Raycast transform.forward always going to global (0,0,0)

Questions & Answers
1

hey

I am trying to figure out why my ray cast transform.forward is always going to global transform vector 0,0,0

well thats what the debug.drawline seems to be representing.

48613-capture123434235.jpg
48613-capture123434235.jpg1590×797 192 KB

sorry if blue line hard to see

heres my code:

Ray ray = new Ray (transform.position, transform.forward);

		RaycastHit hit;

		float distanceToPlayer;


		if (Physics.Raycast (ray.origin, ray.direction, out hit)) 
		{
			Debug.DrawLine (ray.origin, transform.forward, Color.blue);

			transform.LookAt (player.position + transform.up);

			//Debug.DrawLine (ray.origin, player.position, Color.green);
			Debug.DrawLine (ray.origin, player.position, Color.white);

			distanceToPlayer = hit.distance;

			Debug.Log (distanceToPlayer);
		}

The rest of it works well… and it seems to be the way everyone else is doing it, so can someone please explain?

Thanks :slight_smile:

2

Sure, the problem is that the code is using Debug.DrawLine instead of Debug.DrawRay to draw a ray.

Debug.DrawLine takes two points in world space. So while the start of the line is correctly at the ray origin, the end of the line is at a point somewhere 1 unit away from (0,0,0) because directions are represented as normalized vectors. Debug.DrawRay will instead use the direction as a direction instead of a point, automatically calculating the end point of the line in world space based on the starting position and the direction.

Also, a quick aside, you can pass the Ray directly to Raycast:

if (Physics.Raycast(ray, out hit))