/** Updates GCurrentSelectedLightmapSample given a selected actor's components and the location of the click. */
void SetDebugLightmapSample(TArray<UActorComponent*>* Components, UModel* Model, int32 iSurf, FVector ClickLocation)
{
UStaticMeshComponent* SMComponent = NULL;
if (Components)
{
// Find the first supported component
for (int32 ComponentIndex = 0; ComponentIndex < Components->Num() && !SMComponent; ComponentIndex++)
{
SMComponent = Cast<UStaticMeshComponent>((*Components)[ComponentIndex]);
if (SMComponent && (!SMComponent->StaticMesh || SMComponent->LODData.Num() == 0))
{
SMComponent = NULL;
}
}
}
bool bFoundLightmapSample = false;
// Only static mesh components and BSP handled for now
if (SMComponent)
{
UStaticMesh* StaticMesh = SMComponent->StaticMesh;
check(StaticMesh);
check(StaticMesh->RenderData);
check(StaticMesh->RenderData->LODResources.Num());
// Only supporting LOD0
const int32 LODIndex = 0;
FStaticMeshLODResources& LODModel = StaticMesh->RenderData->LODResources[LODIndex];
FIndexArrayView Indices = LODModel.IndexBuffer.GetArrayView();
const bool bHasStaticLighting = SMComponent->HasStaticLighting();
if (bHasStaticLighting)
{
bool bUseTextureMap = false;
int32 LightmapSizeX = 0;
int32 LightmapSizeY = 0;
SMComponent->GetLightMapResolution(LightmapSizeX, LightmapSizeY);
if (LightmapSizeX > 0 && LightmapSizeY > 0
&& StaticMesh->LightMapCoordinateIndex >= 0
&& (uint32)StaticMesh->LightMapCoordinateIndex < LODModel.VertexBuffer.GetNumTexCoords()
)
{
bUseTextureMap = true;
}
else
{
bUseTextureMap = false;
}
// Search through the static mesh's triangles for the one that was hit (since we can't get triangle index from a line check)
for(int32 TriangleIndex = 0; TriangleIndex < Indices.Num(); TriangleIndex += 3)
{
uint32 Index0 = Indices[TriangleIndex];
uint32 Index1 = Indices[TriangleIndex + 1];
uint32 Index2 = Indices[TriangleIndex + 2];
// Transform positions to world space
FVector Position0 = SMComponent->ComponentToWorld.TransformPosition(LODModel.PositionVertexBuffer.VertexPosition(Index0));
FVector Position1 = SMComponent->ComponentToWorld.TransformPosition(LODModel.PositionVertexBuffer.VertexPosition(Index1));
FVector Position2 = SMComponent->ComponentToWorld.TransformPosition(LODModel.PositionVertexBuffer.VertexPosition(Index2));
FVector BaryCentricWeights;
// Continue if click location is in the triangle and get its barycentric weights
if (GetBarycentricWeights(Position0, Position1, Position2, ClickLocation, .001f, BaryCentricWeights))
{
RestoreSelectedLightmapSample();
if (bUseTextureMap)
{
// Fetch lightmap UV's
FVector2D LightmapUV0 = LODModel.VertexBuffer.GetVertexUV(Index0, StaticMesh->LightMapCoordinateIndex);
FVector2D LightmapUV1 = LODModel.VertexBuffer.GetVertexUV(Index1, StaticMesh->LightMapCoordinateIndex);
FVector2D LightmapUV2 = LODModel.VertexBuffer.GetVertexUV(Index2, StaticMesh->LightMapCoordinateIndex);
// Interpolate lightmap UV's to the click location
FVector2D InterpolatedUV = LightmapUV0 * BaryCentricWeights.X + LightmapUV1 * BaryCentricWeights.Y + LightmapUV2 * BaryCentricWeights.Z;
int32 PaddedSizeX = LightmapSizeX;
int32 PaddedSizeY = LightmapSizeY;
