#include <opennurbs_subd.h>

Inheritance diagram for ON_SubDEdge:

Public Types
enum	: unsigned int { MaximumFaceCount = 0xFFF0U }

Public Member Functions
	ON_SubDEdge ()=default

	ON_SubDEdge (const ON_SubDEdge &)=default

	~ON_SubDEdge ()=default

bool	AddFaceToArray (ON_SubDFacePtr face_ptr)

const ON_SubDEdge *	AdjacentEdge (unsigned int edge_vertex_index, unsigned int i) const

const ON_SubDEdgePtr	AdjacentEdgePtr (unsigned int edge_vertex_index, unsigned int i) const

const ON_BoundingBox	BoundingBox (ON_SubDComponentLocation subd_appearance, const ON_SubD &subd) const

const ON_Plane	CenterFrame (ON_SubDComponentLocation subd_appearance) const

const ON_3dVector	CenterNormal (ON_SubDComponentLocation subd_appearance, unsigned int edge_face_index) const

const ON_3dPoint	CenterPoint (ON_SubDComponentLocation subd_appearance) const

void	ClearSavedSubdivisionPoints () const

void	ClearSavedSubdivisionPoints (bool bClearNeighborhood) const

bool	ClearSharpnessForExperts ()
	This tool is for expert users and internal use. Use ON_SubD::ClearEdgeSharpness() to remove all sharp edges from a SubD. Sets the edge sharpness to ON_EdgeSharpness::Zero. More...

const ON_COMPONENT_INDEX	ComponentIndex () const

const ON_SubDComponentPtr	ComponentPtr () const

const ON_BoundingBox	ControlNetBoundingBox () const

const ON_3dVector	ControlNetCenterNormal (unsigned int edge_face_index) const

const ON_3dPoint	ControlNetCenterPoint () const

const ON_3dVector	ControlNetDirection () const

const ON_3dVector	ControlNetDirectionFrom (const ON_SubDVertex *v) const

const ON_Line	ControlNetLine () const

const ON_3dPoint	ControlNetPoint (unsigned int i) const

unsigned int	DartCount () const

unsigned int	EdgeAttributes () const

unsigned int	EdgeId () const

void	EdgeModifiedNofification () const

ON_NurbsCurve *	EdgeSurfaceCurve (bool bClampEndKnots, ON_NurbsCurve *destination_curve) const

bool	EdgeSurfaceCurveIsSet () const

ON_SubDEdgeType	EdgeType () const
	EdgeType() is typically used to generate text descriptions and in selection filtering. Do not confuse EdgeType() and EdgeTag(). More...

double	EndSharpness (const class ON_SubDVertex *v) const
	Get the edge's sharpness at the end with the specified vertex. See ON_SubDEdge::IsSharp() for more information about sharp edges. More...

double	EndSharpness (unsigned evi) const
	Get the edge's sharpness at the end with the specified vertex. If the edge is a crease, ON_SubDEdgeSharpness::Smooth is returned. See ON_SubDEdge::IsSharp() for more information about sharp edges. More...

double	EndSharpness (unsigned evi, bool bUseCreaseSharpness) const
	Get the edge's sharpness at the end with the specified vertex. See ON_SubDEdge::IsSharp() for more information about sharp edges. More...

bool	EvaluateCatmullClarkSubdivisionPoint (double subdivision_point[3]) const

const class ON_SubDFace *	Face (unsigned int i) const

unsigned int	FaceArrayIndex (const class ON_SubDFace *f) const

unsigned int	FaceCount () const

ON__UINT_PTR	FaceDirection (unsigned int i) const

const ON_SubDFacePtr	FacePtr (unsigned int i) const

const ON_SubDFacePtr	FacePtrFromFace (const class ON_SubDFace *f) const

bool	GetCenterPointAndNormal (ON_SubDComponentLocation subd_appearance, unsigned int edge_face_index, double P, double N) const

unsigned int	GetEdgeSurfaceCurveControlPoints (ON_3dPoint *cvs, size_t cv_capacity) const

unsigned int	GetSectorBoundaryEdges (unsigned int edge_vertex_index, ON_SubDEdgePtr edge_ptr0, ON_SubDEdgePtr edge_ptr1) const

double	GetSharpSubdivisionPoint (ON_3dPoint &sharp_subdivision_point) const
	Gets the edge's sharp subdivision point and returns the average of the edge's sharpnesses. The final subdivision point is (sharpness >= 1.0) ? sharp_subdivision_point : (1.0-sharpness)(smooth subdivsion point)+sharpness*sharp_subdivision_point. See ON_SubDEdge::IsSharp() for more information about sharp edges. More...

bool	GetSubdivisionPoint (double subdivision_point[3]) const

bool	GetSurfaceCenterPointAndNormal (unsigned int edge_face_index, double P, double N) const

unsigned int	GetSurfaceMeshFragmentPoints (ON_3dPoint *P, size_t P_capacity) const

bool	HasBoundaryEdgeTopology () const

bool	HasInteriorEdgeTopology (bool bRequireOppositeFaceDirections) const

bool	IsCrease () const

bool	IsCreaseOrSharp () const
	Crease edges have tag = ON_SubDEdgeTag::Crease. Sharp edges have tag = ON_SubDEdgeTag::Smooth or ON_SubDEdgeTag::SmoothX and have nonzero sharpness. More...

bool	IsDartCrease () const

bool	IsHardCrease () const

bool	IsSharp () const
	Sharp edges are a blend between smooth edges and crease edges. The limit surface has a continuous normal along a sharp edge. A sharp edge has a smooth tag, has sharpness > 0 at at least one end, and has sharpness < ON_SubDEdgeSharpness::MaximumValue at at least one end. Sharpness has no meaning for edges with crease tags. Both sharpness values are zero for an ordinary smooth edge. Edge sharpness steadily decreases during subdivision and becomes zero after at most ON_SubDEdgeSharpness::MaximumValue subdivisions. More...

bool	IsSmooth () const

bool	IsSmoothNotSharp () const
	Determine if an edge is smooth and is not sharp. More...

bool	IsSmoothNotX () const

bool	IsSmoothNotXNotSharp () const
	An expert user function to determine if an edge tag in ON_SubDEdgeTag::Smooth and is not sharp. More...

bool	IsSmoothX () const

unsigned int	MarkedFaceCount () const

unsigned int	MarkedVertexCount () const

const ON_SubDFace *	NeighborFace (const ON_SubDFace *face, bool bStopAtCrease) const

const ON_SubDFacePtr	NeighborFacePtr (const ON_SubDFace *face, bool bStopAtCrease) const

const ON_ComponentStatus	NeighborhoodStatusLogicalOr (bool bIncludeVertices, bool bIncludeFaces) const

