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a40b0454b36d86d32814f4c88413786a4f51659c
VoxelForge/Standalone/Source/StreamingWorld.h
T
Fr0zkaandClaude Opus 5.5 a40b0454b3 standalone: far-survival audit + LOD8 default with explicit far shells; neighbourhood-first viewer 
- FarSurvivalAudit: checks every stratum top/bottom boundary (4x4 columns per far tile) and every
  in-view far connector (sections <=128 voxels, 4 radial rays) against the emitted mesh. Falsified:
  removing one tile's shell triangles -> 16 missing, 16 holes, exit 14. Passes at LOD6/7/8.
- Far connectors follow source radial crossings; strata patches emitted at LOD7/8. Default LOD8.
- Viewer: separate near ShapeWorld for the 27 player tiles, full world built on its own thread;
  27/27 tiles hash-identical to the direct build. W1/W8 60 hash fields equal; routes 5642/5642.
Cost, measured by me head to head (8 workers, cold, BelowNormal 0xFF00): LOD8 without the shells
1.17-1.25 s, LOD8 with the shells 1.80 s; payload 92.6 -> 276.7 MiB. The shells are far too
expensive, and the pipelined benchmark whole view is 2.92 s (shape compiled twice): both to fix.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ
2026-10-04 22:51:44 +02:00

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#pragma once
#include "WorldMesher.h"
#include "StandaloneShapeWorld.h"
#include <condition_variable>
#include <algorithm>
#include <array>
#include <bit>
#include <chrono>
#include <cstdint>
#include <cstring>
#include <fstream>
#include <unordered_set>
struct FStandaloneTileKeyHash
{
std::size_t operator()(const FVoxelTileKey& Key) const noexcept
{ return static_cast<std::size_t>(GetTypeHash(Key)); }
};
struct FStandaloneDesiredTileSet
{
std::vector<FVoxelTileKey> Tiles;
FIntVector CenterChunk=FIntVector::ZeroValue;
int32 MinimumChunkZ=MIN_int32;
int32 MaximumChunkZ=MAX_int32;
int32 StrateTopChunkZ=0;
int32 StrateBottomChunkZ=0;
bool bHasStrate=false;
};
struct FStandaloneCpuTile
{
FVoxelTileKey Key;
uint64 RequestedCrossing=0;
std::vector<FStandaloneCpuVertex> Vertices;
std::vector<uint32> Indices;
uint64 DensitySamples=0;
double WorkerSeconds=0.0;
std::chrono::steady_clock::time_point CompletedAt{};
uint64 DensityHash=14695981039346656037ull;
bool bHasDensityHash=false;
uint64 MeshHash=14695981039346656037ull;
bool bHasMeshHash=false;
uint64 PayloadHash=14695981039346656037ull;
bool bHasPayloadHash=false;
uint64 TopologyHash=14695981039346656037ull;
bool bHasTopologyHash=false;
uint64 MeshPayloadAllocatedBytes=0;
std::array<uint64,VoxelDensityProfile::BucketCount> ProfileCycles{};
};
inline uint64 HashStandaloneMeshPayload(const FVoxelMeshData& Mesh)
{
uint64 Hash=14695981039346656037ull;
const auto AddWord=[&](uint64 Word,int32 Bytes)
{
for(int32 I=0;I<Bytes;++I)
{
Hash^=static_cast<uint8>(Word>>(I*8));
Hash*=1099511628211ull;
}
};
const auto AddDouble=[&](double Value)
{ AddWord(std::bit_cast<uint64>(Value),8); };
AddWord(static_cast<uint64>(Mesh.Vertices.Num()),8);
for(const FVector& Position:Mesh.Vertices)
{ AddDouble(Position.X);AddDouble(Position.Y);AddDouble(Position.Z); }
AddWord(static_cast<uint64>(Mesh.Normals.Num()),8);
for(const FVector& Normal:Mesh.Normals)
{ AddDouble(Normal.X);AddDouble(Normal.Y);AddDouble(Normal.Z); }
AddWord(static_cast<uint64>(Mesh.UVs.Num()),8);
for(const auto& UV:Mesh.UVs)
{ AddDouble(static_cast<double>(UV.X));AddDouble(static_cast<double>(UV.Y)); }
AddWord(static_cast<uint64>(Mesh.Colors.Num()),8);
for(const FColor& Color:Mesh.Colors)
{ AddWord(Color.R,1);AddWord(Color.G,1);AddWord(Color.B,1);AddWord(Color.A,1); }
AddWord(static_cast<uint64>(Mesh.Triangles.Num()),8);
for(const int32 Index:Mesh.Triangles)AddWord(static_cast<uint32>(Index),4);
AddWord(static_cast<uint32>(Mesh.NumSurfaceVertices),4);
AddWord(static_cast<uint32>(Mesh.NumSkirtTriangles),4);
AddWord(static_cast<uint32>(Mesh.NumCeilingTriangles),4);
return Hash;
}
inline uint64 HashStandaloneMeshTopology(const FVoxelMeshData& Mesh)
{
uint64 Hash=14695981039346656037ull;
const auto AddWord=[&](uint64 Word,int32 Bytes)
{
for(int32 I=0;I<Bytes;++I)
{
Hash^=static_cast<uint8>(Word>>(I*8));
Hash*=1099511628211ull;
}
};
using FTriangleKey=std::array<uint64,3>;
const auto VertexKey=[&](int32 Index)
{
uint64 VertexHash=14695981039346656037ull;
const auto AddVertexWord=[&](uint64 Word)
{
for(int32 Byte=0;Byte<8;++Byte)
{
VertexHash^=static_cast<uint8>(Word>>(Byte*8));
VertexHash*=1099511628211ull;
}
};
if(Index<0||Index>=Mesh.Vertices.Num()||Index>=Mesh.Normals.Num())
{ AddVertexWord(UINT64_MAX);return VertexHash; }
const FVector& Position=Mesh.Vertices[Index];
const FVector& Normal=Mesh.Normals[Index];
AddVertexWord(std::bit_cast<uint64>(static_cast<double>(Position.X)));
AddVertexWord(std::bit_cast<uint64>(static_cast<double>(Position.Y)));
AddVertexWord(std::bit_cast<uint64>(static_cast<double>(Position.Z)));
AddVertexWord(std::bit_cast<uint64>(static_cast<double>(Normal.X)));
AddVertexWord(std::bit_cast<uint64>(static_cast<double>(Normal.Y)));
AddVertexWord(std::bit_cast<uint64>(static_cast<double>(Normal.Z)));
return VertexHash;
};
std::vector<FTriangleKey> Triangles;
Triangles.reserve(static_cast<size_t>(Mesh.Triangles.Num()/3));
for(int32 I=0;I+2<Mesh.Triangles.Num();I+=3)
Triangles.push_back({VertexKey(Mesh.Triangles[I]),
VertexKey(Mesh.Triangles[I+1]),VertexKey(Mesh.Triangles[I+2])});
std::sort(Triangles.begin(),Triangles.end());
AddWord(static_cast<uint64>(Triangles.size()),8);
for(const FTriangleKey& Triangle:Triangles)
for(const uint64 VertexHash:Triangle)AddWord(VertexHash,8);
return Hash;
}
inline uint64 HashStandaloneCpuTileMesh(const FStandaloneCpuTile& Tile)
