Question by hollym16 · Feb 13, 2015 at 10:47 AM · rotation raycast character mouse scriptingbasics

Turn in the direction of movement

I've got the following script on my character, he moves using the keyboard but he looks at the mouses position:

 using UnityEngine;
 
 public class PlayerMovement : MonoBehaviour
 {
     public float speed = 6f;
     Vector3 movement;
     Animator anim;
     Rigidbody playerRigidbody;
     int floorMask;
     float camRayLength = 100f;
 
     void Awake (){
         floorMask = LayerMask.GetMask ("Floor");
         anim = GetComponent <Animator>();
         playerRigidbody = GetComponent <Rigidbody>();
     }
     void FixedUpdate(){
         float h = Input.GetAxisRaw("Horizontal");
         float v = Input.GetAxisRaw("Vertical");
         Move (h, v);
         Turning ();
         Animating (h, v);
     }
     void Move (float h, float v){
         movement.Set (h, 0f, v);
         movement = movement.normalized * speed * Time.deltaTime;
         playerRigidbody.MovePosition (transform.position + movement);
     }
     void Turning (){
         Ray camRay = Camera.main.ScreenPointToRay (Input.mousePosition);
         RaycastHit floorHit;
         if(Physics.Raycast (camRay, out floorHit, camRayLength, floorMask)){
             Vector3 playerToMouse = floorHit.point - transform.position;
             playerToMouse.y = 0f;
             Quaternion newRotation = Quaternion.LookRotation(playerToMouse);
             playerRigidbody.MoveRotation(newRotation);
         }
     }
     void Animating (float h, float v){
         bool walking = h!=0f || v!=0f;
         anim.SetBool ("IsWalking", walking);
 }
 }

How can I change the script so he looks in the direction he's walking in instead of the mouse position?

Add comment · Show 4

nirharpaz · Feb 13, 2015 at 11:57 AM 0

the line that gives it to look at mouse position is

  Ray camRay = Camera.main.ScreenPointToRay (Input.mousePosition);

why don't you try to replace it with

Vector3.forward?

http://docs.unity3d.com/ScriptReference/Quaternion.LookRotation.html

hollym16 · Feb 13, 2015 at 12:29 PM 0

Thanks for the help, I've got it working, sort of, now. Here's the script:

void Update (){

             Vector3 playerToTurn = playerRigidbody.position + transform.position;

             Quaternion rotation = Quaternion.LookRotation(playerToTurn);

             transform.rotation = rotation;

         }

The player now rotates towards the direction its moving, but too slowly. I think it's rotating round the initial start point of the character. Any ideas on how to fix this? Thanks

nirharpaz · Feb 13, 2015 at 02:21 PM 0

i'de do it with Slerp

 float  damping;

 aimSpeed = dampening * Time.deltaTime
       
 transform.rotation = Quaternion.Lerp (transform.rotation, Quaternion.LookRotation (target.position - transform.position), aimSpeed);

Lerp and Slerp are functions to move from 1 value to another value over time.

here are 2 links you should check out http://answers.unity3d.com/questions/417464/quaternionslerp-with-quaternionlookrotation-causes.html

http://answers.unity3d.com/questions/335697/lookrotation-between-2-points.html

hope it helps

nirharpaz · Feb 13, 2015 at 02:25 PM 0

Ow and an unrelated tip to optimize the code. when you write something like trasform.position - 30 times a second, the system picks the whole gameObject with all its components to pick from it the component transform.position and that's really expensive.

best for you is to make a