Traktor: Rewrote TAA; a lot cheaper and visually stable.

code/World/Shared/Passes/PostProcessPass.cpp

@@ -166,7 +166,7 @@ void PostProcessPass::setup(
 	uint32_t frameCount,
 	render::RenderGraph& renderGraph,
 	render::handle_t gbufferTargetSetId,
-	const DoubleBufferedTarget& velocityTargetSetId,
+	render::handle_t velocityTargetSetId,
 	const DoubleBufferedTarget& visualTargetSetId,
 	render::handle_t outputTargetSetId
 ) const
@@ -192,8 +192,7 @@ void PostProcessPass::setup(
 	igctx.associateTextureTargetSet(s_handleInputColorLast, visualTargetSetId.previous, 0);
 	igctx.associateTextureTargetSet(s_handleInputDepth, gbufferTargetSetId, 0);
 	igctx.associateTextureTargetSet(s_handleInputNormal, gbufferTargetSetId, 1);
-	igctx.associateTextureTargetSet(s_handleInputVelocity, velocityTargetSetId.current, 0);
-	igctx.associateTextureTargetSet(s_handleInputVelocityLast, velocityTargetSetId.previous, 0);
+	igctx.associateTextureTargetSet(s_handleInputVelocity, velocityTargetSetId, 0);
 	igctx.associateTexture(s_handleInputColorGrading, m_colorGrading);
 
 	// Expose gamma, exposure and jitter.

code/World/Shared/Passes/PostProcessPass.h

@@ -51,7 +51,7 @@ class PostProcessPass : public Object
 		uint32_t frameCount,
 		render::RenderGraph& renderGraph,
 		render::handle_t gbufferTargetSetId,
-		const DoubleBufferedTarget& velocityTargetSetId,
+		render::handle_t velocityTargetSetId,
 		const DoubleBufferedTarget& visualTargetSetId,
 		render::handle_t outputTargetSetId
 	) const;

code/World/Shared/Passes/VelocityPass.cpp

@@ -1,6 +1,6 @@
 /*
  * TRAKTOR
- * Copyright (c) 2023 Anders Pistol.
+ * Copyright (c) 2023-2024 Anders Pistol.
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -31,12 +31,6 @@ namespace traktor::world
 
 const resource::Id< render::ImageGraph > c_velocityPrime(L"{CB34E98B-55C9-E447-BD59-5A1D91DCA88E}");
 
-const render::Handle s_handleVelocityTargetSet[] =
-{
-	render::Handle(L"World_VelocityTargetSet_Even"),
-	render::Handle(L"World_VelocityTargetSet_Odd")
-};
-
 	}
 
 T_IMPLEMENT_RTTI_CLASS(L"traktor.world.VelocityPass", VelocityPass, Object)
@@ -73,7 +67,7 @@ bool VelocityPass::create(resource::IResourceManager* resourceManager, render::I
 	return true;
 }
 
-DoubleBufferedTarget VelocityPass::setup(
+render::handle_t VelocityPass::setup(
 	const WorldRenderView& worldRenderView,
     const GatherView& gatheredView,
 	uint32_t frameCount,
@@ -91,16 +85,12 @@ DoubleBufferedTarget VelocityPass::setup(
 	rgtd.referenceWidthDenom = 1;
 	rgtd.referenceHeightDenom = 1;
 	rgtd.targets[0].colorFormat = render::TfR16G16F;
-	const DoubleBufferedTarget velocityTargetSetId =
-	{
-		renderGraph.addPersistentTargetSet(L"Velocity Previous", s_handleVelocityTargetSet[frameCount % 2], false, rgtd, outputTargetSetId, outputTargetSetId),
-		renderGraph.addPersistentTargetSet(L"Velocity Current", s_handleVelocityTargetSet[(frameCount + 1) % 2], false, rgtd, outputTargetSetId, outputTargetSetId)
-	};
+	const render::handle_t velocityTargetSetId = renderGraph.addTransientTargetSet(L"Velocity", rgtd, outputTargetSetId, outputTargetSetId);
 
 	// Add Velocity render pass.
 	Ref< render::RenderPass > rp = new render::RenderPass(L"Velocity");
 	rp->addInput(gbufferTargetSetId);
-	rp->setOutput(velocityTargetSetId.current, render::TfDepth, render::TfColor | render::TfDepth);
+	rp->setOutput(velocityTargetSetId, render::TfDepth, render::TfColor | render::TfDepth);
 
 	if (m_velocityPrime)
 	{

code/World/Shared/Passes/VelocityPass.h

@@ -45,7 +45,7 @@ class VelocityPass : public Object
 
 	bool create(resource::IResourceManager* resourceManager, render::IRenderSystem* renderSystem, const WorldCreateDesc& desc);
 
-	DoubleBufferedTarget setup(
+	render::handle_t setup(
 		const WorldRenderView& worldRenderView,
 		const GatherView& gatheredView,
 		uint32_t frameCount,

code/World/WorldHandles.cpp

@@ -105,7 +105,6 @@ const render::Handle s_handleInputColorLast(L"InputColorLast");
 const render::Handle s_handleInputDepth(L"InputDepth");
 const render::Handle s_handleInputNormal(L"InputNormal");
 const render::Handle s_handleInputVelocity(L"InputVelocity");
-const render::Handle s_handleInputVelocityLast(L"InputVelocityLast");
 const render::Handle s_handleInputColorGrading(L"InputColorGrading");
 
 // Persistent targets.

code/World/WorldHandles.h

@@ -115,7 +115,6 @@ extern const render::Handle T_DLLCLASS s_handleInputColorLast;
 extern const render::Handle T_DLLCLASS s_handleInputDepth;
 extern const render::Handle T_DLLCLASS s_handleInputNormal;
 extern const render::Handle T_DLLCLASS s_handleInputVelocity;
-extern const render::Handle T_DLLCLASS s_handleInputVelocityLast;
 extern const render::Handle T_DLLCLASS s_handleInputColorGrading;
 
 // Persistent targets.

code/World/WorldTypes.cpp

@@ -19,11 +19,26 @@ const EntityState EntityState::All		= {  true,  true,  true };
 
 Vector2 jitter(int32_t count)
 {
-	const Vector2 kernelSize(0.5f, 0.5f);
-	return Vector2(
-		(float)((count / 2) & 1) * kernelSize.x - (2.0f * kernelSize.x) / 3.0f,
-		(float)(count & 1) * kernelSize.y - (2.0f * kernelSize.y) / 3.0f
-	);
+	const static Vector2 c_halton[] =
+	{
+		Vector2(0.500000f, 0.333333f),
+		Vector2(0.250000f, 0.666667f),
+		Vector2(0.750000f, 0.111111f),
+		Vector2(0.125000f, 0.444444f),
+		Vector2(0.625000f, 0.777778f),
+		Vector2(0.375000f, 0.222222f),
+		Vector2(0.875000f, 0.555556f),
+		Vector2(0.062500f, 0.888889f),
+		Vector2(0.562500f, 0.037037f),
+		Vector2(0.312500f, 0.370370f),
+		Vector2(0.812500f, 0.703704f),
+		Vector2(0.187500f, 0.148148f),
+		Vector2(0.687500f, 0.481481f),
+		Vector2(0.437500f, 0.814815f),
+		Vector2(0.937500f, 0.259259f),
+		Vector2(0.031250f, 0.592593f)
+	};
+	return c_halton[count % sizeof_array(c_halton)] - Vector2(0.5f, 0.5f);
 }
 
 }