{
uint64 Hash=14695981039346656037ull;
const auto AddWord=[&](uint64 Word,int32 Bytes)
{
for(int32 I=0;I<Bytes;++I)
{
Hash^=static_cast<uint8>(Word>>(I*8));
Hash*=1099511628211ull;
}
};
AddWord(Tile.Vertices.size(),8);
for(const FStandaloneCpuVertex& Vertex:Tile.Vertices)
{
for(const float Value:Vertex.Position)AddWord(std::bit_cast<uint32>(Value),4);
for(const float Value:Vertex.Normal)AddWord(std::bit_cast<uint32>(Value),4);
}
AddWord(Tile.Indices.size(),8);
for(const uint32 Index:Tile.Indices)AddWord(Index,4);
return Hash;
}
inline double FindFarConnectorSurfaceRadius(const FStandaloneShapeWorld& Shape,const FVector& Center,
const FVector& Direction,double PreferredRadius)
{
const double SearchLength=PreferredRadius*2.0+32.0;
const double AcceptBand=std::max(16.0,PreferredRadius*0.75);
constexpr double Stride=8.0;
double PreviousDistance=0.0;
bool PreviousSolid=Shape.DensityAt(static_cast<float>(Center.X),static_cast<float>(Center.Y),
static_cast<float>(Center.Z))<0.0f;
double BestRadius=PreferredRadius,BestDifference=std::numeric_limits<double>::infinity();
for(double Distance=Stride;Distance<=SearchLength+1.0e-6;Distance=std::min(Distance+Stride,SearchLength))
{
const FVector P=Center+Direction*Distance;
const bool Solid=Shape.DensityAt(static_cast<float>(P.X),static_cast<float>(P.Y),
static_cast<float>(P.Z))<0.0f;
if(Solid!=PreviousSolid)
{
double Lo=PreviousDistance,Hi=Distance;
for(int32 I=0;I<6;++I)
{
const double Mid=(Lo+Hi)*0.5;
const FVector M=Center+Direction*Mid;
const bool MidSolid=Shape.DensityAt(static_cast<float>(M.X),static_cast<float>(M.Y),
static_cast<float>(M.Z))<0.0f;
if(MidSolid==PreviousSolid)Lo=Mid;else Hi=Mid;
}
const double Crossing=(Lo+Hi)*0.5;
const double Difference=std::abs(Crossing-PreferredRadius);
if(Difference<=AcceptBand&&Difference<BestDifference)
{BestRadius=Crossing;BestDifference=Difference;}
}
if(Distance>=SearchLength-1.0e-6)break;
PreviousDistance=Distance;PreviousSolid=Solid;
}
return BestRadius;
}
inline void AppendFarConnectorShells(const FStandaloneShapeWorld& Shape,const FVoxelTileKey& Key,
int32 Step,FVoxelMeshData& Mesh)
{
if(Key.Level<6||Step<=0)return;
constexpr int32 SideCount=8;
const FIntVector TileOrigin=Key.OriginVoxels();
const int32 TileExtent=Key.ExtentVoxels();
std::vector<FVector> NewVertices;
std::vector<FVector> NewNormals;
std::vector<FVector2f> NewUVs;
std::vector<FColor> NewColors;
std::vector<int32> NewTriangles;
const int32 OldVertexCount=Mesh.Vertices.Num();
const bool bHasUVs=Mesh.UVs.Num()==OldVertexCount;
const bool bHasColors=Mesh.Colors.Num()==OldVertexCount;
const FColor Color=bHasColors&&OldVertexCount>0?Mesh.Colors[0]:FColor(160,160,160,255);
for(const auto& Connector:Shape.GetFarConnectorSegments())
{
const FVector Delta=Connector.End-Connector.Start;
const double Length=std::sqrt(Delta.X*Delta.X+Delta.Y*Delta.Y+Delta.Z*Delta.Z);
if(Length<=1.0e-6)continue;
const double Starts[3]={Connector.Start.X,Connector.Start.Y,Connector.Start.Z};
const double Deltas[3]={Delta.X,Delta.Y,Delta.Z};
const double Low[3]={TileOrigin.X-Connector.Radius,TileOrigin.Y-Connector.Radius,
TileOrigin.Z-Connector.Radius};
const double High[3]={TileOrigin.X+TileExtent+Connector.Radius,
TileOrigin.Y+TileExtent+Connector.Radius,TileOrigin.Z+TileExtent+Connector.Radius};
double TMin=0.0,TMax=1.0;bool bIntersects=true;
for(int32 AxisIndex=0;AxisIndex<3;++AxisIndex)
{
if(std::abs(Deltas[AxisIndex])<1.0e-9)
{if(Starts[AxisIndex]<Low[AxisIndex]||Starts[AxisIndex]>High[AxisIndex])bIntersects=false;continue;}
double A=(Low[AxisIndex]-Starts[AxisIndex])/Deltas[AxisIndex];
double B=(High[AxisIndex]-Starts[AxisIndex])/Deltas[AxisIndex];
if(A>B)std::swap(A,B);
TMin=std::max(TMin,A);TMax=std::min(TMax,B);
if(TMin>TMax){bIntersects=false;break;}
}
if(!bIntersects||TMax-TMin<1.0e-6)continue;
const FVector Axis=Delta/Length;
FVector U=FVector::CrossProduct(Axis,FVector::UpVector);
if(U.SizeSquared()<0.01)U=FVector::CrossProduct(Axis,FVector::RightVector);
U.Normalize();
FVector V=FVector::CrossProduct(Axis,U);V.Normalize();
const int32 AxialSampleCount=std::max(1,static_cast<int32>(std::ceil(Length/128.0)));
std::vector<double> RingParameters{TMin};
for(int32 Sample=0;Sample<AxialSampleCount;++Sample)
{
const double T=(static_cast<double>(Sample)+0.5)/AxialSampleCount;
if(T>TMin+1.0e-6&&T<TMax-1.0e-6)RingParameters.push_back(T);
}
RingParameters.push_back(TMax);
const int32 RingCount=static_cast<int32>(RingParameters.size())-1;
const int32 VertexBase=static_cast<int32>(NewVertices.size());
for(int32 Ring=0;Ring<=RingCount;++Ring)
{
const double T=RingParameters[static_cast<size_t>(Ring)];
const FVector Center=Connector.Start+Delta*T;
for(int32 Side=0;Side<SideCount;++Side)
{
const double Angle=2.0*PI*Side/SideCount;
FVector Radial=U*std::cos(Angle)+V*std::sin(Angle);Radial.Normalize();
const double SourceRadius=FindFarConnectorSurfaceRadius(Shape,Center,Radial,
Connector.Radius);
const FVector P=Center+Radial*SourceRadius;
NewVertices.emplace_back(P.X*25.0,P.Y*25.0,P.Z*25.0);
NewNormals.emplace_back(-Radial.X,-Radial.Y,-Radial.Z);
if(bHasUVs)NewUVs.emplace_back(static_cast<float>(T*Length/256.0),
static_cast<float>(Side)/SideCount);
if(bHasColors)NewColors.push_back(Color);
}
}
for(int32 Ring=0;Ring<RingCount;++Ring)
for(int32 Side=0;Side<SideCount;++Side)
{
const int32 Next=(Side+1)%SideCount;
const int32 A=VertexBase+Ring*SideCount+Side;
const int32 B=VertexBase+Ring*SideCount+Next;
const int32 C=VertexBase+(Ring+1)*SideCount+Side;
const int32 D=VertexBase+(Ring+1)*SideCount+Next;
// The far links are carved passages, so their visible normals face inward.
