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Implicit

API > API/Runtime > API/Runtime/GeometryCore

Classes

  Type Name Description
Public class FWindingNumberBasedSolidify Use marching cubes to remesh an arbitrary function that provides a winding-number like scalar value to a solid surface  
Public struct TBoundedImplicitFunction3    
Public class TCachingMeshSDF This is variant of TSweepingMeshSDF that does lazy evaluation of actual Distances, using mesh spatial data structure.  
Public struct TDistanceFieldToSkeletalField This class converts the interval [-falloff,falloff] to [0,1], Then applies Wyvill falloff function (1-t^2)^3.  
Public class TImplicitBlend    
Public struct TImplicitFunction3    
Public struct TImplicitLine3 Implicit Distance-Field Line Object/Primitive, surface shape at isovalue=0 (defined by Distance-Radius) is a capsule  
Public class TImplicitMorphology    
Public struct TImplicitPoint3 Implicit Distance-Field Point Object/Primitive, surface shape at isovalue=0 (defined by Distance-Radius) is a sphere  
Public class TImplicitSolidify Use marching cubes to remesh a triangle mesh to a solid surface Uses fast winding number to decide what is inside vs outside  
Public struct TSkeletalImplicitLine3 Skeletal implicit line primitive.  
Public struct TSkeletalRicciNaryBlend3 Boolean Union of N implicit functions (F_1 or F_2 or ... or F_N) Or if bSubtract=true, Subtraction: (F_1 - (F_2 or F_3 or ... or F_N)) We expect this to be used with "Skeletal Field" inputs (e.g. TDistanceFieldToSkeletalField, TSkeletalImplicitLine3, etc) where values are in the range [0,1] and the isosurface is ~ in the middle of that range  
Public class TSparseNarrowBandMeshSDF Compute discretely-sampled (ie gridded) signed distance field for a mesh within a specified narrow band.  
Public class TSweepingMeshSDF Compute discretely-sampled (ie gridded) signed distance field for a mesh The basic approach is, first compute exact Distances in a narrow band, and then extend out to rest of Grid using fast "sweeping" (ie like a distance transform).  
Public class TTriLinearGridInterpolant Tri-linear interpolant for a 3D dense Grid.  

Typedefs

Name Description
FImplicitLine3d  
FImplicitLine3f  
FImplicitPoint3d  
FImplicitPoint3f  
FSkeletalImplicitLine3d  
FSkeletalImplicitLine3f  

Functions

  Type Name Description
Public function int

UE::Geometry::Orientation ( RealType X1,
RealType Y1,
RealType X2,
RealType Y2,
RealType& TwiceSignedArea
)

 Calculate twice signed area of triangle (0,0)-(X1,Y1)-(X2,Y2) return an SOS-determined sign (-1, +1, or 0 only if it's a truly degenerate triangle)
Public function bool

UE::Geometry::PointInTriangle2d ( double X0,
double Y0,
double X1,
double Y1,
double X2,
double Y2,
double X3,
double Y3,
double& A,
double& B,
double& C
)

  
Public function RealType

UE::Geometry::PointSegmentDistance ( const TVector< RealType >& x0,
const TVector< RealType >& x1,
const TVector< RealType >& x2
)

 Find distance x0 is from segment x1-x2
Public function double

UE::Geometry::PointTriangleDistance ( const FVector3d& x0,
const FVector3d& x1,
const FVector3d& x2,
const FVector3d& x3
)

 These are utility functions shared by the various SDF calculation implementations (CachingMeshSDF, SweepignMeshSDF, SparseNarrowBandMeshSDF)
Public function float

UE::Geometry::PointTriangleDistance ( const FVector3f& x0,
const FVector3f& x1,
const FVector3f& x2,
const FVector3f& x3
)

  

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