/**
* Creates a FStaticMeshRenderData from a D3DXMesh
* @param DestMesh Destination mesh to extract to
* @param NumUVs Number of UVs
* @param Elements Elements array
* @return Boolean representing success or failure
*/
bool ConvertD3DXMeshToRawMesh(
TRefCountPtr<ID3DXMesh>& D3DMesh,
FRawMesh& DestMesh,
int32 NumUVs
)
{
// Extract simplified data to LOD
FUtilVertex* D3DVertices;
uint16* D3DIndices;
::DWORD * D3DAttributes;
D3DMesh->LockVertexBuffer(D3DLOCK_READONLY,(LPVOID*)&D3DVertices);
D3DMesh->LockIndexBuffer(D3DLOCK_READONLY,(LPVOID*)&D3DIndices);
D3DMesh->LockAttributeBuffer(D3DLOCK_READONLY,&D3DAttributes);
int32 NumFaces = D3DMesh->GetNumFaces();
int32 NumWedges = NumFaces * 3;
DestMesh.FaceMaterialIndices.Init(NumFaces);
DestMesh.FaceSmoothingMasks.Init(NumFaces);
DestMesh.VertexPositions.Init(NumWedges);
DestMesh.WedgeIndices.Init(NumWedges);
DestMesh.WedgeColors.Init(NumWedges);
DestMesh.WedgeTangentX.Init(NumWedges);
DestMesh.WedgeTangentY.Init(NumWedges);
DestMesh.WedgeTangentZ.Init(NumWedges);
for (int32 UVIndex = 0; UVIndex < NumUVs; ++UVIndex)
{
DestMesh.WedgeTexCoords[UVIndex].Init(NumWedges);
}
for(int32 I=0;I<NumFaces;I++)
{
// Copy smoothing mask and index from any vertex into this triangle
DestMesh.FaceSmoothingMasks[I] = D3DVertices[D3DIndices[I*3+0]].SmoothingMask;
DestMesh.FaceMaterialIndices[I] = D3DAttributes[I];
for(int UVs=0;UVs<NumUVs;UVs++)
{
DestMesh.WedgeTexCoords[UVs][I*3+0] = D3DVertices[D3DIndices[I*3+0]].UVs[UVs];
DestMesh.WedgeTexCoords[UVs][I*3+1] = D3DVertices[D3DIndices[I*3+1]].UVs[UVs];
DestMesh.WedgeTexCoords[UVs][I*3+2] = D3DVertices[D3DIndices[I*3+2]].UVs[UVs];
}
for(int32 K=0;K<3;K++)
{
DestMesh.WedgeIndices[I*3+K] = I*3+K;
DestMesh.VertexPositions[I*3+K] = D3DVertices[D3DIndices[I*3+K]].Position;
DestMesh.WedgeColors[I*3+K] = D3DVertices[D3DIndices[I*3+K]].Color;
DestMesh.WedgeTangentX[I*3+K] = D3DVertices[D3DIndices[I*3+K]].TangentX;
DestMesh.WedgeTangentY[I*3+K] = D3DVertices[D3DIndices[I*3+K]].TangentY;
DestMesh.WedgeTangentZ[I*3+K] = D3DVertices[D3DIndices[I*3+K]].TangentZ;
}
}
D3DMesh->UnlockIndexBuffer();
D3DMesh->UnlockVertexBuffer();
D3DMesh->UnlockAttributeBuffer();
return true;
}
bool FD3D9MeshUtilities::GenerateUVs(
struct FRawMesh& RawMesh,
uint32 TexCoordIndex,
float MinChartSpacingPercent,
float BorderSpacingPercent,
bool bUseMaxStretch,
const TArray< int32 >* InFalseEdgeIndices,
uint32& MaxCharts,
float& MaxDesiredStretch,
FText& OutError
)
{
OutError = FText();
if(!IsValid())
{
OutError = LOCTEXT("GenerateUVs_FailedInvalid", "GenerateUVs failed, mesh was invalid.");
return false;
}
int32 NumTexCoords = 0;
for (int32 i = 0; i < MAX_MESH_TEXTURE_COORDS; ++i)
{
if (RawMesh.WedgeTexCoords[i].Num() != RawMesh.WedgeIndices.Num())
{
break;
}
NumTexCoords++;
}
if (TexCoordIndex > (uint32)NumTexCoords)
{
OutError = LOCTEXT("GenerateUVs_FailedUVs", "GenerateUVs failed, incorrect number of texcoords.");
return false;
}
TRefCountPtr<ID3DXMesh> ChartMesh;
TArray<uint32> AtlasAndChartAdjacency;
TArray<int32> AtlasAndChartTriangleCharts;
{
const bool bUseFalseEdges = InFalseEdgeIndices != NULL;
// When using false edges we don't remove degenerates as we want our incoming selected edge list to map
// correctly to the D3DXMesh.
const bool bRemoveDegenerateTriangles = !bUseFalseEdges;
// Create a D3DXMesh for the triangles being charted.