NewTriangles.insert(NewTriangles.end(),{A,C,B,B,C,D});
}
}
if(NewVertices.empty()||NewTriangles.empty())return;
const int32 OldSurfaceVertices=std::clamp(Mesh.NumSurfaceVertices,0,OldVertexCount);
const int32 AddedVertices=static_cast<int32>(NewVertices.size());
auto InsertVertices=[&](auto& Existing,const auto& Added)
{
using TArrayType=std::remove_reference_t<decltype(Existing)>;
TArrayType Combined;Combined.Reserve(Existing.Num()+static_cast<int32>(Added.size()));
for(int32 I=0;I<OldSurfaceVertices;++I)Combined.Add(Existing[I]);
for(const auto& Value:Added)Combined.Add(Value);
for(int32 I=OldSurfaceVertices;I<Existing.Num();++I)Combined.Add(Existing[I]);
Existing=std::move(Combined);
};
InsertVertices(Mesh.Vertices,NewVertices);
InsertVertices(Mesh.Normals,NewNormals);
if(bHasUVs)InsertVertices(Mesh.UVs,NewUVs);
if(bHasColors)InsertVertices(Mesh.Colors,NewColors);
for(int32& Index:Mesh.Triangles)if(Index>=OldSurfaceVertices)Index+=AddedVertices;
const int32 CeilingStart=std::max(0,Mesh.Triangles.Num()-Mesh.NumCeilingTriangles*3);
TArray<int32> CombinedTriangles;CombinedTriangles.Reserve(Mesh.Triangles.Num()+static_cast<int32>(NewTriangles.size()));
for(int32 I=0;I<CeilingStart;++I)CombinedTriangles.Add(Mesh.Triangles[I]);
for(const int32 Index:NewTriangles)CombinedTriangles.Add(OldSurfaceVertices+Index);
for(int32 I=CeilingStart;I<Mesh.Triangles.Num();++I)CombinedTriangles.Add(Mesh.Triangles[I]);
Mesh.Triangles=std::move(CombinedTriangles);
Mesh.NumSurfaceVertices=OldSurfaceVertices+AddedVertices;
}
inline void AppendFarStratumShells(const FStandaloneOwnerWorld& World,const FStandaloneShapeWorld& Shape,
const FVoxelTileKey& Key,int32 Step,FVoxelMeshData& Mesh)
{
if(Key.Level<7||Step<4||!World.Manager)return;
FStandaloneShapeWorld::FScopedForcedFarAirSamples SourceFieldScope(nullptr);
struct FBoundary { double Z=0.0,HalfWidth=8.0; };
const auto& Layout=World.Manager->GetLayout();
std::vector<FBoundary> Boundaries;
for(const FStrateSlot& Slot:Layout)
{
const FStrateGenerationParams Params=World.Manager->GetGenerationParams(
FIntVector(0,0,(Slot.TopChunkZ+Slot.BottomChunkZ)/2));
const double HalfWidth=std::max(8.0,static_cast<double>(Params.BoundarySealThickness)+8.0);
Boundaries.push_back({static_cast<double>(Slot.BottomChunkZ)*CHUNK_SIZE,HalfWidth});
Boundaries.push_back({static_cast<double>(Slot.TopChunkZ+1)*CHUNK_SIZE,HalfWidth});
}
std::sort(Boundaries.begin(),Boundaries.end(),[](const FBoundary& A,const FBoundary& B){return A.Z<B.Z;});
Boundaries.erase(std::unique(Boundaries.begin(),Boundaries.end(),[](const FBoundary& A,const FBoundary& B)
{return std::abs(A.Z-B.Z)<0.01;}),Boundaries.end());
const FIntVector Origin=Key.OriginVoxels();const int32 Extent=Key.ExtentVoxels();
const int32 FineStep=std::max(1,Step/2);const int32 GridCells=Extent/FineStep;
if(GridCells<=0||GridCells>256)return;
struct FNode { double Z=0.0;FVector Normal{};int32 Index=INDEX_NONE;bool bValid=false,bBelowSolid=false; };
std::vector<FVector> NewVertices,NewNormals;
std::vector<FVector2f> NewUVs;std::vector<FColor> NewColors;
std::vector<int32> NewTriangles;
const int32 OldVertexCount=Mesh.Vertices.Num();
const bool bHasUVs=Mesh.UVs.Num()==OldVertexCount;
const bool bHasColors=Mesh.Colors.Num()==OldVertexCount;
const FColor Color=bHasColors&&OldVertexCount>0?Mesh.Colors[0]:FColor(160,160,160,255);
const auto Density=[&](double X,double Y,double Z)
{return Shape.DensityAt(static_cast<float>(X),static_cast<float>(Y),static_cast<float>(Z));};
for(const FBoundary& Boundary:Boundaries)
{
if(Boundary.Z+Boundary.HalfWidth<Origin.Z||Boundary.Z-Boundary.HalfWidth>Origin.Z+Extent)continue;
const int32 ZMin=std::max(Origin.Z,static_cast<int32>(std::floor(Boundary.Z-Boundary.HalfWidth)));
const int32 ZMax=std::min(Origin.Z+Extent,static_cast<int32>(std::ceil(Boundary.Z+Boundary.HalfWidth)));
std::vector<FNode> Nodes(static_cast<size_t>(GridCells+1)*(GridCells+1));
for(int32 YI=0;YI<=GridCells;++YI)for(int32 XI=0;XI<=GridCells;++XI)
{
const double X=Origin.X+XI*FineStep,Y=Origin.Y+YI*FineStep;
int32 PreviousZ=ZMin;bool PreviousSolid=Density(X,Y,PreviousZ)<0.0f;
FNode& Node=Nodes[static_cast<size_t>(YI)*(GridCells+1)+XI];
for(int32 Z=ZMin+1;Z<=ZMax;++Z)
{
const bool Solid=Density(X,Y,Z)<0.0f;
if(Solid==PreviousSolid){PreviousZ=Z;PreviousSolid=Solid;continue;}
double Lo=PreviousZ,Hi=Z;
for(int32 I=0;I<8;++I)
{
const double Mid=(Lo+Hi)*0.5;
if((Density(X,Y,Mid)<0.0f)==PreviousSolid)Lo=Mid;else Hi=Mid;
}
Node.Z=(Lo+Hi)*0.5;Node.bBelowSolid=PreviousSolid;Node.bValid=true;
const float GX=Density(X+2,Y,Node.Z)-Density(X-2,Y,Node.Z);
const float GY=Density(X,Y+2,Node.Z)-Density(X,Y-2,Node.Z);
const float GZ=Density(X,Y,Node.Z+2)-Density(X,Y,Node.Z-2);
