desystestspring2 Class Reference

Two mass three spring system, fixed ends. More...

#include <desystestspring2.h>

Collaboration diagram for desystestspring2:

List of all members.

Public Member Functions
	desystestspring2 (doublec *xval_, doublec *wi_)
	integrator interface supported.
void	kset (doublec *k)
	Cleanup.
void	equ01 (double &Dz, doublec z, doublec x) const
	First mass offset's change in position.
void	equ02 (double &Dz, doublec z, doublec x) const
	Second mass offset's change in position.
void	operator++ ()
	integrator supports change of equation pointed to.
void	operator() (double &Dz, doublec z, doublec x) const
	dy for associated equation.
Public Attributes
doublec *	xval
	x value
doublec *	wi
	(wi[0],wi[1],wi[2],wi[3]) corresponds with (w0,w0',w1,w1')
double	ki [3]
	Spring constants.
uint	current
	Current equation.

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Detailed Description

Two mass three spring system, fixed ends.

Definition at line 10 of file desystestspring2.h.

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Constructor & Destructor Documentation

desystestspring2::desystestspring2	(	doublec *	xval_,
		doublec *	wi_
	)			[inline]

integrator interface supported.

Definition at line 25 of file desystestspring2.h.

    : xval(xval_), wi(wi_), current(0) {}

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Member Function Documentation

void desystestspring2::equ01	(	double &	Dz,
		doublec	z,
		doublec	x
	)			const

First mass offset's change in position.

Definition at line 21 of file desystestspring2.cpp.

Referenced by operator()().

{
  // (wi[0],wi[1],wi[2],wi[3]) corresponds with (w0,w0',w1,w1')
  // w0'' = k1*w1 - k1*w0 - k0*w0
  Dz = ki[1]*wi[2]-ki[1]*wi[0]-ki[0]*wi[0];
}

void desystestspring2::equ02	(	double &	Dz,
		doublec	z,
		doublec	x
	)			const

Second mass offset's change in position.

Definition at line 33 of file desystestspring2.cpp.

Referenced by operator()().

{
  // (wi[0],wi[1],wi[2],wi[3]) corresponds with (w0,w0',w1,w1')
  // w1'' = -k2*w1 - k1*w1 + k1*w0
  Dz = -ki[2]*wi[2]-ki[1]*wi[2]+ki[1]*wi[0];
}

void desystestspring2::kset

(

doublec *

k

)

Cleanup.

Set the spring constants.

Definition at line 13 of file desystestspring2.cpp.

References ki.

{
  ki[0] = k[0];
  ki[1] = k[1];
  ki[2] = k[2];
}

void desystestspring2::operator()	(	double &	Dz,
		doublec	z,
		doublec	x
	)			const [inline]

dy for associated equation.

Definition at line 43 of file desystestspring2.h.

References current, equ01(), and equ02().

  { 
    switch (current)
    {
      case 0: equ01(Dz,z,x); break;
      case 1: equ02(Dz,z,x); break;
    }
  }

void desystestspring2::operator++

(

)

[inline]

integrator supports change of equation pointed to.

Definition at line 40 of file desystestspring2.h.

References current.

    { ++current; current %= 2; }

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Member Data Documentation

uint desystestspring2::current

Current equation.

Definition at line 22 of file desystestspring2.h.

Referenced by operator()(), and operator++().

double desystestspring2::ki[3]

Spring constants.

Definition at line 20 of file desystestspring2.h.

Referenced by kset().

doublec* desystestspring2::wi

(wi[0],wi[1],wi[2],wi[3]) corresponds with (w0,w0',w1,w1')

Definition at line 18 of file desystestspring2.h.

doublec* desystestspring2::xval

x value

Definition at line 15 of file desystestspring2.h.

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The documentation for this class was generated from the following files:

• nintegration/desystestspring2.h
• nintegration/desystestspring2.cpp