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  3. UGeometryCacheTrack

UGeometryCacheTrack

Base class for GeometryCache tracks, stores matrix animation data and implements functionality for it

Unreal Engine C++ API Reference > Plugins > GeometryCache

Inheritance Hierarchy

References

   
Module GeometryCache
Header /Engine/Plugins/Runtime/GeometryCache/Source/GeometryCache/Classes/GeometryCacheTrack.h
Include #include "GeometryCacheTrack.h"

Syntax

UCLASS (CollapseCategories, HideCategories=Object, BlueprintType, Config=Engine)  
class UGeometryCacheTrack : public UObject

Remarks

Base class for GeometryCache tracks, stores matrix animation data and implements functionality for it

Variables

  Type Name Description
Protected variable UProperty Category visibleanywhere float Duration The duration of this track's animation.
Protected variable TArray< FMatrix > MatrixSamples Matrix sample data, both FMatrix and time
Protected variable TArray< float > MatrixSampleTimes  
Protected variable uint32 NumMaterials Number of materials for this track

Constructors

  Type Name Description
Public function  

UGeometryCacheTrack ( const FObjectInitializer& ObjectInitializer
)

  

Destructors

  Type Name Description
Public function Virtual    

Functions

  Type Name Description
Public function Virtual void

AddMatrixSample ( const FMatrix& Matrix,
const float SampleTime
)

 AddMatrixSample, Adds a single matrix animation sample (recalculates duration according to SampleTime)
Protected function const uint32

FindSampleIndexFromTime ( const TArray< float >& SampleTimes,
const float Time,
const bool bLooping
)

 FindSampleIndexFromTime uses binary search to find the closest index to Time inside Samples
Public function Virtual float Get the value of the duration property.
Public function Virtual Const uint64

GetHash ()

 Return the hash of the mesh data of the track
Public function Virtual Const const float GetMaxSampleTime, returns the time for the last sample Not the same as the animation length since it might not start at time 0
Public function Virtual bool

GetMeshDataAtSampleIndex ( int32 SampleIndex,
FGeometryCacheMeshData& OutMeshData
)

 Get the mesh data for the specified sample index
Public function Virtual bool

GetMeshDataAtTime ( float Time,
FGeometryCacheMeshData& OutMeshData
)

 Get the mesh data for the specified time
Public function Const const uint32 GetNumMaterials, total number of materials inside this track (depends on batches)
Public function Virtual const FGeometryCacheTrackSampleInfo &

GetSampleInfo ( float Time,
const bool bLooping
)

 Get the info for the sample displayed at the given time.
Public function Virtual void

SetDuration ( float NewDuration
)

 Set the duration property.
Public function Virtual void

SetMatrixSamples ( const TArray< FMatrix >& Matrices,
const TArray< float >& SampleTimes
)

 SetMatrixSamples, Set the Matrix animation Samples
Public function Virtual const bool

UpdateBoundsData ( const float Time,
const bool bLooping,
const bool bIsPlayingBackward,
int32& InOutBoundsSampleIndex,
FBox& OutBounds
)

 UpdateBoundsData
Public function Virtual const bool

UpdateMatrixData ( const float Time,
const bool bLooping,
int32& InOutMatrixSampleIndex,
FMatrix& OutWorldMatrix
)

 UpdateMatrixData
Public function Virtual const bool

UpdateMeshData ( const float Time,
const bool bLooping,
int32& InOutMeshSampleIndex,
FGeometryCacheMeshData*& OutMeshData
)

 UpdateMeshData*
Public function Virtual void

UpdateTime ( float Time,
bool bLooping
)

 Update the current time of the track

Overridden from UObject

  Type Name Description
Public function Virtual void

GetResourceSizeEx ( FResourceSizeEx& CumulativeResourceSize
)

 Get the size of the object/resource for use in memory tools or to display to artists/LDs in the Editor This is the extended version which separates up the used memory into different memory regions (the actual definition of which may be platform specific).
Public function Virtual void Handles reading, writing, and reference collecting using FArchive.

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