Inject Shader between finished Velocity Buffer and Taa Shader

[sebastian.vesenmayer]

Hi,

we want to prototype some modifications on the TAA Shader.

Therefore we need to add a new input Texture in the TAA Shader.

We also need a Shaderpass between the finished Velocity Buffer and TAA invocation where we can read velocity buffer texture and write to the texture which the TAA shader should consume.

Are there any code samples to achieve this or can you give us some pseudo code, how to do it.

Thanks

Sebastian

[sweetluna]

Hi sebastian,

You can try using Render::CALLBACK_BEGIN_TAA and pass it to Render::addCallback.
To get velocity buffer - Render::getTextureGBufferVelocity.
To get temporary texture - Render::getTemporaryTexture.

Hope it helps!

[sebastian.vesenmayer]

Hi sweetluna,

thanks but a bit to high level and I run into problems here.

RenderTargetPtr rt;
TexturePtr texture;

void callbackBody()
{
	auto width = Renderer::getWidth();
	auto height = Renderer::getHeight();
	texture = Render::getTemporaryTexture(width, height, Unigine::Texture::FORMAT_RGBA8, Unigine::Texture::USAGE_READWRITE | Unigine::Texture::USAGE_RENDER);

	auto mat = Materials::findBaseMaterial("new_Pixels");
	Renderer::setMaterial(Render::PASS_POST, mat);
	if (!rt)
	{
		rt = RenderTarget::create();
	}
	rt->unbindAll();
	rt->enable();
	rt->bindColorTexture(0, Renderer::getTextureGBufferVelocity());
	//rt->bindUnorderedAccessTexture(0, texture, 0); //<- Crashes 

	Ffp::renderScreen();

	rt->disable();
	rt->unbindAll();
}

int AppWorldLogic::init()
{
	Render::addCallback(Render::CALLBACK_BEGIN_TAA, MakeCallback(callbackBody));
	return 1;
}

Code compiles but I get no screen ouput when callback gets executed asn sometimes crashes when Ffp::renderScreen gets executed.

I also cannot bind and Unordered Access Texture. It will crash immediatly when I try this.

And how do I get my texture into the TAA shader then?
Is there any in deep documentation or examples on these callbacks?
Thanks :)

[sebastian.vesenmayer]

Hi I managed to get it working with a compute shader now and have been able to move the texture to the taa shader.

Thanks.

[sebastian.vesenmayer]

Another question, in which shader does the value taa_pixel_offset gets applied?

[silent]

It's applied directly to the final projection (on CPU side):

 

[sebastian.vesenmayer]

Is it possible to overload this?

[silent]

I suppose so, you can try to do it in RENDER_CALLBACK_BEGIN_SCREEN (do a projection matrix compensation).