ON_SubDEdge &	operator= (const ON_SubDEdge &)=default

const class ON_SubDVertex *	OtherEndVertex (const class ON_SubDVertex *vertex) const

const ON_3dPoint	PointAt (double normalized_edge_parameter, ON_SubDComponentLocation subd_appearance) const

bool	RemoveFaceFromArray (const ON_SubDFace *f)

bool	RemoveFaceFromArray (unsigned int i, ON_SubDFacePtr &removed_face)

unsigned int	ReplaceFaceInArray (const ON_SubDFace old_face, const ON_SubDFace new_face)

void	SetSharpnessForExperts (ON_SubDEdgeSharpness sharpness)
	This tool is for expert users and internal use. A collection of ON_SubD::SetEdgeSharpness() functions provide the easiest way to set and change edge sharpness. Set the edge sharpness values to (sharpness[0],sharpness[1]). The interval values must be >= 0 and <= ON_SubDEdgeSharpness::MaximumValue. See ON_SubDEdge::IsSharp() for more information about sharp edges. More...

const ON_SubDEdgeSharpness	Sharpness (bool bUseCreaseSharpness) const
	Get the edge's sharpness. See ON_SubDEdge::IsSharp() for more information about sharp edges. More...

const ON_SubDEdgeSharpness	SubdivideSharpness (const class ON_SubDVertex *end_vertex, bool bReverseSharpness) const
	Get the edge sharpenss values for the subdivided edge at the specified end of this edge. More...

const ON_SubDEdgeSharpness	SubdivideSharpness (unsigned evi, bool bReverseSharpness) const
	Get the edge sharpenss values for the subdivided edge at the specified end of this edge. More...

const ON_3dPoint	SubdivisionPoint () const
	Get the SubD edge Catmull-Clark subdivision point. More...

const ON_BoundingBox	SurfaceBoundingBox (const ON_SubD &subd) const

const ON_3dVector	SurfaceCenterNormal (unsigned int edge_face_index) const

const ON_3dPoint	SurfaceCenterPoint () const

unsigned int	TaggedEndIndex () const

ON__UINT32	TopologyCRC32 (bool bIncludeSubdivisionProperties) const
	Get a 32 bit CRC that is useful in detecting when an edge's connections to attached vertices or faces have been changed. More...

const ON_SHA1_Hash	TopologyHash (bool bIncludeSubdivisionProperties) const
	Get a SHA-1 hash that is useful in detecting when an edge's connections to attached vertices or faces have been changed. See also ON_SubDEdge::TopologyCRC32() which, in practice, is just as reliable as the hash. More...

bool	Transform (bool bTransformationSavedSubdivisionPoint, const class ON_Xform &xform)

void	UnsetSectorCoefficientsForExperts () const

bool	UpdateEdgeSectorCoefficientsForExperts (bool bUnsetEdgeSectorCoefficientsOnly) const

const class ON_SubDVertex *	Vertex (unsigned evi) const

unsigned int	VertexArrayIndex (const class ON_SubDVertex *v) const

unsigned int	VertexCount () const

unsigned int	VertexId (unsigned evi) const

bool	Write (class ON_BinaryArchive &archive) const

Public Member Functions inherited from ON_SubDComponentBase
	ON_SubDComponentBase ()=default

	ON_SubDComponentBase (const ON_SubDComponentBase &)=default

	~ON_SubDComponentBase ()=default

unsigned int	ArchiveId () const

bool	ClearMark () const

ON__UINT8	ClearMarkBits () const

void	ClearSavedSubdivisionPoint () const

void	ClearSubdivisionDisplacement () const

bool	GetSavedSubdivisionPoint (double subdivision_point[3]) const

bool	GetSubdivisionDisplacement (double *) const

bool	InSymmetrySet () const

bool	IsActive () const

bool	IsSymmetrySetPrimaryMotif () const

bool	Mark () const

ON__UINT8	MarkBits () const

ON_SubDComponentBase &	operator= (const ON_SubDComponentBase &)=default

const ON_3dPoint	SavedSubdivisionPoint () const

bool	SavedSubdivisionPointIsSet () const

void	SetArchiveId (unsigned int archive_id) const

bool	SetMark () const

bool	SetMark (bool bMark) const

ON__UINT8	SetMarkBits (ON__UINT8 mark_bits) const

bool	SetSavedSubdivisionPoint (const double subdivision_point[3]) const

bool	SetSubdivisionDisplacement (const double *)

void	SetSubdivisionLevel (unsigned level)

const ON_ComponentStatus	Status () const

const ON_3dVector	SubdivisionDisplacement () const

bool	SubdivisionDisplacementIsNonzero () const

const unsigned	SubdivisionLevel () const

Static Public Member Functions
static const ON_SubDEdgePtr	FromVertices (const ON_SubDVertex vertex0, const ON_SubDVertex vertex1)

static const ON_SubDEdge *	FromVertices (const ON_SubDVertex vertex0, const ON_SubDVertex vertex1, bool bIgnoreOrientation)

static bool	Read (class ON_BinaryArchive &archive, class ON_SubD &subd, class ON_SubDEdge *&edge)

Static Public Member Functions inherited from ON_SubDComponentBase
static int	CompareId (const ON_SubDComponentBase lhs, const ON_SubDComponentBase rhs)

Public Attributes
ON_SubDEdgeTag	m_edge_tag = ON_SubDEdgeTag::Unset

ON_SubDFacePtr	m_face2 [2] = {}

unsigned short	m_face_count = 0

ON_SubDFacePtr *	m_facex = nullptr

unsigned short	m_facex_capacity = 0

const class ON_SubDEdge *	m_next_edge = nullptr
	linked list of edges on this level More...

const class ON_SubDEdge *	m_prev_edge = nullptr
	m_prev_edge, m_next_edge must be the first data members of ON_SubDEdge More...

double	m_sector_coefficient [2] = {}

const class ON_SubDVertex *	m_vertex [2] = {}

Public Attributes inherited from ON_SubDComponentBase
unsigned int	m_group_id = 0U

unsigned int	m_id = 0

ON_ComponentStatus	m_status = ON_ComponentStatus::NoneSet

const class ON_SubDVertex *	m_subd_point1 = nullptr

Static Public Attributes
static const ON_SubDEdge	Empty

Static Public Attributes inherited from ON_SubDComponentBase
static const ON_SubDComponentBase	Unset

Friends
class	ON_Internal_SubDFaceMeshFragmentAccumulator

class	ON_SubDArchiveIdMap

class	ON_SubDFace

class	ON_SubDHeap

class	ON_SubDVertex

Additional Inherited Members
Protected Types inherited from ON_SubDComponentBase
enum	ModifiedFlags : unsigned char { Modified1Bit = 0x01, Modified2Bit = 0x02, ModifiedFlagsMask = 0x03 }

enum	SavedPointsFlags : unsigned char { SubdivisionPointBit = 0x40, SurfacePointBit = 0x80, CachedPointMask = 0xC0 }

Protected Member Functions inherited from ON_SubDComponentBase
void	CopyBaseFrom (const ON_SubDComponentBase *src, bool bCopySymmetrySetNext)

void	Internal_ClearModifiedFlags () const

void	Internal_ClearSubdivisionPointAndSurfacePointFlags () const

void	Internal_ClearSubdivisionPointFlag () const

void	Internal_ClearSurfacePointFlag () const

bool	Internal_Modified1IsSet () const

bool	Internal_Modified1or2IsSet () const

void	Internal_SetModified1Flag () const

void	Internal_SetModified2Flag () const

void	Internal_SetSavedSurfacePointFlag (bool bSavedSurfacePointFlag) const

bool	Internal_SubdivisionPointFlag () const

bool	Internal_SurfacePointFlag () const

void	Internal_TransformComponentBase (bool bTransformationSavedSubdivisionPoint, const class ON_Xform &xform)

Protected Attributes inherited from ON_SubDComponentBase
unsigned char	m_level = 0U

unsigned char	m_saved_points_flags = 0U

double	m_saved_subd_point1 [3]
	GetSubdivisionPoint( bUseSavedSubdivisionPoint=true ) can change the value of m_cache_subd_P. More...

