[unity][ecs] learning notes (I)

20220621

To make the 3 God , Finally, one System.

Learning video ：

https://www.youtube.com/watch?v=ILfUuBLfzGI&list=PLzDRvYVwl53s40yP5RQXitbT--IRcHqba&index=1&t=122shttps://www.youtube.com/watch?v=ILfUuBLfzGI&list=PLzDRvYVwl53s40yP5RQXitbT--IRcHqba&index=1&t=122s【 Game development 】Unity ECS DOTS course （ Collection ） Turn over ！_ Bili, Bili _bilibilihttps://www.youtube.com/watch?v=ILfUuBLfzGI&list=PLzDRvYVwl53s40yP5RQXitbT--IRcHqba&index=1 The download address of the source code of the automatically generated English subtitle project will be added later ：https://unitycodemonkey.com/video.php?v=ILfUuBLfzGIhttps://www.bilibili.com/video/av93838467/?vd_source=b2a6377adfb8c1346aecd5a89bc3b7e2 The official manual

Entities overview | Entities | 0.50.1-preview.2https://docs.unity3d.com/Packages/[email protected]/manual/index.htmlUnity edition ：2020.3.30

Entity edition ：0.51.0-privew.32

Problems encountered ：

1. introduce Entity After the package is compiled, an error is reported , The lack of API What? , Generally because Unity Version mismatch , Just adjust to the corresponding version according to the official manual , It's not that the higher the version, the better ,
2. Added System after , I didn't see the printed log, The reason is that I first installed a full set of bags according to the official documents , Didn't follow the tips in the learning video , installed Netcode, Lead to in DefaultWorld There is no System Generate , Inherit ComponentSystem Will be automatically Client and Server Two world Automatically generated in , But because of the correspondence world There are no qualified ones in the entity,Entities.ForEach It will lead to  Internal: JobTempAlloc has allocations that are more than 4 frames old - this is not allowed and likely a leak Warning , And the follow-up will continue to brush  Internal: deleting an allocation that is older than its permitted lifetime of 4 frames (age = 5) , If you follow the method in the learning video to add System, Be careful not to put the bag  Netcode Import the project .

References on the Forum ：

Manually created System does not update - Unity Forumhttps://forum.unity.com/threads/manually-created-system-does-not-update.882085/

  summary ：

Unity The best version is 2020.3.30, Because the current official examples are all this version , The official example git as follows

GitHub - Unity-Technologies/EntityComponentSystemSamplesContribute to Unity-Technologies/EntityComponentSystemSamples development by creating an account on GitHub.https://github.com/Unity-Technologies/EntityComponentSystemSamples Beginners only introduce what they need package,Netcode Don't introduce this before you know the basics .

China's official example project ：

unity-tech-cn/DOTSSample: The purpose of this project is to test and demonstrate simultaneously from Unity DOTS Multiple new packages for the technology stack . - DOTSSample - Plastic Hub DOTSSample - The purpose of this project is to test and demonstrate simultaneously from Unity DOTS Multiple new packages for the technology stack .https://plastichub.unity.cn/unity-tech-cn/DOTSSample

Example Engineering ：https://gitee.com/grimraider/unity-ecsdotshttps://gitee.com/grimraider/unity-ecsdots