Java Geometry Algorithm setPathAnchor(Shape s, Point2D pt)

Description

set Path Anchor

License

Mozilla Public License

Declaration

static GeneralPath setPathAnchor(Shape s, Point2D pt) 

Method Source Code

//package com.java2s;
/*/*from www  . ja v a 2 s . c o  m*/
 * Copyright © 2009-2011 Rebecca G. Bettencourt / Kreative Software
 * <p>
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * <a href="http://www.mozilla.org/MPL/">http://www.mozilla.org/MPL/</a>
 * <p>
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 * <p>
 * Alternatively, the contents of this file may be used under the terms
 * of the GNU Lesser General Public License (the "LGPL License"), in which
 * case the provisions of LGPL License are applicable instead of those
 * above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL License and not to allow others to use
 * your version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the LGPL License. If you do not delete
 * the provisions above, a recipient may use your version of this file
 * under either the MPL or the LGPL License.
 * @since PowerPaint 1.0
 * @author Rebecca G. Bettencourt, Kreative Software
 */

import java.awt.Shape;
import java.awt.geom.GeneralPath;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;

public class Main {
    static GeneralPath setPathAnchor(Shape s, Point2D pt) {
        Point2D a = getPathAnchor(s);
        float dx = (float) (pt.getX() - a.getX());
        float dy = (float) (pt.getY() - a.getY());
        GeneralPath gp = new GeneralPath();
        float[] coords = new float[6];
        for (PathIterator p = s.getPathIterator(null); !p.isDone(); p.next()) {
            switch (p.currentSegment(coords)) {
            case PathIterator.SEG_MOVETO:
                gp.moveTo(coords[0] + dx, coords[1] + dy);
                break;
            case PathIterator.SEG_LINETO:
                gp.lineTo(coords[0] + dx, coords[1] + dy);
                break;
            case PathIterator.SEG_QUADTO:
                gp.quadTo(coords[0] + dx, coords[1] + dy, coords[2] + dx, coords[3] + dy);
                break;
            case PathIterator.SEG_CUBICTO:
                gp.curveTo(coords[0] + dx, coords[1] + dy, coords[2] + dx, coords[3] + dy, coords[4] + dx,
                        coords[5] + dy);
                break;
            case PathIterator.SEG_CLOSE:
                gp.closePath();
                break;
            }
        }
        return gp;
    }

    static Point2D getPathAnchor(Shape s) {
        double[] coords = new double[6];
        for (PathIterator p = s.getPathIterator(null); !p.isDone(); p.next()) {
            if (p.currentSegment(coords) != PathIterator.SEG_CLOSE) {
                return new Point2D.Double(coords[0], coords[1]);
            }
        }
        return new Point2D.Double(0, 0);
    }
}

Related

1. projectPoint(float x, float y, Line2D ray, float distance)
2. projectPointOntoLine(Point2D pt, Line2D ln)
3. quantisePoint(Point2D.Double dpos, Point gpos)
4. relTo(final Point2D from, final Point2D to, final Point2D rel)
5. resample(Vector points, int n, Vector newPoints)
6. setPathControlPoint(Shape s, int i, Point2D pt)
7. setRevisePoint(Point2D.Double revisePoint, Point2D.Double startPoint)
8. slopeOfLineBetween(Point2D.Double p1, Point2D.Double p2)
9. smallestBoundingBox( java.awt.Point.Double[] points)