Detailed Description

ON_SubDEdge

Member Enumeration Documentation

◆ anonymous enum

anonymous enum : unsigned int

Array of m_face_count faces.

The first two are in m_face2[0] and m_face2[1]. When m_face_count > 3, the third and additional faces are in m_facex[0], ..., m_facex[m_face_count-3];

The value of ON_SubDFacePtr.FaceDirection() is 0 if the edge's natural orientation from m_vertex[0] to m_vertex[1] agrees with the face's boundary orientation.

The value of ON_SubDFacePtr.FaceDirection() is 1 if the edge's natural orientation from m_vertex[0] to m_vertex[1] is opposited the face's boundary orientation.

Enumerator
MaximumFaceCount

Constructor & Destructor Documentation

◆ ON_SubDEdge() [1/2]

ON_SubDEdge::ON_SubDEdge ( )

default

◆ ~ON_SubDEdge()

ON_SubDEdge::~ON_SubDEdge ( )

default

◆ ON_SubDEdge() [2/2]

ON_SubDEdge::ON_SubDEdge ( const ON_SubDEdge & )

default

Member Function Documentation

◆ AddFaceToArray()

bool ON_SubDEdge::AddFaceToArray ( ON_SubDFacePtr face_ptr )

Description: Expert user tool to add a face from the edges's face array. Remarks: Does not modify the face. If the edge is not referenced in the face's edge array, then the edge must be inserted in the correct location in the faces array. If you are creating a non-manifold SubD, you must first reserve m_facex[] capacity by calling ON_SubD::GrowEdgeFaceArray().

◆ AdjacentEdge()

const ON_SubDEdge* ON_SubDEdge::AdjacentEdge	(	unsigned int	edge_vertex_index,
		unsigned int	i
	)		const

◆ AdjacentEdgePtr()

const ON_SubDEdgePtr ON_SubDEdge::AdjacentEdgePtr	(	unsigned int	edge_vertex_index,
		unsigned int	i
	)		const

Parameters: edge_vertex_index - [in] 0 or 1 identifying which end of this edge to check. i - [in] Index of the face in this edge's face array. Returns: The edge adjacent to this edge in this->Face(i). The orientation is with respect to this->Face(i).

◆ BoundingBox()

const ON_BoundingBox ON_SubDEdge::BoundingBox	(	ON_SubDComponentLocation	subd_appearance,
		const ON_SubD &	subd
	)		const

◆ CenterFrame()

const ON_Plane ON_SubDEdge::CenterFrame ( ON_SubDComponentLocation subd_appearance ) const

◆ CenterNormal()

const ON_3dVector ON_SubDEdge::CenterNormal	(	ON_SubDComponentLocation	subd_appearance,
		unsigned int	edge_face_index
	)		const

◆ CenterPoint()

const ON_3dPoint ON_SubDEdge::CenterPoint ( ON_SubDComponentLocation subd_appearance ) const

◆ ClearSavedSubdivisionPoints() [1/2]

void ON_SubDEdge::ClearSavedSubdivisionPoints ( ) const

Description: Clears saved subdivision and limit surface information for this edge. Attached vertices and faces are not modified.

◆ ClearSavedSubdivisionPoints() [2/2]

void ON_SubDEdge::ClearSavedSubdivisionPoints ( bool bClearNeighborhood ) const

Description: Clears saved subdivision and limit surface information for this edge. Parameters: bClearNeighborhood - [in] If true, all vertices and faces attached to this edge are also cleared.

◆ ClearSharpnessForExperts()

bool ON_SubDEdge::ClearSharpnessForExperts ( )

This tool is for expert users and internal use. Use ON_SubD::ClearEdgeSharpness() to remove all sharp edges from a SubD. Sets the edge sharpness to ON_EdgeSharpness::Zero.

Returns: True if there were changes to the edge.

◆ ComponentIndex()

const ON_COMPONENT_INDEX ON_SubDEdge::ComponentIndex ( ) const

◆ ComponentPtr()

const ON_SubDComponentPtr ON_SubDEdge::ComponentPtr ( ) const

◆ ControlNetBoundingBox()

const ON_BoundingBox ON_SubDEdge::ControlNetBoundingBox ( ) const

◆ ControlNetCenterNormal()

const ON_3dVector ON_SubDEdge::ControlNetCenterNormal ( unsigned int edge_face_index ) const

◆ ControlNetCenterPoint()

const ON_3dPoint ON_SubDEdge::ControlNetCenterPoint ( ) const

◆ ControlNetDirection()

const ON_3dVector ON_SubDEdge::ControlNetDirection ( ) const

Returns: If vertices are set, then the vector from m_vertex[0]->ControlNetPoint() to m_vertex[1]->ControlNetPoint() is returned. Otherwise ON_3dVector::NanVector is returned.

◆ ControlNetDirectionFrom()

const ON_3dVector ON_SubDEdge::ControlNetDirectionFrom ( const ON_SubDVertex * v ) const

Returns: If vertices are set and v is an end of the edge, then the vector from v to OtherEndVertex(v) is returned. Otherwise ON_3dVector::NanVector is returned.

◆ ControlNetLine()

const ON_Line ON_SubDEdge::ControlNetLine ( ) const

◆ ControlNetPoint()

const ON_3dPoint ON_SubDEdge::ControlNetPoint ( unsigned int i ) const

Parameters: i - [in] 0 or 1. Returns: If i is 0 or 1 and vertex[i] is set, then vertex[i]->ControlNetPoint() is returned. Otherwise ON_3dPoint::NanPoint is returned.

◆ DartCount()

unsigned int ON_SubDEdge::DartCount ( ) const

Returns: 0: end vertices are not tagged as darts 1: one end vertex is tagged as a dart. 2: both end vertices are tagged as a darts.

◆ EdgeAttributes()

unsigned int ON_SubDEdge::EdgeAttributes ( ) const

Returns: bitwise or of applicable ON_ComponentAttributes::EdgeAttributes values. Remarks: ON_ComponentAttributes::EdgeAttributes has subsets of mutually exclusive edge attributes. If the edge is valid, then exactly one bit from each mutually exclusive set of properties will be set. If an edge is not valie, then all bits for a set may be clear. For example, if the edge has nullptr values in m_vertex[] or the vertex control point locations are unset or nan, then neither the ON_ComponentAttributes::EdgeAttributes::Open bit nor ON_ComponentAttributes::EdgeAttributes::Closed bit will be set.

