#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]
UETOOL-292 - Diffing of Behavior Trees doesn't work correctly
- Added support for diffing decorators and services.
- Ensured that you could see the properties of services and decorators in the diff tool.
- This is now using common code shared with the behavior tree editor (to avoid this getting out of sync again).
- Fixed an issue where nodes containing changes could still be drawn faded out.
- The "DiffR_" functions in GraphDiffControl weren't marking the node as changed since the diff results couldn't hold the information.
- Fixed SNodePanel::DeferredMovementTargetObject always moving the selection into view (rather than itself).
- Added a way to move to a node without also selecting it (SNodePanel::CenterObject).
- This is needed as decorators and services don't exist as top-level nodes in the SNodePanel, so can't be centered on. We instead have to center on their container node.
- Added a way to control what items you want to diff.
- This helps when checking for nodes that have been removed, as you can now avoid having to re-check all the other properties on the node, and just check for their existence (or lack thereof).
[CL 2533378 by Jamie Dale in Main branch]
UETOOL-213 - Minimize Slate FString -> FText conversion (remove SLATE_TEXT_ATTRIBUTE)
This fixes any editor/engine specific code that was passing text to Slate as FString rather than FText.
[CL 2399803 by Jamie Dale in Main branch]
Re-reversed the comparison order of passed-in Blueprint diffs & internally fixed the order of graph comparisons. Now other graphs compare correctly, as well as Blueprint comparisons still being correct.
TTP# 337672 - Behaviour Tree Editor: Visual Diffing of Behavior Trees displays some changes backwards and others not at all.
reviewed by Andrew.Brown
[CL 2113809 by Thomas Sarkanen in Main branch]
#add Added UEdGraphNode::GetNodeNativeTitle to return a native title for a node.
#add Added UEdGraphNode::GetNodeSearchTitle to return the native and localized title for a node, together, for searching.
#add Can hold "alt" over a node (in the graph panel, or the palette) to see the native name of the node.
#ttp 331252 - Blueprints: Editor: L10N: Blueprints need to consistently show localized node names and when searching need to search both the localized name and the native name
#codereview justin.sargent
[CL 2044506 by Michael Schoell in Main branch]
