#include <opennurbs_polycurve.h>

Inheritance diagram for ON_PolyCurve:

Public Member Functions
	ON_PolyCurve () ON_NOEXCEPT

	ON_PolyCurve (const ON_PolyCurve &)

	ON_PolyCurve (int)

virtual	~ON_PolyCurve ()

bool	Append (ON_Curve *)
	Append curve. More...

bool	AppendAndMatch (ON_Curve *)
	Append and match start of curve to end of polycurve. More...

bool	ChangeClosedCurveSeam (double t) override

bool	ChangeDimension (int desired_dimension) override

bool	CloseGap (int gap_index, int segments_to_modify)

int	CloseGaps ()

int	Count () const
	Interface. More...

ON__UINT32	DataCRC (ON__UINT32 current_remainder) const override
	virtual ON_Object::DataCRC override More...

int	Degree () const override

void	Destroy ()
	of the number of segments is known. More...

void	DestroyRuntimeCache (bool bDelete=true) override
	virtual ON_Object::DestroyRuntimeCache override More...

int	Dimension () const override
	ON_Geometry overrides. More...

ON_Interval	Domain () const override

void	Dump (ON_TextLog &) const override
	for debugging More...

ON_Curve *	DuplicateCurve () const override
	ON_Curve overrides. More...

void	EmergencyDestroy ()
	call if memory used by ON_PolyCurve becomes invalid More...

bool	Evaluate (double, int, int, double , int=0, int =0) const override

bool	EvaluatePoint (const class ON_ObjRef &objref, ON_3dPoint &P) const override
	virtual ON_Geometry override More...

ON_Curve *	ExplodeSingleSegmentCurve () const

bool	Extend (const ON_Interval &domain) override

int	FindNextGap (int segment_index0) const

ON_Curve *	FirstSegmentCurve () const
	returns nullptr if count = 0 More...

bool	GetBBox (double boxmin, double boxmax, bool bGrowBox=false) const override
	virtual ON_Geometry GetBBox override More...

bool	GetClosestPoint (const ON_3dPoint &, double , double=0.0, const ON_Interval =nullptr) const override

bool	GetCurveParameterFromNurbFormParameter (double, double *) const override
	virtual ON_Curve::GetCurveParameterFromNurbFormParameter override More...

bool	GetLength (double , double=1.0e-8, const ON_Interval =nullptr) const override

bool	GetLocalClosestPoint (const ON_3dPoint &, double, double , const ON_Interval =nullptr) const override

bool	GetNextDiscontinuity (ON::continuity c, double t0, double t1, double t, int hint=nullptr, int *dtype=nullptr, double cos_angle_tolerance=ON_DEFAULT_ANGLE_TOLERANCE_COSINE, double curvature_tolerance=ON_SQRT_EPSILON) const override

bool	GetNormalizedArcLengthPoint (double s, double t, double fractional_tolerance=1.0e-8, const ON_Interval sub_domain=nullptr) const override

bool	GetNormalizedArcLengthPoints (int count, const double s, double t, double absolute_tolerance=0.0, double fractional_tolerance=1.0e-8, const ON_Interval *sub_domain=nullptr) const override

int	GetNurbForm (ON_NurbsCurve &, double=0.0, const ON_Interval *=nullptr) const override

bool	GetNurbFormParameterFromCurveParameter (double, double *) const override
	virtual ON_Curve::GetNurbFormParameterFromCurveParameter override More...

bool	GetSpanVector (double *) const override

bool	GetTightBoundingBox (class ON_BoundingBox &tight_bbox, bool bGrowBox=false, const class ON_Xform *xform=nullptr) const override
	virtual ON_Geometry GetTightBoundingBox override More...

ON_Curve *	HarvestSegment (int)

int	HasGap () const

bool	HasGapAt (int segment_index) const

int	HasNurbForm () const override

bool	HasSynchronizedSegmentDomains () const

bool	Insert (int, ON_Curve *)

bool	IsArc (const ON_Plane =nullptr, ON_Arc =nullptr, double=ON_ZERO_TOLERANCE) const override

bool	IsClosed (void) const override

bool	IsContinuous (ON::continuity c, double t, int *hint=nullptr, double point_tolerance=ON_ZERO_TOLERANCE, double d1_tolerance=ON_ZERO_TOLERANCE, double d2_tolerance=ON_ZERO_TOLERANCE, double cos_angle_tolerance=ON_DEFAULT_ANGLE_TOLERANCE_COSINE, double curvature_tolerance=ON_SQRT_EPSILON) const override

bool	IsDeformable () const override
	virtual ON_Geometry::IsDeformable() override More...

bool	IsInPlane (const ON_Plane &, double=ON_ZERO_TOLERANCE) const override

bool	IsLinear (double=ON_ZERO_TOLERANCE) const override

bool	IsMorphable () const override
	virtual ON_Geometry override More...

bool	IsNested () const

bool	IsPeriodic (void) const override
	periodic.) More...

bool	IsPlanar (ON_Plane *=nullptr, double=ON_ZERO_TOLERANCE) const override

int	IsPolyline (ON_SimpleArray< ON_3dPoint > pline_points=nullptr, ON_SimpleArray< double > pline_t=nullptr) const override

bool	IsShort (double tolerance, const ON_Interval sub_domain=0, double length_estimate=0) const override

bool	IsValid (bool bAllowGaps, ON_TextLog *text_log) const

bool	IsValid (class ON_TextLog *text_log=nullptr) const override

ON_Curve *	LastSegmentCurve () const
	returns nullptr if count = 0 More...

bool	MakeDeformable () override
	virtual ON_Geometry::MakeDeformable() override More...

bool	Morph (const ON_SpaceMorph &morph) override
	virtual ON_Geometry override More...

