Gathering Data v2

In this post, we will cover:

• a BETTER way to get an object’s bounding box

Better way to obtain bounding box

Keeping in mind that boundingBoxReal returns [[xmin, ymin, zmin], [xmax, ymax, zmax], boundingSphereRadius], we can make use of the min and max for each xyz coord.

An updated sample code would be as such.

private _bbr = boundingBoxReal _obj;
private _p1 = _bbr select 0;
private _p2 = _bbr select 1;
private _maxWidth = (abs ((_p2 select 0) - (_p1 select 0))) / 2;
private _maxLength = (abs ((_p2 select 1) - (_p1 select 1))) / 2;
private _maxHeight = (abs ((_p2 select 2) - (_p1 select 2))) / 2;

_corners = [
    _obj modelToWorld [_maxWidth, _maxLength, _maxHeight],
    _obj modelToWorld [_maxWidth, _maxLength, -_maxHeight],
    _obj modelToWorld [-_maxWidth, _maxLength, -_maxHeight],
    _obj modelToWorld [_maxWidth, -_maxLength, -_maxHeight],
    _obj modelToWorld [_maxWidth, -_maxLength, _maxHeight],
    _obj modelToWorld [-_maxWidth, _maxLength, _maxHeight],
    _obj modelToWorld [-_maxWidth, -_maxLength, _maxHeight],
    _obj modelToWorld [-_maxWidth, -_maxLength, -_maxHeight]
];

Code Explanation

First, we call boundingBoxReal, and save the xyz min and xyz max coords to _p1 and _p2 respectively.

From there, we can calculate the xyz that we need to add to the object’s coordinates in order to get the bounding box in the object’s coordinates. This is represented by the variables _maxWidth, _maxLength, and _maxHeight.

To convert from the object’s coordinates to world coordinates, we can use the function modelToWorld. This allows us to get the corners of the bounding box in world coordinates.

This was the only significant change made to the code.

Resulting Bounding Boxes