◆ EdgeId()

unsigned int ON_SubDEdge::EdgeId ( ) const

◆ EdgeModifiedNofification()

void ON_SubDEdge::EdgeModifiedNofification ( ) const

Description: Call this function if the edge is modified and it will clear any cached subdivision information that needs to be recalculated.

◆ EdgeSurfaceCurve()

ON_NurbsCurve* ON_SubDEdge::EdgeSurfaceCurve	(	bool	bClampEndKnots,
		ON_NurbsCurve *	destination_curve
	)		const

◆ EdgeSurfaceCurveIsSet()

bool ON_SubDEdge::EdgeSurfaceCurveIsSet ( ) const

◆ EdgeType()

ON_SubDEdgeType ON_SubDEdge::EdgeType ( ) const

EdgeType() is typically used to generate text descriptions and in selection filtering. Do not confuse EdgeType() and EdgeTag().

Returns: If the edge has a valid combination of face count, tag, and sharpness properties, then the corresponding type is returned. Otherwise, ON_SubDEdgeType::Invalid is returned.

◆ EndSharpness() [1/3]

double ON_SubDEdge::EndSharpness ( const class ON_SubDVertex * v ) const

Get the edge's sharpness at the end with the specified vertex. See ON_SubDEdge::IsSharp() for more information about sharp edges.

Parameters

v	Vertex at an end of the edge

Returns

If the edge is sharp, the sharpness at the end with the specified vertex is returned. If the edge is smooth or a crease, 0 is returned. Otherwise, 0.0 is returned.

The sharpness at the end of the edge with the specified vertex.

◆ EndSharpness() [2/3]

double ON_SubDEdge::EndSharpness ( unsigned evi ) const

Get the edge's sharpness at the end with the specified vertex. If the edge is a crease, ON_SubDEdgeSharpness::Smooth is returned. See ON_SubDEdge::IsSharp() for more information about sharp edges.

Parameters

evi	End index (0=start or 1=end).

Returns

If the edge is sharp, the sharpness at the end with the specified by evi is returned. If the edge is smooth or a crease, 0 is returned. Otherwise, 0.0 is returned.

The sharpness at the end of the edge specified by evi.

◆ EndSharpness() [3/3]

double ON_SubDEdge::EndSharpness	(	unsigned	evi,
		bool	bUseCreaseSharpness
	)		const

Get the edge's sharpness at the end with the specified vertex. See ON_SubDEdge::IsSharp() for more information about sharp edges.

Parameters

evi	End index (0=start or 1=end).
bUseCreaseSharpness	If the edge is a crease and bUseCreaseSharpness is false, then ON_SubDEdgeSharpness::Smooth is returned. If the edge is a crease and bUseCreaseSharpness is true, then ON_SubDEdgeSharpness::Crease is returned.

Returns

If the edge is sharp, the sharpness at the end with the specified by evi is returned. If the edge is smooth or a crease, 0 is returned. Otherwise, 0.0 is returned.

The sharpness at the end of the edge specified by evi.

◆ EvaluateCatmullClarkSubdivisionPoint()

bool ON_SubDEdge::EvaluateCatmullClarkSubdivisionPoint ( double subdivision_point[3] ) const

Description: Evaluates the Catmull-Clark subdivision point ignoring all cached information. This function is typically used in testing and debugging code and in ordinary cases, it is faster and better to call SubdivisionPoint() or GetSubdivisionPoint(). Parameters: subdivision_point - [out] The edge Catmull-Clark subdivision point is returned here.

◆ Face()

const class ON_SubDFace* ON_SubDEdge::Face ( unsigned int i ) const

◆ FaceArrayIndex()

unsigned int ON_SubDEdge::FaceArrayIndex ( const class ON_SubDFace * f ) const

◆ FaceCount()

unsigned int ON_SubDEdge::FaceCount ( ) const

◆ FaceDirection()

ON__UINT_PTR ON_SubDEdge::FaceDirection ( unsigned int i ) const

◆ FacePtr()

const ON_SubDFacePtr ON_SubDEdge::FacePtr ( unsigned int i ) const

◆ FacePtrFromFace()

const ON_SubDFacePtr ON_SubDEdge::FacePtrFromFace ( const class ON_SubDFace * f ) const

◆ FromVertices() [1/2]

static const ON_SubDEdgePtr ON_SubDEdge::FromVertices	(	const ON_SubDVertex *	vertex0,
		const ON_SubDVertex *	vertex1
	)

static

◆ FromVertices() [2/2]

static const ON_SubDEdge* ON_SubDEdge::FromVertices	(	const ON_SubDVertex *	vertex0,
		const ON_SubDVertex *	vertex1,
		bool	bIgnoreOrientation
	)

static

Parameters: vertex0 - [in] vertex1 - [in] bIgnoreOrientation - [in] If false, then the returned edge must have vertices (vertex0, vertex1). If true, then the returned edge may have vertices (vertex0, vertex1) or (vertex1, vertex0). Returns: If an edge connects the input vertices, it is returned. Otherwise nullptr is returned.

◆ GetCenterPointAndNormal()

bool ON_SubDEdge::GetCenterPointAndNormal	(	ON_SubDComponentLocation	subd_appearance,
		unsigned int	edge_face_index,
		double *	P,
		double *	N
	)		const

◆ GetEdgeSurfaceCurveControlPoints()

unsigned int ON_SubDEdge::GetEdgeSurfaceCurveControlPoints	(	ON_3dPoint *	cvs,
		size_t	cv_capacity
	)		const

Parameters: cvs - [out] cv_capacity - [in] Capacity of cvs[] array. Pass 0 if you want this function to return the minimum required capacity for this edge without setting cvs. Returns: 0 - failed. >= 4: Number of cvs for a cubic uniform nonrational NURBS curve with (cv_count+2) knots = (-2,-1,0,1,2,3,4,5,6,7,8,9,10).

◆ GetSectorBoundaryEdges()

unsigned int ON_SubDEdge::GetSectorBoundaryEdges	(	unsigned int	edge_vertex_index,
		ON_SubDEdgePtr *	edge_ptr0,
		ON_SubDEdgePtr *	edge_ptr1
	)		const

Parameters: edge_vertex_index - [in] 0 or 1 edge_ptr0 - [out] edge_ptr1 - [out] Crease edges that bound the sector containing this edge. The direction value of the edge pointer identifies the end of the sector boundary edge this->at m_vertex[edge_vertex_index]. Returns: Number of faces in the sector.

