FChaosClothAssetTransferSkinWeightsNode::Evaluate

Navigation

API > API/Plugins > API/Plugins/ChaosClothAssetDataflowNodes > API/Plugins/ChaosClothAssetDataflowNodes/FChaosClothAssetTransferSkinWeig-

Description

The node takes a user-selected skinned SkeletalMesh asset and transfers the skin weights to a simulation/render meshes using a selected algorithm. You can either transfer to simulation and render meshes separately or transfer to both in one go using the TargetMeshType property. When transferring to render meshes, you can control the source of the transfer which can either be the body or the simulation mesh (recommended). In the latter case we always use the ClosestPointOnSurface algorithm.

InpaintWeights algorithm: Main algorithm for transferring weights, which is based on the "Robust Skin Weights Transfer via Weight Inpainting Siggraph Asia 2023". The implementation and explanation of the algorithm can be found in "Engine\Plugins\Runtime\GeometryProcessing\Source\DynamicMesh\Private\Operations\TransferBoneWeights.h(cpp)"

Handling of disconnected render meshes: It is usually the case that sim mesh is welded and manifold meaning that the inpaint method should always succeed and give the best results. However, the render mesh is often not welded and consists of multiple disconnected parts. This is usually fine, and inpaint should work well except in places where there is a big crease along the stitch (like armpit areas), so vertices that are close to each other can have very different normals which could potentially lead to different weights being computed. You can either try to increase the normal threshold or switch to the closest point method.

virtual void Evaluate  
(  
    UE::Dataflow::FContext & Context,  
    const FDataflowOutput * Out  
) const  
Copy full snippet

virtual void Evaluate (     UE::Dataflow::FContext & Context,     const FDataflowOutput * Out ) const