ON_PolyCurve &	operator= (const ON_PolyCurve &)

ON_Curve *	operator[] (int) const
	These operator[] functions return nullptr if index is out of range. More...

bool	ParameterSearch (double t, int &index, bool bEnableSnap) const

double	PolyCurveParameter (int segment_index, double segmentcurve_parameter) const

bool	Prepend (ON_Curve *)
	Prepend curve. More...

bool	PrependAndMatch (ON_Curve *)
	Prepend and match end of curve to start of polycurve. More...

bool	Read (ON_BinaryArchive &) override

bool	Remove ()
	delete last segment and reduce count by 1 More...

bool	Remove (int)
	delete specified segment and reduce count by 1 More...

bool	RemoveNesting ()

bool	RemoveNestingEx ()

bool	RemoveShortSegments (double tolerance, bool bRemoveShortSegments=true) override

void	Reserve (int)
	make sure capacity is at least the specified count More...

bool	Reverse () override

void	SanitizeDomain ()

ON_Curve *	SegmentCurve (int segment_index) const

double	SegmentCurveParameter (double polycurve_parameter) const

const ON_CurveArray &	SegmentCurves () const

ON_Interval	SegmentDomain (int segment_index) const

int	SegmentIndex (double polycurve_parameter) const

int	SegmentIndex (ON_Interval sub_domain, int segment_index0, int segment_index1) const

const ON_SimpleArray< double > &	SegmentParameters () const

bool	SetDomain (double t0, double t1) override

bool	SetEndPoint (ON_3dPoint end_point) override
	virtual More...

bool	SetParameterization (const double *t)

void	SetSegment (int index, ON_Curve *crv)

bool	SetStartPoint (ON_3dPoint start_point) override
	Domain changes from [a,b] to [-b,-a]. More...

unsigned int	SizeOf () const override
	ON_Object overrides. More...

int	SpanCount () const override
	number of smooth spans in curve More...

bool	Split (double t, ON_Curve &left_side, ON_Curve &right_side) const override

bool	SwapCoordinates (int, int) override

bool	SynchronizeSegmentDomains ()

bool	Transform (const ON_Xform &) override

bool	Trim (const ON_Interval &domain) override

bool	Write (ON_BinaryArchive &) const override

Public Member Functions inherited from ON_Curve
	ON_Curve () ON_NOEXCEPT

	ON_Curve (const ON_Curve &)

virtual	~ON_Curve ()

bool	AreaMassProperties (ON_3dPoint base_point, ON_3dVector plane_normal, ON_MassProperties &mp, bool bArea=true, bool bFirstMoments=true, bool bSecondMoments=true, bool bProductMoments=true, double rel_tol=1.0e-6, double abs_tol=1.0e-6) const

bool	ChangeClosedCurveSeam (double t, double min_dist)

virtual class ON_CurveTree *	CreateCurveTree () const

ON_3dVector	CurvatureAt (double t) const

const class ON_CurveTree *	CurveTree () const

ON_3dVector	DerivativeAt (double t) const

void	DestroyCurveTree ()

bool	Ev1Der (double t, ON_3dPoint &point, ON_3dVector &first_derivative, int side=0, int *hint=0) const

bool	Ev2Der (double t, ON_3dPoint &point, ON_3dVector &first_derivative, ON_3dVector &second_derivative, int side=0, int *hint=0) const

bool	EvCurvature (double t, ON_3dPoint &point, ON_3dVector &tangent, ON_3dVector &kappa, int side=0, int *hint=0) const

bool	EvPoint (double t, ON_3dPoint &point, int side=0, int *hint=0) const

bool	EvSignedCurvature (double t, ON_3dPoint &point, ON_3dVector &tangent, double &kappa, const ON_3dVector normal=nullptr, int side=0, int hint=0) const

bool	EvTangent (double t, ON_3dPoint &point, ON_3dVector &tangent, int side=0, int *hint=0) const

bool	FirstSpanIsLinear (double min_length, double tolerance) const

bool	FirstSpanIsLinear (double min_length, double tolerance, ON_Line *span_line) const

bool	FrameAt (double t, ON_Plane &plane) const

bool	GetDomain (double t0, double t1) const
	curve interface More...

virtual bool	GetParameterTolerance (double t, double tminus, double tplus) const

virtual bool	GetSpanVectorIndex (double t, int side, int span_vector_index, ON_Interval span_domain) const

int	IntersectCurve (const ON_Curve curveB, ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, double overlap_tolerance=0.0, const ON_Interval curveA_domain=0, const ON_Interval *curveB_domain=0) const

int	IntersectPlane (ON_PlaneEquation plane_equation, ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, double overlap_tolerance=0.0, const ON_Interval *curve_domain=0) const

virtual int	IntersectSelf (ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, const ON_Interval *curve_domain=0) const

int	IntersectSurface (const ON_Surface surfaceB, ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, double overlap_tolerance=0.0, const ON_Interval curveA_domain=0, const ON_Interval surfaceB_udomain=0, const ON_Interval surfaceB_vdomain=0) const

bool	IsArcAt (double t, const ON_Plane plane=0, ON_Arc arc=0, double tolerance=ON_ZERO_TOLERANCE, double t0=0, double t1=0) const

