Accessing Vertex Positions of static mesh

Development Programming & Scripting C++
3

Thanks a lot , that worked! :smiley:

Next sushi is on me!

Here’s the code for everyone:

Header:



#pragma once

#include "Components/StaticMeshComponent.h"
#include "CorridorBlueprintFunctionLib.generated.h"

UCLASS(MinimalAPI)
class ACorridorBlueprintFunctionLib : public AActor
{
	GENERATED_UCLASS_BODY()

	UFUNCTION(BlueprintPure, Category = "Corridor", meta = (Keywords = "corridor vertex mesh meshdata", NativeBreakFunc))
	TArray<FVector> MeshData(const UStaticMeshComponent* StaticMeshComponent);
};

and the cpp:



#include "UObjectPluginPrivatePCH.h"
#include "CorridorBlueprintFunctionLib.h"
#include "Components/StaticMeshComponent.h"

ACorridorBlueprintFunctionLib::ACorridorBlueprintFunctionLib(const class FPostConstructInitializeProperties& PCIP)
: Super(PCIP)
{
}

TArray<FVector> ACorridorBlueprintFunctionLib::MeshData(const UStaticMeshComponent* StaticMeshComponent)
{
	TArray<FVector> vertices = TArray<FVector>();

	//~~~~~~~~~~~~~~~~~~~~
	// Many thanks to  for this solution! :)
	//
	// Vertex Buffer
	if (!IsValidLowLevel()) return vertices;
	if (!StaticMeshComponent) return vertices;
	if (!StaticMeshComponent->StaticMesh) return vertices;
	if (!StaticMeshComponent->StaticMesh->RenderData) return vertices;

	if (StaticMeshComponent->StaticMesh->RenderData->LODResources.Num() > 0)
	{
		FPositionVertexBuffer* VertexBuffer = &StaticMeshComponent->StaticMesh->RenderData->LODResources[0].PositionVertexBuffer;
		if (VertexBuffer)
		{
			const int32 VertexCount = VertexBuffer->GetNumVertices();
			for (int32 Index = 0; Index < VertexCount; Index++)
			{
				//This is in the Static Mesh Actor Class, so it is location and tranform of the SMActor
				const FVector WorldSpaceVertexLocation = GetActorLocation() + GetTransform().TransformVector(VertexBuffer->VertexPosition(Index));
				//add to output FVector array
				vertices.Add(WorldSpaceVertexLocation);
			}
		}
	}	
	
	return vertices;
}

Many thanks again . Now we can continue with our corridors YAY :smiley:

Happy coding.

Ruben