How to specifically scale model using pinch gesture in either lengthwise of bredthwise?

i have a model. i want to just scale in up or down lengthwise rather than in every axes. How can i tweak into scaleController and pinch gesture to do this??

Solution

you can make use of the - public class TransformableNode Node that can be selected, translated, rotated, and scaled using gestures from TransformationSystem. Pl. refer to the google developer link which explains how to use these API's https://developers.google.com/ar/reference/java/sceneform/reference/com/google/ar/sceneform/ux/TransformableNode