Node.Normal=FVector(GX,GY,GZ);
if(Node.Normal.SizeSquared()<1.0e-8)Node.Normal=FVector(0,0,PreviousSolid?1:-1);
Node.Normal.Normalize();break;
}
}
const auto EnsureVertex=[&](FNode& Node,int32 XI,int32 YI)
{
if(Node.Index!=INDEX_NONE)return Node.Index;
Node.Index=static_cast<int32>(NewVertices.size());
NewVertices.emplace_back((Origin.X+XI*FineStep)*25.0,(Origin.Y+YI*FineStep)*25.0,Node.Z*25.0);
NewNormals.push_back(Node.Normal);
if(bHasUVs)NewUVs.emplace_back(static_cast<float>(XI)*FineStep/256.0f,
static_cast<float>(YI)*FineStep/256.0f);
if(bHasColors)NewColors.push_back(Color);
return Node.Index;
};
for(int32 YI=0;YI<GridCells;++YI)for(int32 XI=0;XI<GridCells;++XI)
{
FNode* Corners[4]={&Nodes[static_cast<size_t>(YI)*(GridCells+1)+XI],
&Nodes[static_cast<size_t>(YI)*(GridCells+1)+XI+1],
&Nodes[static_cast<size_t>(YI+1)*(GridCells+1)+XI+1],
&Nodes[static_cast<size_t>(YI+1)*(GridCells+1)+XI]};
int32 Valid[4],Count=0;
for(int32 I=0;I<4;++I)if(Corners[I]->bValid)Valid[Count++]=I;
if(Count<3)continue;
int32 Indices[4];
const int32 CornerXI[4]={XI,XI+1,XI+1,XI};
const int32 CornerYI[4]={YI,YI,YI+1,YI+1};
for(int32 I=0;I<Count;++I)
{
const int32 C=Valid[I];Indices[I]=EnsureVertex(*Corners[C],CornerXI[C],CornerYI[C]);
}
const bool bUp=Corners[Valid[0]]->bBelowSolid;
if(Count==4)
{
if(bUp)NewTriangles.insert(NewTriangles.end(),{Indices[0],Indices[1],Indices[3],Indices[1],Indices[2],Indices[3]});
else NewTriangles.insert(NewTriangles.end(),{Indices[0],Indices[3],Indices[1],Indices[1],Indices[3],Indices[2]});
}
else if(bUp)NewTriangles.insert(NewTriangles.end(),{Indices[0],Indices[1],Indices[2]});
else NewTriangles.insert(NewTriangles.end(),{Indices[0],Indices[2],Indices[1]});
}
}
if(NewVertices.empty()||NewTriangles.empty())return;
const int32 OldSurfaceVertices=std::clamp(Mesh.NumSurfaceVertices,0,OldVertexCount);
const int32 AddedVertices=static_cast<int32>(NewVertices.size());
auto InsertVertices=[&](auto& Existing,const auto& Added)
{
using TArrayType=std::remove_reference_t<decltype(Existing)>;
TArrayType Combined;Combined.Reserve(Existing.Num()+static_cast<int32>(Added.size()));
for(int32 I=0;I<OldSurfaceVertices;++I)Combined.Add(Existing[I]);
for(const auto& Value:Added)Combined.Add(Value);
for(int32 I=OldSurfaceVertices;I<Existing.Num();++I)Combined.Add(Existing[I]);
Existing=std::move(Combined);
};
InsertVertices(Mesh.Vertices,NewVertices);InsertVertices(Mesh.Normals,NewNormals);
if(bHasUVs)InsertVertices(Mesh.UVs,NewUVs);
if(bHasColors)InsertVertices(Mesh.Colors,NewColors);
for(int32& Index:Mesh.Triangles)if(Index>=OldSurfaceVertices)Index+=AddedVertices;
const int32 CeilingStart=std::max(0,Mesh.Triangles.Num()-Mesh.NumCeilingTriangles*3);
TArray<int32> CombinedTriangles;CombinedTriangles.Reserve(Mesh.Triangles.Num()+static_cast<int32>(NewTriangles.size()));
for(int32 I=0;I<CeilingStart;++I)CombinedTriangles.Add(Mesh.Triangles[I]);
for(const int32 Index:NewTriangles)CombinedTriangles.Add(OldSurfaceVertices+Index);
for(int32 I=CeilingStart;I<Mesh.Triangles.Num();++I)CombinedTriangles.Add(Mesh.Triangles[I]);
Mesh.Triangles=std::move(CombinedTriangles);Mesh.NumSurfaceVertices=OldSurfaceVertices+AddedVertices;
}
struct FStandaloneMeshCacheMetadata
{
uint64 SourceDataHash=0;
int32 Seed=0;
int32 ClipRadius=3;
int32 FullResClipLevels=2;
int32 CoarseTileCells=16;
int32 StrateContentCutMinLevel=9;
int32 SkirtCells=0;
int32 LODOctaveDrop=0;
int32 bGenerateSkirts=0;
uint32 AlgorithmVersion=1;
uint32 TunnelMode=0;
uint32 VoxelSizeCm=25;
};
class FStandaloneMeshCache
{
public:
static constexpr uint32 CurrentVersion=1;
void Clear(){Tiles.clear();bLoaded=false;BytesLoaded=0;}
bool IsLoaded()const{return bLoaded;}
size_t Num()const{return Tiles.size();}
uint64 GetBytesLoaded()const{return BytesLoaded;}
const FStandaloneCpuTile* Find(const FVoxelTileKey& Key)const
{
const auto It=Tiles.find(Key);
return It==Tiles.end()?nullptr:&It->second;
}
static bool Save(const std::string& Path,const FStandaloneMeshCacheMetadata& Metadata,
std::vector<FStandaloneCpuTile>& InTiles,std::string& Error)
{
std::vector<FStandaloneCpuTile*> Ordered;
Ordered.reserve(InTiles.size());
for(FStandaloneCpuTile& Tile:InTiles)Ordered.push_back(&Tile);
std::sort(Ordered.begin(),Ordered.end(),[](const FStandaloneCpuTile* A,const FStandaloneCpuTile* B)
{
if(A->Key.Level!=B->Key.Level)return A->Key.Level<B->Key.Level;
if(A->Key.Coord.Z!=B->Key.Coord.Z)return A->Key.Coord.Z<B->Key.Coord.Z;
if(A->Key.Coord.Y!=B->Key.Coord.Y)return A->Key.Coord.Y<B->Key.Coord.Y;
return A->Key.Coord.X<B->Key.Coord.X;
});
std::ofstream File(Path,std::ios::binary|std::ios::trunc);
if(!File){Error="could not open mesh cache for writing: "+Path;return false;}
struct FHeader
{
