SCNNode Bounding Box

Beanz

After guys

I am currently working with the iOS ARKit, I am currently trying to implement a piece of code

func getChildBoundingBox() -> (v1: SCNVector3, v2: SCNVector3) {
let firstChild = self.childNodes[0]
return (firstChild.boundingBox.max, firstChild.boundingBox.min)
}

Using the SceneKit code, I should be able to use the

boundingBox.Min and Max

But these are hidden behind

GetBoundingBox()

Which requires refs but cannot pass itself

Should I be using Urho instead of SceneKit as according to this API page

Urho.BoundingBox/

These are exposed in the Urho Lib

ColeX

Oh , sorry for my misunderstanding.

I check the documentation with swift and Objective-C

boundingBox in Objective-C which export to c#

boundingBox in swift

Actually They two are the same function .

So the solution

bool getChildBoundingBox(ref SCNVector3 max , ref SCNVector3 min)
{
    var firstChild = this.childNodes[0];

    return firstChild.GetBoundingBox(ref max, ref min);
}

Usage

 SCNVector3 _max = new SCNVector3();
 SCNVector3 _min = new SCNVector3();

 getChildBoundingBox(ref _max, ref _min);

ColeX

This is swift function which returns tuples . You can convert it to C# in this way .

    float[] getChildBoundingBox(SCNVector3 v1 , SCNVector3 v2)
    {
        var firstChild = this.childNodes[0];
        return new float[] { firstChild.boundingBox.max, firstChild.boundingBox.min }; 
    }

then you can access the value by

   float[] array = getChildBoundingBox(v1,v2);
   float max = array[0];
   float min = array[1];

Beanz

@ColeX

Thats great but this does not exist in the xamarin library

firstChild.boundingBox.max, firstChild.boundingBox.min }

The only methods / Properties that are exposed are GetBoundingBox()

So the real question is, what am I meant to be passing as refs

And it returns a bool so not even the values I need lol

ColeX

Oh , sorry for my misunderstanding.

I check the documentation with swift and Objective-C

boundingBox in Objective-C which export to c#

boundingBox in swift

Actually They two are the same function .

So the solution

bool getChildBoundingBox(ref SCNVector3 max , ref SCNVector3 min)
{
    var firstChild = this.childNodes[0];

    return firstChild.GetBoundingBox(ref max, ref min);
}

Usage

 SCNVector3 _max = new SCNVector3();
 SCNVector3 _min = new SCNVector3();

 getChildBoundingBox(ref _max, ref _min);

Beanz

@ColeX

Cheers, that seems to of got it

Long day friday and heavy weekend did not help with my logic