/**
* Creates a model from the triangles in a static mesh.
*/
void CreateModelFromStaticMesh(UModel* Model,AStaticMeshActor* StaticMeshActor)
{
#if TODO_STATICMESH
UStaticMesh* StaticMesh = StaticMeshActor->StaticMeshComponent->StaticMesh;
FMatrix ActorToWorld = StaticMeshActor->ActorToWorld().ToMatrixWithScale();
Model->Polys->Element.Empty();
const FStaticMeshTriangle* RawTriangleData = (FStaticMeshTriangle*) StaticMesh->LODModels[0].RawTriangles.Lock(LOCK_READ_ONLY);
if(StaticMesh->LODModels[0].RawTriangles.GetElementCount())
{
for(int32 TriangleIndex = 0; TriangleIndex < StaticMesh->LODModels[0].RawTriangles.GetElementCount(); TriangleIndex++)
{
const FStaticMeshTriangle& Triangle = RawTriangleData[TriangleIndex];
FPoly* Polygon = new(Model->Polys->Element) FPoly;
Polygon->Init();
Polygon->iLink = Polygon - Model->Polys->Element.GetData();
Polygon->Material = StaticMesh->LODModels[0].Elements[Triangle.MaterialIndex].Material;
Polygon->PolyFlags = PF_DefaultFlags;
Polygon->SmoothingMask = Triangle.SmoothingMask;
new(Polygon->Vertices) FVector(ActorToWorld.TransformPosition(Triangle.Vertices[2]));
new(Polygon->Vertices) FVector(ActorToWorld.TransformPosition(Triangle.Vertices[1]));
new(Polygon->Vertices) FVector(ActorToWorld.TransformPosition(Triangle.Vertices[0]));
Polygon->CalcNormal(1);
Polygon->Finalize(NULL,0);
FTexCoordsToVectors(Polygon->Vertices[2],FVector(Triangle.UVs[0][0].X * UModel::GetGlobalBSPTexelScale(),Triangle.UVs[0][0].Y * UModel::GetGlobalBSPTexelScale(),1),
Polygon->Vertices[1],FVector(Triangle.UVs[1][0].X * UModel::GetGlobalBSPTexelScale(),Triangle.UVs[1][0].Y * UModel::GetGlobalBSPTexelScale(),1),
Polygon->Vertices[0],FVector(Triangle.UVs[2][0].X * UModel::GetGlobalBSPTexelScale(),Triangle.UVs[2][0].Y * UModel::GetGlobalBSPTexelScale(),1),
&Polygon->Base,&Polygon->TextureU,&Polygon->TextureV);
}
}
StaticMesh->LODModels[0].RawTriangles.Unlock();
Model->Linked = 1;
FBSPOps::bspValidateBrush(Model,0,1);
Model->BuildBound();
#endif // #if TODO_STATICMESH
}
/**
* Rotates the specified brush's vertices.
*/
void FBSPOps::RotateBrushVerts(ABrush* Brush, const FRotator& Rotation, bool bClearComponents)
{
if(Brush->BrushComponent->Brush && Brush->BrushComponent->Brush->Polys)
{
for( int32 poly = 0 ; poly < Brush->BrushComponent->Brush->Polys->Element.Num() ; poly++ )
{
FPoly* Poly = &(Brush->BrushComponent->Brush->Polys->Element[poly]);
// Rotate the vertices.
for( int32 vertex = 0 ; vertex < Poly->Vertices.Num() ; vertex++ )
{
Poly->Vertices[vertex] = Brush->GetPrePivot() + FRotationMatrix( Rotation ).TransformVector( Poly->Vertices[vertex] - Brush->GetPrePivot() );
}
Poly->Base = Brush->GetPrePivot() + FRotationMatrix( Rotation ).TransformVector( Poly->Base - Brush->GetPrePivot() );
// Rotate the texture vectors.
Poly->TextureU = FRotationMatrix( Rotation ).TransformVector( Poly->TextureU );
Poly->TextureV = FRotationMatrix( Rotation ).TransformVector( Poly->TextureV );
// Recalc the normal for the poly.
