/// <summary>
/// Implements Get next photon
/// </summary>
/// <param name="tissue">tissue</param>
/// <returns>photon</returns>
public Photon GetNextPhoton(ITissue tissue)
{
double curved = 2 * Math.PI * _fiberRadius * _fiberHeightZ * _curvedSurfaceEfficiency;
double bottom = Math.PI * _fiberRadius * _fiberRadius * _bottomSurfaceEfficiency;
Direction finalDirection = SourceToolbox.GetDirectionForGivenPolarAzimuthalAngleRangeRandom(
SourceDefaults.DefaultHalfPolarAngleRange.Clone(),
SourceDefaults.DefaultAzimuthalAngleRange.Clone(),
Rng);
Position finalPosition = SourceDefaults.DefaultPosition.Clone();
if (_fiberRadius > 0.0)
{
if (Rng.NextDouble() > bottom / (curved + bottom)) //Consider
{ /* Curved surface */
// To utilize the final direction given above, we can assume a tube
// parallel to the y-axis. We can rotate it about the x-axis by pi/2
// to compute the new direction.
SourceToolbox.UpdateDirectionAfterRotatingAroundXAxis(-0.5 * Math.PI, finalDirection);
//Sample tube perimeter first to compute x and y coordinates
finalPosition = SourceToolbox.GetPositionAtCirclePerimeter(finalPosition,
_fiberRadius,
Rng);
//Sample tube height to compute z coordinate
finalPosition.Z = _fiberHeightZ * (Rng.NextDouble() - 0.5);
}
else
{ /* Bottom Surface */
//Shift finalPosition by _fiberHeightZ / 2
finalPosition = new Position(0.0, 0.0, _fiberHeightZ * 0.5);
//Sample the bottom face to find x, y coordinates of the emission
finalPosition = SourceToolbox.GetPositionInACircleRandomFlat(finalPosition,
0.0,
_fiberRadius,
Rng);
}
}
//Find the relevent polar and azimuthal pair for the direction
PolarAzimuthalAngles _rotationalAnglesOfPrincipalSourceAxis = SourceToolbox.GetPolarAzimuthalPairFromDirection(_newDirectionOfPrincipalSourceAxis);
//Translation and source rotation
SourceToolbox.UpdateDirectionPositionAfterGivenFlags(
ref finalPosition,
ref finalDirection,
_rotationalAnglesOfPrincipalSourceAxis,
_translationFromOrigin,
_rotationAndTranslationFlags);
var photon = new Photon(finalPosition, finalDirection, 1.0, tissue, _initialTissueRegionIndex, Rng);
return photon;
}
public void validate_static_method_updatedirectionafterrotatingaroundxaxis()
{
var dir = _direction.Clone();
SourceToolbox.UpdateDirectionAfterRotatingAroundXAxis(_angRot.XRotation, dir);
Assert.Less(Math.Abs(dir.Ux - _tp[88]), ACCEPTABLE_PRECISION);
Assert.Less(Math.Abs(dir.Uy - _tp[89]), ACCEPTABLE_PRECISION);
Assert.Less(Math.Abs(dir.Uz - _tp[90]), ACCEPTABLE_PRECISION);
}
/// <summary>
/// Implements Get next photon
/// </summary>
/// <param name="tissue">tissue</param>
/// <returns>photon</returns>
public Photon GetNextPhoton(ITissue tissue)
{
//sample angular distribution
Direction finalDirection = SourceToolbox.GetDirectionForGivenPolarAzimuthalAngleRangeRandom(
SourceDefaults.DefaultHalfPolarAngleRange.Clone(),
SourceDefaults.DefaultAzimuthalAngleRange.Clone(),
Rng);
Position finalPosition = SourceDefaults.DefaultPosition.Clone();
if (_tubeRadius > 0.0)
{
// To utilize the final direction given above, we can assume a tube
// parallel to the y-axis. We can rotate it about the x-axis by pi/2
// to compute the new direction.
