/** 3D Voxel index
 * @author: Phil Gage
 */
class VoxelIndex {

//probably should have used xyz fields instead of array...
//seems to work better in Java, since no array typdef
//   public int x, y, z;
    public int xyz[] = new int[3];

    VoxelIndex () {
    }

    VoxelIndex (VoxelIndex v) {
        this.xyz[0] = v.xyz[0];
        this.xyz[1] = v.xyz[1];
        this.xyz[2] = v.xyz[2];
    }

    VoxelIndex (int x, int y, int z) {
        this.xyz[0] = x;
        this.xyz[1] = y;
        this.xyz[2] = z;
    }

    /** Copy v to this */
    public void set (VoxelIndex v) {
        this.xyz[0] = v.xyz[0];
        this.xyz[1] = v.xyz[1];
        this.xyz[2] = v.xyz[2];
    }

    /** Copy xyz to this */
    public void set (int x, int y, int z) {
        this.xyz[0] = x;
        this.xyz[1] = y;
        this.xyz[2] = z;
    }

    /** Compare */
    public boolean equals (VoxelIndex v) {
        return this.xyz[0] == v.xyz[0] &&
               this.xyz[1] == v.xyz[1] &&
               this.xyz[2] == v.xyz[2];
    }

    public String toString () {
        return "VoxelIndex x=" + xyz[0] + " y=" + xyz[1] + " z=" + xyz[2];
    }

}