I'm trying to detect where approximately an enemy in my game has been hit. I have added a box collider with a height of 1.8 metres to the enemy.

When the player then shoots, I use a RaycastHit to check if the enemy has been hit. This works fine.

My code is this:

GameObject nHit = _LaserScript.hit.collider.gameObject;

if (nHit != null)
    Vector3 nHP = _LaserScript.hit.point; //"hit" is a RaycastHit
    Debug.Log("hit at x: " + nHP.x.ToString() + ", y: " + nHP.y.ToString() + ", z: " + nHP.z.ToString() + "\n");

I can relatively easy determine if the enemy has been hit at the head by checking

if (nHP.y > 1.5f)
    //headshot detected

However, I'm not sure if these coords have to be converted to "local" coordinates.

I tried to determine if I shot the enemy at the left side of his body or on the right side.

To my surprise, the "x" coord of the raycast was always around 1.2, and I have no idea why. I was expecting the x value of the hit to be somewhat between 0 and 0.5f as the collider is not wider than 0.5f.

Basically, I would like a hit at the left "border" of the enemy to have an x value between 0 and 0.1f.

Do I have to convert these hit coordinates (of which the docs say they're world coords) to "local" coords?


Yes, as you found in the docs, raycast hits (as with most physics-related points) are specified in world space coordinates — ie. the coordinate system of your whole scene.

If you want to convert them to the local coordinate space of a particular transform, you'll want to run them through:

Vector3 localHit = transform.InverseTransformPoint(hit.point);

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.