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  3. TMeshAttributeArrayBase

TMeshAttributeArrayBase

This defines the container used to hold mesh element attributes of a particular name and index.

Unreal Engine C++ API Reference > Runtime > MeshDescription

References

   
Module MeshDescription
Header /Engine/Source/Runtime/MeshDescription/Public/MeshAttributeArray.h
Include #include "MeshAttributeArray.h"

Syntax

template<typename AttributeType>  
class TMeshAttributeArrayBase

Remarks

This defines the container used to hold mesh element attributes of a particular name and index. It is a simple TArray, so that all attributes are packed contiguously for each element ID.

Note that the container may grow arbitrarily as new elements are inserted, but it will never be shrunk as elements are removed. The only operations that will shrink the container are Initialize() and Remap().

Variables

  Type Name Description
Protected variable TArray< AttributeType > Container The actual container, represented by a regular array
Protected variable uint32 Extent Number of array elements in this attribute type

Constructors

  Type Name Description
Public function    

Functions

  Type Name Description
Public function Const const AttributeType *

GetData ()

 Return base of data
Public function Const const AttributeType *

GetElementBase ( const int32 Index
)

  
Public function AttributeType *

GetElementBase ( const int32 Index
)

  
Public function Const uint32  
Public function Const uint32

GetHash ( uint32 Crc
)

  
Public function Const uint32

GetHash ( uint32 Crc
)

 We have to manually implement this or else the default behavior will just hash FName ComparisonIndex and Number, which aren't deterministic
Public function void

Initialize ( const int32 ElementCount,
const AttributeType& Default
)

 Initializes the array to the given size with the default value
Public function void

Insert ( const int32 Index,
const AttributeType& Default
)

 Expands the array if necessary so that the passed element index is valid.
Public function Const int32

Num ()

 Return size of container
Public function void

Remap ( const TSparseArray< int32 >& IndexRemap,
const AttributeType& Default
)

 Remaps elements according to the passed remapping table
Public function void

SetNum ( const int32 ElementCount,
const AttributeType& Default
)

  
Public function void

SetToDefault ( const int32 Index,
const AttributeType& Default
)

 Fills the index with the default value

Operators

  Type Name Description
Public function Const const AttributeType &

operator[] ( const int32 Index
)

 Element accessors
Public function AttributeType &

operator[] ( const int32 Index
)

  

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