if (GLightmassDebugOptions.bPadMappings && GAllowLightmapPadding && LightmapSizeX - 2 > 0 && LightmapSizeY - 2 > 0)
{
PaddedSizeX -= 2;
PaddedSizeY -= 2;
}
const int32 LocalX = FMath::TruncToInt(InterpolatedUV.X * PaddedSizeX);
const int32 LocalY = FMath::TruncToInt(InterpolatedUV.Y * PaddedSizeY);
if (LocalX < 0 || LocalX >= PaddedSizeX
|| LocalY < 0 || LocalY >= PaddedSizeY)
{
UE_LOG(LogStaticLightingSystem, Log, TEXT("Texel selection failed because the lightmap UV's wrap!"));
}
else
{
bFoundLightmapSample = UpdateSelectedTexel(SMComponent, -1, SMComponent->LODData[LODIndex].LightMap, ClickLocation, InterpolatedUV, LocalX, LocalY, LightmapSizeX, LightmapSizeY);
}
}
break;
}
}
if (!bFoundLightmapSample && Indices.Num() > 0)
{
const int32 SelectedTriangle = FMath::RandRange(0, Indices.Num() / 3 - 1);
uint32 Index0 = Indices[SelectedTriangle];
uint32 Index1 = Indices[SelectedTriangle + 1];
uint32 Index2 = Indices[SelectedTriangle + 2];
FVector2D LightmapUV0 = LODModel.VertexBuffer.GetVertexUV(Index0, StaticMesh->LightMapCoordinateIndex);
FVector2D LightmapUV1 = LODModel.VertexBuffer.GetVertexUV(Index1, StaticMesh->LightMapCoordinateIndex);
FVector2D LightmapUV2 = LODModel.VertexBuffer.GetVertexUV(Index2, StaticMesh->LightMapCoordinateIndex);
FVector BaryCentricWeights;
BaryCentricWeights.X = FMath::FRandRange(0, 1);
BaryCentricWeights.Y = FMath::FRandRange(0, 1);
if (BaryCentricWeights.X + BaryCentricWeights.Y >= 1)
{
BaryCentricWeights.X = 1 - BaryCentricWeights.X;
BaryCentricWeights.Y = 1 - BaryCentricWeights.Y;
}
BaryCentricWeights.Z = 1 - BaryCentricWeights.X - BaryCentricWeights.Y;
FVector2D InterpolatedUV = LightmapUV0 * BaryCentricWeights.X + LightmapUV1 * BaryCentricWeights.Y + LightmapUV2 * BaryCentricWeights.Z;
UE_LOG(LogStaticLightingSystem, Log, TEXT("Failed to intersect any triangles, picking random texel"));
int32 PaddedSizeX = LightmapSizeX;
int32 PaddedSizeY = LightmapSizeY;
if (GLightmassDebugOptions.bPadMappings && GAllowLightmapPadding && LightmapSizeX - 2 > 0 && LightmapSizeY - 2 > 0)
{
PaddedSizeX -= 2;
PaddedSizeY -= 2;
}
const int32 LocalX = FMath::TruncToInt(InterpolatedUV.X * PaddedSizeX);
const int32 LocalY = FMath::TruncToInt(InterpolatedUV.Y * PaddedSizeY);
if (LocalX < 0 || LocalX >= PaddedSizeX
|| LocalY < 0 || LocalY >= PaddedSizeY)
{
UE_LOG(LogStaticLightingSystem, Log, TEXT("Texel selection failed because the lightmap UV's wrap!"));
}
else
{
bFoundLightmapSample = UpdateSelectedTexel(SMComponent, -1, SMComponent->LODData[LODIndex].LightMap, ClickLocation, InterpolatedUV, LocalX, LocalY, LightmapSizeX, LightmapSizeY);
}
}
}
}
else if (Model)
{
UWorld* World = Model->LightingLevel->OwningWorld;
check( World);
for (int32 ModelIndex = 0; ModelIndex < World->GetCurrentLevel()->ModelComponents.Num(); ModelIndex++)
{
UModelComponent* CurrentComponent = World->GetCurrentLevel()->ModelComponents[ModelIndex];
int32 LightmapSizeX = 0;
int32 LightmapSizeY = 0;
CurrentComponent->GetLightMapResolution(LightmapSizeX, LightmapSizeY);
if (LightmapSizeX > 0 && LightmapSizeY > 0)
{
for (int32 ElementIndex = 0; ElementIndex < CurrentComponent->GetElements().Num(); ElementIndex++)
{
