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Move Global SDF towards the view direction

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This commit is contained in:
Wojciech Figat
2022-06-10 14:31:01 +02:00
parent f685c67275
commit aa58665740
1 changed files with 11 additions and 1 deletions
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12
Source/Engine/Renderer/GlobalSignDistanceFieldPass.cpp
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@@ -476,6 +476,16 @@ bool GlobalSignDistanceFieldPass::Render(RenderContext& renderContext, GPUContex
for (SceneRendering* scene : renderContext.List->Scenes)
sdfData.ListenSceneRendering(scene);
// Calculate origin for Global SDF by shifting it towards the view direction to account for better view frustum coverage
Vector3 viewOrigin = renderContext.View.Position;
{
Vector3 viewDirection = renderContext.View.Direction;
const float cascade0Distance = distanceExtent * cascadesDistanceScales[0];
const Vector2 viewRayHit = CollisionsHelper::LineHitsBox(viewOrigin, viewOrigin + viewDirection * (cascade0Distance * 2.0f), viewOrigin - cascade0Distance, viewOrigin + cascade0Distance);
const float viewOriginOffset = viewRayHit.Y * cascade0Distance * 0.6f;
viewOrigin += viewDirection * viewOriginOffset;
}
// Rasterize world geometry into Global SDF
renderContext.View.Pass = DrawPass::GlobalSDF;
uint32 viewMask = renderContext.View.RenderLayersMask;
@@ -498,7 +508,7 @@ bool GlobalSignDistanceFieldPass::Render(RenderContext& renderContext, GPUContex
const float cascadeVoxelSize = cascadeMaxDistance / resolution;
const float cascadeChunkSize = cascadeVoxelSize * GLOBAL_SDF_RASTERIZE_CHUNK_SIZE;
static_assert(GLOBAL_SDF_RASTERIZE_CHUNK_SIZE % GLOBAL_SDF_RASTERIZE_MIP_FACTOR == 0, "Adjust chunk size to match the mip factor scale.");
const Vector3 center = Vector3::Floor(renderContext.View.Position / cascadeChunkSize) * cascadeChunkSize;
const Vector3 center = Vector3::Floor(viewOrigin / cascadeChunkSize) * cascadeChunkSize;
//const Vector3 center = Vector3::Zero;
BoundingBox cascadeBounds(center - cascadeDistance, center + cascadeDistance);
// TODO: add scene detail scale factor to PostFx settings (eg. to increase or decrease scene details and quality)