char Magic[8];uint32 Version;uint32 Endian;uint64 SourceDataHash;
int32 Seed,ClipRadius,FullResClipLevels,CoarseTileCells,StrateContentCutMinLevel;
int32 SkirtCells,LODOctaveDrop,bGenerateSkirts;
uint32 AlgorithmVersion,TunnelMode,VoxelSizeCm;
uint64 TileCount;
};
static_assert(sizeof(FHeader)==80);
const FHeader Header{{'V','F','M','E','S','H','1','\0'},1,0x01020304u,
Metadata.SourceDataHash,Metadata.Seed,Metadata.ClipRadius,Metadata.FullResClipLevels,
Metadata.CoarseTileCells,Metadata.StrateContentCutMinLevel,Metadata.SkirtCells,
Metadata.LODOctaveDrop,Metadata.bGenerateSkirts,Metadata.AlgorithmVersion,
Metadata.TunnelMode,Metadata.VoxelSizeCm,static_cast<uint64>(Ordered.size())};
File.write(reinterpret_cast<const char*>(&Header),sizeof(Header));
struct FRecord
{
int32 Level,X,Y,Z;uint64 Samples,DensityHash;uint32 VertexCount,IndexCount;
};
static_assert(sizeof(FRecord)==40);
for(const FStandaloneCpuTile* Tile:Ordered)
{
if(Tile->Vertices.size()>UINT32_MAX||Tile->Indices.size()>UINT32_MAX
||Tile->Indices.size()%3!=0)
{Error="mesh cache tile exceeds the 32-bit record limits";return false;}
const FRecord Record{Tile->Key.Level,Tile->Key.Coord.X,Tile->Key.Coord.Y,
Tile->Key.Coord.Z,Tile->DensitySamples,Tile->DensityHash,
static_cast<uint32>(Tile->Vertices.size()),static_cast<uint32>(Tile->Indices.size())};
File.write(reinterpret_cast<const char*>(&Record),sizeof(Record));
if(!Tile->Vertices.empty())File.write(reinterpret_cast<const char*>(Tile->Vertices.data()),
static_cast<std::streamsize>(Tile->Vertices.size()*sizeof(FStandaloneCpuVertex)));
if(!Tile->Indices.empty())File.write(reinterpret_cast<const char*>(Tile->Indices.data()),
static_cast<std::streamsize>(Tile->Indices.size()*sizeof(uint32)));
if(!File){Error="mesh cache write failed: "+Path;return false;}
}
File.flush();
if(!File){Error="mesh cache flush failed: "+Path;return false;}
return true;
}
bool Load(const std::string& Path,const FStandaloneMeshCacheMetadata& Expected,std::string& Error)
{
Clear();
std::ifstream File(Path,std::ios::binary);
if(!File){Error="cache file is missing or unreadable";return false;}
struct FHeader
{
char Magic[8];uint32 Version;uint32 Endian;uint64 SourceDataHash;
int32 Seed,ClipRadius,FullResClipLevels,CoarseTileCells,StrateContentCutMinLevel;
int32 SkirtCells,LODOctaveDrop,bGenerateSkirts;
uint32 AlgorithmVersion,TunnelMode,VoxelSizeCm;
uint64 TileCount;
};
static_assert(sizeof(FHeader)==80);
FHeader H{};File.read(reinterpret_cast<char*>(&H),sizeof(H));
const char ExpectedMagic[8]={'V','F','M','E','S','H','1','\0'};
if(!File||std::memcmp(H.Magic,ExpectedMagic,sizeof(ExpectedMagic))!=0
||H.Version!=1||H.Endian!=0x01020304u||H.TileCount>1000000)
{Error="mesh cache header is invalid";return false;}
if(H.SourceDataHash!=Expected.SourceDataHash||H.Seed!=Expected.Seed
||H.ClipRadius!=Expected.ClipRadius||H.FullResClipLevels!=Expected.FullResClipLevels
||H.CoarseTileCells!=Expected.CoarseTileCells
||H.StrateContentCutMinLevel!=Expected.StrateContentCutMinLevel
||H.SkirtCells!=Expected.SkirtCells||H.LODOctaveDrop!=Expected.LODOctaveDrop
||H.bGenerateSkirts!=Expected.bGenerateSkirts
||H.AlgorithmVersion!=Expected.AlgorithmVersion||H.TunnelMode!=Expected.TunnelMode
||H.VoxelSizeCm!=Expected.VoxelSizeCm)
{Error="mesh cache metadata does not match this world configuration";return false;}
struct FRecord
{
int32 Level,X,Y,Z;uint64 Samples,DensityHash;uint32 VertexCount,IndexCount;
};
static_assert(sizeof(FRecord)==40);
std::unordered_map<FVoxelTileKey,FStandaloneCpuTile,FStandaloneTileKeyHash> Loaded;
Loaded.reserve(static_cast<size_t>(H.TileCount)*2+1);
for(uint64 I=0;I<H.TileCount;++I)
{
FRecord Record{};File.read(reinterpret_cast<char*>(&Record),sizeof(Record));
if(!File||Record.Level<0||Record.Level>8||Record.VertexCount>10000000
||Record.IndexCount>60000000)
{Error="mesh cache contains an invalid tile record";return false;}
FStandaloneCpuTile Tile;Tile.Key=FVoxelTileKey(FIntVector(Record.X,Record.Y,Record.Z),Record.Level);
Tile.DensitySamples=Record.Samples;Tile.DensityHash=Record.DensityHash;Tile.bHasDensityHash=true;
Tile.Vertices.resize(Record.VertexCount);Tile.Indices.resize(Record.IndexCount);
if(!Tile.Vertices.empty())File.read(reinterpret_cast<char*>(Tile.Vertices.data()),
static_cast<std::streamsize>(Tile.Vertices.size()*sizeof(FStandaloneCpuVertex)));
if(!Tile.Indices.empty())File.read(reinterpret_cast<char*>(Tile.Indices.data()),
static_cast<std::streamsize>(Tile.Indices.size()*sizeof(uint32)));
if(!File){Error="mesh cache ended inside tile geometry";return false;}
for(const uint32 Index:Tile.Indices)
if(Index>=Tile.Vertices.size())
{Error="mesh cache contains an out-of-range mesh index";return false;}
for(const FStandaloneCpuVertex& Vertex:Tile.Vertices)
