org.hortonmachine.gears.utils.CheckPoint Maven / Gradle / Ivy
/*
* This file is part of HortonMachine (http://www.hortonmachine.org)
* (C) HydroloGIS - www.hydrologis.com
*
* The HortonMachine 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 .
*/
package org.hortonmachine.gears.utils;
/**
* A point with a fast hash.
*
* @author Andrea Antonello (www.hydrologis.com)
*/
public class CheckPoint {
public final int x;
public final int y;
public CheckPoint( int col, int row ) {
this.x = col;
this.y = row;
}
public boolean equals( Object obj ) {
if (obj instanceof CheckPoint) {
CheckPoint d = (CheckPoint) obj;
return (x == d.x) && (y == d.y);
}
return false;
}
public int hashCode() {
int sum = x + y;
return sum * (sum + 1) / 2 + y;
}
}