FModelElement& Element = CurrentComponent->GetElements()[ElementIndex];
TScopedPointer<FRawIndexBuffer16or32>* IndexBufferRef = Model->MaterialIndexBuffers.Find(Element.Material);
check(IndexBufferRef);
for(uint32 TriangleIndex = Element.FirstIndex; TriangleIndex < Element.FirstIndex + Element.NumTriangles * 3; TriangleIndex += 3)
{
uint32 Index0 = (*IndexBufferRef)->Indices[TriangleIndex];
uint32 Index1 = (*IndexBufferRef)->Indices[TriangleIndex + 1];
uint32 Index2 = (*IndexBufferRef)->Indices[TriangleIndex + 2];
FModelVertex* ModelVertices = (FModelVertex*)Model->VertexBuffer.Vertices.GetData();
FVector Position0 = ModelVertices[Index0].Position;
FVector Position1 = ModelVertices[Index1].Position;
FVector Position2 = ModelVertices[Index2].Position;
FVector BaryCentricWeights;
// Continue if click location is in the triangle and get its barycentric weights
if (GetBarycentricWeights(Position0, Position1, Position2, ClickLocation, .001f, BaryCentricWeights))
{
RestoreSelectedLightmapSample();
// Fetch lightmap UV's
FVector2D LightmapUV0 = ModelVertices[Index0].ShadowTexCoord;
FVector2D LightmapUV1 = ModelVertices[Index1].ShadowTexCoord;
FVector2D LightmapUV2 = ModelVertices[Index2].ShadowTexCoord;
// Interpolate lightmap UV's to the click location
FVector2D InterpolatedUV = LightmapUV0 * BaryCentricWeights.X + LightmapUV1 * BaryCentricWeights.Y + LightmapUV2 * BaryCentricWeights.Z;
// Find the node index belonging to the selected triangle
const UModel* CurrentModel = CurrentComponent->GetModel();
int32 SelectedNodeIndex = INDEX_NONE;
for (int32 ElementNodeIndex = 0; ElementNodeIndex < Element.Nodes.Num(); ElementNodeIndex++)
{
const FBspNode& CurrentNode = CurrentModel->Nodes[Element.Nodes[ElementNodeIndex]];
if ((int32)Index0 >= CurrentNode.iVertexIndex && (int32)Index0 < CurrentNode.iVertexIndex + CurrentNode.NumVertices)
{
SelectedNodeIndex = Element.Nodes[ElementNodeIndex];
}
}
check(SelectedNodeIndex >= 0);
TArray<ULightComponentBase*> DummyLights;
// fill out the model's NodeGroups (not the mapping part of it, but the nodes part)
Model->GroupAllNodes(World->GetCurrentLevel(), DummyLights);
// Find the FGatheredSurface that the selected node got put into during the last lighting rebuild
TArray<int32> GatheredNodes;
// find the NodeGroup that this node went into, and get all of its node
for (TMap<int32, FNodeGroup*>::TIterator It(Model->NodeGroups); It && GatheredNodes.Num() == 0; ++It)
{
FNodeGroup* NodeGroup = It.Value();
for (int32 NodeIndex = 0; NodeIndex < NodeGroup->Nodes.Num(); NodeIndex++)
{
if (NodeGroup->Nodes[NodeIndex] == SelectedNodeIndex)
{
GatheredNodes = NodeGroup->Nodes;
break;
}
}
}
check(GatheredNodes.Num() > 0);
// use the surface of the selected node, it will have to suffice for the GetSurfaceLightMapResolution() call
int32 SelectedGatheredSurfIndex = Model->Nodes[SelectedNodeIndex].iSurf;
// Get the lightmap resolution used by the FGatheredSurface containing the selected node
FMatrix WorldToMap;
CurrentComponent->GetSurfaceLightMapResolution(SelectedGatheredSurfIndex, 1, LightmapSizeX, LightmapSizeY, WorldToMap, &GatheredNodes);
int32 PaddedSizeX = LightmapSizeX;
int32 PaddedSizeY = LightmapSizeY;
if (GLightmassDebugOptions.bPadMappings && GAllowLightmapPadding && LightmapSizeX - 2 > 0 && LightmapSizeY - 2 > 0)
{
PaddedSizeX -= 2;
PaddedSizeY -= 2;
}
check(LightmapSizeX > 0 && LightmapSizeY > 0);
// Apply the transform to the intersection position to find the local texel coordinates
const FVector4 StaticLightingTextureCoordinate = WorldToMap.TransformPosition(ClickLocation);
const int32 LocalX = FMath::TruncToInt(StaticLightingTextureCoordinate.X * PaddedSizeX);
const int32 LocalY = FMath::TruncToInt(StaticLightingTextureCoordinate.Y * PaddedSizeY);
check(LocalX >= 0 && LocalX < PaddedSizeX && LocalY >= 0 && LocalY < PaddedSizeY);
bFoundLightmapSample = UpdateSelectedTexel(
CurrentComponent,
SelectedNodeIndex,
Element.LightMap,
ClickLocation,
InterpolatedUV,
LocalX, LocalY,
LightmapSizeX, LightmapSizeY);
if (!bFoundLightmapSample)
{
RestoreSelectedLightmapSample();
GCurrentSelectedLightmapSample = FSelectedLightmapSample();
}
return;
}
}
}
}
}
}
if (!bFoundLightmapSample)
{
RestoreSelectedLightmapSample();
GCurrentSelectedLightmapSample = FSelectedLightmapSample();
}
}
void FStaticMeshEditorViewportClient::Draw(const FSceneView* View,FPrimitiveDrawInterface* PDI)
{
FEditorViewportClient::Draw(View, PDI);
if (bShowCollision && StaticMesh->BodySetup)
{
const FColor SelectedColor(149, 223, 157);
const FColor UnselectedColor(157, 149, 223);
// Draw bodies
FKAggregateGeom* AggGeom = &StaticMesh->BodySetup->AggGeom;
for (int32 i = 0; i < AggGeom->SphereElems.Num(); ++i)
{
HSMECollisionProxy* HitProxy = new HSMECollisionProxy(KPT_Sphere, i);
PDI->SetHitProxy(HitProxy);
const FColor CollisionColor = StaticMeshEditorPtr.Pin()->IsSelectedPrim(HitProxy->PrimData) ? SelectedColor : UnselectedColor;
const FKSphereElem& SphereElem = AggGeom->SphereElems[i];
const FTransform ElemTM = SphereElem.GetTransform();
SphereElem.DrawElemWire(PDI, ElemTM, 1.f, CollisionColor);
PDI->SetHitProxy(NULL);
}
for (int32 i = 0; i < AggGeom->BoxElems.Num(); ++i)
{
HSMECollisionProxy* HitProxy = new HSMECollisionProxy(KPT_Box, i);
PDI->SetHitProxy(HitProxy);
const FColor CollisionColor = StaticMeshEditorPtr.Pin()->IsSelectedPrim(HitProxy->PrimData) ? SelectedColor : UnselectedColor;
const FKBoxElem& BoxElem = AggGeom->BoxElems[i];
const FTransform ElemTM = BoxElem.GetTransform();
BoxElem.DrawElemWire(PDI, ElemTM, 1.f, CollisionColor);
PDI->SetHitProxy(NULL);
}
for (int32 i = 0; i < AggGeom->SphylElems.Num(); ++i)
{
HSMECollisionProxy* HitProxy = new HSMECollisionProxy(KPT_Sphyl, i);
PDI->SetHitProxy(HitProxy);
const FColor CollisionColor = StaticMeshEditorPtr.Pin()->IsSelectedPrim(HitProxy->PrimData) ? SelectedColor : UnselectedColor;
const FKSphylElem& SphylElem = AggGeom->SphylElems[i];
const FTransform ElemTM = SphylElem.GetTransform();
SphylElem.DrawElemWire(PDI, ElemTM, 1.f, CollisionColor);
PDI->SetHitProxy(NULL);
}
for (int32 i = 0; i < AggGeom->ConvexElems.Num(); ++i)
{
HSMECollisionProxy* HitProxy = new HSMECollisionProxy(KPT_Convex, i);
PDI->SetHitProxy(HitProxy);
const FColor CollisionColor = StaticMeshEditorPtr.Pin()->IsSelectedPrim(HitProxy->PrimData) ? SelectedColor : UnselectedColor;
const FKConvexElem& ConvexElem = AggGeom->ConvexElems[i];
const FTransform ElemTM = ConvexElem.GetTransform();
ConvexElem.DrawElemWire(PDI, ElemTM, CollisionColor);
PDI->SetHitProxy(NULL);
}
}
if( bShowSockets )
{
const FColor SocketColor = FColor(255, 128, 128);
for(int32 i=0; i < StaticMesh->Sockets.Num(); i++)
{
UStaticMeshSocket* Socket = StaticMesh->Sockets[i];
if(Socket)
{
FMatrix SocketTM;
Socket->GetSocketMatrix(SocketTM, StaticMeshComponent);
PDI->SetHitProxy( new HSMESocketProxy(i) );
DrawWireDiamond(PDI, SocketTM, 5.f, SocketColor, SDPG_Foreground);
PDI->SetHitProxy( NULL );
}
}
}
// Draw any edges that are currently selected by the user
if( SelectedEdgeIndices.Num() > 0 )
{
for(int32 VertexIndex = 0; VertexIndex < SelectedEdgeVertices.Num(); VertexIndex += 2)
{
FVector EdgeVertices[ 2 ];
EdgeVertices[ 0 ] = SelectedEdgeVertices[VertexIndex];
EdgeVertices[ 1 ] = SelectedEdgeVertices[VertexIndex + 1];
PDI->DrawLine(
StaticMeshComponent->ComponentToWorld.TransformPosition( EdgeVertices[ 0 ] ),
StaticMeshComponent->ComponentToWorld.TransformPosition( EdgeVertices[ 1 ] ),
FColor( 255, 255, 0 ),
SDPG_World );
}
}
if( bDrawNormals || bDrawTangents || bDrawBinormals )
{
FStaticMeshLODResources& LODModel = StaticMesh->RenderData->LODResources[StaticMeshEditorPtr.Pin()->GetCurrentLODIndex()];
FIndexArrayView Indices = LODModel.IndexBuffer.GetArrayView();
uint32 NumIndices = Indices.Num();
FMatrix LocalToWorldInverseTranspose = StaticMeshComponent->ComponentToWorld.ToMatrixWithScale().InverseFast().GetTransposed();
for (uint32 i = 0; i < NumIndices; i++)
{
const FVector& VertexPos = LODModel.PositionVertexBuffer.VertexPosition( Indices[i] );
const FVector WorldPos = StaticMeshComponent->ComponentToWorld.TransformPosition( VertexPos );
const FVector& Normal = LODModel.VertexBuffer.VertexTangentZ( Indices[i] );
const FVector& Binormal = LODModel.VertexBuffer.VertexTangentY( Indices[i] );
const FVector& Tangent = LODModel.VertexBuffer.VertexTangentX( Indices[i] );
const float Len = 5.0f;
if( bDrawNormals )
{
PDI->DrawLine( WorldPos, WorldPos+LocalToWorldInverseTranspose.TransformVector( Normal ).SafeNormal() * Len, FLinearColor( 0.0f, 1.0f, 0.0f), SDPG_World );
}
if( bDrawTangents )
{
PDI->DrawLine( WorldPos, WorldPos+LocalToWorldInverseTranspose.TransformVector( Tangent ).SafeNormal() * Len, FLinearColor( 1.0f, 0.0f, 0.0f), SDPG_World );
}
if( bDrawBinormals )
{
PDI->DrawLine( WorldPos, WorldPos+LocalToWorldInverseTranspose.TransformVector( Binormal ).SafeNormal() * Len, FLinearColor( 0.0f, 0.0f, 1.0f), SDPG_World );
}
}
}
if( bShowPivot )
{
FUnrealEdUtils::DrawWidget(View, PDI, StaticMeshComponent->ComponentToWorld.ToMatrixWithScale(), 0, 0, EAxisList::All, EWidgetMovementMode::WMM_Translate, false);
}
if( bDrawAdditionalData )
{
const TArray<UAssetUserData*>* UserDataArray = StaticMesh->GetAssetUserDataArray();
if (UserDataArray != NULL)
{
for (int32 AdditionalDataIndex = 0; AdditionalDataIndex < UserDataArray->Num(); ++AdditionalDataIndex)
{
if ((*UserDataArray)[AdditionalDataIndex] != NULL)
{
(*UserDataArray)[AdditionalDataIndex]->Draw(PDI, View);
}
}
}
}
}
/**
* Constructs a raw mesh from legacy render data.