for(const float Value:Vertex.Position)
if(!std::isfinite(Value))
{Error="mesh cache contains a non-finite vertex";return false;}
for(const FStandaloneCpuVertex& Vertex:Tile.Vertices)
for(const float Value:Vertex.Normal)
if(!std::isfinite(Value))
{Error="mesh cache contains a non-finite normal";return false;}
if(!Loaded.emplace(Tile.Key,std::move(Tile)).second)
{Error="mesh cache contains duplicate tile keys";return false;}
}
const std::streamoff End=File.tellg();
if(End<0){Error="could not determine mesh cache size";return false;}
BytesLoaded=static_cast<uint64>(End);Tiles.swap(Loaded);bLoaded=true;
return true;
}
private:
std::unordered_map<FVoxelTileKey,FStandaloneCpuTile,FStandaloneTileKeyHash> Tiles;
bool bLoaded=false;
uint64 BytesLoaded=0;
};
struct FStandaloneStreamingUpdate
{
FIntVector CenterChunk=FIntVector::ZeroValue;
int32 DesiredTiles=0;
int32 RetainedResidentTiles=0;
int32 NewJobs=0;
int32 CancelledQueuedJobs=0;
int32 FullResTiles=0;
std::vector<std::pair<uint64,uint64>> CancelledByCrossing;
};
struct FStandaloneTileJob
{
FVoxelTileKey Key;
int32 BandZMin=MIN_int32;
int32 BandZMax=MAX_int32;
uint64 RequestedCrossing=0;
double PriorityDistanceSquared=0.0;
};
struct FStandaloneTileJobHeapOrder
{
bool operator()(const FStandaloneTileJob& A,const FStandaloneTileJob& B)const
{
if(A.PriorityDistanceSquared!=B.PriorityDistanceSquared)
return A.PriorityDistanceSquared>B.PriorityDistanceSquared;
if(A.Key.Level!=B.Key.Level)return A.Key.Level>B.Key.Level;
if(A.Key.Coord.Z!=B.Key.Coord.Z)return A.Key.Coord.Z>B.Key.Coord.Z;
if(A.Key.Coord.Y!=B.Key.Coord.Y)return A.Key.Coord.Y>B.Key.Coord.Y;
return A.Key.Coord.X>B.Key.Coord.X;
}
};
namespace StandaloneWorldMesher
{
inline double TileDistanceSquaredChunks(const FVoxelTileKey& Tile,const FIntVector& Center)
{
const double Scale=static_cast<double>(1<<Tile.Level);
const double DX=(static_cast<double>(Tile.Coord.X)+0.5)*Scale-Center.X;
const double DY=(static_cast<double>(Tile.Coord.Y)+0.5)*Scale-Center.Y;
const double DZ=(static_cast<double>(Tile.Coord.Z)+0.5)*Scale-Center.Z;
return DX*DX+DY*DY+DZ*DZ;
}
inline FStandaloneDesiredTileSet BuildDesiredSet(
const FStandaloneOwnerWorld& World,const FVector& CameraPositionVoxels)
{
FStandaloneDesiredTileSet Desired;
Desired.CenterChunk=CameraChunk(CameraPositionVoxels);
if(World.Settings->bClampViewToStrate)
Desired.bHasStrate=World.Manager->GetStrateChunkZBounds(
Desired.CenterChunk.Z,Desired.StrateTopChunkZ,Desired.StrateBottomChunkZ);
VoxelClipmapDesiredTiles::ResolveVerticalBounds(
Desired.CenterChunk.Z,World.Settings->ViewDistanceUp,World.Settings->ViewDistanceDown,
World.Settings->StrateViewMarginChunks,World.Settings->bClampViewToStrate,
Desired.bHasStrate,Desired.StrateTopChunkZ,Desired.StrateBottomChunkZ,
Desired.MinimumChunkZ,Desired.MaximumChunkZ);
VoxelClipmapDesiredTiles::FParameters Parameters;
Parameters.ClipRadius=World.ClipRadius;
Parameters.MaxClipLevel=FMath::Clamp(World.MaxClipLevel,0,8);
Parameters.RenderDistanceChunks=World.RenderDistanceChunks;
TArray<FVoxelTileKey> Tiles;
VoxelClipmapDesiredTiles::Build(Desired.CenterChunk,Desired.MinimumChunkZ,
Desired.MaximumChunkZ,Parameters,Tiles);
Desired.Tiles.reserve(static_cast<size_t>(Tiles.Num()));
for(const FVoxelTileKey& Tile:Tiles)Desired.Tiles.push_back(Tile);
std::sort(Desired.Tiles.begin(),Desired.Tiles.end(),[&](const FVoxelTileKey& A,const FVoxelTileKey& B)
{
const double DA=TileDistanceSquaredChunks(A,Desired.CenterChunk);
const double DB=TileDistanceSquaredChunks(B,Desired.CenterChunk);
return DA==DB?A.Level<B.Level:DA<DB;
});
return Desired;
}
}
class FStandaloneStreamingGenerator
{
public:
explicit FStandaloneStreamingGenerator(FStandaloneOwnerWorld& InWorld,int32 InWorkerCount=8,
bool bInHashDensity=false,
const FStandaloneMeshCache* InMeshCache=nullptr,
int32 InMaxLevelFilter=-1,
bool bInSkipUvAndColors=false,
bool bInSkipMaterialGroups=false,
bool bInSkipUV=false,
bool bInSkipColors=false)
:World(&InWorld),WorkerCount(FMath::Clamp(InWorkerCount,1,16)),bHashDensity(bInHashDensity),
MeshCache(InMeshCache),MaxLevelFilter(InMaxLevelFilter),
bSkipUvAndColors(bInSkipUvAndColors),bSkipMaterialGroups(bInSkipMaterialGroups),
bSkipUV(bInSkipUV),bSkipColors(bInSkipColors)
{
VoxelGenLOD::InitializeConsoleSwitches();
UVoxelMarchingCubesMesher::InitializeConsoleSwitches();
}
FStandaloneStreamingGenerator(const FStandaloneStreamingGenerator&)=delete;
FStandaloneStreamingGenerator& operator=(const FStandaloneStreamingGenerator&)=delete;
~FStandaloneStreamingGenerator(){Stop();}
FStandaloneStreamingUpdate Start(const FVector& CameraPositionVoxels,
const std::vector<FVoxelTileKey>& ResidentKeys={},
uint64 CrossingIndex=0)
{
Stop();
{
std::lock_guard<std::mutex> Lock(Mutex);
bStop=false;
}
for(int32 I=0;I<WorkerCount;++I)Workers.emplace_back([this](){WorkerLoop();});
return UpdateDesired(CameraPositionVoxels,ResidentKeys,CrossingIndex);
}
void SetDesiredTileFilter(const std::vector<FVoxelTileKey>& Keys)
{
TileFilter.clear();TileFilter.reserve(Keys.size()*2+1);
for(const FVoxelTileKey& Key:Keys)TileFilter.insert(Key);
bUseTileFilter=true;
}
void Stop()
{
{
std::lock_guard<std::mutex> Lock(Mutex);
bStop=true;
Queue.clear();
}
Wake.notify_all();
for(std::thread& Worker:Workers)if(Worker.joinable())Worker.join();
Workers.clear();
std::lock_guard<std::mutex> Lock(Mutex);
Ready.clear();Outstanding.clear();Desired.clear();
}
FStandaloneStreamingUpdate UpdateDesired(
const FVector& CameraPositionVoxels,const std::vector<FVoxelTileKey>& ResidentKeys,
uint64 CrossingIndex=0)
{
FStandaloneDesiredTileSet NewDesired=StandaloneWorldMesher::BuildDesiredSet(*World,CameraPositionVoxels);
if(MaxLevelFilter>=0)
NewDesired.Tiles.erase(std::remove_if(NewDesired.Tiles.begin(),NewDesired.Tiles.end(),
[&](const FVoxelTileKey& Key){return Key.Level>MaxLevelFilter;}),NewDesired.Tiles.end());
if(bUseTileFilter)
NewDesired.Tiles.erase(std::remove_if(NewDesired.Tiles.begin(),NewDesired.Tiles.end(),
[&](const FVoxelTileKey& Key){return !TileFilter.contains(Key);}),NewDesired.Tiles.end());
FStandaloneStreamingUpdate Stats;
Stats.CenterChunk=NewDesired.CenterChunk;
Stats.DesiredTiles=static_cast<int32>(NewDesired.Tiles.size());
std::unordered_set<FVoxelTileKey,FStandaloneTileKeyHash> Resident;
Resident.reserve(ResidentKeys.size()*2+1);
for(const FVoxelTileKey& Key:ResidentKeys)Resident.insert(Key);
for(const FVoxelTileKey& Key:NewDesired.Tiles)
{
if(Key.Level<World->FullResClipLevels)++Stats.FullResTiles;
if(Resident.contains(Key))++Stats.RetainedResidentTiles;
}
std::lock_guard<std::mutex> Lock(Mutex);
Desired.clear();Desired.reserve(NewDesired.Tiles.size()*2+1);
for(const FVoxelTileKey& Key:NewDesired.Tiles)Desired.insert(Key);
FullResTileCount=Stats.FullResTiles;
std::unordered_map<uint64,uint64> CancelledByCrossing;
auto QueueEnd=std::remove_if(Queue.begin(),Queue.end(),[&](const FStandaloneTileJob& Job)
{
if(Desired.contains(Job.Key))return false;
Outstanding.erase(Job.Key);++Stats.CancelledQueuedJobs;
++CancelledByCrossing[Job.RequestedCrossing];return true;
});
Queue.erase(QueueEnd,Queue.end());
Stats.CancelledByCrossing.reserve(CancelledByCrossing.size());
for(const auto& Pair:CancelledByCrossing)Stats.CancelledByCrossing.push_back(Pair);
for(FStandaloneTileJob& Job:Queue)
Job.PriorityDistanceSquared=StandaloneWorldMesher::TileDistanceSquaredChunks(
Job.Key,NewDesired.CenterChunk);
const int32 BandMin=World->StrateContentCutMinLevel<9&&NewDesired.bHasStrate
? NewDesired.StrateBottomChunkZ*CHUNK_SIZE:MIN_int32;
const int32 BandMax=World->StrateContentCutMinLevel<9&&NewDesired.bHasStrate
? (NewDesired.StrateTopChunkZ+1)*CHUNK_SIZE:MAX_int32;
for(const FVoxelTileKey& Key:NewDesired.Tiles)
{
if(Resident.contains(Key)||Outstanding.contains(Key))continue;
Queue.push_back({Key,BandMin,BandMax,CrossingIndex,
StandaloneWorldMesher::TileDistanceSquaredChunks(Key,NewDesired.CenterChunk)});
Outstanding.insert(Key);++Stats.NewJobs;
}
CurrentDesired=std::move(NewDesired);
std::make_heap(Queue.begin(),Queue.end(),FStandaloneTileJobHeapOrder{});
Wake.notify_all();
return Stats;
}
std::vector<FStandaloneCpuTile> TakeReady()
{
std::vector<FStandaloneCpuTile> Out;
std::lock_guard<std::mutex> Lock(Mutex);
Out.swap(Ready);
for(const FStandaloneCpuTile& Tile:Out)Outstanding.erase(Tile.Key);
return Out;
}
bool IsDesired(const FVoxelTileKey& Key)const
{std::lock_guard<std::mutex> Lock(Mutex);return Desired.contains(Key);}
int32 DesiredCount()const
{std::lock_guard<std::mutex> Lock(Mutex);return static_cast<int32>(Desired.size());}
int32 FullResDesiredCount()const
{std::lock_guard<std::mutex> Lock(Mutex);return FullResTileCount;}
FIntVector CenterChunk()const
{std::lock_guard<std::mutex> Lock(Mutex);return CurrentDesired.CenterChunk;}
int32 GetWorkerCount()const{return WorkerCount;}
uint64 GetCacheHits()const{return CacheHitCount.load(std::memory_order_relaxed);}
private:
FStandaloneCpuTile Generate(const FStandaloneTileJob& Job)
{
const auto StartTime=FClock::now();
FStandaloneCpuTile Out;Out.Key=Job.Key;Out.RequestedCrossing=Job.RequestedCrossing;
if(MeshCache)
{
if(const FStandaloneCpuTile* Cached=MeshCache->Find(Job.Key))
{
Out=*Cached;Out.RequestedCrossing=Job.RequestedCrossing;
Out.WorkerSeconds=std::chrono::duration<double>(FClock::now()-StartTime).count();
Out.CompletedAt=FClock::now();
if(bHashDensity)
{Out.MeshHash=HashStandaloneCpuTileMesh(Out);Out.bHasMeshHash=true;}
