Need raycasting help, ray goes above mouse position.

So what I'm trying to do is use a 2d raycast to detect what my mouse clicks on with 2d raycast. But when I would click the hit.collider.gameobject would return the object if I click on it. The problem is that it also hits it if you click next to it but not directly on it. Not good. I changed the collider size to smaller than the object and it started to work but still not fully working. I tried debugging with debug.drawray()... Turns out the ray is casting out maybe a meter above my click?

Code (CSharp):

1. if (Input.GetMouseButtonDown(0)) {
2.            
3.             Vector3 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
4.             mousePos.z = 100f;
5.             RaycastHit2D hit = Physics2D.Raycast(this.transform.position, mousePos);
6.             print (hit.collider.gameObject.name);
7.  
8.             Debug.DrawRay (this.transform.position, mousePos, Color.cyan, 10.0f);
9.    if (hit.collider != null) {
10.         //Code
11.    }
12.  
13. }

My mousepos.z is set to 100 so that the debug ray goes far enough.

 

I think, you are taking the position of gameobject (this.transform.position) with the script as origin point for raycast. Try with mousePos (and the change mousePos.z to 100 can be wrong too, or you will do raycasting from the back).

try something like this: RaycastHit2D hit = Physics2D.Raycast(mousePos, Vector3.forward, 100f);

 

Thank you so much, it is working perfectly. My original thinking when I was writing the code was you take the camera position and raycast towards the mouse position.