*/
static void BuildRawMeshFromRenderData(
FRawMesh& OutRawMesh,
struct FMeshBuildSettings& OutBuildSettings,
FLegacyStaticMeshRenderData& RenderData,
const TCHAR* MeshName
)
{
FStaticMeshTriangle* RawTriangles = (FStaticMeshTriangle*)RenderData.RawTriangles.Lock(LOCK_READ_ONLY);
bool bBuiltFromRawTriangles = BuildRawMeshFromRawTriangles(
OutRawMesh,
OutBuildSettings,
RawTriangles,
RenderData.RawTriangles.GetElementCount(),
MeshName
);
RenderData.RawTriangles.Unlock();
if (bBuiltFromRawTriangles)
{
return;
}
OutRawMesh.Empty();
FIndexArrayView Indices = RenderData.IndexBuffer.GetArrayView();
int32 NumVertices = RenderData.PositionVertexBuffer.GetNumVertices();
int32 NumTriangles = Indices.Num() / 3;
int32 NumWedges = NumTriangles * 3;
// Copy vertex positions.
{
OutRawMesh.VertexPositions.AddUninitialized(NumVertices);
for (int32 i = 0; i < NumVertices; ++i)
{
OutRawMesh.VertexPositions[i] = RenderData.PositionVertexBuffer.VertexPosition(i);
}
}
// Copy per-wedge texture coordinates.
for (uint32 TexCoordIndex = 0; TexCoordIndex < RenderData.VertexBuffer.GetNumTexCoords(); ++TexCoordIndex)
{
OutRawMesh.WedgeTexCoords[TexCoordIndex].AddUninitialized(NumWedges);
for (int32 i = 0; i < NumWedges; ++i)
{
uint32 VertIndex = Indices[i];
OutRawMesh.WedgeTexCoords[TexCoordIndex][i] = RenderData.VertexBuffer.GetVertexUV(VertIndex, TexCoordIndex);
}
}
// Copy per-wedge colors if they exist.
if (RenderData.ColorVertexBuffer.GetNumVertices() > 0)
{
OutRawMesh.WedgeColors.AddUninitialized(NumWedges);
for (int32 i = 0; i < NumWedges; ++i)
{
uint32 VertIndex = Indices[i];
OutRawMesh.WedgeColors[i] = RenderData.ColorVertexBuffer.VertexColor(VertIndex);
}
}
// Copy per-wedge tangents.
{
OutRawMesh.WedgeTangentX.AddUninitialized(NumWedges);
OutRawMesh.WedgeTangentY.AddUninitialized(NumWedges);
OutRawMesh.WedgeTangentZ.AddUninitialized(NumWedges);
for (int32 i = 0; i < NumWedges; ++i)
{
uint32 VertIndex = Indices[i];
OutRawMesh.WedgeTangentX[i] = RenderData.VertexBuffer.VertexTangentX(VertIndex);
OutRawMesh.WedgeTangentY[i] = RenderData.VertexBuffer.VertexTangentY(VertIndex);
OutRawMesh.WedgeTangentZ[i] = RenderData.VertexBuffer.VertexTangentZ(VertIndex);
}
}
// Copy per-face information.
{
OutRawMesh.FaceMaterialIndices.AddZeroed(NumTriangles);
OutRawMesh.FaceSmoothingMasks.AddZeroed(NumTriangles);
OutRawMesh.WedgeIndices.AddZeroed(NumWedges);
for (int32 SectionIndex = 0; SectionIndex < RenderData.Elements.Num(); ++SectionIndex)
{
const FLegacyStaticMeshElement& Section = RenderData.Elements[SectionIndex];
int32 FirstFace = Section.FirstIndex / 3;
int32 LastFace = FirstFace + Section.NumTriangles;
for (int32 i = FirstFace; i < LastFace; ++i)
{
OutRawMesh.FaceMaterialIndices[i] = Section.MaterialIndex;
// Smoothing group information has been lost but is already baked in to the tangent basis.
