Raycast 101 help

Unity Engine
1

I need a raycast that points straight down at all times. I thought that using Vector3.down as my direction would do this. But this is not the result I’m getting. It seems to be drawing a ray of finite length to a specific place. What am I doing wrong?:

    void Update () {
        RaycastHit hitInfo;
        if (Physics.Raycast(transform.position, Vector3.down, out hitInfo))
        {
            if (hitInfo.normal.y < 0.5)
            {
                canTransition = false;
            }
            else canTransition = true;
        } 
        Debug.DrawLine (transform.position, Vector3.down, Color.cyan);
        }

2

Debug.DrawLine is not the same as Debug.DrawRay

Currently you are drawing a line between your transform position an the coordinate of Vector3.down aka Vector3(0, -1, 0).

3

Thanks, fffMalzbier. So what should I be using instead of Vector3.down to fix the non-visible raycast? It still seems to be not facing straight down.

Edit: so maybe it seems that my non-visible raycast is actually working correctly. Still unclear about whether or not I should be using Vector3.down.

4

Debug.DrawLine (transform.[position - Vector3.down](Unity - Scripting API:), transform.position, Color.cyan);
he was saying you are going to a SPECIFIC place

as you said Vector3.Down is JUST 0,-1,0 which is where the line was drawing to…

transform.position - Vector3.Down is a meaningful, changing value over time, as you expected.

Ta.