I went through the following article

https://developer.vuforia.com/library/articles/Solution/Unity-Drag-an-AR-object-on-screen-with-finger

for user touch handling in unity extension project

2 questions,

1. Is any code snippet available to pan, zoom, rotate along 3d objects central axis vis user gestures swipe and pinch?

2. The article says that the object should have a mesh collider, wanted to understand what is it and how can we add that.

Thanks!