Accessing Vertex Positions of static mesh

Development Programming & Scripting C++
35

's C++ codes are incredible! But it seems they are no longer working in updated versions, need fixed.

You have to add those headers, it’s critical:



#include "Components/StaticMeshComponent.h"
#include "Rendering/PositionVertexBuffer.h"
#include "Engine/StaticMesh.h"
#include "StaticMeshResources.h"

header:



#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Components/StaticMeshComponent.h"
#include "GetStaticMeshVertexes.generated.h"

UCLASS()
class EXPERIMENT_2_24_VER_API AGetStaticMeshVertexes : public AActor
{
        GENERATED_BODY()

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

public:
        // Sets default values for this actor's properties
        AGetStaticMeshVertexes();

protected:
        // Called when the game starts or when spawned
        virtual void BeginPlay() override;

public:
        // Called every frame
        virtual void Tick(float DeltaTime) override;

};

cpp:



#include "GetStaticMeshVertexes.h"
#include "Components/StaticMeshComponent.h"
#include "Rendering/PositionVertexBuffer.h"
#include "Engine/StaticMesh.h"
#include "StaticMeshResources.h"
#include "UObject/ConstructorHelpers.h"
#include "DrawDebugHelpers.h"


TArray<FVector> AGetStaticMeshVertexes::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->GetStaticMesh()) return vertices;
        if (!StaticMeshComponent->GetStaticMesh()->RenderData) return vertices;
        if (StaticMeshComponent->GetStaticMesh()->RenderData->LODResources.Num() > 0)
        {
        FPositionVertexBuffer* VertexBuffer = &StaticMeshComponent->GetStaticMesh()->RenderData->LODResources[0].VertexBuffers.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;
}

Thanks for everyone’s idea under this topic! Especially !!!:slight_smile: