package vector;

import java.util.Arrays;

public class Vector3d {

  private double[] coord;
  
  public Vector3d() {
    this(0, 0, 0);
  }
  
  public Vector3d(double x, double y, double z) {
    this.coord = new double[3];
    this.coord[0] = x;
    this.coord[1] = y;
    this.coord[2] = z;
  }
  
  public double getX() {
    return this.coord[0];
  }
  
  public double getY() {
    return this.coord[1];
  }
  
  public double getZ() {
    return this.coord[2];
  }
  
  public void setX(double x) {
    this.coord[0] = x;
  }
  
  public void setY(double y) {
    this.coord[1] = y;
  }
  
  public void setZ(double z) {
    this.coord[2] = z;
  }
  
  public Vector3d cross(Vector3d other) {
    Vector3d c = new Vector3d();
    c.setX(this.getY() * other.getZ() - this.getZ() * other.getY());
    c.setY(this.getZ() * other.getX() - this.getX() * other.getZ());
    c.setZ(this.getX() * other.getY() - this.getY() * other.getX());
    return c;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + Arrays.hashCode(coord);
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    Vector3d other = (Vector3d) obj;
    if (!Arrays.equals(coord, other.coord)) {
      return false;
    }
    return true;
  }

  @Override
  public String toString() {
    return "[ " + this.getX() + " " + this.getY() + " " + this.getZ() + " ]";
  }
  
  public static Vector3d x() {
    return new Vector3d(1, 0, 0);
  }
  
  public static Vector3d y() {
    return new Vector3d(0, 1, 0);
  }
  
  public static Vector3d z() {
    return new Vector3d(0, 0, 1);
  }
}