Limited pinch zoom in/out.

[ShankarKakumani]

I would like to zoom out till the model is very small. or like to increase size.

Or is there a way to set the size for models manually?

[ThomasGorisse]

Please send your questions in the Discussions/Q&A section and mark it as answered when it's the case

[RGregat]

One way is to scale the Node where the model is attached to, manually

Vector3 newScale = new Vector3(scaling, scaling, scaling);

if (node != null) {
    node.setLocalScale(newScale);
}

You can use this for example to implement a distance dependent scaling of your model. Simple calculate the distance between your camera and the AnchorNode where the Node is attached to.

To change the scaling with a gesture you have to wrap your Node with a TransformableNode

node = new Node();
node.setRenderable(renderable);

transformableNode = new TransformableNode(arFragment.getTransformationSystem());
transformableNode.setParent(anchorNode);

node.setParent(transformableNode);

I think that should work.