How do you update a UTextureRenderTarget2D in C++?

Question

I'm referenced @J. Rehbein's ask. How do you update a UTextureRenderTarget2D dynamically in C++?

And use public modules ("Core", "CoreUObject", "Engine", "InputCore", "UMG", "GameplayTasks", "Landscape", "RHI", "RenderCore").

Why printed assertion failed log?

How fix assertion failed problem?

Please, teachers.

void AWorldCreator::BeginPlay()
{
 Super::BeginPlay();
 if (RenderTarget != nullptr) {
   RenderTarget->InitCustomFormat(Width, Height, PF_B8G8R8A8, true);

   auto region = FUpdateTextureRegion2D(0, 0, 0, 0, Width, Height);

   FTexture2DRHIRef TextureRHI = RenderTarget->GameThread_GetRenderTargetResource()->GetRenderTargetTexture();

   ENQUEUE_RENDER_COMMAND(UpdateTextureRegionsData)(
   [=](FRHICommandListImmediate& RHICmdList)
     {
       check(TextureRHI.IsValid());  // Assertion failed line
     });
 }

}

Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. — Community, Oct 07 '21 at 12:41

score 0 · Answer 1 · answered Sep 30 '21 at 09:48

0

Texture->UpdateResource();
Texture->UpdateResourceImmediate(false);

answered Sep 30 '21 at 09:48

Thank you! but, sorry. I don't know how. \n RenderTarget->InitCustomFormat(Width, Height, PF_B8G8R8A8, true); RenderTarget->UpdateResource(); RenderTarget->UpdateResourceImmediate(false); I try this code. but failed. Please detailed answer me. please. – NedCrow Oct 01 '21 at 09:21

score 0 · Accepted Answer · answered Oct 09 '21 at 16:02

I want change URenderTargetTexture2D's texture. i'm tried how that use 2_DrawMaterial. And i feel hardness from how convert UMaterialInstanceDynamic to UMaterialInterface. So, next tried how that use ENQUEUE_RENDER_COMMAND. Blocked again. So I posted a question. Sorry and thanks everyone for read my awkward(weird?) question.

...

I succeed URenderTargetTexture2D updating without ENQUEUE_RENDER_COMMAND. I converted UMaterialInstanceDynamic to UMaterialInterface thought UStaticMeshComponent. I use UStaticMeshComponent's functions (GetMaterial, SetMaterial).

UMaterialInstanceDynamic* DynamicMaterial = UMaterialInstanceDynamic::Create(Material, GetWorld());
...
StaticMeshComponent->SetMaterial(0, DynamicMaterial);
...
canvas->K2_DrawMaterial(StaticMeshComponent->GetMaterial(0), Position, Size, CoordinatePosition);

Thank you.

How do you update a UTextureRenderTarget2D in C++?

2 Answers2