TRefCountPtr<ID3DXMesh> SourceMesh;
if (!ConvertRawMeshToD3DXMesh(Device, RawMesh,bRemoveDegenerateTriangles,SourceMesh))
{
OutError = LOCTEXT("GenerateUVs_FailedConvert", "GenerateUVs failed, couldn't convert to a D3DXMesh.");
return false;
}
//generate adjacency info for the mesh, which is needed later
TArray<uint32> Adjacency;
GenerateAdjacency(SourceMesh,Adjacency,FFragmentedAdjacencyFilter());
// We don't clean the mesh as this can collapse vertices or delete degenerate triangles, and
// we want our incoming selected edge list to map correctly to the D3DXMesh.
if( !bUseFalseEdges )
{
//clean the mesh
TRefCountPtr<ID3DXMesh> TempMesh;
TArray<uint32> CleanedAdjacency;
CleanedAdjacency.AddUninitialized(SourceMesh->GetNumFaces() * 3);
if( FAILED(D3DXCleanMesh( D3DXCLEAN_SIMPLIFICATION, SourceMesh, (::DWORD *)Adjacency.GetTypedData(), TempMesh.GetInitReference(),
(::DWORD *)CleanedAdjacency.GetTypedData(), NULL ) ) )
{
OutError = LOCTEXT("GenerateUVs_FailedClean", "GenerateUVs failed, couldn't clean mesh.");
return false;
}
SourceMesh = TempMesh;
Adjacency = CleanedAdjacency;
}
// Setup the D3DX "false edge" array. This is three DWORDS per face that define properties of the
// face's edges. Values of -1 indicates that the edge may be used as a UV seam in a the chart. Any
// other value indicates that the edge should never be a UV seam. This essentially allows us to
// provide a precise list of edges to be used as UV seams in the new charts.
uint32* FalseEdgeArray = NULL;
TArray<uint32> FalseEdges;
if( bUseFalseEdges )
{
// -1 means "always use this edge as a chart UV seam" to D3DX
FalseEdges.AddUninitialized( SourceMesh->GetNumFaces() * 3 );
for( int32 CurFalseEdgeIndex = 0; CurFalseEdgeIndex < (int32)SourceMesh->GetNumFaces() * 3; ++CurFalseEdgeIndex )
{
FalseEdges[ CurFalseEdgeIndex ] = -1;
}
// For each tagged edge
for( int32 CurTaggedEdgeIndex = 0; CurTaggedEdgeIndex < InFalseEdgeIndices->Num(); ++CurTaggedEdgeIndex )
{
const int32 EdgeIndex = ( *InFalseEdgeIndices )[ CurTaggedEdgeIndex ];
// Mark this as a false edge by setting it to a value other than negative one
FalseEdges[ EdgeIndex ] = Adjacency[ CurTaggedEdgeIndex ];
}
FalseEdgeArray = (uint32*)FalseEdges.GetTypedData();
}
// Partition the mesh's triangles into charts.
TRefCountPtr<ID3DXBuffer> PartitionResultAdjacencyBuffer;
TRefCountPtr<ID3DXBuffer> FacePartitionBuffer;
HRESULT Result = D3DXUVAtlasPartition(
SourceMesh,
bUseMaxStretch ? 0 : MaxCharts, // Max charts (0 = use max stretch instead)
MaxDesiredStretch,
TexCoordIndex,
(::DWORD *)Adjacency.GetTypedData(),
(::DWORD *)FalseEdgeArray, // False edges
NULL, // IMT data
&GenerateUVsStatusCallback,
0.01f, // Callback frequency
NULL, // Callback user data
D3DXUVATLAS_GEODESIC_QUALITY,
ChartMesh.GetInitReference(),
FacePartitionBuffer.GetInitReference(),
NULL,
PartitionResultAdjacencyBuffer.GetInitReference(),
&MaxDesiredStretch,
&MaxCharts
);
if (FAILED(Result))
{
UE_LOG(LogD3D9MeshUtils, Warning,
TEXT("D3DXUVAtlasPartition() returned %u with MaxDesiredStretch=%.2f, TexCoordIndex=%u."),
Result,
MaxDesiredStretch,
TexCoordIndex
);
OutError = LOCTEXT("GenerateUVs_FailedPartition", "GenerateUVs failed, D3DXUVAtlasPartition failed.");
return false;
}
// Extract the chart adjacency data from the D3DX buffer into an array.
for(uint32 TriangleIndex = 0;TriangleIndex < ChartMesh->GetNumFaces();TriangleIndex++)
{
for(int32 EdgeIndex = 0;EdgeIndex < 3;EdgeIndex++)
{
AtlasAndChartAdjacency.Add(*((uint32*)PartitionResultAdjacencyBuffer->GetBufferPointer()+TriangleIndex*3+EdgeIndex));
}
}
// Extract the triangle chart data from the D3DX buffer into an array.
uint32* FacePartitionBufferPointer = (uint32*)FacePartitionBuffer->GetBufferPointer();
for(uint32 TriangleIndex = 0;TriangleIndex < ChartMesh->GetNumFaces();TriangleIndex++)
{
AtlasAndChartTriangleCharts.Add(*FacePartitionBufferPointer++);
}
// Scale the partitioned UVs down.