bool	IsClosable (double tolerance, double min_abs_size=0.0, double min_rel_size=10.0) const

virtual bool	IsEllipse (const ON_Plane plane=nullptr, ON_Ellipse ellipse=nullptr, double tolerance=ON_ZERO_TOLERANCE) const

bool	LastSpanIsLinear (double min_length, double tolerance) const

bool	LastSpanIsLinear (double min_length, double tolerance, ON_Line *span_line) const

bool	LengthMassProperties (class ON_MassProperties &mp, bool bLength=true, bool bFirstMoments=true, bool bSecondMoments=true, bool bProductMoments=true, double rel_tol=1.0e-6, double abs_tol=1.0e-6) const

class ON_PolylineCurve *	MeshCurve (ON_MeshCurveParameters &mp, ON_PolylineCurve polyline, bool bSkipFirstPoint, const ON_Interval domain) const

ON_NurbsCurve *	NurbsCurve (ON_NurbsCurve pNurbsCurve=nullptr, double tolerance=0.0, const ON_Interval subdomain=nullptr) const

ON::object_type	ObjectType () const override

ON_Curve &	operator= (const ON_Curve &)

ON_3dPoint	PointAt (double t) const

ON_3dPoint	PointAtEnd () const

ON_3dPoint	PointAtStart () const

bool	SetDomain (ON_Interval domain)

double	SignedCurvatureAt (double t, const ON_3dVector *plane_normal=nullptr) const

const ON_SimpleArray< double >	SpanVector () const
	The curve's span vector is a stricltly monotone increasing list of doubles that are the intervals on which the curve is C-infinity. More...

ON_3dVector	TangentAt (double t) const

Public Member Functions inherited from ON_Geometry
	ON_Geometry ()=default

	ON_Geometry (const ON_Geometry &)=default

	~ON_Geometry ()=default

ON_BoundingBox	BoundingBox () const

virtual class ON_Brep *	BrepForm (class ON_Brep *brep=nullptr) const

virtual void	ClearBoundingBox ()

virtual ON_COMPONENT_INDEX	ComponentIndex () const

bool	GetBoundingBox (ON_3dPoint &bbox_min, ON_3dPoint &bbox_max, bool bGrowBox=false) const

bool	GetBoundingBox (ON_BoundingBox &bbox, bool bGrowBox=false) const

virtual bool	HasBrepForm () const

virtual bool	Morph (const class ON_SpaceMorph &morph)

ON_Geometry &	operator= (const ON_Geometry &)=default

bool	Rotate (double rotation_angle, const ON_3dVector &rotation_axis, const ON_3dPoint &rotation_center)

bool	Rotate (double sin_angle, double cos_angle, const ON_3dVector &rotation_axis, const ON_3dPoint &rotation_center)

bool	Scale (double scale_factor)

const ON_BoundingBox	TightBoundingBox () const

bool	Translate (const ON_3dVector &translation_vector)

Public Member Functions inherited from ON_Object
	ON_Object () ON_NOEXCEPT

	ON_Object (const ON_Object &)

virtual	~ON_Object ()

virtual ON_AggregateComponentStatus	AggregateComponentStatus () const

bool	AttachUserData (class ON_UserData *pUserData)

unsigned int	ClearAllComponentStates () const

virtual unsigned int	ClearComponentStates (ON_COMPONENT_INDEX component_index, ON_ComponentStatus states_to_clear) const

virtual unsigned int	ClearComponentStates (ON_ComponentStatus states_to_clear) const

void	CopyUserData (const ON_Object &source_object)

unsigned int	CopyUserData (const ON_Object &source_object, ON_UUID source_userdata_item_id, ON_Object::UserDataConflictResolution userdata_conflict_resolution)

virtual bool	DeleteComponents (const ON_COMPONENT_INDEX *ci_list, size_t ci_count)

bool	DetachUserData (class ON_UserData *pUserData)

void	EmergencyDestroy ()

class ON_UserData *	FirstUserData () const

virtual unsigned int	GetComponentsWithSetStates (ON_ComponentStatus states_filter, bool bAllEqualStates, ON_SimpleArray< ON_COMPONENT_INDEX > &components) const

class ON_UserData *	GetUserData (const ON_UUID &userdata_uuid) const

bool	GetUserString (const wchar_t *key, ON_wString &string_value) const

int	GetUserStringKeys (ON_ClassArray< ON_wString > &user_string_keys) const

int	GetUserStrings (ON_ClassArray< ON_UserString > &user_strings) const

bool	IsCorrupt (bool bRepair, bool bSilentError, class ON_TextLog *text_log) const

bool	IsKindOf (const ON_ClassId *pClassId) const

virtual void	MarkAggregateComponentStatusAsNotCurrent () const

virtual void	MemoryRelocate ()

virtual ON_UUID	ModelObjectId () const

void	MoveUserData (ON_Object &source_object)

unsigned int	MoveUserData (ON_Object &source_object, ON_UUID source_userdata_item_id, ON_Object::UserDataConflictResolution userdata_conflict_resolution, bool bDeleteAllSourceItems)

