yeyeyeye, but probably not a very deep dive cause people have done a entt thing and going too deep would probably be less eficient then using smth like entt
@@user-hx4nz7bf4m That being said, entt is actually really well documented by the author.. And he even has some blog poster about different decisions he made while making entt.. So wouldn't be too difficult for Cherno to recreate entt and show us how he did it.. also pretty sure the author would appreciate the coverage :)
I really like how you split this topic into theory on a whiteboard in the first video and then actually looking at and implementing it in practice in the 2nd video. Made it much easier to understand! Thanks! Keep up the great videos, I'm loving this series! :)
Hey Cherno just wanted to really thank you for all the effort you put in your videos to help us become better developers. I've been working on a 3D physics engine for the past 2 months and this whole concept of ECS was foreign to me until I stumbled across your video and it opened up so many possibilities. Thanks man
I think a series about writing an ECS would be cool, but I'd also be okay with you just taking an episode or two to dive into EnTT and discuss how it works and possibly why it does things the way it does them.
I'm actually so glad you've decided to opt for a third-party library like EnTT. I think it really shows that' you're serious because you're not trying to tackle literally everything on your own. You would never get a performant engine if you tried to do it all yourself. Love the videos though, keep it up!
I think pronouncing Entt as "en-two-T" is a good idea. It's common to replace repeated letters in acronyms with numbers, it sounds closer to the intent of whoever named Entt, and it's also not confused with entity!
Hey Cherno! Can you make a video talking a little more about the legal side of things? Like saving the license and how that is the right way to go about it and why. I am very ignorant to that whole side of coding, especially with noise algorithms lol
you don't need to provide any constructors (default or not) if the class or struct can be aggregate initialized, you're just adding more code at that point.
Okay so now i gotta know where this man learned c++ so well. Cause 5 years of uni doesnt seem like the time i have rn - i need to make a game and this man just did a few things that i would do a lot worse.
I use Cereal, and couldn't figure out how to hook up EnTT to Cereal for serialization either. I asked Skypjack but the answer he gave was a bit over my head
As I good understand the ECS, we should not put into components any pointers. Because if we put a pointer into component then we need to access the data from ram, but that is slower than accessing it from cache. Am I right?
19:30 I remember Cherno also did this previously in timestep class and I wonder if its same as a function object. Because a function object would be like a normal operator overloading where you write the return type and then operator() and then another () for parameters but that seems strange to me. Could anyone please explain?
Hello from France! An ECS is just a way to separate data from code, you're not constrained to use it in the context of game dev. As an example, ArcGIS runtime SDK uses EnTT internally for its rendering engine. That being said, and although I'm not by any means an expert in your field, I'd say that an efficient representation of spatial data will make use of spatial partitioning in one form or another which is a completely orthogonal topic, not covered by the EnTT lib. Maybe have a look at quadtree / octree / k-D-tree implementations, I'd guess that's what you're after?
You should do a reaction to the unreal engine next gen games unreal fest online 2020 video. It goes further in depth with the tech behind the unreal engine 5 tech demo.
Depending on how thin of a wrapper it is, there might even be zero overhead, but let's say there was, chances are the rest of the logic going on during the execution of a game (physics, rendering & lighting, etc) will completely overshadow any overhead the wrapper could have to the point of it being zero
Have you planned to do public non-patreon livestreams on this channel at some point? You could be more productive since you had more time and would have a chat where we could get involved
Are you planning to make scripting language or use scripting language like lua? or use c++ hot reloading? I'm more intrigued how are you gonna add the component through what script language.
come on Yan .. isn't that kinda contradicting your words about the "event system" (you said: i first want to have this done before we move on) and now you are like: who cares about an ECS - i just want to do graphics?! you know you will need an ECS to handle scene data and render it ;)
This is no longer the same api inside entt. for example .has is no longer available. It is so bad that API like that removes, without even mention it in the latest versions. So, since the game engine is not updated at the FREE version, this video is useless. You cannot use the information in the video (some part of it).
