Instantiate Prefab Entity at runtime Using ECS 1.0

[@WAYNGames]

Hello, I just noticed an autocomplement mistake at 06:26 . I meant to use the BeginSimulationEntityCommandBufferSystem but it autocompleted with BeginFixedStepSimulationEntityCommandBufferSystem. This as no impact on this tutorial but know that the BeginFixedStepSimulationEntityCommandBufferSystem is executed at a fixed rate and that BeginSimulationEntityCommandBufferSystem is executed every frame.

[@hakanviajando]

Thank you for the continued videos. You are doing great job.

[@WAYNGames]

Glad you like it 🙂

[@markedforstrike]

SpawnerSystem gives me an error "Cannot assign members of variable because it is a foreach iteration variable" when I try to change TimeToNextSpawn((

[@WAYNGames]

Hello, not sure why you have this error. Maybe you missed the ValueRW part of the eexpression ? You can check the full code here : github.com/WAYN-Games/DOTS-Training/blob/DOTS-108/Assets/Scripts/Systems/SpawnerSystem.cs If you still can't solve it, feel free to come post your code in discord wayn.games/discord . it will be easier to have a look there ;).

[@핸섬맨-o8w]

Thanks for making a great video. Will LevelUp and SkillSystem be included in this project?

[@WAYNGames]

Thanks for the compliments. The target project is a tower defense prototype so it will have some simple mechanics such as damage, enemy health, and "currency" earning on enemy death to be able to place more towers. But it won't cover a way to make an extensible RPG type skill or level up system. I have been working on an ability/combat system using DOTS, old version is available on my GitHub, but it's fairly complex and uses the previous version of DOTS. I try to find the time to work on it and, once I'll have good progress, I'll probably make devlogs about it.

[@yurylebedev3161]

I've created a baker, but the query run with the SystemAPI does not return any results. Any ideas where the failure point might be?

[@WAYNGames]

Are you using the system API in the baker or in a baking system ?? You can come on discord if you want. It's more suited to share code snippets;)

[@yurylebedev3161]

@@WAYNGames Thanks for the response! I was able to get it to work by moving the prefab to a sub-scene

[@chengdun]

hello, must I make a reference to any prefab I need in subscene ? but the prefabs are loaded according to what player chooses. how could i do?

[@WAYNGames]

Hello, something along those lines is covered in the video about tower placement. You need to create some kind of repository of prefabs in a subscene and then use that repository in your system to spawn the desired prefab.

[@Gabriel-no6wv]

My cubes aren't rendering at all....

[@WAYNGames]

Do you have the entities graphics package ?

[@manuelraimondi4813]

How to stop system from spawning entities?

[@WAYNGames]

You can either disable the system that runs the spawning logic, add a component to the spawner entity and exclude it using the WithNone SystemAPI call, or you can simply destroy the spawner. In a more real game, you would probably have a set of waves were the spawner would spawn x numbers of enemy at y interval then wait for all enemies to be destroyed (or z amount of time ) and go to the next wave.

[@manuelraimondi4813]

@@WAYNGames Thanks a lot for the quick reply!!👏👏👏 I solved it like this: // ... public void OnUpdate(ref SystemState state) { var ecb = SystemAPI.GetSingleton() .CreateCommandBuffer(state.WorldUnmanaged); foreach (var spawner in SystemAPI.Query()) { if (spawner.ValueRO.Times > 0) { Entity e = ecb.Instantiate(spawner.ValueRO.Entity); spawner.ValueRW.Times = spawner.ValueRO.Times - 1; } else { state.Enabled = false; } } }

[@onerimeuse]

I didn't even know I wanted something in the game I'm working on that works like a carrier of some kind (robot, aircraft, etc.) but.. Uh... Well, where my notepad go... Time to add yo my design doc. 😂

[@mrbinggrae5954]

I am the first visitor of this video!

[@WAYNGames]

Thanks you for your continued support and interest in my content ! 😊

[@mrbinggrae5954]

@@WAYNGames You didn't add BurstCompile to your SpawnSystem!

[@WAYNGames]

@@mrbinggrae5954 You are right. On such a small project the impact is minimal, buit it's better take good habits ;).

[@mrbinggrae5954]

@@WAYNGames Shader [Universal Render Pipeline/Simple Lit] on [ms02_07_Skeleton] does not support skinning. This can result in incorrect rendering. Please see documentation for Linear Blend Skinning Node and Compute Deformation Node in Shader Graph.

[@WAYNGames]

Yes, that's the reason the skeleton is not animated. You'll see tomorrow how to animate it with hybrid approach. There are some options to animate with dots itself but it's even more experimental than ECS and involves lots of work. So I prefer waiting on the proper dots animation package.

[@MarekNijaki]

Up

[@doismilho]

why do you speak english like you're reading the words while speaking french? it's honestly very difficult to understand. I'm brazillian, by the way. Et je parle français aussi, c'est ma troisième langue. still, I had a hard time focusing on whatever you are saying. you should work on your pronunciation, either speak english or french! lol either way thanks for the content, this was very helpful to me.

[@WAYNGames]

Probably because I'm French 🤣. Hopefully it will get better with time. There are English and French subtitles on all videos if you have a hard time with my accent 😉.

[@doismilho]

@@WAYNGames sure, but I try to speak english with the english accent, not the brazillian pronunciation of sillabes and letters, you know. you ARE speaking french, just reading english words. I feel like french people do that more than other people.. also it's not like you're bad at english, in fact just the opposite! you clearly know more english than half the US population, I'd bet. xD

[@WAYNGames]

I'll do my best to improve this point, thanks for the honest feedback 😀

[@midomen100]

love to the le france napoleon bonaparte le baguette brother from your deutscher nachbar ja ja ! Nur liebe only love to us European brothers

[@midomen100]

@@doismilho If you can speak German with a German accent i will speak english with a english accent. You gotta watch a native english speaker if its so hard for you to understand. I understand him well and french guys have their own ways its nothing he should change.