FUtilVertex* LockedVertices;
ChartMesh->LockVertexBuffer(0,(LPVOID*)&LockedVertices);
for(uint32 VertexIndex = 0;VertexIndex < ChartMesh->GetNumVertices();VertexIndex++)
{
LockedVertices[VertexIndex].UVs[TexCoordIndex] /= 2048.0f;
}
ChartMesh->UnlockVertexBuffer();
}
if(ChartMesh)
{
// Create a buffer to hold the triangle chart data.
TRefCountPtr<ID3DXBuffer> MergedTriangleChartsBuffer;
VERIFYD3D9RESULT(D3DXCreateBuffer(
AtlasAndChartTriangleCharts.Num() * sizeof(int32),
MergedTriangleChartsBuffer.GetInitReference()
));
uint32* MergedTriangleChartsBufferPointer = (uint32*)MergedTriangleChartsBuffer->GetBufferPointer();
for(int32 TriangleIndex = 0;TriangleIndex < AtlasAndChartTriangleCharts.Num();TriangleIndex++)
{
*MergedTriangleChartsBufferPointer++ = AtlasAndChartTriangleCharts[TriangleIndex];
}
const uint32 FakeTexSize = 1024;
const float GutterSize = ( float )FakeTexSize * MinChartSpacingPercent * 0.01f;
// Pack the charts into a unified atlas.
HRESULT Result = D3DXUVAtlasPack(
ChartMesh,
FakeTexSize,
FakeTexSize,
GutterSize,
TexCoordIndex,
(::DWORD *)AtlasAndChartAdjacency.GetTypedData(),
&GenerateUVsStatusCallback,
0.01f, // Callback frequency
NULL,
0,
MergedTriangleChartsBuffer
);
if (FAILED(Result))
{
UE_LOG(LogD3D9MeshUtils, Warning,
TEXT("D3DXUVAtlasPack() returned %u."),
Result
);
OutError = LOCTEXT("GenerateUVs_FailedPack", "GenerateUVs failed, D3DXUVAtlasPack failed.");
return false;
}
int32 NewNumTexCoords = FMath::Max<int32>(NumTexCoords, TexCoordIndex + 1);
FRawMesh FinalMesh;
if (!ConvertD3DXMeshToRawMesh(ChartMesh, FinalMesh, NewNumTexCoords))
{
OutError = LOCTEXT("GenerateUVs_FailedSimple", "GenerateUVs failed, couldn't convert the simplified D3DXMesh back to a UStaticMesh.");
return false;
}
// Scale/offset the UVs appropriately to ensure there is empty space around the border
{
const float BorderSize = BorderSpacingPercent * 0.01f;
const float ScaleAmount = 1.0f - BorderSize * 2.0f;
for( int32 CurUVIndex = 0; CurUVIndex < MAX_MESH_TEXTURE_COORDS; ++CurUVIndex )
{
int32 NumWedges = FinalMesh.WedgeTexCoords[CurUVIndex].Num();
for( int32 WedgeIndex = 0; WedgeIndex < NumWedges; ++WedgeIndex )
{
FVector2D& UV = FinalMesh.WedgeTexCoords[CurUVIndex][WedgeIndex];
UV.X = BorderSize + UV.X * ScaleAmount;
UV.Y = BorderSize + UV.Y * ScaleAmount;
}
}
}
RawMesh = FinalMesh;
}
return true;
}
bool FD3D9MeshUtilities::LayoutUVs(
struct FRawMesh& RawMesh,
uint32 TextureResolution,
uint32 TexCoordIndex,
FText& OutError
)
{
OutError = FText();
if(!IsValid() || !RawMesh.IsValid())
{
OutError = LOCTEXT("LayoutUVs_FailedInvalid", "LayoutUVs failed, mesh was invalid.");
return false;
}
int32 NumTexCoords = 0;
for (int32 i = 0; i < MAX_MESH_TEXTURE_COORDS; ++i)
{
if (RawMesh.WedgeTexCoords[i].Num() != RawMesh.WedgeIndices.Num())
{
break;
}
NumTexCoords++;
}
if (TexCoordIndex > (uint32)NumTexCoords)
{
OutError = LOCTEXT("LayoutUVs_FailedUVs", "LayoutUVs failed, incorrect number of texcoords.");
return false;
}
// Sort the mesh's triangles by whether they need to be charted, or just to be packed into the atlas.
