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FIndexSet

[FIndexSet](API\Plugins\Learning\FIndexSet) represents a set of indices - more specifically, either a slice of indices, or an ArrayView of int32 which acts as the set of indices.

API > API/Plugins > API/Plugins/Learning

References

   
Module Learning
Header /Engine/Plugins/Experimental/LearningAgents/Source/Learning/Public/LearningArray.h
Include #include "LearningArray.h"

Syntax

struct FIndexSet

Remarks

FIndexSet represents a set of indices - more specifically, either a slice of indices, or an ArrayView of int32 which acts as the set of indices. This type is generally used when we have allocated arrays of data but only need to iterate over or update a subset. For example, if we allocate data for 100 instances, but only 10 of those instances are active we can use an FIndexSet to indicate which ones.

Having this type act as either a slice or array of int32 lets us write code once, but still allows the compiler to potentially generate both code paths (or we can write both paths manually, using ispc to be more efficient when we have a slice and don't require random reads/writes).

We can also attempt to automatically convert index sets which contain consecutive indices from arrays of int32 to slices using the `TryMakeSlice_ function for more efficient processing.

Constructors

  Type Name Description
Public function    
Public function  

FIndexSet ( const int32 InSingleIndex
)

  
Public function  

FIndexSet ( const TArrayView< const int32 > InIndices
)

  
Public function  

FIndexSet ( const TLearningArrayView< 1, const int32 > InIndices
)

  
Public function  

FIndexSet ( std::initializer_list< int32 > InIndices
)

  
Public function  

FIndexSet ( const TArray< int32, InAllocatorType >& InIndices
)

  
Public function  

FIndexSet ( const TLearningArray< 1, int32, InAllocatorType >& InIndices
)

  
Public function  

FIndexSet ( const int32 InSliceStart,
const int32 InSliceNum
)

  

Functions

  Type Name Description
Public function Const FIndexSetIterator

begin ()

  
Public function Const bool

Contains ( const int32 Index
)

  
Public function Const FIndexSetIterator

end ()

  
Public function Const TLearningArrayView< 1, const int32 >  
Public function Const int32  
Public function Const int32  
Public function Const bool

IsSlice ()

  
Public function Const int32

Num ()

  
Public function Const FIndexSet

Slice ( const int32 InStart,
const int32 InNum
)

  
Public function Const TArray< int32 >

ToArray ()

  
Public function bool Attempts to convert this IndexSet from a view of indices into a slice for more efficient processing.

Operators

  Type Name Description
Public function Const int32

operator[] ( const int32 Index
)

  
Public function FIndexSet &

operator= ( const TArray< int32, InAllocatorType >& InIndices
)

  
Public function FIndexSet &

operator= ( const int32 InSingleIndex
)

  
Public function FIndexSet &

operator= ( const TArrayView< const int32 > InIndices
)

  
Public function FIndexSet &

operator= ( TLearningArrayView< 1, const int32 > InIndices
)

  
Public function FIndexSet &

operator= ( const TLearningArray< 1, int32, InAllocatorType >& InIndices
)

  

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