org.jgraph.util
Class Bezier
java.lang.Object
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+--org.jgraph.util.Bezier
- public class Bezier
- extends Object
Interpolates given points by a bezier curve. The first
and the last two points are interpolated by a quadratic
bezier curve; the other points by a cubic bezier curve.
Let p a list of given points and b the calculated bezier points,
then one get the whole curve by:
sharedPath.moveTo(p[0])
sharedPath.quadTo(b[0].x, b[0].getY(), p[1].x, p[1].getY());
for(int i = 2; i < p.length - 1; i++ ) {
Point b0 = b[2*i-3];
Point b1 = b[2*i-2];
sharedPath.curveTo(b0.x, b0.getY(), b1.x, b1.getY(), p[i].x, p[i].getY());
}
sharedPath.quadTo(b[b.length-1].x, b[b.length-1].getY(), p[n - 1].x, p[n - 1].getY());
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Constructor Summary |
Bezier(Point2D[] points)
Creates a new Bezier curve. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Bezier
public Bezier(Point2D[] points)
- Creates a new Bezier curve.
- Parameters:
points -
getPoints
public Point2D[] getPoints()
- Returns the calculated bezier points.
- Returns:
- the calculated bezier points
getPointCount
public int getPointCount()
- Returns the number of bezier points.
- Returns:
- number of bezier points
getPoint
public Point2D getPoint(int i)
- Returns the bezier points at position i.
- Parameters:
i - - Returns:
- the bezier point at position i
Copyright (C) 2001-2004 Gaudenz Alder. All rights reserved.