Poly->Normal = FVector::ZeroVector;
Poly->Finalize(Brush,0);
}
Brush->BrushComponent->Brush->BuildBound();
if( !Brush->IsStaticBrush() )
{
csgPrepMovingBrush( Brush );
}
if ( bClearComponents )
{
Brush->ReregisterAllComponents();
}
}
}
FPoly FPoly::BuildAndCutInfiniteFPoly(const FPlane& InPlane, const TArray<FPlane>& InCutPlanes, ABrush* InOwnerBrush)
{
FPoly PolyMerged = BuildInfiniteFPoly( InPlane );
PolyMerged.Finalize( InOwnerBrush, 1 );
FPoly Front, Back;
int32 result;
for( int32 p = 0 ; p < InCutPlanes.Num() ; ++p )
{
const FPlane* Plane = &InCutPlanes[p];
result = PolyMerged.SplitWithPlane( Plane->GetSafeNormal() * Plane->W, Plane->GetSafeNormal(), &Front, &Back, 1 );
if( result == SP_Split )
{
PolyMerged = Back;
}
}
PolyMerged.Reverse();
return PolyMerged;
}
bool FGeomObject::FinalizeSourceData()
{
if( !GEditorModeTools().IsModeActive(FBuiltinEditorModes::EM_Geometry) )
{
return 0;
}
ABrush* brush = GetActualBrush();
bool Ret = false;
double StartTime = FPlatformTime::Seconds();
const double TimeLimit = 10.0;
// Remove invalid polygons from the brush
for( int32 x = 0 ; x < brush->Brush->Polys->Element.Num() ; ++x )
{
FPoly* Poly = &brush->Brush->Polys->Element[x];
if( Poly->Vertices.Num() < 3 )
{
brush->Brush->Polys->Element.RemoveAt( x );
x = -1;
}
}
for( int32 p = 0 ; p < brush->Brush->Polys->Element.Num() ; ++p )
{
FPoly* Poly = &(brush->Brush->Polys->Element[p]);
Poly->iLink = p;
int32 SaveNumVertices = Poly->Vertices.Num();
const bool bTimeLimitExpired = TimeLimit < FPlatformTime::Seconds() - StartTime;
if( !Poly->IsCoplanar() || !Poly->IsConvex() )
{
// If the polygon is no longer coplanar and/or convex, break it up into separate triangles.
FPoly WkPoly = *Poly;
brush->Brush->Polys->Element.RemoveAt( p );
TArray<FPoly> Polygons;
if( !bTimeLimitExpired && WkPoly.Triangulate( brush, Polygons ) > 0 )
{
FPoly::OptimizeIntoConvexPolys( brush, Polygons );
for( int32 t = 0 ; t < Polygons.Num() ; ++t )
{
brush->Brush->Polys->Element.Add( Polygons[t] );
}
}
p = -1;
Ret = true;
}
else
{
int32 FixResult = Poly->Fix();
if( FixResult != SaveNumVertices )
{
// If the polygon collapses after running "Fix" against it, it needs to be
// removed from the brushes polygon list.
if( bTimeLimitExpired || FixResult == 0 )
{
brush->Brush->Polys->Element.RemoveAt( p );
}
p = -1;
Ret = true;
}
else
{
// If we get here, the polygon is valid and needs to be kept. Finalize its internals.
Poly->Finalize(brush,1);
}
}
}
if (TimeLimit < FPlatformTime::Seconds() - StartTime)
{
UE_LOG(LogEditorGeometry, Error, TEXT("FGeomObject::FinalizeSourceData() failed because it took too long"));
}
brush->ReregisterAllComponents();
return Ret;
}
int32 FPoly::Triangulate( ABrush* InOwnerBrush, TArray<FPoly>& OutTriangles )
{
#if WITH_EDITOR
if( Vertices.Num() < 3 )
{
return 0;
}
FClipSMPolygon Polygon(0);
for( int32 v = 0 ; v < Vertices.Num() ; ++v )
{
FClipSMVertex vtx;
vtx.Pos = Vertices[v];
// Init other data so that VertsAreEqual won't compare garbage
vtx.TangentX = FVector::ZeroVector;
vtx.TangentY = FVector::ZeroVector;
vtx.TangentZ = FVector::ZeroVector;
vtx.Color = FColor(0, 0, 0);
for( int32 uvIndex=0; uvIndex<ARRAY_COUNT(vtx.UVs); ++uvIndex )
{
vtx.UVs[uvIndex] = FVector2D(0.f, 0.f);
}
Polygon.Vertices.Add( vtx );
}
Polygon.FaceNormal = Normal;
// Attempt to triangulate this polygon
TArray<FClipSMTriangle> Triangles;
if( TriangulatePoly( Triangles, Polygon ) )
{
// Create a set of FPolys from the triangles
OutTriangles.Empty();
FPoly TrianglePoly;
for( int32 p = 0 ; p < Triangles.Num() ; ++p )
{
FClipSMTriangle* tri = &(Triangles[p]);
TrianglePoly.Init();
TrianglePoly.Base = tri->Vertices[0].Pos;
TrianglePoly.Vertices.Add( tri->Vertices[0].Pos );
TrianglePoly.Vertices.Add( tri->Vertices[1].Pos );
TrianglePoly.Vertices.Add( tri->Vertices[2].Pos );
if( TrianglePoly.Finalize( InOwnerBrush, 0 ) == 0 )
{
OutTriangles.Add( TrianglePoly );
}
}
}
#endif
return OutTriangles.Num();
}