ON_Object &	operator= (const ON_Object &)

void	PurgeUserData ()

virtual unsigned int	SetComponentStates (ON_COMPONENT_INDEX component_index, ON_ComponentStatus states_to_set) const

virtual unsigned int	SetComponentStatus (ON_COMPONENT_INDEX component_index, ON_ComponentStatus status_to_copy) const

bool	SetUserString (const wchar_t key, const wchar_t string_value)

int	SetUserStrings (int count, const ON_UserString *user_strings, bool bReplace)

bool	ThisIsNullptr (bool bSilentError) const

void	TransformUserData (const class ON_Xform &xform)

virtual bool	UpdateReferencedComponents (const class ON_ComponentManifest &source_manifest, const class ON_ComponentManifest &destination_manifest, const class ON_ManifestMap &manifest_map)

int	UserStringCount () const

Additional Inherited Members
Public Types inherited from ON_Object
enum	UserDataConflictResolution : unsigned char { UserDataConflictResolution::destination_object = 0, UserDataConflictResolution::source_object = 1, UserDataConflictResolution::source_copycount_gt = 2, UserDataConflictResolution::source_copycount_ge = 3, UserDataConflictResolution::destination_copycount_gt = 4, UserDataConflictResolution::destination_copycount_ge = 5, UserDataConflictResolution::delete_item = 6 }

Static Public Member Functions inherited from ON_Curve
static class ON_NurbsCurve *	CreateCubicLoft (int point_count, int point_dim, int point_stride, const double point_list, double k, int is_closed=0, ON::cubic_loft_end_condition start_shape=ON::cubic_loft_ec_quadratic, ON::cubic_loft_end_condition end_shape=ON::cubic_loft_ec_quadratic, class ON_NurbsCurve nurbs_curve=0)

Static Public Attributes inherited from ON_Geometry
const static ON_Geometry	Unset

Protected Member Functions inherited from ON_Curve
bool	ParameterSearch (double t, int &index, bool bEnableSnap, const ON_SimpleArray< double > &m_t, double RelTol=ON_SQRT_EPSILON) const

Detailed Description

THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY. ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF MERCHANTABILITY ARE HEREBY DISCLAIMED.

For complete openNURBS copyright information see http://www.opennurbs.org. Definition of poly curve (composite curve) Description: An ON_PolyCurve is an ON_Curve represented by a sequence of contiguous ON_Curve segments. A valid polycurve is represented by an array m_segment of Count()>=1 curve objects and a strictly increasing array m_t of Count()+1 parameter values. The i-th curve segment, when considered as part of the polycurve, is affinely reparamaterized from m_t[i] to m_t[i+1], i.e., m_segment[i].Domain()[0] is mapped to m_t[i] and m_segment[i].Domain()[1] is mapped to m_t[i+1].

Constructor & Destructor Documentation

◆ ON_PolyCurve() [1/3]

ON_PolyCurve::ON_PolyCurve ( )

◆ ~ON_PolyCurve()

virtual ON_PolyCurve::~ON_PolyCurve ( )

virtual

◆ ON_PolyCurve() [2/3]

ON_PolyCurve::ON_PolyCurve ( const ON_PolyCurve & )

◆ ON_PolyCurve() [3/3]

ON_PolyCurve::ON_PolyCurve ( int )

int = initial capacity - use when a good estimate

Member Function Documentation

◆ Append()

bool ON_PolyCurve::Append ( ON_Curve * )

Append curve.

◆ AppendAndMatch()

bool ON_PolyCurve::AppendAndMatch ( ON_Curve * )

Append and match start of curve to end of polycurve.

◆ ChangeClosedCurveSeam()

bool ON_PolyCurve::ChangeClosedCurveSeam ( double t )

overridevirtual

Description: If this curve is closed, then modify it so that the start/end point is at curve parameter t. Parameters: t - [in] curve parameter of new start/end point. The returned curves domain will start at t. Returns: true if successful. Remarks: Overrides virtual ON_Curve::ChangeClosedCurveSeam

Reimplemented from ON_Curve.

Reimplemented in CRhinoPolyEdge, and ON_PolyEdgeCurve.

◆ ChangeDimension()

bool ON_PolyCurve::ChangeDimension ( int desired_dimension )

overridevirtual

Description: Change the dimension of a curve. Parameters: desired_dimension - [in] Returns: true if the curve's dimension was already desired_dimension or if the curve's dimension was successfully changed to desired_dimension.

Reimplemented from ON_Curve.

◆ CloseGap()

bool ON_PolyCurve::CloseGap	(	int	gap_index,
		int	segments_to_modify
	)

Description: Modify the one or both locations at the end of segment[gap_index-1] and the start of segment[gap_index] so they are coincident. Parameters: gap_index - [in] 1 <= gap_index < Count() If the locations at the end of segment[gap_index-1] and the start of segment[gap_index] are not identical, then an attempt is made to modify the segments so these locations are closer. ends_to_modify - [in] 0: (suggested) The code will decide what segments to modify. 1: modify the end location of segment[gap_index-1] 2: modify the start location of segment[gap_index] Returns: True if a modification was performed and HasGap(gap_index-1) returns 0 after the modification. False if no modification was performed because there was no gap or because one could not be performed. Remarks: Note that passing the return value from FindNextGap() will close the gap found by FindNextGap().

◆ CloseGaps()

int ON_PolyCurve::CloseGaps ( )

Description: Searches for and closes all gaps that can be found. Returns: Number of gaps that were closed.

◆ Count()

int ON_PolyCurve::Count ( ) const

Interface.

number of segment curves

◆ DataCRC()

ON__UINT32 ON_PolyCurve::DataCRC ( ON__UINT32 current_remainder ) const

overridevirtual

virtual ON_Object::DataCRC override

Reimplemented from ON_Object.

