internal class describing a "segment" (between two x points) More...

Public Member Functions
float	deriv (float x) const

float	eval (float x) const

float	integral (float x) const

Public Attributes
float	area

float	coeffs [4]

Detailed Description

internal class describing a "segment" (between two x points)

Definition at line 56 of file Spline.h.

Member Function Documentation

◆ deriv()

float PhysicsTools::Spline::Segment::deriv ( float x ) const

Definition at line 34 of file Spline.cc.

References ztail::d, createJobs::tmp, and x.

Referenced by PhysicsTools::Spline::deriv().

                                           {
     float tmp;
     float d = 0.0;
     d += coeffs[1];
     tmp = x;
     d += coeffs[2] * tmp * 2.0;
     tmp *= x;
     d += coeffs[3] * tmp * 3.0;
     return d;
   }

◆ eval()

float PhysicsTools::Spline::Segment::eval ( float x ) const

Definition at line 21 of file Spline.cc.

References coeffs, createJobs::tmp, and x.

Referenced by PhysicsTools::Spline::eval().

                                          {
     float tmp;
     float y = 0.0;
     y += coeffs[0];
     tmp = x;
     y += coeffs[1] * tmp;
     tmp *= x;
     y += coeffs[2] * tmp;
     tmp *= x;
     y += coeffs[3] * tmp;
     return y;
   }

◆ integral()

float PhysicsTools::Spline::Segment::integral ( float x ) const

Definition at line 45 of file Spline.cc.

References PhysicsTools::Spline::area, createJobs::tmp, and x.

Referenced by PhysicsTools::Spline::set().

                                              {
     float tmp = x;
     float area = this->area;
     area += coeffs[0] * tmp;
     tmp *= x;
     area += coeffs[1] * tmp * (1.0 / 2.0);
     tmp *= x;
     area += coeffs[2] * tmp * (1.0 / 3.0);
     tmp *= x;
     area += coeffs[3] * tmp * (1.0 / 4.0);
     return area;
   }