Point2D.java

/* Copyright (C) 2014,2015  Maximilian Diedrich
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>
 */

package de.hu_berlin.informatik.spws2014.ImagePositionLocator;

import java.io.Serializable;

/**
 * Representing a pixel position relative to an image origin.
 */
public class Point2D implements Serializable {
	private static final long serialVersionUID = 1L;
	
	public int x;
	public int y;
	
	public Point2D (int x, int y) {
		this.x = x;
		this.y = y;
	}
	
	public Point2D(double x, double y) {
		this.x = (int) x;
		this.y = (int) y;
	}
	
	public Point2D(FPoint2D a) {
		this.x = (int) a.x;
		this.y = (int) a.y;
	}
	
	public Point2D getOrthogonal(Point2D origin) { 
		// Turn opposite to GPS as y axis goes down, not up
		double xnew = origin.x + (y - origin.y);
		double ynew = origin.y - (x - origin.x);
		return new Point2D(xnew, ynew);
	}
	
	public double getDistance(Point2D a) {
		double tmp = Math.sqrt(Math.pow(a.x - this.x, 2) + Math.pow(a.y - this.y, 2));
		if (tmp != 0) return tmp;
		else return Double.MIN_NORMAL;
	}
	
	public double getDistance(FPoint2D inp) {
		return this.getDistance(new Point2D(inp));
	}
	
	public boolean smallerThan(Point2D inp) {
		return (inp.x > this.x) || (inp.y > this.y);
	}
	
	public String toString() {
		return "P2D<" + x + "," + y + ">";
	}
    
	@Override
	public boolean equals(Object o) {
		if (o == null) {
			return false;
		}
		else if (o.getClass() == Point2D.class) {
			return this.equals((Point2D) o);
		}
		else {
			return false;
		}
	}
	
	public boolean equals(Point2D p) {
		if (p == null)
			return false;
		else
			return this.x == p.x && this.y == p.y;
	}
	
	@Override
	public int hashCode() {
		return ((y & 65536) << 16) | (x & 65536);
	}
}