Utils.java Source code

Introduction

Here is the source code for Utils.java

Source

import java.awt.Polygon;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

/*
 * $Id: ShapeUtils.java,v 1.4 2008/10/14 22:31:46 rah003 Exp $
 *
 * Copyright 2006 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
public class Utils {

    public static Shape generatePolygon(int sides, int outsideRadius, boolean normalize) {
        return generatePolygon(sides, outsideRadius, 0, normalize);
    }

    public static Shape generatePolygon(int sides, int outsideRadius, int insideRadius, boolean normalize) {
        Shape shape = generatePolygon(sides, outsideRadius, insideRadius);
        if (normalize) {
            Rectangle2D bounds = shape.getBounds2D();
            GeneralPath path = new GeneralPath(shape);
            shape = path
                    .createTransformedShape(AffineTransform.getTranslateInstance(-bounds.getX(), -bounds.getY()));
        }
        return shape;
    }

    public static Shape generatePolygon(int sides, int outsideRadius, int insideRadius) {

        if (sides < 3) {
            return new Ellipse2D.Float(0, 0, 10, 10);
        }

        AffineTransform trans = new AffineTransform();
        Polygon poly = new Polygon();
        for (int i = 0; i < sides; i++) {
            trans.rotate(Math.PI * 2 / (float) sides / 2);
            Point2D out = trans.transform(new Point2D.Float(0, outsideRadius), null);
            poly.addPoint((int) out.getX(), (int) out.getY());
            trans.rotate(Math.PI * 2 / (float) sides / 2);
            if (insideRadius > 0) {
                Point2D in = trans.transform(new Point2D.Float(0, insideRadius), null);
                poly.addPoint((int) in.getX(), (int) in.getY());
            }
        }

        return poly;
    }
}