◆ Degree()

int ON_PolyCurve::Degree ( ) const

overridevirtual

Description: Returns maximum algebraic degree of any span or a good estimate if curve spans are not algebraic. Returns: degree

Implements ON_Curve.

◆ Destroy()

void ON_PolyCurve::Destroy ( )

of the number of segments is known.

◆ DestroyRuntimeCache()

void ON_PolyCurve::DestroyRuntimeCache ( bool bDelete = true )

overridevirtual

virtual ON_Object::DestroyRuntimeCache override

Reimplemented from ON_Curve.

Reimplemented in ON_PolyEdgeCurve, and CRhinoPolyEdge.

◆ Dimension()

int ON_PolyCurve::Dimension ( ) const

overridevirtual

ON_Geometry overrides.

Reimplemented from ON_Geometry.

◆ Domain()

ON_Interval ON_PolyCurve::Domain ( ) const

overridevirtual

Returns: domain of the curve.

Implements ON_Curve.

◆ Dump()

void ON_PolyCurve::Dump ( ON_TextLog & ) const

overridevirtual

for debugging

Reimplemented from ON_Object.

◆ DuplicateCurve()

ON_Curve* ON_PolyCurve::DuplicateCurve ( ) const

overridevirtual

ON_Curve overrides.

Reimplemented from ON_Curve.

Reimplemented in ON_PolyEdgeCurve, and CRhinoPolyEdge.

◆ EmergencyDestroy()

void ON_PolyCurve::EmergencyDestroy ( )

call if memory used by ON_PolyCurve becomes invalid

◆ Evaluate()

bool ON_PolyCurve::Evaluate	(	double	t,
		int	der_count,
		int	v_stride,
		double *	v,
		int	side = `0`,
		int *	hint = `0`
	)		const

overridevirtual

Description: This evaluator actually does all the work. The other ON_Curve evaluation tools call this virtual function. Parameters: t - [in] evaluation parameter ( usually in Domain() ). der_count - [in] (>=0) number of derivatives to evaluate v_stride - [in] (>=Dimension()) stride to use for the v[] array v - [out] array of length (der_count+1)*v_stride curve(t) is returned in (v[0],...,v[m_dim-1]), curve'(t) is returned in (v[v_stride],...,v[v_stride+m_dim-1]), curve"(t) is returned in (v[2*v_stride],...,v[2*v_stride+m_dim-1]), etc. side - [in] optional - determines which side to evaluate from =0 default <0 to evaluate from below, >0 to evaluate from above hint - [in/out] optional evaluation hint used to speed repeated evaluations Returns: false if unable to evaluate. See Also: ON_Curve::EvPoint ON_Curve::Ev1Der ON_Curve::Ev2Der

Implements ON_Curve.

◆ EvaluatePoint()

bool ON_PolyCurve::EvaluatePoint	(	const class ON_ObjRef &	objref,
		ON_3dPoint &	P
	)		const

overridevirtual

virtual ON_Geometry override

Reimplemented from ON_Curve.

◆ ExplodeSingleSegmentCurve()

ON_Curve* ON_PolyCurve::ExplodeSingleSegmentCurve ( ) const

Description: If this has a single segment, return that single segment with user_data copied, reversed if necessary so the sense of the result is the same as this, and domain adjusted to match this->Domain. If the single segment is a polycurve, RemoveNesting should be called before calling ExplodeSingleSegmentCurve. Returns: NULL if not a single span polycurve The single span, adjusted as described above;

◆ Extend()

bool ON_PolyCurve::Extend ( const ON_Interval & domain )

overridevirtual

Description: Where possible, analytically extends curve to include domain. Parameters: domain - [in] if domain is not included in curve domain, curve will be extended so that its domain includes domain.
Will not work if curve is closed. Original curve is identical to the restriction of the resulting curve to the original curve domain, Returns: true if successful.

Reimplemented from ON_Curve.

◆ FindNextGap()

int ON_PolyCurve::FindNextGap ( int segment_index0 ) const

Description: Search the curve for gaps between the sub curve segments. Parameters: segment_index0 - [in] The search for gaps starts at with the comparing the end of segment[segment_index0] and the start of segment[segment_index0+1]. Returns: 0:
No gaps were found. i > segment_index0: The end of polycuve segment[i-1] is not coincident with the start of polycurve segment[i].

◆ FirstSegmentCurve()

ON_Curve* ON_PolyCurve::FirstSegmentCurve ( ) const

returns nullptr if count = 0

◆ GetBBox()

bool ON_PolyCurve::GetBBox	(	double *	boxmin,
		double *	boxmax,
		bool	bGrowBox = `false`
	)		const

overridevirtual

virtual ON_Geometry GetBBox override

Reimplemented from ON_Geometry.

◆ GetClosestPoint()

bool ON_PolyCurve::GetClosestPoint	(	const ON_3dPoint &	,
		double *	,
		double	= `0.0`,
		const ON_Interval *	= `nullptr`
	)		const

overridevirtual

Find parameter of the point on a curve that is closest to test_point. If the maximum_distance parameter is > 0, then only points whose distance to the given point is <= maximum_distance will be returned. Using a positive value of maximum_distance can substantially speed up the search. If the sub_domain parameter is not nullptr, then the search is restricted to the specified portion of the curve.

true if returned if the search is successful. false is returned if the search fails.

