#lockdown Nick.Penwarden
#rb none
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MAJOR FEATURES + CHANGES
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Change 3209340 on 2016/11/23 by Ben.Marsh
Convert UE4 codebase to an "include what you use" model - where every header just includes the dependencies it needs, rather than every source file including large monolithic headers like Engine.h and UnrealEd.h.
Measured full rebuild times around 2x faster using XGE on Windows, and improvements of 25% or more for incremental builds and full rebuilds on most other platforms.
* Every header now includes everything it needs to compile.
* There's a CoreMinimal.h header that gets you a set of ubiquitous types from Core (eg. FString, FName, TArray, FVector, etc...). Most headers now include this first.
* There's a CoreTypes.h header that sets up primitive UE4 types and build macros (int32, PLATFORM_WIN64, etc...). All headers in Core include this first, as does CoreMinimal.h.
* Every .cpp file includes its matching .h file first.
* This helps validate that each header is including everything it needs to compile.
* No engine code includes a monolithic header such as Engine.h or UnrealEd.h any more.
* You will get a warning if you try to include one of these from the engine. They still exist for compatibility with game projects and do not produce warnings when included there.
* There have only been minor changes to our internal games down to accommodate these changes. The intent is for this to be as seamless as possible.
* No engine code explicitly includes a precompiled header any more.
* We still use PCHs, but they're force-included on the compiler command line by UnrealBuildTool instead. This lets us tune what they contain without breaking any existing include dependencies.
* PCHs are generated by a tool to get a statistical amount of coverage for the source files using it, and I've seeded the new shared PCHs to contain any header included by > 15% of source files.
Tool used to generate this transform is at Engine\Source\Programs\IncludeTool.
[CL 3209342 by Ben Marsh in Main branch]
Rob asked me to back out GENERATED_*_BODY -> GENERATED_BODY change for now until the "_Validate and _Implementation auto-generation" discussion is over.
#codereview Robert.Manuszewski
[CL 2481343 by Jaroslaw Palczynski in Main branch]
Revised starter content so it is inserted into projects using feature packs.
Removed StarterContent source data from rocket build.
[CL 2438072 by Matthew Griffin in Main branch]
Also added code to display an icon on templates that have an equivalent feature pack.
Revised new project text to indicated what the icon is for.
[CL 2404695 by bruce nesbit in Main branch]
Moved starter content assets
Added mobile starter content assets
Starter content uses mobile starter content based on target platform
[CL 2372343 by bruce nesbit in Main branch]
* Categorized templates into Blueprint/C++ templates and organized them into tabs
* New categories can be specified in the templatedefs.ini file of a template project using a Category tag:
Category=NewCategory
* New category types can be registered with a proper description and icon in code through FGameProjectGenerationModule::RegisterTemplateCategory.
* Added preview images to templates
* Generally tidied the UI
This addresses TTP#321302 - EDITOR: Project Browser: Reduce Thumbnail size of Templates
Reviewed by Matt.Kuhlenschmidt
[CL 2260660 by Andrew Rodham in Main branch]
TTP# 333732 - EDITOR: The new project wizard falls back to using TP_TemplateName if it can't find a matching translation, even if an English translation is available
ReviewedBy Andrew.Rodham, Max.Preussner
[CL 2065413 by Jamie Dale in Main branch]
