Worldpoint-Screenpoint. bamboozled

Hey guys,

I am pretty new to GameDev with only a few months of experimetning but I have used raycast and linecast before from the camera/FPS but I am damned if I can get it to work from a stationary character on the screen.

Whenever I cast a ray it does not go anywhere near the mouse point (which i want it to).
so to sum up.

I want to through a linecast out from the players position to the input of the mouse left button. It sounds so easy when I type it but it has had me all over the place for 3 days. Please someone put me out of my misery with a bit of advice. \panic stricken sob.

Code (CSharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class TongueRender : MonoBehaviour
6. {
7.     public Transform MouseDestination;
8.     LineRenderer line;
9.     Vector3 mousePos ;
10.     void Start ()
11.     {
12.         line = gameObject.GetComponent<LineRenderer>();
13.         line.enabled = false;
14.         mousePos = Input.mousePosition;
15.     }
16.     void Update ()
17.     {
18.         if(Input.GetButtonDown("Fire1"))
19.         {
20.             StopCoroutine("FireLaser");
21.             StartCoroutine("FireLaser");
22.         }
23.     }
24.     IEnumerator FireLaser()
25.     {
26.         line.enabled = true;
27.        
28.         while(Input.GetButton("Fire1"))
29.         {
30.             Ray ray = new Ray(transform.position, Camera.main.ScreenToWorldPoint (mousePos) );
31.             RaycastHit hit;
32.             //Instantiate (MouseDestination,Camera.main.ScreenToWorldPoint (mousePos),Quaternion.identity);
33.             line.SetPosition(0, ray.origin);
34.            
35.             if(Physics.Raycast(ray, out hit, 100))
36.             {
37.                 line.SetPosition(1, hit.point);
38.                 if(hit.rigidbody)
39.                 {
40.                     hit.rigidbody.AddForceAtPosition(transform.forward
41.                                                      * 10, hit.point);
42.                 }
43.             }
44.             else
45.                 line.SetPosition(1, ray.GetPoint(100));
46.            
47.             yield return null;
48.         }
49.        
50.         line.enabled = false;
51.     }
52.  
53.     void OnTriggerEnter(Collider GameObject)
54.     {
55.         if (GameObject.tag =="Enemy")
56.         {
57.             Debug.Log ("enemy hit");
58.         }
59.     }

 

You only set mousePos once in start

It is not a reference to the mouse position, it is just a value which stays whatever it is when it is set.
Keep updating it

Also, consider using camera.screenPointToRay

 

Thanks for that - I have been trying to get camera.screenPointToRay working but there is no camera on my player - the ray just goes from the centre of my screen instead of the player position.

Big thumbs up- Thankyou, screenPointToRay is now working. No idea why this wasn't working three days ago when I did it initially but you did the trick