# Physics.Raycast won't use right method
**URL:** https://discussions.unity.com/t/physics-raycast-wont-use-right-method/115227
**Category:** Questions & Answers
**Created:** [August 29, 2014, 2:55am UTC](https://discussions.unity.com/t/physics-raycast-wont-use-right-method/115227 "2014-08-29T02:55:06Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@TheIncognito](https://discussions.unity.com/u/TheIncognito)
#### Post date: [August 29, 2014, 2:55am UTC](https://discussions.unity.com/t/physics-raycast-wont-use-right-method/115227/1 "2014-08-29T02:55:06Z")
if (Input.GetButton (“Fire1”)) {
if(Physics.Raycast(ray, transform.forward, hit, 300)) {
```
}
}
```
When I have named all these variables (ray and hit), it tells me that I’m using Physics.raycast wrong.
ERROR MESSAGE: Assets/Custom Assets/Scripts/ShootGun.cs(19,36): error CS1502: The best overloaded method match for `UnityEngine.Physics.Raycast(UnityEngine.Ray, out UnityEngine.RaycastHit, float, int)’ has some invalid arguments
---
### Author:  [@kacyesp](https://discussions.unity.com/u/kacyesp)
#### Post date: [August 29, 2014, 3:04am UTC](https://discussions.unity.com/t/physics-raycast-wont-use-right-method/115227/2 "2014-08-29T03:04:51Z")
I think you may have just messed up the types.
I would double check what types you declared “ray” and “hit” as and make sure you match one of the function overloads specified in the docs: [Unity - Scripting API: Physics.Raycast](http://docs.unity3d.com/ScriptReference/Physics.Raycast.html)
---
### Author:  [@AyAMrau](https://discussions.unity.com/u/AyAMrau)
#### Post date: [August 29, 2014, 3:08am UTC](https://discussions.unity.com/t/physics-raycast-wont-use-right-method/115227/3 "2014-08-29T03:08:48Z")
You need to put the out keyword before the RaycastHit parameter:
Physics.Raycast(ray, transform.forward, out hit, 300)
You also may be mixing the version that takes origin and direction as vectors with one that just takes a ray. They’re multiple versions so check the documentation
---
### Author:  [@TheIncognito](https://discussions.unity.com/u/TheIncognito)
#### Post date: [August 29, 2014, 11:00am UTC](https://discussions.unity.com/t/physics-raycast-wont-use-right-method/115227/4 "2014-08-29T11:00:42Z")
Found it:
Turns out that Camera.main.ScreenPointToRay(Screen.width / 2, Screen.height / 2, 0) makes transform.forward create panic in unity 😕