Reimplemented from ON_Curve.

◆ GetCurveParameterFromNurbFormParameter()

bool ON_PolyCurve::GetCurveParameterFromNurbFormParameter	(	double	,
		double *
	)		const

overridevirtual

virtual ON_Curve::GetCurveParameterFromNurbFormParameter override

Reimplemented from ON_Curve.

◆ GetLength()

bool ON_PolyCurve::GetLength	(	double *	,
		double	= `1.0e-8`,
		const ON_Interval *	= `nullptr`
	)		const

overridevirtual

Length of curve. true if returned if the length calculation is successful. false is returned if the length is not calculated.

The arc length will be computed so that (returned length - real length)/(real length) <= fractional_tolerance More simply, if you want N significant figures in the answer, set the fractional_tolerance to 1.0e-N. For "nice" curves, 1.0e-8 works fine. For very high degree nurbs and nurbs with bad parameterizations, use larger values of fractional_tolerance.

Reimplemented from ON_Curve.

◆ GetLocalClosestPoint()

bool ON_PolyCurve::GetLocalClosestPoint	(	const ON_3dPoint &	,
		double	,
		double *	,
		const ON_Interval *	= `nullptr`
	)		const

overridevirtual

Find parameter of the point on a curve that is locally closest to the test_point. The search for a local close point starts at seed_parameter. If the sub_domain parameter is not nullptr, then the search is restricted to the specified portion of the curve.

true if returned if the search is successful. false is returned if the search fails.

Reimplemented from ON_Curve.

◆ GetNextDiscontinuity()

bool ON_PolyCurve::GetNextDiscontinuity	(	ON::continuity	c,
		double	t0,
		double	t1,
		double *	t,
		int *	hint = `nullptr`,
		int *	dtype = `nullptr`,
		double	cos_angle_tolerance = `ON_DEFAULT_ANGLE_TOLERANCE_COSINE`,
		double	curvature_tolerance = `ON_SQRT_EPSILON`
	)		const

overridevirtual

Description: Search for a derivative, tangent, or curvature discontinuity. Parameters: c - [in] type of continuity to test for. If ON::continuity::C1_continuous t0 - [in] search begins at t0 t1 - [in] (t0 < t1) search ends at t1 t - [out] if a discontinuity is found, the *t reports the parameter at the discontinuity. hint - [in/out] if GetNextDiscontinuity will be called repeatedly, passing a "hint" with initial value *hint=0 will increase the speed of the search.
dtype - [out] if not nullptr, *dtype reports the kind of discontinuity found at *t. A value of 1 means the first derivative or unit tangent was discontinuous. A value of 2 means the second derivative or curvature was discontinuous. cos_angle_tolerance - [in] default = cos(1 degree) Used only when c is ON::continuity::G1_continuous or ON::continuity::G2_continuous. If the cosine of the angle between two tangent vectors is <= cos_angle_tolerance, then a G1 discontinuity is reported. curvature_tolerance - [in] (default = ON_SQRT_EPSILON) Used only when c is ON::continuity::G2_continuous or ON::continuity::Gsmooth_continuous.
ON::continuity::G2_continuous: If K0 and K1 are curvatures evaluated from above and below and |K0 - K1| > curvature_tolerance, then a curvature discontinuity is reported. ON::continuity::Gsmooth_continuous: If K0 and K1 are curvatures evaluated from above and below and the angle between K0 and K1 is at least twice angle tolerance or ||K0| - |K1|| > (max(|K0|,|K1|) > curvature_tolerance, then a curvature discontinuity is reported. Returns: true if a discontinuity was found on the interior of the interval (t0,t1). Remarks: Overrides ON_Curve::GetNextDiscontinuity.

Reimplemented from ON_Curve.

◆ GetNormalizedArcLengthPoint()

bool ON_PolyCurve::GetNormalizedArcLengthPoint	(	double	s,
		double *	t,
		double	fractional_tolerance = `1.0e-8`,
		const ON_Interval *	sub_domain = `nullptr`
	)		const

overridevirtual

Description: virtual ON_Curve::GetNormalizedArcLengthPoint override. Get the parameter of the point on the line that is a prescribed distance from the start of the line Parameters: s - [in] normalized arc length parameter. E.g., 0 = start of curve, 1/2 = midpoint of curve, 1 = end of curve. t - [out] parameter such that the length of the line from its start to t is arc_length. fractional_tolerance - [in] desired fractional precision. fabs(("exact" length from start to t) - arc_length)/arc_length <= fractional_tolerance sub_domain - [in] If not nullptr, the calculation is performed on the specified sub-domain of the curve. Returns: true if successful

Reimplemented from ON_Curve.

◆ GetNormalizedArcLengthPoints()

bool ON_PolyCurve::GetNormalizedArcLengthPoints	(	int	count,
		const double *	s,
		double *	t,
		double	absolute_tolerance = `0.0`,
		double	fractional_tolerance = `1.0e-8`,
		const ON_Interval *	sub_domain = `nullptr`
	)		const

overridevirtual

Description: virtual ON_Curve::GetNormalizedArcLengthPoints override. Get the parameter of the point on the curve that is a prescribed arc length from the start of the curve. Parameters: count - [in] number of parameters in s. s - [in] array of normalized arc length parameters. E.g., 0 = start of curve, 1/2 = midpoint of curve, 1 = end of curve. t - [out] array of curve parameters such that the length of the curve from its start to t[i] is s[i]*curve_length. absolute_tolerance - [in] if absolute_tolerance > 0, then the difference between (s[i+1]-s[i])*curve_length and the length of the curve segment from t[i] to t[i+1] will be <= absolute_tolerance. fractional_tolerance - [in] desired fractional precision for each segment. fabs("true" length - actual length)/(actual length) <= fractional_tolerance sub_domain - [in] If not nullptr, the calculation is performed on the specified sub-domain of the curve. A 0.0 s value corresponds to sub_domain->Min() and a 1.0 s value corresponds to sub_domain->Max(). Returns: true if successful

Reimplemented from ON_Curve.

