code: public Vector3d absolute(Vector3d dest) {
          dest.x = Math.abs(this.x);
          dest.y = Math.abs(this.y);
          dest.z = Math.abs(this.z);
          return dest;
      }
docs: /*
  (non-Javadoc)
  @see org.joml.Vector3dc#absolute(org.joml.Vector3d)