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