◆ GetSharpSubdivisionPoint()

double ON_SubDEdge::GetSharpSubdivisionPoint ( ON_3dPoint & sharp_subdivision_point ) const

Gets the edge's sharp subdivision point and returns the average of the edge's sharpnesses. The final subdivision point is (sharpness >= 1.0) ? sharp_subdivision_point : (1.0-sharpness)(smooth subdivsion point)+sharpness*sharp_subdivision_point. See ON_SubDEdge::IsSharp() for more information about sharp edges.

Parameters

sharp_subdivision_point If the returned sharpness is > 0, then the sharp subdivision point (=edge->ControlNetCenterPoint()) is returned. Otherwise ON_3dPoint::NanPoint is returned.

The relationship between
3d point C = ordinary Catmull-Clark edge subdivision point, 3d point P = sharp_subdivision_point, s = this->GetSharpSubdivisionPoint(P), and 3d point E = this->SubdivisionPoint() is E = (s >= 1.0) ? P : ((s > 0.0) ? (s*P + (1-s)*C) : C);

NOTE WELL: when the returned value is zero, S is ON_3dPoint::NanPoint and any calculation using S will results in nans.

Returns: If the edge is sharp, a value > 0 and < ON_SubDEdgeSharpness::MaximumValue is returned. Otherwise 0.0 is returned and sharp_subdivision_point = ON_3dPoint::NanPoint.

◆ GetSubdivisionPoint()

bool ON_SubDEdge::GetSubdivisionPoint ( double subdivision_point[3] ) const

Parameters: subdivision_point - [out] Returns: true if successful

◆ GetSurfaceCenterPointAndNormal()

bool ON_SubDEdge::GetSurfaceCenterPointAndNormal	(	unsigned int	edge_face_index,
		double *	P,
		double *	N
	)		const

Description: Get the limit surface point location and normal for the edge's midpoint from the limit mesh grid. Parameters: edge - [in] An edge in this SubD. edge_face_index - [in] Index of the face to use for the normal. If the edge is a crease, then each attached face may have a different normal. Pass 0 when in doubt. P - [out] P = limit surface location or ON_3dPoint::NanPoint if not available. N - [out] N = limit surface unit normal or ON_3dVector::NanVector if not available. Returns: True if the point and normal were set from the limit mesh fragment. False if the limit mesh fragment was not found and nan values were returned. Remarks: Requires information created by ON_SubD::UpdateSurfaceMeshCache()

◆ GetSurfaceMeshFragmentPoints()

unsigned int ON_SubDEdge::GetSurfaceMeshFragmentPoints	(	ON_3dPoint *	P,
		size_t	P_capacity
	)		const

Description: Gets the limit esh fragment points for the edge. Parameters: P_capacity - [in] If input 0 = P_capacity, the required capacity is returned, otherwise P_capacity is the capacity of the P[] array P - [out] When P_capacity > 0, the points are returned here. Returns: Number of returned points (0,2,5,5,9,17,33,65)

◆ HasBoundaryEdgeTopology()

bool ON_SubDEdge::HasBoundaryEdgeTopology ( ) const

Parameters: bRequireSameFaceOrientation - [in] If true, the attached faces must use the edge with opposite directions (oriented manifold). Returns: True if the edge has two distinct faces.

◆ HasInteriorEdgeTopology()

bool ON_SubDEdge::HasInteriorEdgeTopology ( bool bRequireOppositeFaceDirections ) const

Parameters: bRequireSameFaceOrientation - [in] If true, the attached faces must use the edge with opposite directions (oriented manifold). Returns: True if the edge has two distinct faces.

◆ IsCrease()

bool ON_SubDEdge::IsCrease ( ) const

Returns: True if m_edge_tag is ON_SubDEdgeTag::Crease.

◆ IsCreaseOrSharp()

bool ON_SubDEdge::IsCreaseOrSharp ( ) const

Crease edges have tag = ON_SubDEdgeTag::Crease. Sharp edges have tag = ON_SubDEdgeTag::Smooth or ON_SubDEdgeTag::SmoothX and have nonzero sharpness.

Returns: (this->IsCrease() || this->IsSharp()).

◆ IsDartCrease()

bool ON_SubDEdge::IsDartCrease ( ) const

Returns: True if m_edge_tag is ON_SubDEdgeTag::Crease and at least one of its end vertices are tagged as ON_SubDVertexTag::Dart.

◆ IsHardCrease()

bool ON_SubDEdge::IsHardCrease ( ) const

Returns: True if m_edge_tag is ON_SubDEdgeTag::Crease and both of its end vertices are tagged as ON_SubDVertexTag::Crease, or ON_SubDVertexTag::Corner.

◆ IsSharp()

bool ON_SubDEdge::IsSharp ( ) const

Sharp edges are a blend between smooth edges and crease edges. The limit surface has a continuous normal along a sharp edge. A sharp edge has a smooth tag, has sharpness > 0 at at least one end, and has sharpness < ON_SubDEdgeSharpness::MaximumValue at at least one end. Sharpness has no meaning for edges with crease tags. Both sharpness values are zero for an ordinary smooth edge. Edge sharpness steadily decreases during subdivision and becomes zero after at most ON_SubDEdgeSharpness::MaximumValue subdivisions.

Returns: True if the edge is tagged as smooth, and has at least one end with sharpness > 0 and < ON_SubDEdgeSharpness::MaximumValue.

◆ IsSmooth()

bool ON_SubDEdge::IsSmooth ( ) const

Returns: True if m_edge_tag is ON_SubDEdgeTag::Smooth or ON_SubDEdgeTag::SmoothX. False in all other cases.

◆ IsSmoothNotSharp()

bool ON_SubDEdge::IsSmoothNotSharp ( ) const

Determine if an edge is smooth and is not sharp.

Returns: (true == IsSmooth() and false == IsSharp())

◆ IsSmoothNotX()

bool ON_SubDEdge::IsSmoothNotX ( ) const

Returns: True if m_edge_tag is ON_SubDEdgeTag::Smooth. Remarks: Expert user function. This is used in rare cases when level 0 edges tagged as ON_SubDEdgeTag::SmoothX need special handling in low level evaluation code. Typical SDK level functions and anything related to runtime user interface should call IsSmooth().

◆ IsSmoothNotXNotSharp()

bool ON_SubDEdge::IsSmoothNotXNotSharp ( ) const

An expert user function to determine if an edge tag in ON_SubDEdgeTag::Smooth and is not sharp.

Returns: (true == IsSmoothNotX() and false == IsSharp())

◆ IsSmoothX()

bool ON_SubDEdge::IsSmoothX ( ) const

Returns: True if m_edge_tag is ON_SubDEdgeTag::SmoothX. Remarks: Expert user function. This is used in rare cases when level 0 edges tagged as ON_SubDEdgeTag::SmoothX need special handling in low level evaluation code. Typical SDK level functions and anything related to runtime user interface should call IsSmooth(). An edge tagged as "X" can occur at level 0. It is subdivided as a smooth vertex and both of its end vertices are tagged as ON_SubDVertexTag::Crease, ON_SubDVertexTag::Corner, or ON_SubDVertexTag::Dart. This tag cannot appear at level N with N >= 1.

