How detect player is which side of box?

I have a 3d box like this picture.
An a player in 3d.
Now how can I detect which side of box my player is? 1 or 2.

I've tested calculating angles between box's transform.right and player.transform.forward but it doesn't work nice. What should I do ?

 

i cannot see ant picture, can you upload again?

 

You could have two new box colliders for each side. Then you could create function OnTriggerEnter on your player script.

 

yes, you can create 2 empty gameObject and add colliders.
Then use trigger function to detect tag / name.

 

yes, here u are

Thanks a lot, It's a way but I want to use one collider.

 

How about Vector maths?
dif = Player pos.y - ground pos.y
if(dif > 0), = 2
else if (dif < 0) = 1
else return null

 

Code (CSharp):

1. void OnTriggerEnter(Collider trigger){
2.     if(trigger.gameobject.tag == "upper"){
3.         //Do somthing if upper
4.     }
5.  
6.     if(trigger.gameobject.tag == "lower"){
7.         //Do somthing if lower
8.  
9.     }
10. }

Make sure you tick the "Is Trigger" in the box collider's inspector.

EDIT: My bad, just seen the only one collider message

 

What you're really asking is to test which side of a plane (your box wall) a point (game object position) is on. A plane is defined by a normal (the direction it's pointing) and a location. To check which side of it a point is one, you take the direction from the origin of the plane to the point. If the angle between the direction and your plane's normal is greater than 90 degrees, is on the backside of the plane.



Taking the origin of your plane to be the center of your box...

Code (csharp):

1. Vector3 direction = playerPosition - planeOrigin;
2. if (Vector3.Angle(direction, planeNormal) > 90)
3. {
4. // do something
5. }

This is a good way of testing this since it works in all directions and all dimensions.

 

Thank you all, solved.

Great idea, it works nice....

 

Hey!
I would love to do what you wrote, but i can't understand plane normal. Can you help me what does it mean and how it's works?

 

He explains it with the image? There are some helper methods etc you can use too. Create a plane

Code (CSharp):

1. var plane = new Plane(normal, point);
2. var onPositiveSide =  plane.GetSide(viewerPosition);

edit: You need to understand these basics to create a 3D spaced game