jscicalc.graph.PointList Class Reference

This represents a list of Point objects in a View. More...

List of all members.

Public Member Functions
	PointList ()
	Constructor.
void	addToPath (java.awt.geom.Path2D.Double path, java.util.concurrent.atomic.AtomicBoolean restart)
	Add points to a Path.
Static Public Member Functions
static void	main (String[] args)
	Test code.
Private Member Functions
double	gradient (final int j, final double[] derivative2)
	Used exclusively by addToPath().
double[][]	controlPoints (java.util.concurrent.atomic.AtomicBoolean restart)
	Used internally to get the control points for a set of cubic splines.
Static Private Member Functions
static void	LU_decompose (double[][] A, java.util.concurrent.atomic.AtomicBoolean restart)
	In place LU decomposition of a matrix A.
static double[]	LU_solve (final double[][] LU, final double[] b, java.util.concurrent.atomic.AtomicBoolean restart)
	Solve for LUx = b.
Private Attributes
final double	eps = 1e-10
	A number close to zero.
Static Private Attributes
static final long	serialVersionUID = 1L
Classes
class	MyView

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Detailed Description

This represents a list of Point objects in a View.

Author:

J. D. Lamb

Version:

Revision

1.2

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Constructor & Destructor Documentation

jscicalc.graph.PointList.PointList

(

)

Constructor.

Does nothing.

Referenced by jscicalc.graph.PointList.main().

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Member Function Documentation

void jscicalc.graph.PointList.addToPath	(	java.awt.geom.Path2D.Double	path,
		java.util.concurrent.atomic.AtomicBoolean	restart
	)

Add points to a Path.

Actually constructs a Bézier cubic spline.

Parameters:

	restart	If this is true, return immediately
	path	The path to add some points to

References jscicalc.graph.PointList.controlPoints().

Referenced by jscicalc.graph.PointList.main(), and jscicalc.graph.Locus.run().

double jscicalc.graph.PointList.gradient	(	final int	j,
		final double[]	derivative2
	)			[private]

Used exclusively by addToPath().

Parameters:

	j	The point at which to evaluate the gradient
	derivative2	An array of second derivatives

Returns:

A gradient

double [][] jscicalc.graph.PointList.controlPoints

(

java.util.concurrent.atomic.AtomicBoolean

restart

)

[private]

Used internally to get the control points for a set of cubic splines.

These are in the order x0+, x1-, x1+, x2-, ..., xn- and there are 2n - 1 of them where n is the number of points we have. The first index tells us if we are dealing with the x coordinate (0) or the y (1).

Parameters:

restart

If this is true, return immediately

Returns:

A set of control points

References jscicalc.graph.PointList.LU_decompose(), and jscicalc.graph.PointList.LU_solve().

Referenced by jscicalc.graph.PointList.addToPath().

static void jscicalc.graph.PointList.LU_decompose	(	double	A[][],
		java.util.concurrent.atomic.AtomicBoolean	restart
	)			[static, private]

In place LU decomposition of a matrix A.

This should only be used internally. It is not suitable for general LU decomposition.

Parameters:

	restart	If this is true, return immediately
	A	A square (not checked) matrix

Referenced by jscicalc.graph.PointList.controlPoints().

static double [] jscicalc.graph.PointList.LU_solve	(	final double	LU[][],
		final double[]	b,
		java.util.concurrent.atomic.AtomicBoolean	restart
	)			[static, private]

Solve for LUx = b.

Checks nothing. Only use internally.

Parameters:

	LU	An LU-decomposed matrix
	b	The vector of doubles
	restart	If this is true, return immediately

Returns:

A solution vector

Referenced by jscicalc.graph.PointList.controlPoints().

static void jscicalc.graph.PointList.main

(

String[]

args

)

[static]

Test code.

Parameters:

args

A dummy argument

References jscicalc.graph.PointList.addToPath(), and jscicalc.graph.PointList.PointList().

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Member Data Documentation

final double jscicalc.graph.PointList.eps = 1e-10 [private]

A number close to zero.

final long jscicalc.graph.PointList.serialVersionUID = 1L [static, private]

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

• PointList.java