Render Text on texture

Development Rendering
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1

Hi!

I need to render a texture with some text added dynamically. Once I have this I must render the result on geometry but I can’t find the way. I tried to use some Text Render Components but they have a bad performance and drop down my fps.

Thanks!

1 Like
2

I do this in c++ - if this is usefully you i can paste the code here.

3

I will be very greatfull! Thanks!

4

I’d have just dropped a CPP/H file I have but the cpp file got blocked. Fairly simple though in essence.

You’ll need a render target:

UTextureRenderTarget2D* RenderTexture = 0

Which needs to be created in one of your constructors

UTextTexture::UTextTexture(const class FObjectInitializer& PCIP)
	: Super(PCIP)
{
	RenderTexture = PCIP.CreateDefaultSubobject<UTextureRenderTarget2D>(this, TEXT("RenderTexture"));

It will need to be setup with a height and width

		RenderTexture->ClearColor = FLinearColor::Black;
		RenderTexture->InitAutoFormat(iWidth, iHeight);
		RenderTexture->UpdateResourceImmediate();

And then you can draw to it

	FCanvasTextItem txtItem(FVector2D(0.0f, 0.0f), txt, &rFontToUse, FLinearColor::Black);


	FCanvas Canvas(RenderTexture->GameThread_GetRenderTargetResource(), NULL, 0.0f, 0.0f, 0.0f, GMaxRHIFeatureLevel);	//UE4.5 GMaxRHIFeatureLevelValue);
	Canvas.Clear(FLinearColor::White);
	Canvas.DrawItem(txtItem, FVector2D(kMarginX, kMarginY));
	Canvas.Flush_GameThread(true);
5

Thanks! It works!

6

where do you put that code ?
what is PCIP ?