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Question by Jeff 5 · Oct 05, 2010 at 02:20 PM · directionanglebulleteuleranglesshooter

Setting rotation angle of a bullet fired towards the mouse

Hi all,

I am creating a top down 2D shmup and have successfully instatiated a bullet prefab.

During the Start Handler the bullet converts the 2d mouse coordinates into 3d World coordinates. The difference current position (player) and mouse is normalised to create a vector that i use in the Update handler.

The trouble is the bullet plane and texture which is rectangular needs to be rotated toward the in the angle of this vector. I am using eularAngles to rotate the prefab

Ive even tried hardcoding an angle in but don't seem to be getting a result:-

transform.eulerAngles = new Vector3(0, 0, 20);

Here is the scipt:-

function Start(){

var targetScreenPos = Input.mousePosition; targetScreenPos.z = distFromCam; var mouseTargetPostion = Camera.main.ScreenToWorldPoint(targetScreenPos);

var targetDelta = mouseTargetPostion - transform.position; launchVelocity = targetDelta.normalized * bulletSpeed;

//var targetAngle = Quaternion.LookRotation(mouseTargetPostion);

transform.eulerAngles = Vector3.Angle(targetDelta, transform.right);

}

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Answer by Loius · Oct 05, 2010 at 03:05 PM

Have you tried Transform.LookAt? You may need to make the bullet a child of something if the bullet model is rotated by default such that its Z axis is not forward.

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avatar image PrimeDerektive · Jan 06, 2011 at 03:42 PM 0
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Agreed, I would probably just use LookAt() in this situation.

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