simulations.experiments.electrostatics
Class TwoChargesExperiment

java.lang.Object
  simulations.experiments.BaseExperiment
      simulations.experiments.electrostatics.TwoChargesExperiment

public class TwoChargesExperiment

extends BaseExperiment

Electro-quasi-statics exeriment with one moving charge and one stationary charge.

Version:

1.0

Author:

Michael Danziger

Nested Class Summary

private class

TwoChargesExperiment.Motion The equation of motion governing the evolution of the system

Field Summary

private MovingPointCharge	charge The first charge, which moves
private PointCharge	charge1 The second charge, which does not move
private EMCollection	collection The sum of these two charges
private TwoChargesExperiment.Motion	equations The equation of motion for the system (just Coulomb repulsion)
private RungeKuttaIntegration	integrator The integrator used to evolve the system
private double	q The charge of the first charge, which moves
private double	q1 The charge of the second charge
private double	t The time t
private double	v The speed of charge one along the z axis
private double	z The position of charge one along the z axis
private double	z1 The position of the second charge along the z axis

Fields inherited from class simulations.experiments.BaseExperiment

eps, FieldMotionType, FieldType, FluidFlowSpeed, Fnorm, Fpower, numberSmallSteps

Constructor Summary

TwoChargesExperiment(double q, double m, double z0, double v0, double q1, double z1)
Constructs the two charges with their initial positions

Method Summary

void	ConstructEMSource() Construct the EMColletion object which is the sum of the two charges
void	Evolve(double dt) Evolves the experiment by a time step "dt" using an RK4 integrator by taking numberSmallSteps between t and t + dt, for accuracy.
void	Evolve(double dt, double maxStep) Evolves the experiment a time step dt
BaseObject	getEMSource() Returns the BaseObject that is the collection of the two point charges
double	getFlowSpeed(Vec3 r, Vec RegionFlow) Method to find the flow speed in a given region when we are determining that speed according to region.
double	getHue(double TargetHue, Vec3 r, Vec RegionColor) Method to find the hue in a given region when we are coloring according to region (Color Mode 4).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

q

private double q

The charge of the first charge, which moves

z

private double z

The position of charge one along the z axis

v

private double v

The speed of charge one along the z axis

q1

private double q1

The charge of the second charge

z1

private double z1

The position of the second charge along the z axis

t

private double t

The time t

charge

private MovingPointCharge charge

The first charge, which moves

charge1

private PointCharge charge1

The second charge, which does not move

collection

private EMCollection collection

The sum of these two charges

equations

private TwoChargesExperiment.Motion equations

The equation of motion for the system (just Coulomb repulsion)

integrator

private RungeKuttaIntegration integrator

The integrator used to evolve the system

Constructor Detail

TwoChargesExperiment

public TwoChargesExperiment(double q,
                            double m,
                            double z0,
                            double v0,
                            double q1,
                            double z1)

Constructs the two charges with their initial positions

Parameters:

q - the charge of the first charge

m - the mass of the first charge

z0 - the position of the first charge along the z axis

v0 - the speed of the first charge along the z axis

q1 - the charge of the second stationary charge

z1 - the position of the second charge

Method Detail

ConstructEMSource

public void ConstructEMSource()

Construct the EMColletion object which is the sum of the two charges

Specified by:

ConstructEMSource in class BaseExperiment

getEMSource

public BaseObject getEMSource()

Returns the BaseObject that is the collection of the two point charges

Specified by:

getEMSource in class BaseExperiment

Evolve

public void Evolve(double dt,
                   double maxStep)

Evolves the experiment a time step dt

Evolve

public void Evolve(double dt)

Evolves the experiment by a time step "dt" using an RK4 integrator by taking numberSmallSteps between t and t + dt, for accuracy.

Specified by:

Evolve in class BaseExperiment

getHue

public double getHue(double TargetHue,
                     Vec3 r,
                     Vec RegionColor)

Method to find the hue in a given region when we are coloring according to region (Color Mode 4).

Specified by:

getHue in class BaseExperiment

Parameters:

TargetHue - This is the target hue from the renderer.

r - This is the vector postion of the point in the image.

RegionColor - This is the varous hues for the regions.

Returns:

The hue for the part of the image map at r.

getFlowSpeed

public double getFlowSpeed(Vec3 r,
                           Vec RegionFlow)

Method to find the flow speed in a given region when we are determining that speed according to region. This method is used when we have set experiment.FieldMotionType to one of either Constants.FIELD_MOTION_VREFIELD or Constants.FIELD_MOTION_VRBFIELD.

Specified by:

getFlowSpeed in class BaseExperiment

Parameters:

r - This is the vector postion of the point in the image.

RegionFlow - This is the flow speeds for the regions.

Returns:

The flow speed for the part of the image map at r.