Set position standing on ground (calculating y for bottom border/ lowest point myself not rigidbody)

Unity Engine
1

Hello,

I have some gameobjects in my Scene, I want all of them on a certain height.
The lowest bottom must have this height. For a 3D visual in a 2D Scene, so no rigidbody…

I try to calculate the bottom:

    public static float CalculateBottom(GameObject go, float y)
    {
        Bounds _bounds = new Bounds(Vector3.zero, Vector3.zero);
        foreach (MeshFilter filter in go.GetComponentsInChildren<MeshFilter>())
        {
            if (filter.mesh != null)
            _bounds.Encapsulate(filter.mesh.bounds);
        }
        foreach (Renderer renderer in go.GetComponentsInChildren<Renderer>())
        {
            _bounds.Encapsulate(renderer.bounds);
        }
        Debug.Log("The local bounds of this model is " + _bounds);

        Vector3 extents = _bounds.extents;
        Vector3 center = _bounds.center;
        //Vector3 top = new Vector3(center.x, center.y + extents.y, center.z);
        //Vector3 left = new Vector3(center.x - extents.x, center.y, center.z);
        //Vector3 right = new Vector3(center.x + extents.x, center.y, center.z);
        Vector3 bottom = new Vector3(center.x, center.y - extents.y, center.z);
        //return bottom.y;
        //return -Mathf.Max(y, extents.y*2);
        // return -extents.y*2;
        //return y-extents.y;
        return y-(center.y - extents.y);
    }

I try to calculate it and set the result to Y (in some Update Routine).
All meshes etc are in childs of the gameobject.
Update Routine sets the Position:

                PlayerHeadY = Globals.CalculateBottom(PlayerHead, PlayerHead.transform.position.y);
                TalkerHeadY = Globals.CalculateBottom(TalkerHead, TalkerHead.transform.position.y);               

                PlayerHead.transform.position = new Vector3(-0.3f, PlayerHeadY, 0.5f);
                TalkerHead.transform.position = new Vector3(0.3f, TalkerHeadY, 0.5f);

I cannot get both have their bottom on the same height. What am I doing wrong?

Thanks a lot!

2

returning this makes the top border of thwo objects always have the same height:
return - extents.y*2;

But I still do not get the exact height for the bottom border, how do I get it?

Thanks :slight_smile: