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f6a42df34a
The feature is disabled by default, and may be considered Beta for the current release. - Added support for passing an FSceneInstanceCullingQuery to Nanite::IRenderer::DrawGeometry - Added some more interface (inline) functions to Nanite::IRenderer to help guide the user. - Implemented FInstanceHierarchyCull_CS to handle the hierarchy culling in the Nanite culling passes. - Added FInstanceHierarchyAppendUncullable_CS to append "uncullable" instances - Adapted FCompactViewsVSM_CS to handle view group ranges, use with the new hierarchy - Moved VirtualShadowMapViews from FSortedShadowMaps to FShadowSceneRenderer (public -> private) #rb brian.karis,jamie.hayes #jira UE-147060 #preflight 6448d4961150e908d01f0049 [CL 25194831 by Ola Olsson in ue5-main branch]
90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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// 1 + 7 + 24 bits_
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#define INSTANCE_HIERARCHY_ITEM_CHUNK_COUNT_SHIFT (24u)
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#define INSTANCE_HIERARCHY_ITEM_CHUNK_ID_MASK ((1u << INSTANCE_HIERARCHY_ITEM_CHUNK_COUNT_SHIFT) - 1u)
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#define INSTANCE_HIERARCHY_ITEM_CHUNK_COMPRESSED_FLAG (1u << 31u)
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#define INSTANCE_HIERARCHY_ITEM_CHUNK_COMPRESSED_PAYLOAD_MASK ((1u << 31u) - 1u)
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#define INSTANCE_HIERARCHY_MAX_CHUNK_SIZE (64u)
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#ifdef __cplusplus
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#include "HLSLTypeAliases.h"
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namespace UE::HLSL
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{
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#endif
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#ifndef __cplusplus //HLSL
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#include "/Engine/Private/LargeWorldCoordinates.ush"
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#endif
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// Representation in hierarchy buffer
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struct FCellHeader
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{
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uint NumItemChunks;
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uint ItemChunksOffset;
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};
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struct FCellBlockData
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{
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FLWCVector3 WorldPos;
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float LevelCellSize; // Note, not the block size, but the cell size.
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uint Pad;
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};
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/**
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* Represent one item of work for the hierarchical culling stage, linking a cell to either a group of views (main-pass) or a singlular view (post-pass).
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*/
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struct FCellDraw
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{
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uint CellId;
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uint ViewGroupId;
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};
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/**
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* Represent one item of work for the post-pass of the hierarchical culling stage.
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*/
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struct FOccludedCellDraw
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{
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FCellDraw CellDraw;
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uint OccludedViewMask;
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uint Pad;
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};
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/**
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* Represents a group of views, e.g., for a clipmap or point light, or anything else really that share the same broad-phase culling result.
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* Wrt mip-views, there is no explicit handling in the hierarchical culling stage, as they are expected to come in a compact range (post view compaction)
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* A view group should typically share view flags, might want/need to make assumptions around that.
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*/
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struct FViewDrawGroup
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{
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uint FirstView;
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uint NumViews;
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};
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// Info for one instance culling workgroup (64 threads).
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// TODO: Pack/unpack into fewer bits?
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// TODO: Move to some nanite specific header probably.
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struct FInstanceCullingGroupWork
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{
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uint ViewGroupId;
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uint PackedItemChunkDesc;
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uint ActiveViewMask; // Up to 32 active views in the group (NOTE: this may overflow for example if all mip levels were mapped at the same time on a point light, 48 mips)
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uint Pad;
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};
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#ifdef __cplusplus
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} // namespace
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using FCellHeader = UE::HLSL::FCellHeader;
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using FCellBlockData = UE::HLSL::FCellBlockData;
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using FCellDraw = UE::HLSL::FCellDraw;
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using FOccludedCellDraw = UE::HLSL::FOccludedCellDraw;
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using FViewDrawGroup = UE::HLSL::FViewDrawGroup;
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using FInstanceCullingGroupWork = UE::HLSL::FInstanceCullingGroupWork;
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#endif
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