Question Checking the visibility of the object to the camera.

I shoot a beam into the camera and check if there are any interruptions

Code (CSharp):

1. Vector3 direction = controller.transform.position - MainCamera.transform.position;
2.     Debug.DrawRay(controller.transform.position, direction, Color.red); // direction bottom
3.     if(Physics.Raycast(controller.transform.position, direction, out hit)){
4.         Debug.Log(hit.collider); // hit to terrain
5.         }

but the beam visually goes down and not towards the camera, tell me what's wrong?

 

This is a vector FROM the Camera TO the controller.
You want the opposite:

MainCamera.transform.position - controller.transform.position

 

exactly, meh.
instead of prompt as it is better to check all object instead of a point?
I think to launch 4 rays from extreme points (bottom left / right, top left / right), then maybe there is a more reliable way?

 

Does your object have a renderer?
Unity - Scripting API: MonoBehaviour.OnBecameVisible() (unity3d.com)

Edit: Nvm, that doesn't take occlusion into account.

Launching rays from Bounds would probably be your best bet.

 

I need to know the distance too...
I just thought I could use spherecast, but they write there that there are a lot of problems and inaccuracies with it
so I will let 4 rays ...