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Class EDU.emporia.mathbeans.MathGrapher

Object
   |
   +----Component
           |
           +----Container
                   |
                   +----JComponent
                           |
                           +----JPanel
                                   |
                                   +----MathGrid
                                           |
                                           +----EDU.emporia.mathbeans.MathGrapher

public class MathGrapher

extends MathGrid

Version:

1.3

Author:

Joe Yanik

Since:

6/30/00

defaultPointColor

The default color to be used when no color is specified for a given point

discretePoints

The array of discrete points to be graphed on the MathGrapher

f

Parameter used to add a graph to the MathGrapher

g

Parameter used to add a graph to the MathGrapher

graph

The graph array will contain the graphs to be graphed

graphColor

An array of colors to be used to draw the graphs in different colors

graphCounter

The number of graphs currently being displayed

graphPoints

The graphPoints arrays will contain the points to be used to plot the graphs

maxNumberOfGraphs

The maximum number of graphs that can be displayed at one time

point

point is will reference the Point2D object used by plotPoints to be displayed.

pointColors

An array of Color objects that will determine the color to be used to display each point.

pointPlotted

pointPlotted is a boolean used to keep track of the first time that pointPlot is called.

pointRadius

The radius (in pixels) used to draw the discrete points.

tDelta

The tMin array keeps track of the current value of tMin for each curve.

tMax

The tMin array keeps track of the current value of tMin for each curve.

tMin

The tMin array keeps track of the current value of tMin for each curve.

tTraceHome

The "home point" for the trace

traceEnabled

Keeps track of whether or not the trace feature is enabled

traceGraph

This will correspond to the index of the graph to be traced at the moment

traceMultiplier

This will be incremented or decremented as the graph is traced.

xPixelWidth

The mathematical width of one pixel on the coordinate system

xTraceMath

xTraceMath is the mathematical x-coordinate of the current point displayed in the trace

yTraceMath

xTraceMath is the mathematical x-coordinate of the current point displayed in the trace

EDU.emporia.mathbeans.MathGrapher()

addGraph(Graphable)

addGraph adds a new Graph to the MathGrapher

addGraph(Graphable, Color)

Another version of addGraph that allows you to specify the color of the graph.

addPoint(Point2D.Double)

Adds a new point to be displayed using the default color.

addPoint(Point2D.Double, Color)

A version of the addPoint method that allows you to specify the color used to display the point.

addPoint(double, double)

Another version of the addPoint method that accepts the coordinates of the point as parameters

addPoint(double, double, Color)

Still another version of the addPoint method that specifies the color.

addPoints(Point2D.Double[])

Adds all the points to the graph

getF()

Gets the parameter f

getG()

Gets the value of the parameter g

getPointRadius()

Returns the radius (in pixels) that will be used to plot the discrete points.

isTraceEnabled()

Determines whether or not the trace feature is enabled

main(String[])

paintComponent(Graphics)

Paints the Grid

plotPoint(double, double)

Plots the point with indicated coordinates.

removeAllPoints()

Removes all points from the graph

removeGraph()

removeGraph will remove the most recently displayed graph

removeGraph(int)

Removes the graph at the indicated index

removeGraph(Graphable)

Removes the specified graph

removePoint(Point2D.Double)

Removes the point from the graph.

setF(Graphable)

Sets the values of the Graphable object f which would then be added to the MathGrapher

setG(Graphable)

Sets the parameter g

setPointRadius(int)

Sets the radius (in pixels) of the discrete points to be plotted on the graph.

setTraceEnabled(boolean)

Sets whether or not the trace feature is enabled

updateGraph()

updateGraph should be called whenever a new graph has been added or when one of the graphs that has already been added has changed

updateParameters()

updateParameters readjusts all the parameters of the graph.

updateTrace()

updateTrace adjusts the parameters to display the new trace point

protected java.awt.Color defaultPointColor

The default color to be used when no color is specified for a given point

protected java.util.Vector discretePoints

The array of discrete points to be graphed on the MathGrapher

protected EDU.emporia.mathtools.Graphable f

Parameter used to add a graph to the MathGrapher

protected EDU.emporia.mathtools.Graphable g

Parameter used to add a graph to the MathGrapher

protected EDU.emporia.mathtools.Graphable[] graph

The graph array will contain the graphs to be graphed

protected java.awt.Color[] graphColor

An array of colors to be used to draw the graphs in different colors

protected int graphCounter

The number of graphs currently being displayed

protected EDU.emporia.mathtools.Point2D[][] graphPoints

The graphPoints arrays will contain the points to be used to plot the graphs

protected int maxNumberOfGraphs

The maximum number of graphs that can be displayed at one time

protected EDU.emporia.mathtools.Point2D.Double point

point is will reference the Point2D object used by plotPoints to be displayed.

protected java.util.Vector pointColors

An array of Color objects that will determine the color to be used to display each point.

protected boolean pointPlotted

pointPlotted is a boolean used to keep track of the first time that pointPlot is called.

