library: libRooFit
#include "RooGraphSpring.h"

RooGraphSpring

class description - header file - source file - inheritance tree (.pdf)

class RooGraphSpring : public TObject

Inheritance Chart:

TObject

RooGraphSpring


    public:

                      RooGraphSpring()
                      RooGraphSpring(RooGraphNode* n1, RooGraphNode* n2)
                      RooGraphSpring(const RooGraphSpring&)
                      ~RooGraphSpring()
       static TClass* Class()
                 void Connect(RooGraphNode* n1, RooGraphNode* n2)
        RooGraphNode* GetEnd()
               double GetGraphLength()
               double GetInitialDistance()
               double GetLength()
               double GetSpringConstant()
               double GetSpringD2Energy(char m)
               double GetSpringDEnergy(char m)
               double GetSpringDxyEnergy()
        RooGraphNode* GetStart()
               double GetX1()
               double GetX2()
               double GetY1()
               double GetY2()
      virtual TClass* IsA() const
      RooGraphSpring& operator=(const RooGraphSpring&)
                 void print()
                 void read(ifstream& file)
                 void Set1stNode(RooGraphNode* n1)
                 void Set2ndNode(RooGraphNode* n2)
                 void SetGraphLength(double length)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)
                 void SwitchNodes()

Data Members

    private:

      RooGraphNode* fn1           nodes the edge
      RooGraphNode* fn2           connects together
             double fgraphlength

Class Description

RooGraphSpring:                                                            
                                                                           
The spring class is a subset of node class and a spring can only be created
if there are two nodes to connect it to. It is not drawn to the canvas, but
is used to determine the energy of each node and thus can be used to reduce
the energy of the node/edge system to its lowest possible value.

RooGraphSpring()

Default constructor for a spring

RooGraphSpring(RooGraphNode *n1, RooGraphNode *n2)

Spring standard constructor

void print()

void Set1stNode(RooGraphNode *n1)

Changes the first node the spring is connected to to the given value

void Set2ndNode(RooGraphNode *n2)

Changes the second node the spring is connected to to the given value

void Connect(RooGraphNode *n1, RooGraphNode *n2)

Causes the spring to connect the two given nodes

double GetX1()

Returns the x value for one endpoint of the node

double GetY1()

Returns the y value for one endpoint of the node

double GetX2()

Returns the x value for the other endpoint of the node

double GetY2()

Returns the y value for the other endpoint fo the node

void SwitchNodes()

Changes which node is the first and which is second

double GetInitialDistance()

Returns the length of the string

void SetGraphLength(double length)

double GetLength()

Returns the spring length used to calculate the energy in the spring

double GetSpringConstant()

Returns the spring constant for this spring

double GetSpringDEnergy(char m)

Returns the first derivative of the energy of this spring with respect to
either x or y, determined by the input parameter m

double GetSpringD2Energy(char m)

Returns the second derivative of the spring energy with respect to either
x or y, determined by the input parameter m

double GetSpringDxyEnergy()

Returns the double derivative of the spring energy with repect to both x&y

RooGraphSpring()

void read(ifstream &file)

double GetGraphLength()

Last update: Tue Jul 11 11:45:44 2006
Copyright (c) 2000-2005, Regents of the University of California *

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