Selecting a sprite in the scene as soon as it hits the sprite

How can I make it so that the bounding box created by the mouse selection selects a sprite as soon as it hits the non-transparent part of the sprite in the editor?

Natively in Unity, a sprite is only selected once the sprite is completely englobed in the selection bounding box. Which I find very uncomfortable to use.

 

I don't think it's really possible to change Unity's default behaviour. The scene view code seems to call HandleUtility.PickRectObjects, so you can't really change it.

-sam

 

Ok, too bad!

 

Should be fairly easy. You can hook into the scene view events with a delegate:

Code (CSharp):

1.  SceneView.onSceneGUIDelegate += YourMethodHere;

Then within your ustom method you Raycast the mouse:

Code (CSharp):

1.  Ray ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);

Then see what it hit with a Physics.RayCast. If it hit a sprite then set the Selection.ActiveGameObject to the gameobject that your raycast hit

 

Cool, this implies that I have Colliders on all my sprites right?

 

For using the raycast and physics yup it would indeed. You could also do something more manual for ones without colliders.

E.G you could find all sprites in your scene (GameObject.Find) and loop through them to see if they would intersect your ray

 

How can I get the box selection of the mouse? Because clicking on a sprite already works as intended, however the issue is the "drag" selection. If I knew how to get that info, I could do a BoxCast easily to get the sprites like you suggested.

 

That I don't know since there isn't really anything exposed to the Selection class:

https://docs.unity3d.com/ScriptReference/Selection.html

But with what i posted above you can try and make one manually, you can determine where the first mouse down was and compare it to the current mouse position (then use it for your box cast)

 

That's why I mentioned HandleUtility.PickRectObjects. That's what the default box selection code uses, which you can't override.

-sam