PhysicsTools::Spline::Segment Struct Reference

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

float PhysicsTools::Spline::Segment::deriv

(

float

x

)

const

Definition at line 34 of file Spline.cc.

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

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;
  }

float PhysicsTools::Spline::Segment::eval

(

float

x

)

const

Definition at line 21 of file Spline.cc.

References coeffs, and createJobs::tmp.

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;
  }

float PhysicsTools::Spline::Segment::integral

(

float

x

)

const

Definition at line 45 of file Spline.cc.

References area, coeffs, and createJobs::tmp.

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;
  }

Member Data Documentation

float PhysicsTools::Spline::Segment::area

Definition at line 58 of file Spline.h.

Referenced by integral(), and PhysicsTools::Spline::set().

float PhysicsTools::Spline::Segment::coeffs[4]

Definition at line 57 of file Spline.h.

Referenced by deriv(), eval(), integral(), and PhysicsTools::Spline::set().