FRawMesh MeshToAtlas = RawMesh;
if (TexCoordIndex > 0)
{
MeshToAtlas.WedgeTexCoords[TexCoordIndex] = MeshToAtlas.WedgeTexCoords[0];
}
TRefCountPtr<ID3DXMesh> ChartMesh;
TArray<uint32> AtlasAndChartAdjacency;
TArray<int32> AtlasAndChartTriangleCharts;
TRefCountPtr<ID3DXMesh> MergedMesh;
TArray<uint32> MergedAdjacency;
TArray<int32> MergedTriangleCharts;
TRefCountPtr<ID3DXMesh> AtlasOnlyMesh;
TArray<uint32> AtlasOnlyAdjacency;
TArray<int32> AtlasOnlyTriangleCharts;
{
// Create a D3DXMesh for the triangles that only need to be atlassed.
const bool bRemoveDegenerateTriangles = true;
if (!ConvertRawMeshToD3DXMesh(Device,MeshToAtlas,bRemoveDegenerateTriangles,AtlasOnlyMesh))
{
OutError = LOCTEXT("LayoutUVs_FailedConvert", "LayoutUVs failed, couldn't convert to a D3DXMesh.");
return false;
}
// generate mapping orientations info
FLayoutUVWindingInfo WindingInfo(AtlasOnlyMesh, TexCoordIndex);
// Generate adjacency for the pre-charted triangles based on their input charts.
GenerateAdjacency(AtlasOnlyMesh,AtlasOnlyAdjacency,FUVChartAdjacencyFilter(TexCoordIndex), &WindingInfo);
////clean the mesh
TRefCountPtr<ID3DXMesh> TempMesh;
TArray<uint32> CleanedAdjacency;
CleanedAdjacency.AddUninitialized(AtlasOnlyMesh->GetNumFaces() * 3);
if( FAILED(D3DXCleanMesh( D3DXCLEAN_SIMPLIFICATION,
AtlasOnlyMesh,
(::DWORD *)AtlasOnlyAdjacency.GetTypedData(),
TempMesh.GetInitReference(),
(::DWORD *)CleanedAdjacency.GetTypedData(),
NULL ) ) )
{
OutError = LOCTEXT("LayoutUVs_FailedClean", "LayoutUVs failed, couldn't clean mesh.");
return false;
}
// Group the pre-charted triangles into indexed charts based on their adjacency in the chart.
AssignMinimalAdjacencyGroups(CleanedAdjacency,AtlasOnlyTriangleCharts);
MergedMesh = TempMesh;
MergedAdjacency = CleanedAdjacency;
MergedTriangleCharts = AtlasOnlyTriangleCharts;
}
if(MergedMesh)
{
// Create a buffer to hold the triangle chart data.
TRefCountPtr<ID3DXBuffer> MergedTriangleChartsBuffer;
VERIFYD3D9RESULT(D3DXCreateBuffer(
MergedTriangleCharts.Num() * sizeof(int32),
MergedTriangleChartsBuffer.GetInitReference()
));
uint32* MergedTriangleChartsBufferPointer = (uint32*)MergedTriangleChartsBuffer->GetBufferPointer();
for(int32 TriangleIndex = 0;TriangleIndex < MergedTriangleCharts.Num();TriangleIndex++)
{
*MergedTriangleChartsBufferPointer++ = MergedTriangleCharts[TriangleIndex];
}
const float GutterSize = 2.0f;
// Pack the charts into a unified atlas.
HRESULT Result = D3DXUVAtlasPack(
MergedMesh,
TextureResolution,
TextureResolution,
GutterSize,
TexCoordIndex,
(::DWORD *)MergedAdjacency.GetTypedData(),
NULL,
0,
NULL,
0,
MergedTriangleChartsBuffer
);
if (FAILED(Result))
{
UE_LOG(LogD3D9MeshUtils, Warning,
TEXT("D3DXUVAtlasPack() returned %u."),
Result
);
OutError = LOCTEXT("LayoutUVs_FailedPack", "LayoutUVs failed, D3DXUVAtlasPack failed.");
return false;
}
int32 NewNumTexCoords = FMath::Max<int32>(NumTexCoords, TexCoordIndex + 1);
FRawMesh FinalMesh;
if (!ConvertD3DXMeshToRawMesh(MergedMesh, FinalMesh, NewNumTexCoords))
{
OutError = LOCTEXT("LayoutUVs_FailedSimple", "LayoutUVs failed, couldn't convert the simplified D3DXMesh back to a UStaticMesh.");
return false;
}
RawMesh = FinalMesh;
}
return true;
}