◆ GetNurbForm()

int ON_PolyCurve::GetNurbForm	(	ON_NurbsCurve &	nurbs_curve,
		double	tolerance = `0.0`,
		const ON_Interval *	subdomain = `nullptr`
	)		const

overridevirtual

Description: Get a NURBS curve representation of this curve. Parameters: nurbs_curve - [out] NURBS representation returned here tolerance - [in] tolerance to use when creating NURBS representation. subdomain - [in] if not nullptr, then the NURBS representation for this portion of the curve is returned. Returns: 0 unable to create NURBS representation with desired accuracy. 1 success - returned NURBS parameterization matches the curve's to wthe desired accuracy 2 success - returned NURBS point locus matches the curve's to the desired accuracy and the domain of the NURBS curve is correct. On However, This curve's parameterization and the NURBS curve parameterization may not match to the desired accuracy. This situation happens when getting NURBS representations of curves that have a transcendental parameterization like circles Remarks: This is a low-level virtual function. If you do not need the parameterization information provided by the return code, then ON_Curve::NurbsCurve may be easier to use. See Also: ON_Curve::NurbsCurve

Reimplemented from ON_Curve.

◆ GetNurbFormParameterFromCurveParameter()

bool ON_PolyCurve::GetNurbFormParameterFromCurveParameter	(	double	,
		double *
	)		const

overridevirtual

virtual ON_Curve::GetNurbFormParameterFromCurveParameter override

Reimplemented from ON_Curve.

◆ GetSpanVector()

bool ON_PolyCurve::GetSpanVector ( double * span_parameters ) const

overridevirtual

Description: Get number of parameters of "knots". Parameters: span_parameters - [out] an array of length SpanCount()+1 is filled in with the parameters where the curve is not smooth (C-infinity). Returns: true if successful

Implements ON_Curve.

◆ GetTightBoundingBox()

bool ON_PolyCurve::GetTightBoundingBox	(	class ON_BoundingBox &	tight_bbox,
		bool	bGrowBox = `false`,
		const class ON_Xform *	xform = `nullptr`
	)		const

overridevirtual

virtual ON_Geometry GetTightBoundingBox override

Reimplemented from ON_Curve.

◆ HarvestSegment()

ON_Curve* ON_PolyCurve::HarvestSegment ( int )

Use the HarvestSegment() function when you want to prevent a segment from being destroyed by ~ON_PolyCurve(). HarvestSegment() replaces the polycurve segment with a nullptr. Count() and parameter information remains unchanged.

◆ HasGap()

int ON_PolyCurve::HasGap ( ) const

Deprecated:: Replace calls to HasGap() with FindNextGap(0)

◆ HasGapAt()

bool ON_PolyCurve::HasGapAt ( int segment_index ) const

Description: Determine if there is a gap between the end of segment[segment_index] and the start of segment[segment_index+1]. Parameters: segment_index - [in] >= 0 Returns: true: segment_index was valid and there is a gap between the end of segment[segment_index] and the start of segment[segment_index+1].

◆ HasNurbForm()

int ON_PolyCurve::HasNurbForm ( ) const

overridevirtual

Description: Does a NURBS curve representation of this curve. Parameters: Returns: 0 unable to create NURBS representation with desired accuracy. 1 success - NURBS parameterization matches the curve's to wthe desired accuracy 2 success - NURBS point locus matches the curve's and the domain of the NURBS curve is correct.
However, This curve's parameterization and the NURBS curve parameterization may not match. This situation happens when getting NURBS representations of curves that have a transcendental parameterization like circles Remarks: This is a low-level virtual function.
See Also: ON_Curve::GetNurbForm ON_Curve::NurbsCurve

Reimplemented from ON_Curve.

◆ HasSynchronizedSegmentDomains()

bool ON_PolyCurve::HasSynchronizedSegmentDomains ( ) const

Returns: True if the domains of the curves in the m_segment[] array exactly match the domains of the segments specified in the m_t[] array. Put another way, returns true if SegmentDomain(i) = SegmentCurve(i).Domain() for every segment index.

◆ Insert()

bool ON_PolyCurve::Insert	(	int	,
		ON_Curve *
	)

◆ IsArc()

bool ON_PolyCurve::IsArc	(	const ON_Plane *	plane = `nullptr`,
		ON_Arc *	arc = `nullptr`,
		double	tolerance = `ON_ZERO_TOLERANCE`
	)		const

overridevirtual

Description: Test a curve to see if the locus if its points is an arc or circle. Parameters: plane - [in] if not nullptr, test is performed in this plane arc - [out] if not nullptr and true is returned, then arc parameters are filled in tolerance - [in] tolerance to use when checking Returns: ON_Arc.m_angle > 0 if curve locus is an arc between specified points. If ON_Arc.m_angle is 2.0*ON_PI, then the curve is a circle.

Reimplemented from ON_Curve.