◆ MarkedFaceCount()

unsigned int ON_SubDEdge::MarkedFaceCount ( ) const

Returns: Number of faces attached to this edge with Face().m_status.RuntimeMark() = true;

◆ MarkedVertexCount()

unsigned int ON_SubDEdge::MarkedVertexCount ( ) const

Returns: Number of end vertices with Vertex().m_status.RuntimeMark() = true;

◆ NeighborFace()

const ON_SubDFace* ON_SubDEdge::NeighborFace	(	const ON_SubDFace *	face,
		bool	bStopAtCrease
	)		const

Description: Return the neighboring face. Parameters: face - [in] A face referenced in the edge's m_face2[] array. bStopAtCrease - [in] If true and if m_edge_tag = ON_SubDEdgeTag::Crease, then nullptr is returned. Returns: If the m_face_count = 2, m_edge_tag is smooth or x or passes the crease tag test, one of m_face2[0,1] points a face, then the neighboring face is returned. In any other case, nullptr is returned.

◆ NeighborFacePtr()

const ON_SubDFacePtr ON_SubDEdge::NeighborFacePtr	(	const ON_SubDFace *	face,
		bool	bStopAtCrease
	)		const

Description: Return the neighboring face. Parameters: face - [in] A face referenced in the edge's m_face2[] array. bStopAtCrease - [in] If true and if m_edge_tag = ON_SubDEdgeTag::Crease, then nullptr is returned. Returns: If the m_face_count = 2, m_edge_tag is smooth or x or passes the crease tag test, one of m_face2[0,1] points a face, then the neighboring face is returned. In any other case, ON_SubDFacePtr::Null is returned.

◆ NeighborhoodStatusLogicalOr()

const ON_ComponentStatus ON_SubDEdge::NeighborhoodStatusLogicalOr	(	bool	bIncludeVertices,
		bool	bIncludeFaces
	)		const

Parameters: bIncludeVertices - [in] If true, then attached vertices are included. bIncludeFaces - [in] If true, then attached faces are included. Returns: A ON_ComponentStatusLogicalOr() of this vertex's status and the specified attached components. See Also: ON_SubDComponentBase::Status()

◆ operator=()

ON_SubDEdge& ON_SubDEdge::operator= ( const ON_SubDEdge & )

default

◆ OtherEndVertex()

const class ON_SubDVertex* ON_SubDEdge::OtherEndVertex ( const class ON_SubDVertex * vertex ) const

Description: Return the vertex at the other end of the edge. Parameters: vertex - [in] A vertex referenced in the edge's m_vertex[] array. Returns: If vertex is not nullptr and exactly one of m_vertex[] is equal to vertex, then the other m_vertex[] pointer is returned. In any other case, nullptr is returned. See Also: ON_SubDEdge.NeighborFace()

◆ PointAt()

const ON_3dPoint ON_SubDEdge::PointAt	(	double	normalized_edge_parameter,
		ON_SubDComponentLocation	subd_appearance
	)		const

◆ Read()

static bool ON_SubDEdge::Read	(	class ON_BinaryArchive &	archive,
		class ON_SubD &	subd,
		class ON_SubDEdge *&	edge
	)

static

◆ RemoveFaceFromArray() [1/2]

bool ON_SubDEdge::RemoveFaceFromArray ( const ON_SubDFace * f )

Description: Expert user tool to remove a face from the edges's face array. Remarks: Does not modify the face. If the edge is referenced in the face's edge array, then the edge must be removed from the face's edge array.

◆ RemoveFaceFromArray() [2/2]

bool ON_SubDEdge::RemoveFaceFromArray	(	unsigned int	i,
		ON_SubDFacePtr &	removed_face
	)

Description: Expert user tool to remove a face from the edges's face array. Remarks: Does not modify the face. If the edge is referenced in the face's edge array, then the edge must be removed from the face's edge array.

◆ ReplaceFaceInArray()

unsigned int ON_SubDEdge::ReplaceFaceInArray	(	const ON_SubDFace *	old_face,
		const ON_SubDFace *	new_face
	)

Description: Expert user tool to replace reference to old_face with a reference to new_face. Existing orientation is copied. No changes are made to old_face and new_face and their edge references must be updated accordingly. Parameters: old_face = [in] Cannot be nullptr. new_face = [in] If new_face is nullptr, old_face is simply removed. Returns: If the replacement was successful, then the m_faces[] array index where old_face/new_face replacement occurred is returned. Otherwise ON_UNSET_UINT_INDEX is returned. Remarks: No modifications are made to old_face or new_face.

◆ SetSharpnessForExperts()

void ON_SubDEdge::SetSharpnessForExperts ( ON_SubDEdgeSharpness sharpness )

This tool is for expert users and internal use. A collection of ON_SubD::SetEdgeSharpness() functions provide the easiest way to set and change edge sharpness. Set the edge sharpness values to (sharpness[0],sharpness[1]). The interval values must be >= 0 and <= ON_SubDEdgeSharpness::MaximumValue. See ON_SubDEdge::IsSharp() for more information about sharp edges.

Parameters

sharpness End sharpenss values.

◆ Sharpness()

const ON_SubDEdgeSharpness ON_SubDEdge::Sharpness ( bool bUseCreaseSharpness ) const

Get the edge's sharpness. See ON_SubDEdge::IsSharp() for more information about sharp edges.

Parameters

bUseCreaseSharpness If the edge is a crease and bUseCreaseSharpness is false, then ON_SubDEdgeSharpness::Smooth is returned. If the edge is a crease and bUseCreaseSharpness is true, then ON_SubDEdgeSharpness::Crease is returned.

Returns: If the edge is smooth, then the sharpness property is returned. If the edge is a crease and bUseCreaseSharpness is true, then ON_SubDEdgeSharpness::Crease is returned. In all other cases, ON_SubDEdgeSharpness::Smooth is returned.

◆ SubdivideSharpness() [1/2]

const ON_SubDEdgeSharpness ON_SubDEdge::SubdivideSharpness	(	const class ON_SubDVertex *	end_vertex,
		bool	bReverseSharpness
	)		const

Get the edge sharpenss values for the subdivided edge at the specified end of this edge.

Parameters

end_vertex	One of this edge's vertices used to select the subdivided edge.
bReverseSharpness	Pass true if this edge and the subdividied edge will have opposite orientations.

Returns: Edge sharpness for the subdivided edge.

◆ SubdivideSharpness() [2/2]

const ON_SubDEdgeSharpness ON_SubDEdge::SubdivideSharpness	(	unsigned	evi,
		bool	bReverseSharpness
	)		const

Get the edge sharpenss values for the subdivided edge at the specified end of this edge.

Parameters

evi	Selects the subdivided edge (0 for the left subdivided edge, 1 for the right subdivided edge)
bReverseSharpness	Pass true if this edge and the subdividied edge will have opposite orientations.

Returns: Edge sharpness for the subdivided edge.

◆ SubdivisionPoint()

const ON_3dPoint ON_SubDEdge::SubdivisionPoint ( ) const

Get the SubD edge Catmull-Clark subdivision point.

