Package com.dkt.graphics.extras

Class GFormula

java.lang.Object

com.dkt.graphics.elements.GraphicE

com.dkt.graphics.elements.Graphic

com.dkt.graphics.extras.GFormula

All Implemented Interfaces:

Cloneable, Iterable<GraphicE>

public class GFormula
extends Graphic

This class represents a basic Formula.
It translates a Calculable into a Graphic.

Author:

Federico Vera <[email protected]>

Field Summary

Fields inherited from class com.dkt.graphics.elements.GraphicE

STROKE

Constructor Summary

Constructors

Constructor	Description
GFormula(Calculable formula)	Creates a new GFormula for the given Calculable object

Method Summary

Modifier and Type	Method	Description
void	calculate(double xs, double xf, double step)	Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing.
void	calculate(double xs, double xf, double step, GraphicE element)	Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing. Note: The element must be in the position (0, 0) otherwise it the graphics will be in the incorrect position.
void	calculateArea(double xs, double xf, double step)	Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing.
void	calculatePath(double xs, double xf, double step)	Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing.
void	setAreaPaint(Paint paint)	Sets the Paint used for the area below the curve

Methods inherited from class com.dkt.graphics.elements.Graphic

add, addAll, addCopyOfAll, clone, contains, draw, equals, flatten, getCount, hashCode, indexOf, isVisible, iterator, move, remove, removeAll, setVisible, traslate

Methods inherited from class com.dkt.graphics.elements.GraphicE

getPaint, getStroke, setPaint, setStroke

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

GFormula

public GFormula(Calculable formula)

Creates a new GFormula for the given Calculable object

Parameters:

formula - the Calculable object that contains the relation

Throws:

IllegalArgumentException - if formula is null

Method Details

calculate

public void calculate(double xs,
 double xf,
 double step)
               throws IntervalException

Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing.

Parameters:

xs - The starting point of the interval

xf - The end point of the interval

step - The step used to f

Throws:

IntervalException - if xs < xf or step < 0 or step > xf - xs

See Also:

• calculate(double, double, double, GraphicE)
• calculateArea(double, double, double)
• calculatePath(double, double, double)

calculate

public void calculate(double xs,
 double xf,
 double step,
 GraphicE element)
               throws IntervalException,
IllegalArgumentException

Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing.
Note: The element must be in the position (0, 0) otherwise it the graphics will be in the incorrect position. Of course this will come in handy with Graphic that have strange shapes.
Note 2: For some reason that I was unable to figure out yet, this method fails when using GRegPoly.

Parameters:

xs - The starting point of the interval

xf - The end point of the interval

step - The step used to f

element - The element that will be copied and translated in order to generate this value

Throws:

IntervalException - if xs < xf or step < 0 or step > xf - xs

IllegalArgumentException - if element is null

See Also:

• calculate(double, double, double)
• calculateArea(double, double, double)
• calculatePath(double, double, double)

calculatePath

public void calculatePath(double xs,
 double xf,
 double step)
                   throws IntervalException

Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing. The drawing will be based on lines.

Parameters:

xs - The starting point of the interval

xf - The end point of the interval

step - The step used to f

Throws:

IntervalException - if xs < xf or step < 0 or step > xf - xs

See Also:

• calculate(double, double, double)
• calculate(double, double, double, GraphicE)
• calculateArea(double, double, double)

setAreaPaint

public void setAreaPaint(Paint paint)

Sets the Paint used for the area below the curve

Parameters:

paint - The Paint that will be used to render the area

Throws:

IllegalArgumentException - if paint is null

calculateArea

public void calculateArea(double xs,
 double xf,
 double step)
                   throws IntervalException

Calculates the formula, this method must be called before the method is printed in the canvas, otherwise it will print nothing. The drawing will be based on areas.
Note: you must set the area paint first

Parameters:

xs - The starting point of the interval

xf - The end point of the interval

step - The step used to f

Throws:

IntervalException - if xs < xf or step < 0 or step > xf - xs

See Also:

• calculate(double, double, double)
• calculate(double, double, double, GraphicE)
• calculateArea(double, double, double)
• setAreaPaint(Paint)