+ Attribute structures to UAnimDataModel
* These are sampled/copied into AnimSequence whenever they change
+ Attribute related Notifies and Payloads
+ Controller API and Actions for Attribute related behaviour
+ Type traits (TAttributeTypeTraitsBase) to determine support functionality for user-defined attribute types
+ TAttributeContainer equivalent to TCustomAttributes, used for keeping track of attributes at runtime in a TMap similar fashion
* Has two exported specializations FStack/Heap-AttributeContainer
+ IAttributeBlendOperator interface used for Attribute related operations in Anim graph
* Allows for user-defined blending behaviour for their associated types
+ TAttributeBlendOperator providing out-of-the-box blending behaviour for user-defined types
+ FAttributeBlendData helper structure, this encapsulates and abstracts the blend / attribute operations
* Exposes two iterators, allowing BlendOperator to loop through (type) overlapping Attributes and unique attributes
+ Float/Integer/String Animation Attribute structures used to support legacy TVariant CustomAttribute data types
+ Transform animation attribute structure to add support for single-FTransform based attributes
+ FAnimationAttributeIdentifier identifier used to reference an attribute in a script-friendly manor
+ AttributeTypes static API for registering Attribute types
+ FAttributeCurve providing a curve-type with an Attribute type as its underlying key-value
+ TWrappedAttribute helper structure to wrap end template operate on raw memory (TArray buffer)
+ Added tests for
* Attribute related controller functionality and actions
* Attribute curve key reduction
* Evaluating attributes from AnimSequence
* Attribute operations (blend, accumulate etc)
* Functional testing for blendspace attribute evaluation and blending
* Changed default attribute blend type to Blend vs Override
* Updated FBX import/export paths to handle and use new Attribute data structures
* Attribute data is now incorporated into animation source data DDC key
* Deprecated Custom Attributes stored on AnimSequence get converted into their equivalent Attribute structures
* Deprecated all previous CustomAttribute structures, APIs and files
* Corrected some comments in UAnimDataController.h
* Updated existing custom attribute tests to adhere to new blend expectations/behaviour
* Updated AnimSequence resize tests to also incorporate an attribute curve
* Changed layered bone blend to use .5 blend weight vs 1.0 to cover more behaviour
* Added transform attribute used to compare against bone transform during pre-existing functional testing (blended only)
- Deleted CustomAttributes details customization
#rb Thomas.Sarkanen
#fyi kiaran.ritchie, koray.hagen, timothy.daoust
[CL 15568420 by Jurre deBaare in ue5-main branch]
#rnx
#rb none
#ROBOMERGE-OWNER: ryan.durand
#ROBOMERGE-AUTHOR: ryan.durand
#ROBOMERGE-SOURCE: CL 10869210 via CL 10869511 via CL 10869900
#ROBOMERGE-BOT: (v613-10869866)
[CL 10870549 by ryan durand in Main branch]
Merging using Fortnite_Main<->Fortnite_ControlRig
#rb none
#ROBOMERGE-OWNER: helge.mathee
#ROBOMERGE-AUTHOR: helge.mathee
#ROBOMERGE-SOURCE: CL 7321580 via CL 7323175
#ROBOMERGE-BOT: (v371-7306989)
[CL 7323351 by helge mathee in Main branch]