CacheHitCount.fetch_add(1,std::memory_order_relaxed);
return Out;
}
}
UVoxelMarchingCubesMesher Mesher;
Mesher.SetGenerator(World->Generator.get());
Mesher.bStandaloneSkipUvAndColors=bSkipUvAndColors;
Mesher.bStandaloneSkipUV=bSkipUV;
Mesher.bStandaloneSkipColors=bSkipColors;
Mesher.bStandaloneSkipMaterialGroups=bSkipMaterialGroups;
Mesher.bGenerateSkirts=World->bGenerateSkirts;
Mesher.SkirtCells=static_cast<float>(World->SkirtCells);
Mesher.LODOctaveDrop=World->LODOctaveDrop;
const int32 Level=Job.Key.Level;
const int32 Extent=Job.Key.ExtentVoxels();
const int32 Cells=Level<World->FullResClipLevels?CHUNK_SIZE:FMath::Max(1,World->CoarseTileCells);
const int32 Step=FMath::Max(1,Extent/Cells);
std::unordered_set<uint64> ForcedFarAirSamples;
const FStandaloneShapeWorld* Shape=FStandaloneShapeWorldAccess::GetActive();
if(Level>=6&&Shape&&Shape->HasFarWorld())
Shape->BuildFarConnectorAirSamples(Job.Key.OriginVoxels(),Step,Cells,ForcedFarAirSamples);
FStandaloneShapeWorld::FScopedForcedFarAirSamples ForcedSamplesScope(
ForcedFarAirSamples.empty()?nullptr:&ForcedFarAirSamples);
int64 SampleCount=0;
const bool bProfile=VoxelDensityProfile::GetMode()!=VoxelDensityProfile::EMode::Disabled;
const VoxelDensityProfile::FSnapshot Before=bProfile
? VoxelDensityProfile::SnapshotCurrentThread():VoxelDensityProfile::FSnapshot{};
std::vector<float> DensityValues;
FVoxelMeshData Mesh=Mesher.GenerateMesh(Job.Key.OriginVoxels(),Step,Cells,nullptr,
Job.BandZMin,Job.BandZMax,&SampleCount,nullptr,nullptr,
bHashDensity?&DensityValues:nullptr);
if(Shape&&Shape->HasFarWorld())
{
AppendFarConnectorShells(*Shape,Job.Key,Step,Mesh);
AppendFarStratumShells(*World,*Shape,Job.Key,Step,Mesh);
}
if(bHashDensity)
{
Out.bHasDensityHash=true;
for(const float Density:DensityValues)
{
Out.DensityHash^=std::bit_cast<uint32>(Density);
Out.DensityHash*=1099511628211ull;
}
}
if(bProfile)
{
const VoxelDensityProfile::FSnapshot After=VoxelDensityProfile::SnapshotCurrentThread();
for(size_t I=0;I<Out.ProfileCycles.size();++I)
{
const size_t Bucket=I;
Out.ProfileCycles[I]=After.Cycles[Bucket]>=Before.Cycles[Bucket]
?After.Cycles[Bucket]-Before.Cycles[Bucket]:0;
}
}
Out.DensitySamples=static_cast<uint64>(FMath::Max<int64>(0,SampleCount));
Out.MeshPayloadAllocatedBytes=static_cast<uint64>(Mesh.Vertices.GetAllocatedSize())
+static_cast<uint64>(Mesh.Normals.GetAllocatedSize())
+static_cast<uint64>(Mesh.UVs.GetAllocatedSize())
+static_cast<uint64>(Mesh.Colors.GetAllocatedSize())
+static_cast<uint64>(Mesh.Triangles.GetAllocatedSize());
if(bHashDensity)
{
Out.PayloadHash=HashStandaloneMeshPayload(Mesh);Out.bHasPayloadHash=true;
Out.TopologyHash=HashStandaloneMeshTopology(Mesh);Out.bHasTopologyHash=true;
}
Out.Vertices.reserve(static_cast<size_t>(Mesh.Vertices.Num()));
for(int32 I=0;I<Mesh.Vertices.Num();++I)
{
const FVector& P=Mesh.Vertices[I];const FVector& N=Mesh.Normals[I];
Out.Vertices.push_back({
{static_cast<float>(P.X*0.01),static_cast<float>(P.Y*0.01),static_cast<float>(P.Z*0.01)},
{static_cast<float>(N.X),static_cast<float>(N.Y),static_cast<float>(N.Z)}});
}
Out.Indices.reserve(static_cast<size_t>(Mesh.Triangles.Num()));
for(const int32 Index:Mesh.Triangles)Out.Indices.push_back(static_cast<uint32>(Index));
if(bHashDensity)
{Out.MeshHash=HashStandaloneCpuTileMesh(Out);Out.bHasMeshHash=true;}
Out.WorkerSeconds=std::chrono::duration<double>(FClock::now()-StartTime).count();
Out.CompletedAt=FClock::now();
return Out;
}
void WorkerLoop()
{
for(;;)
{
FStandaloneTileJob Job;
{
std::unique_lock<std::mutex> Lock(Mutex);
Wake.wait(Lock,[&](){return bStop||!Queue.empty();});
if(bStop)return;
std::pop_heap(Queue.begin(),Queue.end(),FStandaloneTileJobHeapOrder{});
Job=Queue.back();Queue.pop_back();
}
FStandaloneCpuTile Tile=Generate(Job);
{
std::lock_guard<std::mutex> Lock(Mutex);
if(bStop)return;
Ready.push_back(std::move(Tile));
}
}
}
using FClock=std::chrono::steady_clock;
FStandaloneOwnerWorld* World=nullptr;
int32 WorkerCount=8;
bool bHashDensity=false;
const FStandaloneMeshCache* MeshCache=nullptr;
int32 MaxLevelFilter=-1;
bool bSkipUvAndColors=false;
bool bSkipMaterialGroups=false;
bool bSkipUV=false;
bool bSkipColors=false;
std::atomic<uint64> CacheHitCount{0};
mutable std::mutex Mutex;
std::condition_variable Wake;
bool bStop=true;
std::vector<std::thread> Workers;
std::vector<FStandaloneTileJob> Queue;
std::vector<FStandaloneCpuTile> Ready;
std::unordered_set<FVoxelTileKey,FStandaloneTileKeyHash> Desired;
std::unordered_set<FVoxelTileKey,FStandaloneTileKeyHash> Outstanding;
std::unordered_set<FVoxelTileKey,FStandaloneTileKeyHash> TileFilter;
bool bUseTileFilter=false;
FStandaloneDesiredTileSet CurrentDesired;
int32 FullResTileCount=0;
};
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