/*
* org.openmicroscopy.shoola.util.math.geom2D.EllipseAreaAdapter
*
*------------------------------------------------------------------------------
* Copyright (C) 2006 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.util.math.geom2D;
//Java imports
import java.awt.Rectangle;
import java.awt.geom.Ellipse2D;
import java.util.ArrayList;
//Third-party libraries
//Application-internal dependencies
/**
* This following class is the <code>body</code> of the
* {@link EllipseArea handle}.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author <br>Andrea Falconi
* <a href="mailto:a.falconi@dundee.ac.uk">
* a.falconi@dundee.ac.uk</a>
* @version 2.2
* <small>
* (<b>Internal version:</b> $Revision$ $Date$)
* </small>
* @since OME2.2
*/
class EllipseAreaAdapter
extends Ellipse2D.Float
implements PlaneArea
{
/** Space used to determine if a point is on the boundaries. */
private static double epsilon = 1.0;
/**
* Creates a new instance.
*
* @param x The x-coordinate of the top-left corner.
* @param y The y-coordinate of the top-left corner.
* @param width The width of the ellipse.
* @param height The height of the ellipse.
*/
EllipseAreaAdapter(float x, float y, float width, float height)
{
super(x, y, width, height);
}
/**
* Implemented as specified in the {@link PlaneArea} I/F.
* @see PlaneArea#scale(double)
*/
public void scale(double factor)
{
Rectangle r = getBounds();
setFrame((int) (r.x*factor), (int) (r.y*factor),
(int) (r.width*factor), (int) (r.height*factor));
}
/**
* Implemented as specified by the {@link PlaneArea} I/F.
* @see PlaneArea#getPoints()
*/
public PlanePoint[] getPoints()
{
Rectangle r = getBounds();
ArrayList vector = new ArrayList(r.height*r.width);
int xEnd = r.x+r.width, yEnd = r.y+r.height;
int x, y;
for (y = r.y; y < yEnd; ++y)
for (x = r.x; x < xEnd; ++x)
if (contains(x, y)) vector.add(new PlanePoint(x, y));
return (PlanePoint[]) vector.toArray(new PlanePoint[vector.size()]);
}
/**
* Implemented as specified by the {@link PlaneArea} I/F.
* @see PlaneArea#setBounds(int, int, int, int)
*/
public void setBounds(int x, int y, int width, int height)
{
setFrame(x, y, width, height);
}
/**
* Implemented as specified in the {@link PlaneArea} I/F.
* The equation of an ellipse is of the form
* <p>
* ((x-x0)/a)^2+((y-y0)/b)^2 = 1
* </p>
* where a = getWidth()/2, b = getHeight()/2, x0 = getX()+a, y0 = getY()+b.
* @see PlaneArea#onBoundaries(double, double)
*/
public boolean onBoundaries(double x, double y)
{
double wEps = getWidth()+2*epsilon, hEps = getHeight()+2*epsilon;
if (wEps <= 0.0 || hEps <= 0) return false;
double normx = (x-getX())/wEps-getWidth()/(2*wEps);
double normy = (y-getY())/hEps-getHeight()/(2*hEps);
return ((normx * normx + normy * normy <= 0.25) && !contains(x, y));
}
/**
* Implemented as specified in the
* {@link org.openmicroscopy.shoola.util.mem.Copiable Copiable} I/F.
* @see org.openmicroscopy.shoola.util.mem.Copiable#copy()
*/
public Object copy() { return super.clone(); }
}