jfig.utils
Class Xspline

java.lang.Object
  jfig.utils.Xspline

public class Xspline

extends java.lang.Object

Nested Class Summary

(package private) class	Xspline.DemoFrame
(package private) class	Xspline.RandomClosedSplineGenerator
(package private) class	Xspline.RandomOpenSplineGenerator

Field Summary

(package private) double	HIGH_PRECISION
(package private) double	LOW_PRECISION
(package private) double	MAX_SPLINE_STEP
(package private) java.awt.Point[]	points
(package private) double[]	sfactors

Constructor Summary

Xspline(java.awt.Point[] points, double[] sfactors)

Method Summary

(package private) void	addPoint(int x, int y)
void	compute_closed_spline() given our arrays of N control points and N control factors, calculate a closed X-spline.
void	compute_open_spline() given our arrays of N control points and N control factors, calculate an open X-spline.
void	drawSpline(java.awt.Graphics g)
java.awt.Point[]	getComputedPointArray()
static void	main(java.lang.String[] argv)
static void	msg(java.lang.String s)
void	setPoints(java.awt.Point[] points, double[] sfactors)
(package private) void	spline_segment_loop(int k, java.awt.Point p0, java.awt.Point p1, java.awt.Point p2, java.awt.Point p3, double s1, double s2, double precision)
double	step_computing(int k, java.awt.Point p0, java.awt.Point p1, java.awt.Point p2, java.awt.Point p3, double s1, double s2, double precision) From xfig 3.2.3 u_draw.c: This function computes the step used to draw the segment (p1, p2) (xv1, yv1) : coordinates of the vector from middle to origin (xv2, yv2) : coordinates of the vector from middle to extremity

Methods inherited from class java.lang.Object

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

Field Detail

points

java.awt.Point[] points

sfactors

double[] sfactors

LOW_PRECISION

final double LOW_PRECISION

See Also:

Constant Field Values

HIGH_PRECISION

final double HIGH_PRECISION

See Also:

Constant Field Values

MAX_SPLINE_STEP

final double MAX_SPLINE_STEP

See Also:

Constant Field Values

Constructor Detail

Xspline

public Xspline(java.awt.Point[] points,
               double[] sfactors)

Method Detail

setPoints

public void setPoints(java.awt.Point[] points,
                      double[] sfactors)

getComputedPointArray

public java.awt.Point[] getComputedPointArray()

compute_open_spline

public void compute_open_spline()

given our arrays of N control points and N control factors, calculate an open X-spline. This method seems to work since 16.04.2001.

compute_closed_spline

public void compute_closed_spline()

given our arrays of N control points and N control factors, calculate a closed X-spline. This method still has problems (always, but for unknown reasons, with the third point)

spline_segment_loop

void spline_segment_loop(int k,
                         java.awt.Point p0,
                         java.awt.Point p1,
                         java.awt.Point p2,
                         java.awt.Point p3,
                         double s1,
                         double s2,
                         double precision)

step_computing

public double step_computing(int k,
                             java.awt.Point p0,
                             java.awt.Point p1,
                             java.awt.Point p2,
                             java.awt.Point p3,
                             double s1,
                             double s2,
                             double precision)

From xfig 3.2.3 u_draw.c: This function computes the step used to draw the segment (p1, p2) (xv1, yv1) : coordinates of the vector from middle to origin (xv2, yv2) : coordinates of the vector from middle to extremity

addPoint

void addPoint(int x,
              int y)

drawSpline

public void drawSpline(java.awt.Graphics g)

msg

public static void msg(java.lang.String s)

main

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