com.graphbuilder.curve

Class CatmullRomSpline

java.lang.Object

com.graphbuilder.curve.Curve

com.graphbuilder.curve.ParametricCurve

com.graphbuilder.curve.CatmullRomSpline

public class CatmullRomSpline
extends ParametricCurve

The CatmullRomSpline is equal to the CardinalSpline with the value of alpha fixed at 0.5. The implementation for the CatmullRomSpline is about 10% faster then the CardinalSpline implementation.

See Also:

CardinalSpline

Field Summary

Fields

Modifier and Type	Field and Description
private static double[][]	pt

Fields inherited from class com.graphbuilder.curve.Curve

connect, cp, gi

Constructor Summary

Constructors

Constructor and Description
CatmullRomSpline(ControlPath cp, GroupIterator gi)

Method Summary

Modifier and Type	Method and Description
void	appendTo(MultiPath mp) The requirements for this curve are the group-iterator must be in-range and have a group size of at least 4.
protected void	eval(double[] p) The eval method evaluates a point on a curve given a parametric value "t".
int	getSampleLimit() Returns a value of 1.

Methods inherited from class com.graphbuilder.curve.Curve

getConnect, getControlPath, getGroupIterator, resetMemory, setConnect, setControlPath, setGroupIterator

Methods inherited from class java.lang.Object

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

Field Detail

pt

private static double[][] pt

Constructor Detail

CatmullRomSpline

public CatmullRomSpline(ControlPath cp,
                        GroupIterator gi)

Method Detail

eval

protected void eval(double[] p)

Description copied from class: ParametricCurve

The eval method evaluates a point on a curve given a parametric value "t". The parametric value "t" is stored in the last index location of the specified double array. This value should not be changed. The dimension of the point to evaluate is p.length - 1. The result of the evaluation is placed in index locations 0 .. p.length - 2 (inclusive). The eval method should remain protected except for those curves that do no need any preparation to be done in the appendTo method.

Specified by:

eval in class ParametricCurve

getSampleLimit

public int getSampleLimit()

Returns a value of 1.

Specified by:

getSampleLimit in class ParametricCurve

appendTo

public void appendTo(MultiPath mp)

The requirements for this curve are the group-iterator must be in-range and have a group size of at least 4. If these requirements are not met then this method returns quietly.

Specified by:

appendTo in class Curve

See Also:

MultiPath, BinaryCurveApproximationAlgorithm