Geometry/CSCGeometry/src/CSCSlantedWireGeometry.cc - master - githubmirror/cmssw

Geometry/CSCGeometry/src/CSCSlantedWireGeometry.cc

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11 май 2019, 12:09

11 май 2019, 12:0902cea70

#include <Geometry/CSCGeometry/src/CSCSlantedWireGeometry.h>
#include <Geometry/CSCGeometry/interface/nint.h>

#include <FWCore/MessageLogger/interface/MessageLogger.h>

#include <cmath>

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

int CSCSlantedWireGeometry::nearestWire(const LocalPoint& lp) const {
  // 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::yOfWire(float wire, float x) const {
  // 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;
}