#include <CSCSlantedWireGeometry.h>

Inheritance diagram for CSCSlantedWireGeometry:

Public Member Functions
CSCWireGeometry *	clone () const
	CSCSlantedWireGeometry (double wireSpacing, double yOfFirstWire, double narrow, double wide, double length, float wireAngle)
int	nearestWire (const LocalPoint &lp) const
float	wireAngle () const
float	yOfWire (float wire, float x=0.) const
virtual	~CSCSlantedWireGeometry ()
Private Attributes
float	cosWireAngle
float	sinWireAngle
float	theWireAngle
float	theWireOffset

Detailed Description

A concrete CSCWireGeometry in which wires are slanted, i.e. they have a fixed, non-zero angle w.r.t. local x axis.

Author:: Tim Cox

Definition at line 15 of file CSCSlantedWireGeometry.h.

Constructor & Destructor Documentation

virtual CSCSlantedWireGeometry::~CSCSlantedWireGeometry ( ) [inline, virtual]

Definition at line 17 of file CSCSlantedWireGeometry.h.

{}

CSCSlantedWireGeometry::CSCSlantedWireGeometry	(	double	wireSpacing,
		double	yOfFirstWire,
		double	narrow,
		double	wide,
		double	length,
		float	wireAngle
	)

Constructor from wire spacing and wire angle

Definition at line 8 of file CSCSlantedWireGeometry.cc.

References funct::cos(), cosWireAngle, LogTrace, funct::sin(), sinWireAngle, and theWireOffset.

Referenced by clone().

                                                                                               :
  CSCWireGeometry( wireSpacing, yOfFirstWire, narrow, wide, length ), theWireAngle( wireAngle ){
    cosWireAngle = cos( wireAngle );
    sinWireAngle = sin( wireAngle );
    theWireOffset = yOfFirstWire * cosWireAngle; 
    LogTrace("CSCWireGeometry|CSC") <<
      "CSCSlantedWireGeometry: constructed:\n" <<
      " wireSpacing = " << wireSpacing << 
      ", y1 = " << yOfFirstWire << 
      ", narrow_width = " << narrow << 
      ", wide_width = " << wide << 
      ", length = " << length << 
      ", wireAngle = " << wireAngle << 
      ", theWireOffset = " << theWireOffset;
}

Member Function Documentation

CSCWireGeometry* CSCSlantedWireGeometry::clone ( void ) const [inline, virtual]

Clone to handle correct copy of component objects referenced by base class pointer.

Implements CSCWireGeometry.

Definition at line 46 of file CSCSlantedWireGeometry.h.

References CSCSlantedWireGeometry().

                                 {
    return new CSCSlantedWireGeometry(*this);
  }

int CSCSlantedWireGeometry::nearestWire ( const LocalPoint & lp ) const [virtual]

The nearest (virtual) wire to a given LocalPoint. Beware that this wire might not exist or be read out!

Implements CSCWireGeometry.

Definition at line 25 of file CSCSlantedWireGeometry.cc.

References cosWireAngle, nint(), sinWireAngle, theWireOffset, CSCWireGeometry::wireSpacing(), PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::y().

                                                                  {
  // Return nearest wire number to input LocalPoint.
  // Beware this may not exist or be read out!

  // rotate point to an axis perp. to wires
  float yprime = lp.y() * cosWireAngle - lp.x() * sinWireAngle;

  // climb the ladder
  return 1 + nint( (yprime - theWireOffset) / wireSpacing() );
}

float CSCSlantedWireGeometry::wireAngle ( ) const [inline, virtual]

The angle of the wires w.r.t local x axis (in radians)

Implements CSCWireGeometry.

Definition at line 29 of file CSCSlantedWireGeometry.h.

References theWireAngle.

{ return theWireAngle; }

float CSCSlantedWireGeometry::yOfWire	(	float	wire,
		float	x = `0.`
	)		const `[virtual]`

Local y of a given wire 'number' (float) at given x

Implements CSCWireGeometry.

Definition at line 37 of file CSCSlantedWireGeometry.cc.

References cosWireAngle, sinWireAngle, theWireOffset, and CSCWireGeometry::wireSpacing().

                                                               {
  // Return local y of given wire, at given x

  // y in rotated frame with y axis perpendicular to wires...
  float yprime = theWireOffset + (wire-1.) * wireSpacing();
  // then y in usual (unrotated!) local xy frame...
  return ( yprime + x*sinWireAngle )/cosWireAngle;
}