UMeshElementsVisualizer::SetMeshAccessFunction

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SetMeshAccessFunction&40;&41;  
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SetMeshAccessFunction&40;&41;

Remarks

UMeshElementsVisualizer needs access to a mesh to generate it's data structures. However we may not be able to (or shouldn't) directly pass a pointer to UMeshElementsVisualizer. For example a UDynamicMeshComponent can expose it's internal mesh via a function ProcessMesh( TFunctionRef Func ). UMeshElementsVisualizer cannot directly call that function without knowing about the UDynamicMeshComponent, which we would like to avoid. So instead the client of UMeshElementsVisualizer provides a MeshAccessFunction that we can call with an internal function/lambda that UMeshElementsVisualizer internals will produce, that can be passed a const FDynamicMesh3& for processing (this is a ProcessDynamicMeshFunc). The job of the MeshAccessFunction is to call this ProcessDynamicMeshFunc on a FDynamicMesh3, which it may have direct access to, or it may get by calling (eg) UDynamicMeshComponent::ProcessMesh() internally.

So for example usage with a Tool that has a DynamicMeshComponent could be as follows: MeshElementsVisualizer->SetMeshAccessFunction(this { DynamicMeshComponent->ProcessMesh(ProcessFunc); }); And for usage with a mesh that a Tool class owns: MeshElementsVisualizer->SetMeshAccessFunction(this { ProcessFunc(MyInternalMesh); });