JGEOMETRY3D::JOmega3D Class Reference

Direction set covering (part of) solid angle. More...

#include <JOmega3D.hh>

Inheritance diagram for JGEOMETRY3D::JOmega3D:

Public Member Functions
	JOmega3D ()
	Default constructor. More...
	JOmega3D (const JAngle3D &dir)
	Constructor. More...
	JOmega3D (const double grid)
	Constructor. More...
	JOmega3D (const JAngle3D &dir, const JAngleRange &theta, const double grid)
	Constructor. More...
void	configure (const JAngle3D &dir, const JAngleRange &theta, const double grid)
	Configure direction set. More...
int	find (const JAngle3D &dir) const
	Get index of direction closest to given direction. More...

Detailed Description

Direction set covering (part of) solid angle.

Definition at line 62 of file JOmega3D.hh.

Constructor & Destructor Documentation

JGEOMETRY3D::JOmega3D::JOmega3D ( )

inline

Default constructor.

Definition at line 69 of file JOmega3D.hh.

               :
      JOmega3D_t()
    {}

JGEOMETRY3D::JOmega3D::JOmega3D ( const JAngle3D &  dir )

inline

Constructor.

Parameters

dir

direction

Definition at line 79 of file JOmega3D.hh.

                                  :
      JOmega3D_t()
    {
      push_back(dir);
    }

JGEOMETRY3D::JOmega3D::JOmega3D ( const double  grid )

inline

Constructor.

Parameters

grid	angular step size [rad]

Definition at line 91 of file JOmega3D.hh.

                                :
      JOmega3D_t()
    {
      configure(JAngle3D(0.0,0.0), JAngleRange(0.0,PI), grid);
    }

JGEOMETRY3D::JOmega3D::JOmega3D ( const JAngle3D &  dir, const JAngleRange &  theta, const double  grid  )

inline

Constructor.

Parameters

dir	principal direction
theta	polar angle range [rad]
grid	angular step size [rad]

Definition at line 106 of file JOmega3D.hh.

                                      :
      JOmega3D_t()
    {
      configure(dir, theta, grid);
    }

Member Function Documentation

void JGEOMETRY3D::JOmega3D::configure ( const JAngle3D &  dir, const JAngleRange &  theta, const double  grid  )

inline

Configure direction set.

Parameters

dir	principal direction
theta	polar angle range [rad]
grid	angular step size [rad]

Definition at line 122 of file JOmega3D.hh.

    {
      clear();

      // sanity checks

      double thetaMin = theta.getLowerLimit();
      double thetaMax = theta.getUpperLimit();

      if (thetaMin < 0.0) { thetaMin = 0.0; }
      if (thetaMin > PI)  { thetaMin = PI; }
      if (thetaMax < 0.0) { thetaMax = 0.0; }
      if (thetaMax > PI)  { thetaMax = PI; }

      if (thetaMax > thetaMin) {
        
        const JRotation3D R(dir);

        const double rad  = thetaMax - thetaMin;
        const double bin  = rad / floor(rad/(1.4*grid) + 0.5);        // polar angle step size
        const double unit = 2.0 * sqrt(1.0 - cos(grid));              // azimuth angle unit step size
        
        for (double theta = thetaMin; theta < thetaMax + 0.5*bin; theta += bin) {
          
          double step;
          
          if (theta > 0.5*bin && PI - theta > 0.5*bin)
            step = PI / floor(PI*sin(theta)/unit + 0.5);              // polar angle dependent step size
          else
            step = 2.0*PI;                                            // pole

          for (double phi = 0.0; phi < 2.0*PI - 0.5*step; phi += step) {
            push_back(JDirection3D(JAngle3D(theta,phi)).rotate_back(R));
          }
        }
      }
    }

int JGEOMETRY3D::JOmega3D_t::find ( const JAngle3D &  dir ) const

inlineinherited

Get index of direction closest to given direction.

Parameters

dir

direction

Returns

index (-1 if error)

Definition at line 39 of file JOmega3D.hh.

    {
      double dot   = -1.0;
      int    index = -1;

      for (const_iterator i = this->begin(); i != this->end(); ++i) {

        const double x = dir.getDot(*i);
        
        if (x > dot) {
          dot   = x;
          index = std::distance(this->begin(), i);
        }
      }
     
      return index;
    }

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The documentation for this class was generated from the following file:

• JOmega3D.hh