com.mxgraph.util

Class mxSpline1D

java.lang.Object

com.mxgraph.util.mxSpline1D

public class mxSpline1D
extends Object

One dimension of a spline curve

Field Summary

Fields

Modifier and Type	Field and Description
protected double[]	a
protected double[]	b
protected double[]	c
protected double[]	d
protected double[]	len
protected double[]	pos1D

Constructor Summary

Constructors

Constructor and Description
mxSpline1D(double[] controlPointProportions, double[] positions1D) Creates a new Spline.

Method Summary

Methods

Modifier and Type	Method and Description
double	getDx(double x) Returns the first derivation at x.
double	getFastValue(double x) Returns an interpolated value.
double	getValue(double x) Returns an interpolated value.
void	setValues(double[] controlPointProportions, double[] positions1D) Set values for this Spline.
void	solve(double[][] A, double[] b) Solves Ax=b and stores the solution in b.

Methods inherited from class java.lang.Object

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

Field Detail

len

protected double[] len

pos1D

protected double[] pos1D

a

protected double[] a

b

protected double[] b

c

protected double[] c

d

protected double[] d

Constructor Detail

mxSpline1D

public mxSpline1D(double[] controlPointProportions,
          double[] positions1D)

Creates a new Spline.

Parameters:

controlPointProportions - the proportion along the curve, from 0->1 that each control point lies on

positions1D - the co-ordinate position in the current dimension that each control point lies on

Method Detail

setValues

public void setValues(double[] controlPointProportions,
             double[] positions1D)

Set values for this Spline.

Parameters:

controlPointProportions - the proportion along the curve, from 0->1 that each control point lies on

positions1D - the co-ordinate position in the current dimension that each control point lies on

getValue

public double getValue(double x)

Returns an interpolated value.

Parameters:

x -

Returns:

the interpolated value

getFastValue

public double getFastValue(double x)

Returns an interpolated value. To be used when a long sequence of values are required in order, but ensure checkValues() is called beforehand to ensure the boundary checks from getValue() are made

Parameters:

x -

Returns:

the interpolated value

getDx

public double getDx(double x)

Returns the first derivation at x.

Parameters:

x -

Returns:

the first derivation at x

solve

public void solve(double[][] A,
         double[] b)

Solves Ax=b and stores the solution in b.