Get resulting bounds from intersection

Unity Engine
1

Hi everyone,
lets say i have two boxcollider intersecting each other (including any possible rotation) - how could i retrieve the center of the intersecting area?

Thank you so much! :slight_smile:

3179527--242420--upload_2017-8-10_23-42-39.png

2

I am not sure if it will work, but I think if you have the contact points

and caculate the centroid of these points you will get the center

1 Like
3

You may try Physics.ComputePenetration. Given two intersecting colliders this function computes the minimal translation required to separate them apart. The result is a distance and a direction vector. Maybe the half-way the distance is an useful point in your case.

1 Like
4

Both answers are good, unfortunately i cannot use contacts because im not using the OnCollision events, but otherwise that would be useful. I think ComputePenetration is what i need :slight_smile:

5

I would suggest to use raw math to solve, especially for box colliders

6

If it will be actual for someone

Bounds bounds1 = new Bounds(new Vector3(0, 0, 0), new Vector3(2, 2, 2));
Bounds bounds2 = new Bounds(new Vector3(1, 1, 1), new Vector3(3, 3, 3));

Bounds intersectionBounds = new Bounds();
if (bounds1.Intersects(bounds2))
{
    intersectionBounds.SetMinMax(
        Vector3.Max(bounds1.min, bounds2.min),
        Vector3.Min(bounds1.max, bounds2.max)
    );
}

Debug.Log("New Bounding Box Size: " + intersectionBounds.size);
2 Likes
7

It is, thank you very much, exactly what I was looking for after chat GPT wrote some shitty code :slight_smile: