ElInfo.cc 3.87 KB
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#include "ElInfo.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 {

  ElInfo::ElInfo(Mesh *aMesh) 
    : mesh_(aMesh),
      element_(NULL),
      parent_(NULL),
      macroElement_(NULL),
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      level(0),
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      iChild(0),
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      coord_(mesh_->getDim(), NO_INIT),
      boundary_(mesh_->getDim(), DEFAULT_VALUE, INTERIOR),
      projection_(mesh_->getDim(), NO_INIT),
      oppCoord_(mesh_->getDim(), NO_INIT),
      neighbour_(mesh_->getDim(), NO_INIT),
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      neighbourCoord_(mesh_->getDim(), NO_INIT),
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      oppVertex_(mesh_->getDim(), NO_INIT),
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      grdLambda(mesh_->getDim(), NO_INIT),
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      subElemCoordsMat(2, 2)
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  {
    projection_.set(NULL);
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    for (int i = 0; i < neighbourCoord_.getSize(); i++)
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      neighbourCoord_[i].init(mesh_->getDim());
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    dimOfWorld = Global::getGeo(WORLD);
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  }

  ElInfo::~ElInfo()
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  {}
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  void ElInfo::coordToWorld(const DimVec<double>& l, 
			    WorldVector<double>& w) const
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  {
    int dim = l.getSize() - 1;

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    double c = l[0];
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    for (int j = 0; j < dimOfWorld; j++)
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      w[j] = c * coord_[0][j];
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    int vertices = Global::getGeo(VERTEX, dim);
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    for (int i = 1; i < vertices; i++) {
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      c = l[i];
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      for (int j = 0; j < dimOfWorld; j++)
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	w[j] += c * coord_[i][j];
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    }
  }

  /****************************************************************************/
  /*  compute volume of an element                                            */
  /****************************************************************************/

  double ElInfo::calcDet() const
  {
    testFlag(Mesh::FILL_COORDS);
    return calcDet(coord_);
  }

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  double ElInfo::calcDet(const FixVec<WorldVector<double>, VERTEX> &coords) const
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  {
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    FUNCNAME("ElInfo::calcDet()");
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    int dim = coords.getSize() - 1;
    int dow = Global::getGeo(WORLD);

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    TEST_EXIT_DBG(dim <= dow)("dim > dow\n");
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    double det = 0.0;

    if (dim == 0)
      return 1.0;

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    switch (dow) {
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    case 1:
      det = coords[1][0] - coords[0][0];
      break;
    case 2:
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      if (dim == 1) {
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	WorldVector<double> e1;

	e1[0] = coords[1][0] - coords[0][0];
	e1[1] = coords[1][1] - coords[0][1];
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	det = norm(&e1);
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      } else {
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	det = (coords[1][0] - coords[0][0]) * (coords[2][1] - coords[0][1]) - 
	  (coords[1][1] - coords[0][1]) * (coords[2][0] - coords[0][0]);

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      }
      break;
    case 3: 
      {
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	WorldVector<double> e1, e2, e3, n;
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	for (int i = 0; i < dow; i++) {
	  e1[i] = coords[1][i] - coords[0][i];
	  if (dim > 1)
	    e2[i] = coords[2][i] - coords[0][i];
	  if (dim > 2)
	    e3[i] = coords[3][i] - coords[0][i];
	}
  
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	if (dim > 1) {
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	  n[0] = e1[1] * e2[2] - e1[2] * e2[1];
	  n[1] = e1[2] * e2[0] - e1[0] * e2[2];
	  n[2] = e1[0] * e2[1] - e1[1] * e2[0];
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	}
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	if (dim == 1) {
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	  det = norm(&e1);
	} else if (dim == 2) {
	  det = norm(&n);
	} else if (dim == 3) {
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	  det = n[0] * e3[0] + n[1] * e3[1] + n[2] * e3[2];
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	} else
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	  ERROR_EXIT("not yet for problem dimension = %d", dim);
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	break;
      } 
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    default:
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      ERROR_EXIT("not yet for Global::getGeo(WORLD) = %d", dow);
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    }
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    return abs(det);
  }

  void ElInfo::testFlag(const Flag& flags) const
  {
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    TEST_EXIT_DBG(fillFlag_.isSet(flags))("flag not set\n");
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  }


  void ElInfo::fillDetGrdLambda() 
  { 
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    if (fillFlag_.isSet(Mesh::FILL_GRD_LAMBDA)) {
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      det_ = calcGrdLambda(grdLambda);
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    } else {
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      if (fillFlag_.isSet(Mesh::FILL_DET))
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	det_ = calcDet();
    }
  }

  BoundaryType ElInfo::getBoundary(GeoIndex pos, int i)
  {
    static int indexOffset[3][3] = {
      { 0, 0, 0},
      { 3, 0, 0},
      {10, 4, 0}
    };

    int dim = mesh_->getDim();
    int posIndex = DIM_OF_INDEX(pos, dim);
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    int offset = indexOffset[dim - 1][posIndex];
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    return boundary_[offset + i];
  }

}