Arcore-unity-sdk: How to select an already placed 3D object through Raycasting?

[AdilRabbani]

I want to select an object through Raycasting in ARCore Unity in HelloAR example (The one where we put Andy GameObject on horizontal planes). Once I have placed the object in the real world, I want to select it so I can manipulate it using code. I've tried the traditional Unity method, but it doesn't work. Then I tried using TrackableHit with Frame.Raycast, but the resultant hit doesn't really tell if it has collided with a GameObject; it only tells you about the position of the hit....Any workaround for this? Or something I'm missing? I'm stuck...

[pablisho]

Hi, if you want the "traditional Unity method" (I guess it's Phisycs.Raycast) I believe you'll have to add a collider to the GameObject.
Frame.Raycast will only return hits for the flag you pass to it which can be a Plane or Feature point. It's not intended to use it with user created game objects, only with ARCore internal objects (which currently are detected planes and feature points).

[ReiiYuki]

I think Raycasting from ARCore (Frame.Raycast) is not that same thing as Raycast of UnityEngine. I think Raycast of ARcore might not work with Andy. Maybe you can try Physics.Raycast.

[pablisho]

Given the thumbs up, I'm closing this issue because I think it's resolved. Please reopen if you still have the issue.

[flankechen]

another thing easily getting wrong is, use the arcore camera to construct the ray instead of camera.main.