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Implement shadows rendering to direct light atlas (with Glboal SDF tracing)

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Wojciech Figat
2022-04-14 16:26:45 +02:00
parent 0668a23167
commit d52e70af6c
4 changed files with 61 additions and 13 deletions
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21
Source/Engine/Renderer/GlobalSurfaceAtlasPass.cpp
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@@ -32,7 +32,8 @@ PACK_STRUCT(struct Data0
{
Vector3 ViewWorldPos;
float ViewNearPlane;
Vector3 Padding00;
Vector2 Padding00;
float LightShadowsStrength;
float ViewFarPlane;
Vector4 ViewFrustumWorldRays[4];
GlobalSignDistanceFieldPass::GlobalSDFData GlobalSDF;
@@ -51,7 +52,7 @@ PACK_STRUCT(struct AtlasTileVertex
struct GlobalSurfaceAtlasTile : RectPack<GlobalSurfaceAtlasTile, uint16>
{
Vector3 ViewDirection;
Vector3 ViewPosition; // TODO: use from ViewMatrix
Vector3 ViewPosition;
Vector3 ViewBoundsSize;
Matrix ViewMatrix;
@@ -428,7 +429,6 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
// Insert tile into atlas
auto* tile = surfaceAtlasData.AtlasTiles->Insert(tileResolution, tileResolution, 0, &surfaceAtlasData, e.Actor, tileIndex);
// TODO: try to perform atlas defragmentation if it's full (eg. max once per ~10s)
if (tile)
{
if (!object)
@@ -680,7 +680,10 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
// Copy emissive light into the final direct lighting atlas
// TODO: test perf diff when manually copying only dirty object tiles and dirty light tiles
context->CopyTexture(surfaceAtlasData.AtlasDirectLight, 0, 0, 0, 0, surfaceAtlasData.AtlasEmissive, 0);
{
PROFILE_GPU_CPU("Copy Emissive");
context->CopyTexture(surfaceAtlasData.AtlasDirectLight, 0, 0, 0, 0, surfaceAtlasData.AtlasEmissive, 0);
}
context->SetViewportAndScissors(Viewport(0, 0, resolution, resolution));
context->SetRenderTarget(surfaceAtlasData.AtlasDirectLight->View());
@@ -689,6 +692,11 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
context->BindSR(2, surfaceAtlasData.AtlasGBuffer2->View());
context->BindSR(3, surfaceAtlasData.AtlasDepth->View());
context->BindSR(4, surfaceAtlasData.ObjectsBuffer.GetBuffer()->View());
for (int32 i = 0; i < 4; i++)
{
context->BindSR(i + 5, bindingDataSDF.Cascades[i]->ViewVolume());
context->BindSR(i + 9, bindingDataSDF.CascadeMips[i]->ViewVolume());
}
context->BindCB(0, _cb0);
Data0 data;
data.ViewWorldPos = renderContext.View.Position;
@@ -717,6 +725,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
const bool useShadow = CanRenderShadow(renderContext.View, light);
// TODO: test perf/quality when using Shadow Map for directional light (ShadowsPass::Instance()->LastDirLightShadowMap) instead of Global SDF trace
light.SetupLightData(&data.Light, useShadow);
data.LightShadowsStrength = 1.0f - light.ShadowsStrength;
context->UpdateCB(_cb0, &data);
context->SetState(_psDirectLighting0);
VB_DRAW();
@@ -743,6 +752,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
// Draw draw light
const bool useShadow = CanRenderShadow(renderContext.View, light);
light.SetupLightData(&data.Light, useShadow);
data.LightShadowsStrength = 1.0f - light.ShadowsStrength;
context->UpdateCB(_cb0, &data);
context->SetState(_psDirectLighting1);
VB_DRAW();
@@ -769,6 +779,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
// Draw draw light
const bool useShadow = CanRenderShadow(renderContext.View, light);
light.SetupLightData(&data.Light, useShadow);
data.LightShadowsStrength = 1.0f - light.ShadowsStrength;
context->UpdateCB(_cb0, &data);
context->SetState(_psDirectLighting1);
VB_DRAW();
@@ -779,6 +790,8 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
// TODO: indirect lighting apply to get infinite bounces for GI
// TODO: explore atlas tiles optimization with feedback from renderer (eg. when tile is sampled by GI/Reflections mark it as used, then sort tiles by importance and prioritize updates for ones frequently used)
#undef WRITE_TILE
return false;
}