Returns: Catmull-Clark edge subdivision point.

◆ SurfaceBoundingBox()

const ON_BoundingBox ON_SubDEdge::SurfaceBoundingBox ( const ON_SubD & subd ) const

◆ SurfaceCenterNormal()

const ON_3dVector ON_SubDEdge::SurfaceCenterNormal ( unsigned int edge_face_index ) const

Description: Get the limit surface point location and normal for the edge's midpoint from the limit mesh grid. Parameters: edge - [in] An edge in this SubD. edge_face_index - [in] Index of the face to use for the normal. If the edge is a crease, then each attached face may have a different normal. Pass 0 when in doubt. Returns: A unit normal or ON_3dVector::NanVector if information is not available. Remarks: Requires information created by ON_SubD::UpdateSurfaceMeshCache()

◆ SurfaceCenterPoint()

const ON_3dPoint ON_SubDEdge::SurfaceCenterPoint ( ) const

◆ TaggedEndIndex()

unsigned int ON_SubDEdge::TaggedEndIndex ( ) const

Returns: Set bTagged[i] = m_vertex[0]->IsDartOrCreaseOrCorner(). 0: bTagged[0] is true and bTagged[1] is false. 1: bTagged[0] is false and bTagged[1] is true. 2: bTagged[0] and Tagged[1] are both true. 3: bTagged[0] and Tagged[1] are both false.

◆ TopologyCRC32()

ON__UINT32 ON_SubDEdge::TopologyCRC32 ( bool bIncludeSubdivisionProperties ) const

Get a 32 bit CRC that is useful in detecting when an edge's connections to attached vertices or faces have been changed.

Parameters

bIncludeSubdivisionProperties Pass true if you want to include nontopological subdivision properties (tags, sharpnesses, control net points) that help determine the edge's subdivision point in the CRC.

Returns: A 32 bit CRC = this->TopologyHash(bIncludeSubdivisionProperties).CRC32(0).

◆ TopologyHash()

const ON_SHA1_Hash ON_SubDEdge::TopologyHash ( bool bIncludeSubdivisionProperties ) const

Get a SHA-1 hash that is useful in detecting when an edge's connections to attached vertices or faces have been changed. See also ON_SubDEdge::TopologyCRC32() which, in practice, is just as reliable as the hash.

Parameters

bIncludeSubdivisionProperties Pass true if you want to include nontopological subdivision properties (tags, sharpnesses, control net points) that help determine the edge's subdivision point in the hash.

Returns: A SHA-1 hash of the edge's id and the ids of the vertices and faces attached to this edge.

◆ Transform()

bool ON_SubDEdge::Transform	(	bool	bTransformationSavedSubdivisionPoint,
		const class ON_Xform &	xform
	)

Description: Apply a tranxfomration matrix to vertex geometry information.

Parameters: bTransformationSavedSubdivisionPoint - [in] If the transformation is being applied to every vertex, edge and face in every level of a subdivision object, and the transformation is an orientation preserving isometry (rotation, translation, ...), then set bTransformationSavedSubdivisionPoint = true to apply the transformation to saved subdivision and saved limit point information. In all other cases, set bTransformationSavedSubdivisionPoint = false and any saved subdivision points or saved limit points will be deleted. When in doubt, pass false.

xform - [in]

◆ UnsetSectorCoefficientsForExperts()

void ON_SubDEdge::UnsetSectorCoefficientsForExperts ( ) const

Description: Expert user tool to unset sector coefficients.

◆ UpdateEdgeSectorCoefficientsForExperts()

bool ON_SubDEdge::UpdateEdgeSectorCoefficientsForExperts ( bool bUnsetEdgeSectorCoefficientsOnly ) const

Description: Expert user tool to set mutable sector coefficients. Returns: True if values were modified.

◆ Vertex()

const class ON_SubDVertex* ON_SubDEdge::Vertex ( unsigned evi ) const

Parameters: evi - [in] 0 or 1 Returns: If evi is 0 or 1, then m_vertex[evi] is returned. Otherwise nullptr is returned.

◆ VertexArrayIndex()

unsigned int ON_SubDEdge::VertexArrayIndex ( const class ON_SubDVertex * v ) const

◆ VertexCount()

unsigned int ON_SubDEdge::VertexCount ( ) const

Returns: Number of distinct non-nullptr vertices. If the edge is valid, this will be 2.

◆ VertexId()

unsigned int ON_SubDEdge::VertexId ( unsigned evi ) const

Parameters: evi - [in] 0 or 1 Returns: If evi is 0 or 1 and m_vertex[evi] is not nullptr, then m_vertex[evi]->m_id is returned. Otherwise 0 i returned.

◆ Write()

bool ON_SubDEdge::Write ( class ON_BinaryArchive & archive ) const

Friends And Related Function Documentation

◆ ON_Internal_SubDFaceMeshFragmentAccumulator

friend class ON_Internal_SubDFaceMeshFragmentAccumulator

friend

◆ ON_SubDArchiveIdMap

friend class ON_SubDArchiveIdMap

friend

◆ ON_SubDFace

friend class ON_SubDFace

friend

◆ ON_SubDHeap

friend class ON_SubDHeap

friend

◆ ON_SubDVertex

friend class ON_SubDVertex

friend

Member Data Documentation

◆ Empty

const ON_SubDEdge ON_SubDEdge::Empty

static

◆ m_edge_tag

ON_SubDEdgeTag ON_SubDEdge::m_edge_tag = ON_SubDEdgeTag::Unset

When checking the edge tag, it is important to consider what should happen in the ON_SubDEdgeTag::SmoothX case. It is strongly suggested that you use the member functions ON_SubDEdge::IsSmooth() and ON_SubDEdge::IsCrease() instead of comparing m_edge_tag to ON_SubDEdgeTag values.

◆ m_face2

ON_SubDFacePtr ON_SubDEdge::m_face2[2] = {}

◆ m_face_count

unsigned short ON_SubDEdge::m_face_count = 0

◆ m_facex

ON_SubDFacePtr* ON_SubDEdge::m_facex = nullptr

◆ m_facex_capacity

unsigned short ON_SubDEdge::m_facex_capacity = 0

◆ m_next_edge

const class ON_SubDEdge* ON_SubDEdge::m_next_edge = nullptr

linked list of edges on this level

◆ m_prev_edge

const class ON_SubDEdge* ON_SubDEdge::m_prev_edge = nullptr

m_prev_edge, m_next_edge must be the first data members of ON_SubDEdge

linked list of edges on this level

◆ m_sector_coefficient

double ON_SubDEdge::m_sector_coefficient[2] = {}

mutable

NOTE: The sector coefficient is a property of a smooth edge end that is constant throughout subdivision. It exists at ends of smooth edges that are attached to dart, crease, or corner vertices. In all other cases the sector coefficient is ignored. In particular crease edges and the ends of smooth edges attached to smooth vertices do not have a sector coefficient.

