Raycasting from child weird behaviour

Questions & Answers
1

Sorry if this has appeared before but I couldn’t find anything. I want to raycast from a child object towards the direction it’s facing. It’s rotation is changed by it’s parent object accordingly but I think something is wrong. Here is the code:

RaycastHit hit2;
		if (tip != null) {
			if (Physics.Raycast (tip.position,tip.TransformDirection(1, 0, 0) , out hit2)) {
				Debug.DrawLine(tip.position, hit2.point);
			}
		}

And here is the part with the rotation change:

mouseOnY = Camera.main.ScreenToWorldPoint (Input.mousePosition).y - transform.position.y;
		foreach (Transform t in upperBody) {
			t.localRotation = Quaternion.Euler (new Vector3 (t.rotation.x, t.rotation.y, mouseOnY));
		}

I uploaded a video because the problem cannot be seen in an image.

link text

2

Sorry for wasting your time. It seem I have been rotating the parent and child at the same type so the rotations where going funky.

3

Use this code for rotation:

		Vector3 mousePositionScreen = Input.mousePosition;
		mousePositionScreen.z = Mathf.Abs( Camera.main.transform.position.z );//<without setting Z (default is 0f) this Camera.main.ScreenToWorldPoint() will give the same result as Camera.main.transform.position, srsly
		Vector3 mousePositionWorld = Camera.main.ScreenToWorldPoint( mousePositionScreen );
		float axisRotaionTowardMouse = Quaternion.LookRotation( mousePositionWorld-upperBody.position ).eulerAngles.x;
		upperBody.rotation = Quaternion.Euler( new Vector3( 0f , 0f , -axisRotaionTowardMouse ) );

To achieve better accuracy (meaning spear being more accurate in targeting mouse position) you can add similar rotation procedure to your spear Transform too:

spearTransform.rotation = Quaternion.Euler( new Vector3( 0f , 0f , -Quaternion.LookRotation( mousePositionWorld-spearTransform.position ).eulerAngles.x ) );