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Java implementation of the openCTM Mesh compression file format

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/*
 * Copyright (C) 2012 Daniel Heinrich
 *
 * 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, see  
 * or write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301  USA.
 */
package darwin.jopenctm.data;

/**
 *
 * @author daniel
 */
public class SortableVertex implements Comparable
{

    /**
     * Vertex X coordinate (used for sorting).
     */
    public final float x;
    /**
     * Grid index. This is the index into the 3D space subdivision grid.
     */
    public final int gridIndex;
    /**
     * Original index (before sorting).
     */
    public final int originalIndex;

    public SortableVertex(float x, int gridIndex, int originalIndex)
    {
        this.x = x;
        this.gridIndex = gridIndex;
        this.originalIndex = originalIndex;
    }

    @Override
    public int compareTo(SortableVertex o)
    {
        if (gridIndex != o.gridIndex) {
            return gridIndex - o.gridIndex;
        } else if (x < o.x) {
            return -1;
        } else if (x > o.x) {
            return 1;
        } else {
            return 0;
        }
    }

    @Override
    public boolean equals(Object obj)
    {
        if(!(obj instanceof SortableVertex))
            return false;
        SortableVertex o = (SortableVertex)obj;

        return gridIndex == o.gridIndex && x == o.x;
    }

    @Override
    public int hashCode()
    {
        int hash = 7;
        hash = 31 * hash + Float.floatToIntBits(this.x);
        hash = 31 * hash + this.gridIndex;
        return hash;
    }

}