LineInstancedStaticMeshComponent.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "LineInstancedStaticMeshComponent.h"

#include "Components/InstancedStaticMeshComponent.h"
#include "Runtime/Engine/Private/InstancedStaticMesh.h"
#include "Runtime/Engine/Classes/Materials/MaterialInstanceDynamic.h"
#include "UObject/ConstructorHelpers.h"

#include "Runtime/Engine/Classes/Engine/Texture2D.h"


#include "OptiXModule.h"
#include "OptiXContextManager.h"


ULineInstancedStaticMeshComponent::ULineInstancedStaticMeshComponent(const FObjectInitializer& ObjectInitializer)
	: Super(ObjectInitializer)
{

	UE_LOG(LogTemp, Display, TEXT("ULineInstancedStaticMeshComponent Constructor"));


	SetGenerateOverlapEvents(false);

	static ConstructorHelpers::FObjectFinder<UStaticMesh>LineMeshAsset(TEXT("StaticMesh'/OptiX/Laser/cylinder.cylinder'"));
	UStaticMesh* LineAsset = LineMeshAsset.Object;
	SetStaticMesh(LineAsset);

	SetRenderCustomDepth(true);
	SetCastShadow(false);
	SetCollisionEnabled(ECollisionEnabled::NoCollision);


	SegmentsPerLine = 20;
	LineNumber = 16;

}

void ULineInstancedStaticMeshComponent::BeginPlay()
{
	Super::BeginPlay();
}

FPrimitiveSceneProxy* ULineInstancedStaticMeshComponent::CreateSceneProxy()
{

	FPrimitiveSceneProxy* Proxy = Super::CreateSceneProxy();

	if (!PerInstanceRenderData.IsValid() || PerInstanceSMData.Num() < 1 )
	{
		return Proxy;
	}

	//check(IsInGameThread());

	//bool bSupportsVertexHalfFloat = GVertexElementTypeSupport.IsSupported(VET_Half2);
	//int32 NumInstances = PerInstanceSMData.Num();
	int32 NumInstancesRenderData = PerInstanceRenderData->InstanceBuffer_GameThread->GetNumInstances();
	

	for (int32 Index = 0; Index < NumInstancesRenderData; ++Index)
	{
		int32 RenderIndex = InstanceReorderTable.IsValidIndex(Index) ? InstanceReorderTable[Index] : Index;
		if (RenderIndex == INDEX_NONE)
		{
			// could be skipped by density settings
			continue;
		}