A prime illustration of the ‘not invented here’ syndrome .... ‘i read docs for 10 minutes, could not understand it... wrote my own” ... sorry dude, that makes u a bad programmer in my book.. and a dangerous one at that, because you can write a lot of ‘damn that doc, lets write my own’ code.... ;-)
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28:08 ENTT - really powerful
28:09 ENTT - really fast
28:12 ENTT - really good
MEME
That's what she said.
28:06 ENTT - really simple
28:08 ENTT - really powerful
28:09 ENTT - really fast
28:12 ENTT - really good
"When I write code, I do it in American." - Yan, 2020
Would love to see a standalone series on making an ECS!
I too, would love to see a pure ECS from scratch.
Me too, would be great
yeyeyeye, but probably not a very deep dive cause people have done a entt thing and going too deep would probably be less eficient then using smth like entt
@@user-hx4nz7bf4m That being said, entt is actually really well documented by the author.. And he even has some blog poster about different decisions he made while making entt.. So wouldn't be too difficult for Cherno to recreate entt and show us how he did it.. also pretty sure the author would appreciate the coverage :)
Well i took a look at the ECS source...it's probably more lines of code than the game engine it's self. So good look with that.
Title: EnTT
Means: Entity
My brain: EnTEETEE
big TT goth ecs
I really like how you split this topic into theory on a whiteboard in the first video and then actually looking at and implementing it in practice in the 2nd video. Made it much easier to understand! Thanks! Keep up the great videos, I'm loving this series! :)
Hey Cherno just wanted to really thank you for all the effort you put in your videos to help us become better developers. I've been working on a 3D physics engine for the past 2 months and this whole concept of ECS was foreign to me until I stumbled across your video and it opened up so many possibilities.
Thanks man
Ahh finally after a looooong time....♥️
I think a series about writing an ECS would be cool, but I'd also be okay with you just taking an episode or two to dive into EnTT and discuss how it works and possibly why it does things the way it does them.
Nice! The engine is getting to a really nice place. Nice work Cherno!
Finally after waiting for almost a week for a new video. I was starting to get worried. Thank you sooo much.
1. if someone made C2676 error, replace 0 with entt::null
2. now .has for entt::registry no more support, replace with all_of or any_of
thx a lot!
Man, your videos are extremely useful. Thanks a ton
Yeah, good job! I'm really interested in, huge thank you!
27:00 .. let's just hit F5 and see what happens :D
Hey bro you are doing great work keep it up👍👍
I cannot live without this when working with c++
Very good one chernito
All I want is a keyboard pov camera.. god damn this man is flighing through the keys!
As always, nice video keep the great work
I'd like that as well, to pick up a few shortcuts he uses
I'm actually so glad you've decided to opt for a third-party library like EnTT. I think it really shows that' you're serious because you're not trying to tackle literally everything on your own. You would never get a performant engine if you tried to do it all yourself. Love the videos though, keep it up!
The video I didn't know I was waiting for. huh.
Yayy, another video! XD
I think pronouncing Entt as "en-two-T" is a good idea. It's common to replace repeated letters in acronyms with numbers, it sounds closer to the intent of whoever named Entt, and it's also not confused with entity!
On your next ECS video can you talk about entity hierarchy in Entt?
Hey Cherno! Can you make a video talking a little more about the legal side of things? Like saving the license and how that is the right way to go about it and why. I am very ignorant to that whole side of coding, especially with noise algorithms lol
thanks!
yesss ! ! !!!
Personally I think "N.T.T." is much more intuitive missed opportunity.
Plus, it's only one typo away from TNT, which I view as a positive thing.
you don't need to provide any constructors (default or not) if the class or struct can be aggregate initialized, you're just adding more code at that point.
Hey dude, I would like if you upload more c++ but videos, they help me alot and are really interesting
A week is a long time.
Okay so now i gotta know where this man learned c++ so well. Cause 5 years of uni doesnt seem like the time i have rn - i need to make a game and this man just did a few things that i would do a lot worse.
Its been 3 years, how far along have u been in c++ :)
I use Cereal, and couldn't figure out how to hook up EnTT to Cereal for serialization either. I asked Skypjack but the answer he gave was a bit over my head
Even visual studio struggles to load the code scrollbar thing on the right of the scree
will you provide an api (through jni/jna maybe?) for java developers to be able to use hazel?
W4rd3nclyffe yeah JNI I also thought about that this would be awesome :)
As I good understand the ECS, we should not put into components any pointers. Because if we put a pointer into component then we need to access the data from ram, but that is slower than accessing it from cache. Am I right?
19:30 I remember Cherno also did this previously in timestep class and I wonder if its same as a function object. Because a function object would be like a normal operator overloading where you write the return type and then operator() and then another () for parameters but that seems strange to me. Could anyone please explain?
That is an user-defined conversion function. Quite exoteric!
2:48 EnTT Intro
终于等到了
Hi Cherno. Just a quick suggestion.
Use higher zoom in your browser and file system. It's a bit hard to read at 1080p.
Cheers, mate.
Is it something applicable for geospatial data ?
3d point cloud, vectors (linestring, polygons,...), multi-band images/rasters, terrain models, ....
Hello from France! An ECS is just a way to separate data from code, you're not constrained to use it in the context of game dev. As an example, ArcGIS runtime SDK uses EnTT internally for its rendering engine.
That being said, and although I'm not by any means an expert in your field, I'd say that an efficient representation of spatial data will make use of spatial partitioning in one form or another which is a completely orthogonal topic, not covered by the EnTT lib. Maybe have a look at quadtree / octree / k-D-tree implementations, I'd guess that's what you're after?
You should do a reaction to the unreal engine next gen games unreal fest online 2020 video. It goes further in depth with the tech behind the unreal engine 5 tech demo.
If we're talking about something that's used so much in the program as an entity system, doesn't our custom wrapper make this a lot slower though?
Depending on how thin of a wrapper it is, there might even be zero overhead, but let's say there was, chances are the rest of the logic going on during the execution of a game (physics, rendering & lighting, etc) will completely overshadow any overhead the wrapper could have to the point of it being zero
should something like Entt be in boost, or be nominated for inclusion into boost?
is that operator at 19:30 called a 'user defined conversion function'?
I call them casting operators.
If your running into the error where "has" doesn't exist it has been renamed to "all_of"
I read in the deprecated comment that you should use "contains" .. I think they changed even that. It is just so bad.
Could you make a video about different kinds of ECS?
Like with event driven and such.
Writing your own (good) ECS would require also writing a memory management system. Allocators are fun to learn about though
why don't you use cmake?
Hi Cherno, can you please upload more videos on C++ series, it has been a while :)
New C++ video this Friday!
@@TheCherno Thanks!
Ah, finally. :D
how the hell do I include this single header file in my project without getting 200 errors????
Have you planned to do public non-patreon livestreams on this channel at some point? You could be more productive since you had more time and would have a chat where we could get involved
Yes! Planning to do some soon...
@@TheCherno Yayy :D
Cherno, please, please do a custom ECS!
Are you planning to make scripting language or use scripting language like lua? or use c++ hot reloading? I'm more intrigued how are you gonna add the component through what script language.
What he told in prior videos, he's planning for C# scripting unless I'm mistaken.
Ya i just see his latest video and he uses c# for scripting in physics. I am really looking forward how he implemented that and if he can add more.
18:15 I am german so no worries about me going to sue you about using proper english ;)
hello there
ob1 ken-o-bi!
Am I first?
Первый? Вроде третий
Haha titie
Maths is actually more correct . Also this is what functors are for...
come on Yan .. isn't that kinda contradicting your words about the "event system" (you said: i first want to have this done before we move on) and now you are like: who cares about an ECS - i just want to do graphics?!
you know you will need an ECS to handle scene data and render it ;)
@M. de k. oh wow .. you know Cherno better than he knows himself ... you must be some kind of mind reader :P
@@herrdingenz6295 😂😂😂
This is no longer the same api inside entt. for example .has is no longer available. It is so bad that API like that removes, without even mention it in the latest versions. So, since the game engine is not updated at the FREE version, this video is useless. You cannot use the information in the video (some part of it).
A prime illustration of the ‘not invented here’ syndrome .... ‘i read docs for 10 minutes, could not understand it... wrote my own” ... sorry dude, that makes u a bad programmer in my book.. and a dangerous one at that, because you can write a lot of ‘damn that doc, lets write my own’ code.... ;-)