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Rotate object in direction of movement
Hi all, I know similar questions have been asked but I am still struggling. I have an NPC that randomly moves in the X and Z direction, and I want it to turn to the direction it is moving so as so be more realistic, but when I tried coding it, it just randomly rotates forever.
public class Walking : MonoBehaviour {
private float latestDirectionChangeTime;
private readonly float directionChangeTime = 3f;
private float characterVelocity = 2f; //Random.Range(.5f, 3f);
private Vector3 movementDirection;
private Vector3 movementPerSecond;
public GameObject alien;
void Start(){
latestDirectionChangeTime = 0f;
calcuateNewMovementVector();
}
void calcuateNewMovementVector(){
//create a random direction vector with the magnitude of 1, later multiply it with the velocity of the enemy
movementDirection = new Vector3(Random.Range(-1.0f, 1.0f), 0,Random.Range(-1.0f, 1.0f)).normalized;
movementPerSecond = movementDirection * characterVelocity;
}
void Update(){
//if the changeTime was reached, calculate a new movement vector
if (Time.time - latestDirectionChangeTime > directionChangeTime){
latestDirectionChangeTime = Time.time;
calcuateNewMovementVector();
}
//move enemy:
transform.position = new Vector3(transform.position.x + (movementPerSecond.x * Time.deltaTime), 22.45f,
transform.position.z + (movementPerSecond.z * Time.deltaTime));
//wait a set amount of timeeeeeee
//if his movement is to the west, then he turns 90 in the y axis
if (transform.position.x > 0)
{
alien.transform.Rotate(0,90,0);
}
}
}
thank you in advance!
Answer by Namey5 · Feb 21, 2020 at 10:14 AM
You've already calculated and stored the movement direction, so all you need to do is transform that into a quaternion and assign it in your Update function and you're done;
alien.transform.rotation = Quaternion.LookRotation (movementDirection);
If you want the transition to be smoother, you can interpolate the rotation as well;
alien.transform.rotation = Quaternion.Slerp (alien.transform.rotation, Quaternion.LookRotation (movementDirection), Time.deltaTime * 40f);
both seem to do the same jerky direction change, but it is enough for me!
You can change the interpolation amount to make it smoother, he has it set to 40 but you can play with different values, like 5 for instance. The lower the interpolation amount the slower and smoother the rotation will be
If the player keeps spinning while trying to move sides and glitching while trying to move back.Try transfor$$anonymous$$g only player model not whole player itself like I did
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