You've already forked UnrealEngineUWP
mirror of
https://github.com/izzy2lost/UnrealEngineUWP.git
synced 2026-03-26 18:15:20 -07:00
e4bae00099
Requires two additional compute passes post-culling to compact the draw command instances. This feature is not currently supported on mobile platforms; more work is required to make instance compaction work with mobile vertex buffers. Updated ISM to use order preservation for meshes that render with a translucent material #rb ola.olsson, dmitriy.dyomin #jira none #preflight 61e98458c92021e535994cd7 #ROBOMERGE-AUTHOR: jamie.hayes #ROBOMERGE-SOURCE: CL 18676076 in //UE5/Release-5.0/... via CL 18676089 via CL 18676097 #ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v902-18672795) [CL 18679861 by jamie hayes in ue5-main branch]
57 lines
1.9 KiB
Plaintext
57 lines
1.9 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
|
|
|
|
#pragma once
|
|
|
|
#ifndef COMPACTION_BLOCK_NUM_INSTANCES
|
|
#error COMPACTION_BLOCK_NUM_INSTANCES must be defined
|
|
#endif
|
|
|
|
/** Determines number of compaction blocks required for the specified number of instances */
|
|
uint GetCompactionBlockCount(uint NumInstances)
|
|
{
|
|
return ((NumInstances - 1U) / COMPACTION_BLOCK_NUM_INSTANCES) + 1U;
|
|
}
|
|
|
|
/** Determines number of compaction blocks required for the specified number of instances */
|
|
uint GetCompactionBlockIndexFromInstanceIndex(uint InstanceIndex)
|
|
{
|
|
return InstanceIndex / COMPACTION_BLOCK_NUM_INSTANCES;
|
|
}
|
|
|
|
struct FPackedDrawCommandCompactionData
|
|
{
|
|
uint NumInstances_NumViews;
|
|
uint BlockOffset;
|
|
uint IndirectArgIndex;
|
|
uint SrcInstanceIdOffset;
|
|
uint DestInstanceIdOffset;
|
|
};
|
|
|
|
struct FDrawCommandCompactionData
|
|
{
|
|
/** The number of views for which the instances were written */
|
|
uint NumViews;
|
|
/** The total number of instances in the draw command */
|
|
uint NumInstances;
|
|
/** The offset of the first compaction "block" (group of N instances * NumViewIds) of the draw command */
|
|
uint BlockOffset;
|
|
/** The indirect argument index of the draw command */
|
|
uint IndirectArgIndex;
|
|
/** The offset of the input instance ID buffer for the start of the draw command before compaction */
|
|
uint SrcInstanceIdOffset;
|
|
/** The offset of the output instance ID buffer for the start of the draw command after compaction */
|
|
uint DestInstanceIdOffset;
|
|
};
|
|
|
|
FDrawCommandCompactionData UnpackDrawCommandCompactionData(FPackedDrawCommandCompactionData Data)
|
|
{
|
|
FDrawCommandCompactionData Output;
|
|
Output.NumViews = Data.NumInstances_NumViews & 0xFFU;
|
|
Output.NumInstances = Data.NumInstances_NumViews >> 8;
|
|
Output.BlockOffset = Data.BlockOffset;
|
|
Output.IndirectArgIndex = Data.IndirectArgIndex;
|
|
Output.SrcInstanceIdOffset = Data.SrcInstanceIdOffset;
|
|
Output.DestInstanceIdOffset = Data.DestInstanceIdOffset;
|
|
|
|
return Output;
|
|
} |