protected int pointRadius

The radius (in pixels) used to draw the discrete points. Must be at least 2.

protected double[] tDelta

The tMin array keeps track of the current value of tMin for each curve. For functions it will be xMinCurrent

protected double[] tMax

The tMin array keeps track of the current value of tMin for each curve. For functions it will be xMinCurrent

protected double[] tMin

The tMin array keeps track of the current value of tMin for each curve. For functions it will be xMinCurrent

protected double tTraceHome

The "home point" for the trace

protected boolean traceEnabled

Keeps track of whether or not the trace feature is enabled

protected int traceGraph

This will correspond to the index of the graph to be traced at the moment

protected double traceMultiplier

This will be incremented or decremented as the graph is traced.

protected double xPixelWidth

The mathematical width of one pixel on the coordinate system

protected double xTraceMath

xTraceMath is the mathematical x-coordinate of the current point displayed in the trace

protected double yTraceMath

xTraceMath is the mathematical x-coordinate of the current point displayed in the trace

public MathGrapher()

public void addGraph(Graphable h)

addGraph adds a new Graph to the MathGrapher

Parameters:

h - h is a Graphable object. It could either represent a function or a parameteric curve

public void addGraph(Graphable h,
                     Color c)

Another version of addGraph that allows you to specify the color of the graph.

Parameters:

h - The Graphable object to be graphed

c - The color that it will be graphed in.

public void addPoint(EDU.emporia.mathtools.Point2D.Double p)

Adds a new point to be displayed using the default color. Repeated invocation of addPoint will result in additional points being displayed

Parameters:

p - The point to be displayed

public void addPoint(EDU.emporia.mathtools.Point2D.Double p,
                     Color c)

A version of the addPoint method that allows you to specify the color used to display the point.

Parameters:

p - The point to be displayed

c - The color used to display it

public void addPoint(double x,
                     double y)

Another version of the addPoint method that accepts the coordinates of the point as parameters

Parameters:

x - The x-coordinate of the point

y - The y-coordinate of the point

public void addPoint(double x,
                     double y,
                     Color c)

Still another version of the addPoint method that specifies the color.

Parameters:

x - The mathematical x-coordinate of the point to be added

y - The mathematical y-coordinate of the point to be added.

c - The color used to draw the point

public void addPoints(EDU.emporia.mathtools.Point2D.Double[] pointArray)

Adds all the points to the graph

Parameters:

pointArray - The array of points to be added to the graph

public EDU.emporia.mathtools.Graphable getF()

Gets the parameter f

Returns:

The Graphable object f which is displayed on the Graph

public EDU.emporia.mathtools.Graphable getG()

Gets the value of the parameter g

Returns:

The graphable object g

public int getPointRadius()

Returns the radius (in pixels) that will be used to plot the discrete points.

public boolean isTraceEnabled()

Determines whether or not the trace feature is enabled

Returns:

True if enabled, false otherwise

public static void main(String[] argv)

public void paintComponent(Graphics a)

Paints the Grid

Overrides:

paintComponent in class MathGrid

public void plotPoint(double x,
                      double y)

Plots the point with indicated coordinates. Repeated calls of plotPoint will only result in the latest point being plotted.

Parameters:

x - The x-coordinate of the point to be plotted

y - The y-coordinate of the point to be plotted

public void removeAllPoints()

Removes all points from the graph

public void removeGraph()

removeGraph will remove the most recently displayed graph

public void removeGraph(int index)

Removes the graph at the indicated index

Parameters:

index - The index of the graph to be removed

public void removeGraph(Graphable h)

Removes the specified graph

Parameters:

h - The Graphable object to be removed

public void removePoint(EDU.emporia.mathtools.Point2D.Double p)

Removes the point from the graph. It will remove the last occurrence of a point whose coordinates equal the coordinates of the point that is passed

Parameters:

p - The point to be removed from the graph

public void setF(Graphable f)

Sets the values of the Graphable object f which would then be added to the MathGrapher

Parameters:

f - The Graphable object representing the curve to be graphed

public void setG(Graphable g)

Sets the parameter g

Parameters:

g - The Graphable object g

public void setPointRadius(int radius)

Sets the radius (in pixels) of the discrete points to be plotted on the graph. Since 2 is the smallest radius that can be displayed any value less than 2 will result in a radius of 2

Parameters:

radius - The radius (in pixels) of the discrete points to be plotted

public void setTraceEnabled(boolean traceEnabled)

Sets whether or not the trace feature is enabled

Parameters:

traceEnabled - When true trace will be enabled

public void updateGraph()

updateGraph should be called whenever a new graph has been added or when one of the graphs that has already been added has changed

protected void updateParameters()

updateParameters readjusts all the parameters of the graph. It will be called whenever the xRange or yRange have changed

Overrides:

updateParameters in class MathGrid

protected void updateTrace()

updateTrace adjusts the parameters to display the new trace point

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