The ON_SubDSectorType class provides three static functions that calculate sector coefficients: ON_SubDSectorType::DartSectorCoefficient() ON_SubDSectorType::CreaseSectorCoefficient() ON_SubDSectorType::CornerSectorCoefficient()

If the value of vertex->m_vertex_tag is not ON_SubDVertexTag::Smooth, then that vertex is "tagged".

If the value of m_edge_tag is ON_SubDEdgeTag::Crease, then m_sector_coefficient[] should be {0,0}.
In any case m_sector_coefficient[] values are ignored and the midpoint of the edge is the location of the edge.s subdivision point. The edge's subdivision vertex will be tagged as ON_SubDVertexTag::Crease and both subdivision edges will be tagged as ON_SubDEdgeTag::Crease.

If the value of m_edge_tag is ON_SubDEdgeTag::Smooth and neither end vertex is tagged, then m_sector_coefficient[] should be {0,0}.
In any case m_sector_coefficient[] values are ignored on smooth edges with smooth vertices at both ends. The edge's subdivision vertex will be tagged as ON_SubDVertexTag::Smooth and both subdivision edges will be tagged as ON_SubDEdgeTag::Smooth.

If the value of m_edge_tag is ON_SubDEdgeTag::Smooth and exactly one end vertex is tagged, then the m_sector_coefficient[] value for the tagged end is calculated by ON_SubDSectorType::SectorCoefficient(). tagged_coefficient*tagged_vertex + (1.0 - tagged_coefficient)*untagged_vertex is used when combining the edge ends. The edge's subdivision vertex will be tagged as ON_SubDVertexTag::Smooth and both subdivision edges will be tagged as ON_SubDEdgeTag::Smooth.

If the value of m_edge_tag is ON_SubDEdgeTag::SmoothX, then the edge must have exactly two neighboring faces, both vertices must be tagged and the m_sector_coefficient[] values are calculated by ON_SubDSectorType::SectorCoefficient(). When the edge is subdivided, the midpoint of the edge is the location of the edge.s subdivision point. The edge's subdivision vertex will be tagged as ON_SubDVertexTag::Smooth and both subdivision edges will be tagged as ON_SubDEdgeTag::Smooth.

If the value of m_edge_tag is ON_SubDEdgeTag::Smooth and both end vertices are tagged, that is a severe error condition and the edge is subdivided at its midpoint.

If the value of m_edge_tag is ON_SubDEdgeTag::SmoothX and both end vertices are not tagged, that is a severe error condition and the edge is subdivided at its midpoint.

m_sector_coefficient[tagged_end] = 1/2 + 1/3*cos(theta_k) where "theta_k" is the tagged end's "theta_k", which depends on the vertex tag (dart/crease/corner), the number of faces k in the sector, and the control net crease angle alpha when the tagged end is a corner. Dart: theta_k = 2 * Pi / k Crease: theta_k = Pi / k Corner: theta_k = alpha / k

The name "sector coefficient" is used because the value is a property of the vertex's sector (every smooth edge inside a vertex sector has the same value at the tagged vertex). The sector coefficient does not change which a subdivision is applied.

2022-02-09, Pierre C, RH-67377

Wrong values in 3dm files created by OpenNURBS 7.16 and before, fixed in 7.17.

Since 2015-02-20, ON_SubDSectorType::CornerSectorThetaFromCornerAngle(unsigned int sector_face_count, double corner_sector_angle_radians) had been incorrectly computing theta as: corner_sector_theta = corner_sector_angle_radians / (2 * sector_face_count) instead of: corner_sector_theta = corner_sector_angle_radians / sector_face_count.

This is fixed as of Rhino 7.17, but 3dm files created before this version saved the incorrect value.

This changes the coefficients saved in the SubD edge, and in the 3dm files. Rhino recomputes all m_sector_coefficients cached in the SubD edges when adding a SubD to a document, so all values are now correct. This changes SubD subdivision, meshing, limit surface, and limit point editing results, for SubDs that have a smooth edge connected to a corner vertex.

If you are using this value from a SubD in a 3dm file created by Rhino 7.16 or earlier, without adding the SubD to a Rhino document using CRhinoSubDObject::SetSubD(ON_SubDRef subd_ref), you need to recompute all sector coefficients using subd->UpdateAllTagsAndSectorCoefficients(true);

◆ m_vertex

const class ON_SubDVertex* ON_SubDEdge::m_vertex[2] = {}

m_vertex[0] = vertex at the start of the edge. m_vertex[1] = vertex at the end of the edge.

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ ON_SubDEdge() [1/2]

◆ ~ON_SubDEdge()

◆ ON_SubDEdge() [2/2]

Member Function Documentation

◆ AddFaceToArray()

◆ AdjacentEdge()

◆ AdjacentEdgePtr()

◆ BoundingBox()

◆ CenterFrame()

◆ CenterNormal()

◆ CenterPoint()

◆ ClearSavedSubdivisionPoints() [1/2]

◆ ClearSavedSubdivisionPoints() [2/2]

◆ ClearSharpnessForExperts()

◆ ComponentIndex()

◆ ComponentPtr()

◆ ControlNetBoundingBox()

◆ ControlNetCenterNormal()

◆ ControlNetCenterPoint()

◆ ControlNetDirection()

◆ ControlNetDirectionFrom()

◆ ControlNetLine()

◆ ControlNetPoint()

◆ DartCount()

◆ EdgeAttributes()

◆ EdgeId()

◆ EdgeModifiedNofification()

◆ EdgeSurfaceCurve()

◆ EdgeSurfaceCurveIsSet()

◆ EdgeType()

◆ EndSharpness() [1/3]

◆ EndSharpness() [2/3]

◆ EndSharpness() [3/3]

◆ EvaluateCatmullClarkSubdivisionPoint()

◆ Face()

◆ FaceArrayIndex()

◆ FaceCount()

◆ FaceDirection()

◆ FacePtr()

◆ FacePtrFromFace()

◆ FromVertices() [1/2]

◆ FromVertices() [2/2]

◆ GetCenterPointAndNormal()

◆ GetEdgeSurfaceCurveControlPoints()

◆ GetSectorBoundaryEdges()

◆ GetSharpSubdivisionPoint()

◆ GetSubdivisionPoint()

◆ GetSurfaceCenterPointAndNormal()

◆ GetSurfaceMeshFragmentPoints()

◆ HasBoundaryEdgeTopology()

◆ HasInteriorEdgeTopology()

◆ IsCrease()

◆ IsCreaseOrSharp()

◆ IsDartCrease()

◆ IsHardCrease()

◆ IsSharp()

◆ IsSmooth()

◆ IsSmoothNotSharp()

◆ IsSmoothNotX()

◆ IsSmoothNotXNotSharp()

◆ IsSmoothX()

◆ MarkedFaceCount()

◆ MarkedVertexCount()

◆ NeighborFace()

◆ NeighborFacePtr()

◆ NeighborhoodStatusLogicalOr()

◆ operator=()

◆ OtherEndVertex()

◆ PointAt()