edu.mssm.crover.domain2d
Class NBezierPath

java.lang.Object
  |
  +--edu.mssm.crover.domain2d.NBezierPath

All Implemented Interfaces:

java.lang.Cloneable

public class NBezierPath

extends java.lang.Object

implements java.lang.Cloneable

Path along a Bezier curve of n control points. NBezierPath iterate along a path made of a BezierCurve of N control points and return the caller the successive positions at which a glyph can be positionned along the path given a certain inter-glyph distance.

Constructor Summary

NBezierPath(java.awt.geom.Point2D[] controls)

Method Summary

void	atStart() Sets the engine on the starting line.
double	B(int i, int n, double t) Returns the Bernstein polynomial value.
boolean	endReached() Returns true when the end of the path has been reached.
static void	main(java.lang.String[] args)
java.awt.geom.Point2D	nextPoint() Returns the next point of the path.
int	optimalNumberOfGlyphs(int num_pos) Computes an optimal number of glyphs.
int	optimalNumberOfGlyphs(int num_pos, java.awt.geom.Point2D[] positions) Computes an optimal number of glyphs.
void	separationDistance(double distance) Sets the separation distance between two points returned by the engine.
protected void	setNumberOfGlyphs(int num_pos)

Methods inherited from class java.lang.Object

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

Constructor Detail

NBezierPath

public NBezierPath(java.awt.geom.Point2D[] controls)
            throws java.lang.IllegalArgumentException

Method Detail

atStart

public void atStart()

Sets the engine on the starting line.

separationDistance

public void separationDistance(double distance)

Sets the separation distance between two points returned by the engine.

setNumberOfGlyphs

protected void setNumberOfGlyphs(int num_pos)

optimalNumberOfGlyphs

public int optimalNumberOfGlyphs(int num_pos)

Computes an optimal number of glyphs. This optimal number is defined as the number of glyphs that can hold on this curve, separated by separationDistance. The number of position given in argument is used as a hint for the approximation of equal distance. It is important to provide a non null number.

optimalNumberOfGlyphs

public int optimalNumberOfGlyphs(int num_pos,
                                 java.awt.geom.Point2D[] positions)

Computes an optimal number of glyphs. Same as optimalNumberOfGlyphs() but stores the positions of the glyphs in positions if that array is not null.

nextPoint

public java.awt.geom.Point2D nextPoint()

Returns the next point of the path.

B

public final double B(int i,
                      int n,
                      double t)

Returns the Bernstein polynomial value.

endReached

public boolean endReached()

Returns true when the end of the path has been reached.

main

public static void main(java.lang.String[] args)