How to use

lengthSquared

method

in

com.ardor3d.math.Vector4

/**
 * @return the magnitude or distance between the origin (0, 0, 0, 0) and the point described by this vector (x, y,
 *         z, w). Effectively the square root of the value returned by {@link #lengthSquared()}.
 */
@Override
public double length() {
  return MathUtils.sqrt(lengthSquared());
}

/**
 * @return the magnitude or distance between the origin (0, 0, 0, 0) and the point described by this vector (x, y,
 *         z, w). Effectively the square root of the value returned by {@link #lengthSquared()}.
 */
@Override
public double length() {
  return MathUtils.sqrt(lengthSquared());
}

/**
 * Converts this vector into a unit vector by dividing it internally by its length. If the length is 0, (ie, if the
 * vector is 0, 0, 0, 0) then no action is taken.
 * 
 * @return this vector for chaining
 */
public Vector4 normalizeLocal() {
  final double lengthSq = lengthSquared();
  if (Math.abs(lengthSq) > MathUtils.EPSILON) {
    return multiplyLocal(MathUtils.inverseSqrt(lengthSq));
  }
  return this;
}

/**
 * Converts this vector into a unit vector by dividing it internally by its length. If the length is 0, (ie, if the
 * vector is 0, 0, 0, 0) then no action is taken.
 * 
 * @return this vector for chaining
 */
public Vector4 normalizeLocal() {
  final double lengthSq = lengthSquared();
  if (Math.abs(lengthSq) > MathUtils.EPSILON) {
    return multiplyLocal(MathUtils.inverseSqrt(lengthSq));
  }
  return this;
}

/**
 * Creates a new unit length vector from this one by dividing by length. If the length is 0, (ie, if the vector is
 * 0, 0, 0, 0) then a new vector (0, 0, 0, 0) is returned.
 * 
 * @param store
 *            the vector to store the result in for return. If null, a new vector object is created and returned.
 * @return a new unit vector (or 0, 0, 0, 0 if this unit is 0 length)
 */
@Override
public Vector4 normalize(final Vector4 store) {
  final double lengthSq = lengthSquared();
  if (Math.abs(lengthSq) > MathUtils.EPSILON) {
    return multiply(MathUtils.inverseSqrt(lengthSq), store);
  }
  return store != null ? store.set(Vector4.ZERO) : new Vector4(Vector4.ZERO);
}

/**
 * Creates a new unit length vector from this one by dividing by length. If the length is 0, (ie, if the vector is
 * 0, 0, 0, 0) then a new vector (0, 0, 0, 0) is returned.
 * 
 * @param store
 *            the vector to store the result in for return. If null, a new vector object is created and returned.
 * @return a new unit vector (or 0, 0, 0, 0 if this unit is 0 length)
 */
@Override
public Vector4 normalize(final Vector4 store) {
  final double lengthSq = lengthSquared();
  if (Math.abs(lengthSq) > MathUtils.EPSILON) {
    return multiply(MathUtils.inverseSqrt(lengthSq), store);
  }
  return store != null ? store.set(Vector4.ZERO) : new Vector4(Vector4.ZERO);
}