CurvWithArcLength2DCache Class Reference

Class representing a curvature value that also caches two dimensional arc length to each layer in the CDC. More...

#include <StandardAxes.h>

Public Member Functions
	CurvWithArcLength2DCache (float curv)
	Make cache for one curvature value.
	operator float () const
	Unpack the curvature.
float	getArcLength2D (ILayer iCLayer, bool secondArm=false) const
	Return the two dimensional arc length to the given layer id.

Private Attributes
float	m_curv
	Memory for the curvature.
std::array< float, 56 >	m_arcLength2DByICLayer
	Memory for two dimensional arc length at each layer.
std::array< float, 56 >	m_secondaryArcLength2DByICLayer
	Memory for two dimensional arc length at each layer on the second arm.

Friends
std::ostream &	operator<< (std::ostream &output, const CurvWithArcLength2DCache &value)
	Output operator for debugging.

Detailed Description

Class representing a curvature value that also caches two dimensional arc length to each layer in the CDC.

Definition at line 44 of file StandardAxes.h.

Constructor & Destructor Documentation

CurvWithArcLength2DCache()

CurvWithArcLength2DCache ( float  curv )

explicit

Make cache for one curvature value.

Definition at line 18 of file StandardAxes.cc.

  : m_curv(curv)
  , m_arcLength2DByICLayer{{0}}
{
  CDCWireTopology& wireTopology = CDCWireTopology::getInstance();
 
  for (const CDCWireLayer& wireLayer : wireTopology.getWireLayers()) {
    ILayer iCLayer = wireLayer.getICLayer();
    double cylindricalR = (wireLayer.getOuterCylindricalR() + wireLayer.getInnerCylindricalR()) / 2;
    double factor = GeneralizedCircle::arcLengthFactor(cylindricalR, curv);
 
    // Fall back when the closest approach to the layer is the apogee
    double arcLength2D = cylindricalR * std::fmin(factor, M_PI);
    double r = 1.0 / fabs(m_curv);
 
    m_arcLength2DByICLayer[iCLayer] = arcLength2D;
    m_secondaryArcLength2DByICLayer[iCLayer] = 2 * M_PI * r - arcLength2D;
  }
}

Member Function Documentation

getArcLength2D()

float getArcLength2D ( ILayer  iCLayer, bool  secondArm = false  ) const

inline

Return the two dimensional arc length to the given layer id.

Definition at line 56 of file StandardAxes.h.

      {
        return secondArm ? m_secondaryArcLength2DByICLayer[iCLayer] : m_arcLength2DByICLayer[iCLayer];
      }

operator float()

operator float ( ) const

inlineexplicit

Unpack the curvature.

Definition at line 50 of file StandardAxes.h.

      {
        return m_curv;
      }

Friends And Related Function Documentation

operator<<

std::ostream & operator<< ( std::ostream &  output, const CurvWithArcLength2DCache &  value  )

friend

Output operator for debugging.

Definition at line 62 of file StandardAxes.h.

      {
        return output << value.m_curv;
      }

Member Data Documentation

m_arcLength2DByICLayer

std::array<float, 56> m_arcLength2DByICLayer

private

Memory for two dimensional arc length at each layer.

Definition at line 72 of file StandardAxes.h.

m_curv

float m_curv

private

Memory for the curvature.

Definition at line 69 of file StandardAxes.h.

m_secondaryArcLength2DByICLayer

std::array<float, 56> m_secondaryArcLength2DByICLayer

private

Memory for two dimensional arc length at each layer on the second arm.

Definition at line 75 of file StandardAxes.h.

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

• tracking/trackFindingCDC/hough/axes/include/StandardAxes.h
• tracking/trackFindingCDC/hough/axes/src/StandardAxes.cc