#include <TangentHelix.h>

Public Member Functions
int	charge (float magz)

TangentCircle	circle () const

double	curvatureError ()

GlobalVector	directionAtVertex ()

GlobalPoint	innerPoint () const

GlobalPoint	outerPoint () const

double	rho () const

	TangentHelix ()

	TangentHelix (const GlobalVector &direction, const GlobalPoint &innerPoint, const GlobalPoint &outerPoint)

	TangentHelix (const GlobalPoint &outerPoint, const GlobalPoint &innerPoint, const GlobalPoint &vertexPoint)
	Calculate Helix from 3 points. More...

	TangentHelix (const TangentHelix &primCircle, const GlobalPoint &outerPoint, const GlobalPoint &innerPoint)
	Calculate the parameters of the helix which pass by 2 points (innerPoint and outerPoint) and which is tangent to primHelix. More...

double	vertexError ()

GlobalPoint	vertexPoint () const

Private Attributes
TangentCircle	theCircle

GlobalVector	theDirectionAtVertex

GlobalPoint	theInnerPoint

GlobalPoint	theOuterPoint

GlobalPoint	theVertexPoint

Detailed Description

Definition at line 6 of file TangentHelix.h.

Constructor & Destructor Documentation

TangentHelix::TangentHelix ( )

inline

Definition at line 9 of file TangentHelix.h.

9 {}

TangentHelix::TangentHelix	(	const GlobalVector &	direction,
		const GlobalPoint &	innerPoint,
		const GlobalPoint &	outerPoint
	)

inline

Calculate the helix from 2 points on the circle (the vertex=innerPoint and the outerPoint) and the tangent direction at the inner point

Definition at line 13 of file TangentHelix.h.

                                                                                                                  : 
             theInnerPoint(innerPoint), theOuterPoint(outerPoint), theVertexPoint(innerPoint), theCircle(direction, innerPoint, outerPoint), 
             theDirectionAtVertex(direction) {}

TangentHelix::TangentHelix	(	const GlobalPoint &	outerPoint,
		const GlobalPoint &	innerPoint,
		const GlobalPoint &	vertexPoint
	)

inline

Calculate Helix from 3 points.

Definition at line 18 of file TangentHelix.h.

References theDirectionAtVertex.

                                                                                                                   : 
            theInnerPoint(innerPoint), theOuterPoint(outerPoint), theVertexPoint(vertexPoint), theCircle(outerPoint, innerPoint, vertexPoint) {
            theDirectionAtVertex = GlobalVector(1000,1000,1000);
        }

TangentHelix::TangentHelix	(	const TangentHelix &	primCircle,
		const GlobalPoint &	outerPoint,
		const GlobalPoint &	innerPoint
	)

Calculate the parameters of the helix which pass by 2 points (innerPoint and outerPoint) and which is tangent to primHelix.

Definition at line 3 of file TangentHelix.cc.

References mag(), theCircle, theDirectionAtVertex, theVertexPoint, TangentCircle::vertexPoint(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                                                                                        :
      theInnerPoint(innerPoint), theOuterPoint(outerPoint), theCircle(primCircle.circle(), outerPoint, innerPoint) {
 
    // Calculation of vertex.z :
    GlobalPoint inner_T( innerPoint.x() , innerPoint.y() , 0.0 );
    GlobalPoint outer_T( outerPoint.x() , outerPoint.y() , 0.0 );
    GlobalPoint vtx_T( theCircle.vertexPoint().x() , theCircle.vertexPoint().y() , 0.0 );
 
    double d1 = (inner_T - vtx_T).mag();
    double d = (inner_T - outer_T).mag();
 
    theVertexPoint = GlobalPoint(vtx_T.x() , vtx_T.y(), innerPoint.z() - (outerPoint.z() - innerPoint.z()) * d1 / d );
    theDirectionAtVertex = GlobalVector(1000, 1000, 1000);
 }

Member Function Documentation

int TangentHelix::charge ( float magz )

inline

Definition at line 36 of file TangentHelix.h.

References TangentCircle::charge(), and theCircle.

Referenced by SeedFromNuclearInteraction::stateWithError().

36 { return theCircle.charge(magz); }

TangentCircle::charge

int charge(float magz)

Definition: TangentCircle.cc:180

TangentHelix::theCircle

TangentCircle theCircle

Definition: TangentHelix.h:49

TangentCircle TangentHelix::circle ( ) const

inline

Definition at line 32 of file TangentHelix.h.

References theCircle.

32 { return theCircle; }

TangentHelix::theCircle

TangentCircle theCircle

Definition: TangentHelix.h:49

double TangentHelix::curvatureError ( )

inline

Definition at line 40 of file TangentHelix.h.

References TangentCircle::curvatureError(), and theCircle.

40 { return theCircle.curvatureError(); }

TangentCircle::curvatureError

double curvatureError()

Definition: TangentCircle.cc:167

TangentHelix::theCircle

TangentCircle theCircle

Definition: TangentHelix.h:49

GlobalVector TangentHelix::directionAtVertex ( )

Definition at line 18 of file TangentHelix.cc.

References dir, TangentCircle::directionAtVertex(), PV3DBase< T, PVType, FrameType >::mag(), theCircle, theDirectionAtVertex, theInnerPoint, theOuterPoint, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by SeedFromNuclearInteraction::stateWithError().

                                              {
 
    if(theDirectionAtVertex.z() > 999) {
       GlobalPoint inner_T( theInnerPoint.x() , theInnerPoint.y() , 0.0 );
       GlobalPoint outer_T( theOuterPoint.x() , theOuterPoint.y() , 0.0 );
       double p_z = (theOuterPoint.z() - theInnerPoint.z()) / (outer_T - inner_T).mag();
 
       GlobalVector dir_T = theCircle.directionAtVertex();
       GlobalVector dir( dir_T.x(), dir_T.y(), p_z);
 
       dir/=dir.mag();
       theDirectionAtVertex = dir;
     }
 
    return theDirectionAtVertex;
 }