SourceToolbox.UpdateDirectionAfterRotatingAroundXAxis(0.5 * Math.PI, finalDirection);
//Sample tube perimeter first to compute x and y coordinates
finalPosition = SourceToolbox.GetPositionAtCirclePerimeter(finalPosition,
_tubeRadius,
Rng);
//Sample tube height to compute z coordinate
finalPosition.Z = _tubeHeightZ * (Rng.NextDouble() - 0.5);
}
//Find the relevent polar and azimuthal pair for the direction
PolarAzimuthalAngles _rotationalAnglesOfPrincipalSourceAxis = SourceToolbox.GetPolarAzimuthalPairFromDirection(_newDirectionOfPrincipalSourceAxis);
//Translation and source rotation
SourceToolbox.UpdateDirectionPositionAfterGivenFlags(
ref finalPosition,
ref finalDirection,
_rotationalAnglesOfPrincipalSourceAxis,
_translationFromOrigin,
_rotationAndTranslationFlags);
var photon = new Photon(finalPosition, finalDirection, 1.0, tissue, _initialTissueRegionIndex, Rng);
return(photon);
}
/// <summary>
/// Implements Get next photon
/// </summary>
/// <param name="tissue">tissue</param>
/// <returns>photon</returns>
public Photon GetNextPhoton(ITissue tissue)
{
//Sample emitting side
String cSide = SelectEmittingSurface(
_cubeLengthX,
_cubeWidthY,
_cubeHeightZ,
Rng);
//sample angular distribution
Direction finalDirection = SourceToolbox.GetDirectionForGivenPolarAzimuthalAngleRangeRandom(
_polarAngleEmissionRange,
SourceDefaults.DefaultAzimuthalAngleRange.Clone(),
Rng);
Position tempPosition = null;
Position finalPosition = null;
switch (cSide)
{
case "xpos":
tempPosition = GetFinalPosition(_beamDiameterFWHM, _cubeHeightZ, _cubeWidthY, Rng);
finalPosition.X = 0.5 * _cubeLengthX;
finalPosition.Y = tempPosition.Y;
finalPosition.Z = tempPosition.X;
finalDirection = SourceToolbox.UpdateDirectionAfterRotatingAroundXAxis(0.5 * Math.PI, finalDirection);
break;
case "xneg":
tempPosition = GetFinalPosition(_beamDiameterFWHM, _cubeHeightZ, _cubeWidthY, Rng);
finalPosition.X = -0.5 * _cubeLengthX;
finalPosition.Y = tempPosition.Y;
finalPosition.Z = tempPosition.X;
finalDirection = SourceToolbox.UpdateDirectionAfterRotatingAroundXAxis(-0.5 * Math.PI, finalDirection);
break;
case "ypos":
tempPosition = GetFinalPosition(_beamDiameterFWHM, _cubeLengthX, _cubeHeightZ, Rng);
finalPosition.X = tempPosition.X;
finalPosition.Y = 0.5 * _cubeWidthY;
finalPosition.Z = tempPosition.Y;
finalDirection = SourceToolbox.UpdateDirectionAfterRotatingAroundYAxis(0.5 * Math.PI, finalDirection);
break;
case "yneg":
tempPosition = GetFinalPosition(_beamDiameterFWHM, _cubeLengthX, _cubeHeightZ, Rng);
finalPosition.X = tempPosition.X;
finalPosition.Y = -0.5 * _cubeWidthY;
finalPosition.Z = tempPosition.Y;
finalDirection = SourceToolbox.UpdateDirectionAfterRotatingAroundYAxis(-0.5 * Math.PI, finalDirection);
break;
case "zpos":
tempPosition = GetFinalPosition(_beamDiameterFWHM, _cubeLengthX, _cubeWidthY, Rng);
finalPosition.X = tempPosition.X;
finalPosition.Y = tempPosition.Y;
finalPosition.Z = 0.5 * _cubeHeightZ;
break;
case "zneg":
tempPosition = GetFinalPosition(_beamDiameterFWHM, _cubeLengthX, _cubeWidthY, Rng);
finalPosition.X = tempPosition.X;
finalPosition.Y = tempPosition.Y;
finalPosition.Z = -0.5 * _cubeHeightZ;
//reverse signs
finalDirection.Uz = -finalDirection.Uz;
break;
}
//Find the relevent polar and azimuthal pair for the direction
PolarAzimuthalAngles _rotationalAnglesOfPrincipalSourceAxis = SourceToolbox.GetPolarAzimuthalPairFromDirection(_newDirectionOfPrincipalSourceAxis);
//Translation and source rotation
SourceToolbox.UpdateDirectionPositionAfterGivenFlags(
ref finalPosition,
ref finalDirection,
_rotationalAnglesOfPrincipalSourceAxis,
_translationFromOrigin,
_rotationAndTranslationFlags);
var photon = new Photon(finalPosition, finalDirection, tissue, _initialTissueRegionIndex, Rng);
return(photon);
}