1. Epic GamesDeveloper
  3. USkelMeshDNAUtils

USkelMeshDNAUtils

A utility class for updating SkeletalMesh joints, base mesh, morph targets and skin weights according to DNA data.

API > API/Plugins > API/Plugins/RigLogicModule

Inheritance Hierarchy

References

   
Module RigLogicModule
Header /Engine/Plugins/Animation/RigLogic/Source/RigLogicModule/Public/SkelMeshDNAUtils.h
Include #include "SkelMeshDNAUtils.h"

Syntax

UCLASS (Transient)  
class USkelMeshDNAUtils : public UObject

Remarks

A utility class for updating SkeletalMesh joints, base mesh, morph targets and skin weights according to DNA data. After the update, the render data is re-chunked.

Constructors

  Type Name Description
Public function  

USkelMeshDNAUtils ( const FObjectInitializer& ObjectInitializer
)

  

Functions

  Type Name Description
Public function Static FVector

ConvertDNAVertexToUE4CoordSystem ( FVector InVertexPositionInDNA
)

 Converts DNA vertex coordinates to UE4 coordinate system
Public function Static FVector

ConvertUE4CoordSystemToDNAVertex ( FVector InVertexPositionInUE4
)

 Converts UE4 coordinate system to DNA vertex coordinates
Public function Static FDNAToSkelMeshMap * Prepare context object that will allow mapping of DNA structures extracted from DNAAsset to SkelMesh ones for updating
Public function Static FDNAToSkelMeshMap * Prepare context object that will allow mapping of DNA structures to SkelMesh ones for updating
Public function Static UDNAAsset *

GetMeshDNA ( USkeletalMesh* InSkelMesh
)

 Gets the DNA asset embedded in the mesh
Public function Static void Rechunks the mesh after the updateRebuilds render data from LODModel and inits resources.
Public function Static void Re-initialize vertex positions for rendering after the update
Public function Static void

UpdateBaseMesh ( USkeletalMesh* InSkelMesh,
IDNAReader* InDNAReader,
FDNAToSkelMeshMap* InDNAToSkelMeshMap,
ELodUpdateOption InUpdateOption
)

 Updates the base mesh vertex positions for all mesh sections of all LODs, using the data from DNA file NOTE: Not calling RebuildRenderData automatically, it needs to be called explicitly after the first update As the topology doesn't change, for subsequent updates it can be ommited to gain performance
Public function Static void

UpdateJointBehavior ( USkeletalMeshComponent* InSkelMeshComponent
)

 Update joint behavior NOTE: DNAAsset->SetBehaviorReader needs to be called before this
Public function Static void

UpdateJoints ( USkeletalMesh* InSkelMesh,
IDNAReader* InDNAReader,
FDNAToSkelMeshMap* InDNAToSkelMeshMap
)

 Updates the positions, orientation and scale in the joint hierarchy using the data from DNA file
Public function Static void

UpdateMorphTargets ( USkeletalMesh* InSkelMesh,
IDNAReader* InDNAReader,
FDNAToSkelMeshMap* InDNAToSkelMeshMap,
ELodUpdateOption InUpdateOption
)

 Updates the morph targets for all mesh sections of LODs, using the data from DNA file
Public function Static void

UpdateSkinWeights ( USkeletalMesh* InSkelMesh,
IDNAReader* InDNAReader,
FDNAToSkelMeshMap* InDNAToSkelMeshMap,
ELodUpdateOption InUpdateOption
)

 Updates the skin weights for all LODs using the data from DNA file

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