@Test public void testLookAt() { final Vector3 direction = new Vector3(-1, 0, 0); final Quaternion quat = new Quaternion().lookAt(direction, Vector3.UNIT_Y); assertTrue(Math.abs(direction.distance(quat.apply(Vector3.UNIT_Z, null))) <= Quaternion.ALLOWED_DEVIANCE); direction.set(1, 1, 1).normalizeLocal(); quat.lookAt(direction, Vector3.UNIT_Y); assertTrue(Math.abs(direction.distance(quat.apply(Vector3.UNIT_Z, null))) <= Quaternion.ALLOWED_DEVIANCE); direction.set(-1, 2, -1).normalizeLocal(); quat.lookAt(direction, Vector3.UNIT_Y); assertTrue(Math.abs(direction.distance(quat.apply(Vector3.UNIT_Z, null))) <= Quaternion.ALLOWED_DEVIANCE); }
direction.set(point).subtractLocal(lastPoint); rotation.lookAt(direction, up);
direction.set(point).subtractLocal(lastPoint); rotation.lookAt(direction, up);