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

protected double[]	a
protected double[]	b
protected double[]	c
protected double[]	d
protected double[]	len
protected double[]	pos1D

Constructor Summary

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

Method Summary

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.