Question How to attach a camera to a ghost/prefab when using Unity NetCode?

I'm working on a first person game and want the camera's perspective to be based on the player entity's location. Adding a camera component doesn't seem to work, I'm guessing because it's not a DOTS component? What's the best way to go about this?

 

I have the same doubt, and I want to create a raycast from the camera position.

 

Did you have a look at teh DOTS Sample (https://unity.com/fr/releases/2019-3/dots-sample) ?

I think that the Hybrid Renderer (V2 ?) supports the camera.

The idea I think is to let your camera as a game object and copy the position of the player entity (or a child to position the camera where your want) every frame in a monobehavior update (with entity manager and on the main thread).

 

This is the code I currently use in a multiplayer game. It's very simple, but works, and is probably a good starting point for fancier stuff. It simply takes the player's translation and updates the Camera.main's position. (Note: It's a top-down game, which is why I only update x and z). If your game is not multiplayer, remove all client/command target component stuff.

Spoiler: Update camera's position from the player entity.

Code (CSharp):

1. [UpdateInWorld(UpdateInWorld.TargetWorld.Client)]
2. public class HybridMainCameraFollowPlayerSystem : SystemBase
3. {
4.     protected override void OnUpdate()
5.     {
6.         // Camera position default.
7.         var position = Camera.main.transform.position;
8.  
9.         // Get the player entity.
10.         var commandTargetComponentEntity = GetSingletonEntity<CommandTargetComponent>();
11.         var commandTargetComponent       = GetComponent<CommandTargetComponent>(commandTargetComponentEntity);
12.  
13.         Entities.
14.             WithAll<PlayerComponent>().
15.             ForEach(
16.                     (Entity entity, in Translation translation) =>
17.                     {
18.                         // Only update when the player is the one that is controlled by the client's player.
19.                         if (entity == commandTargetComponent.targetEntity)
20.                         {
21.                             position.x = translation.Value.x;
22.                             // Leave y be.
23.                             position.z = translation.Value.z;
24.                         }
25.                     }
26.                    ).
27.             Run();
28.  
29.         Camera.main.transform.position = position;
30.     }
31. }