    fillFlag_  = elinfo_old->fillFlag_;
    parent_    = elem;
    level_     = elinfo_old->level_ + 1;

    //int dow = Global::getGeo(WORLD);
    int neighbours = mesh_->getGeo(NEIGH);

    if (fillFlag_.isSet(Mesh::FILL_COORDS) || fillFlag_.isSet(Mesh::FILL_DET) ||
	fillFlag_.isSet(Mesh::FILL_GRD_LAMBDA))
      {
	const FixVec<WorldVector<double>, VERTEX> *old_coord = &(elinfo_old->coord_);

	coord_[ichild] = (*old_coord)[ichild];
	if (elem->getNewCoord(-1)) {
	  coord_[1-ichild] = *(elem->getNewCoord());
	} else {
	  coord_[1-ichild] = ((*old_coord)[0] + (*old_coord)[1]) * 0.5;
	}
      }

    //   if(fillFlag_.isSet(Mesh::FILL_DET) || fillFlag_.isSet(Mesh::FILL_GRD_LAMBDA)) {
    //     det = calcGrdLambda(*Lambda);
    //   }

    if (fillFlag_.isSet(Mesh::FILL_NEIGH) || fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
      {
	WorldVector<double> oppC;

	TEST_EXIT(fillFlag_.isSet(Mesh::FILL_COORDS))
	  ("FILL_OPP_COORDS only with FILL_COORDS\n");

	for (i = 0; i < neighbours; i++) 
	  {
	    if (i != ichild)
	      {
		nb = const_cast<Element*>( elem->getChild(1-ichild));  
		//	if (nb && fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		if ( fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		  {
		    oppC = elinfo_old->coord_[i];
		  }
	      }
	    else
	      {
		nb = const_cast<Element*>( elinfo_old->getNeighbour(i));

		if (nb && fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		  {
		    oppC = elinfo_old->oppCoord_[i];
		  }
	      }

	    if (nb)
	      {
		while (nb->getChild(0))  // make nb nearest element
		  {
		    if (fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		      { 
			if (nb->getNewCoord(-1)) {
			  oppC = *(nb->getNewCoord());
			} else {
			  oppC = (coord_[i] + oppC) * 0.5;
			}
		      }
		    nb = const_cast<Element*>( nb->getChild(1-i));
		  }

		if (fillFlag_.isSet(Mesh::FILL_OPP_COORDS))
		  { 
		    oppCoord_[i] = oppC;
		  }
	      }
	    neighbour_[i] = nb;
	    oppVertex_[i] = nb ? i : -1;
	  }
      }

    if (fillFlag_.isSet(Mesh::FILL_BOUND))
      {
	boundary_[ichild] = elinfo_old->getBoundary(ichild);
	boundary_[1-ichild] = INTERIOR;

	if(elinfo_old->getProjection(0) && 
	   elinfo_old->getProjection(0)->getType() == VOLUME_PROJECTION) 
	  {
	    projection_[0] = elinfo_old->getProjection(0);
	  }
      }

    return;
  }

}