Commit 79a06b80 authored by Oliver Mead's avatar Oliver Mead
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#+TITLE: DOTS Info
* Preface, "Why?"
Unity is in the midst of a transformation that will fundamentally change the way
games are written. While those changes are not in the mainstream distribution of
the engine, it is imminent. This document aims to consolidate and summarise
information on the requirements and use of this new Data-Oriented Technology
Stack, and serve as a reference for project setup and development in the future.
It is still a good idea to learn the `classic', object-oriented approach taken
by both our game development module and the current series of learning materials
that Unity provides. Much of the programming, concepts and techniques will still
be useful and will still be necessary with some changes.
* Required Packages
** DOTS Packages
Installing the DOTS packages requires opening the Package Manger within the
project (Select =Window > Package Manager=), then add by name (select from the
drop-down "+" menu). Enter the following package names (one at a time):
+ =com.unity.entities=
+ =com.unity.rendering.hybrid=
+ =com.unity.dots.editor=
+ =com.unity.physics= \leftarrow The re-implementation of the physics engine built on DOTS
These packages are marked experimental, so be sure to save often and make use of
good version control practices. Be sure to push changes to the remote repository
often, and use branches when writing and testing new functionality before merging
with parent branches.
I expect we will be working simultaneously so we can work out any issues, talk
about problems etc. together.
*** Domain Reload
As noted in the =entities= documentation, Domain Reload occurs when entering play
mode within the editor, and is especially slow when using DOTS. To disable this,
enable the "=Enter Play Mode Settings=" checkbox in the =Editor= section of the
Project Settings, while leaving its child options unchecked.
* Platform Packages
It is also necessary to install the DOTS based platform packages for Unity (The
default tool-chains will not be replaced by default).
Install, in the same way as above, the =com.unity.platforms.<platform>= packages,
where =<platform>= is the desired target, for example I will install =com.unity.platforms.linux=
and =com.unity.platforms.windows= to produce binaries for Linux and Windows.
* Builds
Building through the standard =File > Build and Run= or =<ctrl+b>= will not work
with DOTS. You must create a `Classic Build Configuration` for each target
platform through the asset manager: =+ > Build > <Platform> Classic Build
Configuration=. From now on you must build the project by selecting this
configuration and using the options shown in the inspector.
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