[Solved] Deleted post, no way to retrieve content to post in right category

[Groupustule]

Hi admin,

I posted a question ~2h ago and my post got deleted.
Could you please indicate me where to find the original message so I can copy-paste it (it took me forever to write this) and repost in the right category.

Also, why not at the very least tell me to move it in the right category (there is no category dedicated to ECS I could find by the way), rather than just delete it without saying a word…

[angrypenguin]

If it’s ECS you want to ask about it’d be the “Data Oriented Technology Stack” section, as that’s what ECS is a part of. It’s listed under “Betas / Experimental Features” on the forum front page.

Having a thread deleted is pretty unusual. Normally they’re locked or moved or just left alone. If you’re 100% sure it posted successfully I’d ask someone like @UnityMaru about it.

[Groupustule]

Thanks for providing me with the correct category angrypenguin.

Yes, I am 100% my post got deleted, I only received an Alert about it.

I will contact UnityMaru (via the conversation tab I suppose!?).

[angrypenguin]

Now that I’ve @ tagged them they should get an alert about this thread.

[Ryiah]

You’re in luck. Google cached it before it was deleted. Code will need to be reformatted though.

cache: - Google Search https://forum.unity.com/threads/ecs-hair-pulling-error-in-what-should-be-very-simple-scripts-error-dc0023.939317/ &hl=en&gl=us&strip=1&vwsrc=0

Hi all,

I am new to Unity and I code as a hobby, so please be very descriptive about any help you provide: I am by no means a professional programmer.

I have been trying for weeks now to put together the first few bricks of a video game I am making on my own.
Since I am new to Unity I thought I would get straight into good habits by coding using Hybrid or Pure ECS (Hybrid seems to be a lot more flexible and accessible). After going through a significant amount of Unity documentation (this stuff can be seriously hard to read and not user-friendly at all, it really is a shame), forums and youtube tutorials and tried things out in Unity, I came to the realization that ECS is constantly changing and that a good 90% of the help material put online is either deprecated or on the way to be deprecated. Even more frustration came when I even found some incoherences in the official Unity ECS documentations regarding the number of components taken by Entities.ForEach (6? 8? who knows…). I don’t blame Unity, this is just factual and mostly: frustrating, especially as a new user

Ok, long story short, my (very simple) Hybrid ECS code does not work and I have tried so many things now that I just want to bash my head against the wall… help would be very much appreciated! All details are below:

The error I get:
error DC0023: Entities.ForEach uses managed IComponentData PlayerPosition&. This is only supported when using .WithoutBurst() and .Run().

My loaded packages (the key ones only):

• Entities
• Hybrid Renderer
• Jobs
• Burst

My Scene content:

• Main Camera (GameObject)
• Directional Light (GameObject)
• Plane/Ground (GameObject converted into an Entity at runtime using the built-in script set on Convert&Destroy)
• Cube/Player (GameObject converted into an Entity at runtime using the built-in script set on Convert&Destroy)

The following ECS Components have been added to the Cube (Hybrid ECS so these are MonoBehaviour, I will also try in Pure ECS tonight):
Code (CSharp):

• using UnityEngine;
• • namespace HybridECS.Components
• {
• public class MovementSpeed : MonoBehaviour
• {
• public float value;
• }
• }

Code (CSharp):

• using UnityEngine;
• • namespace HybridECS.Components
• {
• public class PlayerInput : MonoBehaviour
• {
• public float horizontal;
• }
• }

And here are my ECS Systems (using SystemBase, since the other ways are to be deprecated soon):
Code (CSharp):

• using UnityEngine;
• using Unity.Entities;
• using Unity.Mathematics; // to use math
• using Unity.Transforms; // to use Translation (= Transform in ECS???)
• • namespace HybridECS.Systems
• {
• public class PlayerMovementSystem : SystemBase // ComponentSystem is being deprecated
• {
• protected override void OnUpdate()
• {
• // Local variables used in Entities.ForEach should be defined beforehand
• float dT = Time.DeltaTime;
• • // filters the entities based on theirs associated components, which will be included in/affected by this ECS System
• // can take up to 8 types of components
• // add the “ref” keyword to read&write the component; add the “in” keyword to read-only the component
• Entities
• .ForEach(
• (ref Translation translation, in HybridECS.Components.PlayerInput playerInput, in HybridECS.Components.MovementSpeed movementSpeed) =>
• {
• // write the system behaviour here, example of movement script:
• var position = translation.Value;
• Debug.Log("The cube position is: " + position);
• translation.Value.x += movementSpeed.value * playerInput.horizontal * dT;
• translation.Value = position;
• }
• )
• .Run();
• }
• }
• }

Code (CSharp):

• using UnityEngine;
• using Unity.Entities;
• • namespace HybridECS.Systems
• {
• public class PlayerInputSytem : SystemBase // ComponentSystem is being deprecated
• {
• protected override void OnUpdate()
• {
• // filters the entities based on theirs associated components, which will be included in/affected by this ECS System
• Entities
• .ForEach(
• (ref HybridECS.Components.PlayerInput playerInput) =>
• {
• // write the system behaviour here, example of movement input script:
• playerInput.horizontal = Input.GetAxis(“Horizontal”); // to refer to any horizontal input
• }
• )
• .Run();
• }
• }
• }

If I cannot figure out how to do things in ECS I might just do everything using Monobehaviours, but it would be very disappointing for me who enjoys coding not just to make my own small video games but also to simply keep learning new things and ways of thinking.

Thanks very much in advance for your help!

[Groupustule]

Ooooooh amazing, so many thanks Ryiah!!!

[zombiegorilla]

The thread was deleted for the reasons in the message. It was not deleted “without a word”, you got a message telling you why it was deleted. If you post in the wrong forum, and no one has responded it is deleted. The forum sections have clear descriptions (note that this forums description specifically states it is not for support), please read them before posting and post in the correct forum. It will save you time.

@angrypenguin

Having a thread deleted is pretty unusual. Normally they’re locked or moved or just left alone. If you’re 100% sure it posted successfully I’d ask someone like @UnityMaru about it.

It is actually pretty common, you just don’t see it because… well… they are deleted.
It is done for a simple reason, no one pays attention unless there is effort involved. I used to move threads for new users all the time with a friendly note to please post in the correct forum next time. Almost always their next thread would be in the wrong place with a comment to “please move if this is the wrong forum”. That is learnin’ them the wrong behaviour. And sucking up mod time. If they have to retype their message, they will likely post correctly the next time around. Win, win, win.

TL;DR

Read the forum descriptions and post in proper forum so you don’t have to type it twice.