protected void buildArrow() {
// Start with cylinders:
final Cylinder base = new Cylinder("base", 4, 16, _width * .75, _length);
rotator.fromEulerAngles(0, 0, 90 * MathUtils.DEG_TO_RAD);
base.getMeshData().rotatePoints(rotator);
base.getMeshData().rotateNormals(rotator);
attachChild(base);
base.updateModelBound();
final Pyramid tip = new Pyramid("tip", 2 * _width, _length / 2f);
tip.getMeshData().translatePoints(0, _length * .75, 0);
attachChild(tip);
tip.updateModelBound();
}