for (int32 j = 0; j < 3; ++j)
{
OutRawMesh.WedgeIndices[i * 3 + j] = Indices[i * 3 + j];
}
}
}
}
check(OutRawMesh.IsValid());
OutBuildSettings.bRecomputeNormals = false;
OutBuildSettings.bRecomputeTangents = false;
OutBuildSettings.bRemoveDegenerates = false;
OutBuildSettings.bUseFullPrecisionUVs = RenderData.VertexBuffer.GetUseFullPrecisionUVs();
}
static void StaticMeshToSlateRenderData(const UStaticMesh& DataSource, TArray<FSlateMeshVertex>& OutSlateVerts, TArray<uint32>& OutIndexes, FVector2D& OutExtentMin, FVector2D& OutExtentMax )
{
OutExtentMin = FVector2D(FLT_MAX, FLT_MAX);
OutExtentMax = FVector2D(-FLT_MAX, -FLT_MAX);
const FStaticMeshLODResources& LOD = DataSource.RenderData->LODResources[0];
const int32 NumSections = LOD.Sections.Num();
if (NumSections > 1)
{
UE_LOG(LogUMG, Warning, TEXT("StaticMesh %s has %d sections. SMeshWidget expects a static mesh with 1 section."), *DataSource.GetName(), NumSections);
}
else
{
// Populate Vertex Data
{
const uint32 NumVerts = LOD.PositionVertexBuffer.GetNumVertices();
OutSlateVerts.Empty();
OutSlateVerts.Reserve(NumVerts);
static const int32 MAX_SUPPORTED_UV_SETS = 6;
const int32 TexCoordsPerVertex = LOD.GetNumTexCoords();
if (TexCoordsPerVertex > MAX_SUPPORTED_UV_SETS)
{
UE_LOG(LogStaticMesh, Warning, TEXT("[%s] has %d UV sets; slate vertex data supports at most %d"), *DataSource.GetName(), TexCoordsPerVertex, MAX_SUPPORTED_UV_SETS);
}
for (uint32 i = 0; i < NumVerts; ++i)
{
// Copy Position
const FVector& Position = LOD.PositionVertexBuffer.VertexPosition(i);
OutExtentMin.X = FMath::Min(Position.X, OutExtentMin.X);
OutExtentMin.Y = FMath::Min(Position.Y, OutExtentMin.Y);
OutExtentMax.X = FMath::Max(Position.X, OutExtentMax.X);
OutExtentMax.Y = FMath::Max(Position.Y, OutExtentMax.Y);
// Copy Color
FColor Color = (LOD.ColorVertexBuffer.GetNumVertices() > 0) ? LOD.ColorVertexBuffer.VertexColor(i) : FColor::White;
// Copy all the UVs that we have, and as many as we can fit.
const FVector2D& UV0 = (TexCoordsPerVertex > 0) ? LOD.VertexBuffer.GetVertexUV(i, 0) : FVector2D(1, 1);
const FVector2D& UV1 = (TexCoordsPerVertex > 1) ? LOD.VertexBuffer.GetVertexUV(i, 1) : FVector2D(1, 1);
const FVector2D& UV2 = (TexCoordsPerVertex > 2) ? LOD.VertexBuffer.GetVertexUV(i, 2) : FVector2D(1, 1);
const FVector2D& UV3 = (TexCoordsPerVertex > 3) ? LOD.VertexBuffer.GetVertexUV(i, 3) : FVector2D(1, 1);
const FVector2D& UV4 = (TexCoordsPerVertex > 4) ? LOD.VertexBuffer.GetVertexUV(i, 4) : FVector2D(1, 1);
const FVector2D& UV5 = (TexCoordsPerVertex > 5) ? LOD.VertexBuffer.GetVertexUV(i, 5) : FVector2D(1, 1);
OutSlateVerts.Add(FSlateMeshVertex(
FVector2D(Position.X, Position.Y),
Color,
UV0,
UV1,
UV2,
UV3,
UV4,
UV5
));
}
}
// Populate Index data
{
FIndexArrayView SourceIndexes = LOD.IndexBuffer.GetArrayView();
const int32 NumIndexes = SourceIndexes.Num();
OutIndexes.Empty();
OutIndexes.Reserve(NumIndexes);
for (int32 i = 0; i < NumIndexes; ++i)
{
OutIndexes.Add(SourceIndexes[i]);
}
// Sort the index buffer such that verts are drawn in Z-order.
// Assume that all triangles are coplanar with Z == SomeValue.
ensure(NumIndexes % 3 == 0);
for (int32 a = 0; a < NumIndexes; a += 3)
{
for (int32 b = 0; b < NumIndexes; b += 3)
{
const float VertADepth = LOD.PositionVertexBuffer.VertexPosition(OutIndexes[a]).Z;
const float VertBDepth = LOD.PositionVertexBuffer.VertexPosition(OutIndexes[b]).Z;
if ( VertADepth < VertBDepth )
{
// Swap the order in which triangles will be drawn
Swap(OutIndexes[a + 0], OutIndexes[b + 0]);
Swap(OutIndexes[a + 1], OutIndexes[b + 1]);
Swap(OutIndexes[a + 2], OutIndexes[b + 2]);
}
}
}
}
}
}