How to get the dimensions of the box around a GLTF/GLB model ?

[agGitHub]

Hi,

I load 3D GLTF/GLB models with a CompletableFuture like here.

I would like to get the size of the box around the GLTF/GLB model.

How can I do that ?

Thanks.

[grassydragon]

Hi!
You can access bounding box if you save a reference to RendereableInstance when setting Renderable. For example:

// Create a model node and fit it inside a unit cube
val modelNode = Node()
modelNode.parent = transformableNode

val instance = modelNode.setRenderable(state.model)
val boundingBox = instance.filamentAsset?.boundingBox

if (boundingBox != null) {
    val maxHalfExtent = boundingBox.halfExtent.maxOrNull()!!
    val scale = 0.5f / maxHalfExtent
    modelNode.localScale = Vector3(scale, scale, scale)
}

[Yeafun]

// set scale TransformableNode model = new TransformableNode(arFragment.getTransformationSystem()); float scale = 0.1f; model.setLocalScale(new Vector3(scale, scale, scale)); if i use the TransformableNode, setLocalScale() method doesn't work.

[grassydragon]

That is right since the TransformableNode scale is controlled by the user. See how I'm using the modelNode as a child of the TransformableNode.