/// <summary>
/// Reinitializes <paramref name="Phi"/> on <paramref name="reinitField"/> using the <paramref name="Accepted"/> cells as start value.
/// </summary>
/// <param name="Phi">Level Set</param>
/// <param name="Accepted">Given Field</param>
/// <param name="NegativeField">Field, on which the level set function is negative</param>
/// <param name="reinitField">Field , on which the level set function should be initialized</param>
public void FirstOrderReinit(SinglePhaseField Phi, CellMask Accepted, CellMask NegativeField, CellMask reinitField)
{
//Idea: Add options : FirstOrder, Elliptic, Geometric, Iterative. That is, include the existing Local Solvers.
CellMask ReinitField;
if (reinitField == null)
{
ReinitField = CellMask.GetFullMask(Phi.GridDat);
}
else
{
ReinitField = reinitField;
}
//Build Local Solver that solves the Eikonal in each cell.
FastMarching.ILocalSolver localSolver = new FastMarching.LocalMarcher.LocalMarcher_2DStructured(Phi.Basis);
//Build Global Solver that marches through all cells
FastMarching.GlobalMarcher.CellMarcher fastMarcher = new FastMarching.GlobalMarcher.CellMarcher(Phi.Basis, localSolver);
//Solve
fastMarcher.Reinit(Phi, Accepted, ReinitField);
//Invert Negative Domain that is part of ReinitField
Phi.Scale(-1, NegativeField.Intersect(ReinitField).Except(Accepted));
}
/// <summary>
/// get cut cells describing the boundary of this particle
/// </summary>
/// <param name="LsTrk"></param>
/// <returns></returns>
public CellMask cutCells_P(LevelSetTracker LsTrk)
{
// tolerance is very important
var radiusTolerance = radius_P + LsTrk.GridDat.Cells.h_minGlobal;// +2.0*Math.Sqrt(2*LsTrk.GridDat.Cells.h_minGlobal.Pow2());
CellMask cellCollection;
CellMask cells = null;
double alpha = -(currentAng_P[0]);
switch (m_shape)
{
case ParticleShape.spherical:
cells = CellMask.GetCellMask(LsTrk.GridDat, X => (-(X[0] - currentPos_P[0][0]).Pow2() + -(X[1] - currentPos_P[0][1]).Pow2() + radiusTolerance.Pow2()) > 0);
break;
case ParticleShape.elliptic:
double a = 3.0;
double b = 1.0;
cells = CellMask.GetCellMask(LsTrk.GridDat, X => - ((((X[0] - currentPos_P[0][0]) * Math.Cos(alpha) - (X[1] - currentPos_P[0][1]) * Math.Sin(alpha)).Pow2()) / length_P.Pow2()) + -(((X[0] - currentPos_P[0][0]) * Math.Sin(alpha) + (X[1] - currentPos_P[0][1]) * Math.Cos(alpha)).Pow2() / thickness_P.Pow2()) + radiusTolerance.Pow2() > 0);
break;
case ParticleShape.hippopede:
a = 4.0 * radiusTolerance.Pow2();
b = 1.0 * radiusTolerance.Pow2();
cells = CellMask.GetCellMask(LsTrk.GridDat, X => - ((((X[0] - currentPos_P[0][0]) * Math.Cos(alpha) - (X[1] - currentPos_P[0][1]) * Math.Sin(alpha)).Pow(2) + ((X[0] - currentPos_P[0][0]) * Math.Sin(alpha) + (X[1] - currentPos_P[0][1]) * Math.Cos(alpha)).Pow(2)).Pow2() - a * ((X[0] - currentPos_P[0][0]) * Math.Cos(alpha) - (X[1] - currentPos_P[0][1]) * Math.Sin(alpha)).Pow2() - b * ((X[0] - currentPos_P[0][0]) * Math.Sin(alpha) + (X[1] - currentPos_P[0][1]) * Math.Cos(alpha)).Pow2()) > 0);
break;
case ParticleShape.bean:
a = 4.0 * radiusTolerance.Pow2();
b = 1.0 * radiusTolerance.Pow2();
cells = CellMask.GetCellMask(LsTrk.GridDat, X => - ((((X[0] - currentPos_P[0][0]) * Math.Cos(alpha) - (X[1] - currentPos_P[0][1]) * Math.Sin(alpha)).Pow(2) + ((X[0] - currentPos_P[0][0]) * Math.Sin(alpha) + (X[1] - currentPos_P[0][1]) * Math.Cos(alpha)).Pow(2)).Pow2() - a * ((X[0] - currentPos_P[0][0]) * Math.Cos(alpha) - (X[1] - currentPos_P[0][1]) * Math.Sin(alpha)).Pow(3) - b * ((X[0] - currentPos_P[0][0]) * Math.Sin(alpha) + (X[1] - currentPos_P[0][1]) * Math.Cos(alpha)).Pow2()) > 0);
break;
case ParticleShape.squircle:
cells = CellMask.GetCellMask(LsTrk.GridDat, X => - ((((X[0] - currentPos_P[0][0]) * Math.Cos(alpha) - (X[1] - currentPos_P[0][1]) * Math.Sin(alpha)).Pow(4) + ((X[0] - currentPos_P[0][0]) * Math.Sin(alpha) + (X[1] - currentPos_P[0][1]) * Math.Cos(alpha)).Pow(4)) - radiusTolerance.Pow(4)) > 0);
break;
default:
throw new NotImplementedException("Shape is not implemented yet");
}
CellMask allCutCells = LsTrk.Regions.GetCutCellMask();
cellCollection = cells.Intersect(allCutCells);
return(cellCollection);
}
/// <summary>
/// get cut cells describing the boundary of this particle
/// </summary>
/// <param name="LsTrk"></param>
/// <returns></returns>
public CellMask CutCells_P(LevelSetTracker LsTrk)
{
BitArray CellArray = new BitArray(LsTrk.GridDat.Cells.NoOfLocalUpdatedCells);
MultidimensionalArray CellCenters = LsTrk.GridDat.Cells.CellCenter;
var h_min = LsTrk.Regions.GetCutCellSubGrid().h_minSubGrd;
for (int i = 0; i < CellArray.Length; i++)
{
CellArray[i] = Contains(new Vector(CellCenters[i, 0], CellCenters[i, 1]), 2 * h_min);
}
CellMask CutCells = new CellMask(LsTrk.GridDat, CellArray, MaskType.Logical);
CutCells = CutCells.Intersect(LsTrk.Regions.GetCutCellMask());
return(CutCells);
}
/// <summary>
/// get cut cells describing the boundary of this particle
/// </summary>
/// <param name="LsTrk"></param>
/// <returns></returns>
public CellMask CutCells_P(LevelSetTracker LsTrk)
{
BitArray CellArray = new BitArray(LsTrk.GridDat.Cells.NoOfLocalUpdatedCells);
MultidimensionalArray CellCenters = LsTrk.GridDat.Cells.CellCenter;
double h_min = LsTrk.GridDat.Cells.h_minGlobal;
double h_max = LsTrk.GridDat.Cells.h_maxGlobal;
for (int i = 0; i < CellArray.Length; i++)
{
CellArray[i] = Contains(new double[] { CellCenters[i, 0], CellCenters[i, 1] }, h_min, h_max, false);
}
CellMask CutCells = new CellMask(LsTrk.GridDat, CellArray, MaskType.Logical);
CutCells = CutCells.Intersect(LsTrk.Regions.GetCutCellMask());
return(CutCells);
}