EventSystem: how do you use IDropHandler.OnDrop with 3D objects?

I am dragging 3D objects by implenting I*DragHandler EventSystem in a Drag.cs script (OnBeginDrag,OnDrag, OnEndDrag). It works well and gets nicely occluded by UI buttons.
Note that the 3D objects have colliders in them.

I would like to implement drop.
I attach a Drop script on the target and implementing IDropHandler.OnDrop(PointerEventDataeventData) in this script.
When I Debug.Log(eventData) I get nothing when I drop the dragged object.

I figure that maybe the object colliders are occluding the event system raycasting and prevent the raycast from reaching the dropped object so I implemented

Code (CSharp):

1. canvas = gameObject.AddComponent<CanvasGroup>();
2. canvas.blocksRaycasts = false;

inside OnBeginDrag of the dragged object but it's still not recognizing the OnDrop.

What is the secret sauce?

 

There is a fully implemented drag and drop example in the UI sample provided by UT on the asset store, you can check it out here:
https://www.assetstore.unity3d.com/en/#!/content/25468

 

Read my post, I'm talking about drag and drop with 3D objects with colliders, not UI.

 

Hi, add a physics ray caster to your camera

 

There is already a Physics Raycaster attached to my camera.
All the 3D objects already respond to drag and clicks.

 

ahh, i see, just disable the collider on the object that is being dragged, then re-enable it after drag ends.

also just to clarify, you are implementing OnDrop to the target object, not the dragged object?

 

That's right, ondrop on the target, like with a UI.
That's what I thought I need to disable colliders by hand. I logged a bug on that.

 

@laurentlavigne, were you ever able to get this working with a 3d object?

 

@laurentlavigne or @CapnCromulent were you guys able to get this working ?

 

It did work, just had to toggle off the object's collider.