◆ IsClosed()

bool ON_PolyCurve::IsClosed ( void ) const

overridevirtual

CV = euclidean location of end CV, or curve is

Reimplemented from ON_Curve.

Reimplemented in ON_PolyEdgeCurve, and CRhinoPolyEdge.

◆ IsContinuous()

bool ON_PolyCurve::IsContinuous	(	ON::continuity	c,
		double	t,
		int *	hint = `nullptr`,
		double	point_tolerance = `ON_ZERO_TOLERANCE`,
		double	d1_tolerance = `ON_ZERO_TOLERANCE`,
		double	d2_tolerance = `ON_ZERO_TOLERANCE`,
		double	cos_angle_tolerance = `ON_DEFAULT_ANGLE_TOLERANCE_COSINE`,
		double	curvature_tolerance = `ON_SQRT_EPSILON`
	)		const

overridevirtual

Description: Test continuity at a curve parameter value. Parameters: c - [in] continuity to test for t - [in] parameter to test hint - [in] evaluation hint point_tolerance - [in] if the distance between two points is greater than point_tolerance, then the curve is not C0. d1_tolerance - [in] if the difference between two first derivatives is greater than d1_tolerance, then the curve is not C1. d2_tolerance - [in] if the difference between two second derivatives is greater than d2_tolerance, then the curve is not C2. cos_angle_tolerance - [in] default = cos(1 degree) Used only when c is ON::continuity::G1_continuous or ON::continuity::G2_continuous. If the cosine of the angle between two tangent vectors is <= cos_angle_tolerance, then a G1 discontinuity is reported. curvature_tolerance - [in] (default = ON_SQRT_EPSILON) Used only when c is ON::continuity::G2_continuous or ON::continuity::Gsmooth_continuous.
ON::continuity::G2_continuous: If K0 and K1 are curvatures evaluated from above and below and |K0 - K1| > curvature_tolerance, then a curvature discontinuity is reported. ON::continuity::Gsmooth_continuous: If K0 and K1 are curvatures evaluated from above and below and the angle between K0 and K1 is at least twice angle tolerance or ||K0| - |K1|| > (max(|K0|,|K1|) > curvature_tolerance, then a curvature discontinuity is reported. Returns: true if the curve has at least the c type continuity at the parameter t. Remarks: Overrides ON_Curve::IsContinuous.

Reimplemented from ON_Curve.

◆ IsDeformable()

bool ON_PolyCurve::IsDeformable ( ) const

overridevirtual

virtual ON_Geometry::IsDeformable() override

Reimplemented from ON_Geometry.

◆ IsInPlane()

bool ON_PolyCurve::IsInPlane	(	const ON_Plane &	test_plane,
		double	tolerance = `ON_ZERO_TOLERANCE`
	)		const

overridevirtual

Description: Test a curve to see if it lies in a specific plane. Parameters: test_plane - [in] tolerance - [in] tolerance to use when checking Returns: true if the maximum distance from the curve to the test_plane is <= tolerance.

Implements ON_Curve.

◆ IsLinear()

bool ON_PolyCurve::IsLinear ( double tolerance = ON_ZERO_TOLERANCE ) const

overridevirtual

Description: Test a curve to see if the locus if its points is a line segment. Parameters: tolerance - [in] ///< tolerance to use when checking linearity Returns: true if the ends of the curve are farther than tolerance apart and the maximum distance from any point on the curve to the line segment connecting the curve's ends is <= tolerance.

Reimplemented from ON_Curve.

◆ IsMorphable()

bool ON_PolyCurve::IsMorphable ( ) const

overridevirtual

virtual ON_Geometry override

Reimplemented from ON_Geometry.

◆ IsNested()

bool ON_PolyCurve::IsNested ( ) const

Returns: True if a curve in the m_segment[] array is an ON_PolyCurve.

◆ IsPeriodic()

bool ON_PolyCurve::IsPeriodic ( void ) const

overridevirtual

periodic.)

Reimplemented from ON_Curve.

◆ IsPlanar()

bool ON_PolyCurve::IsPlanar	(	ON_Plane *	plane = `nullptr`,
		double	tolerance = `ON_ZERO_TOLERANCE`
	)		const

overridevirtual

Description: Test a curve to see if it is planar. Parameters: plane - [out] if not nullptr and true is returned, the plane parameters are filled in. tolerance - [in] tolerance to use when checkin Note: If the curve is a simple planar closed curve the plane orientation agrees with the curve orientation. Returns: true if there is a plane such that the maximum distance from the curve to the plane is <= tolerance.

Reimplemented from ON_Curve.

◆ IsPolyline()

int ON_PolyCurve::IsPolyline	(	ON_SimpleArray< ON_3dPoint > *	pline_points = `nullptr`,
		ON_SimpleArray< double > *	pline_t = `nullptr`
	)		const

overridevirtual

Description: Several types of ON_Curve can have the form of a polyline including a degree 1 ON_NurbsCurve, an ON_PolylineCurve, and an ON_PolyCurve all of whose segments are some form of polyline. IsPolyline tests a curve to see if it can be represented as a polyline. Parameters: pline_points - [out] if not nullptr and true is returned, then the points of the polyline form are returned here. t - [out] if not nullptr and true is returned, then the parameters of the polyline points are returned here. Returns: @untitled table 0 curve is not some form of a polyline >=2 number of points in polyline form

Reimplemented from ON_Curve.

◆ IsShort()

bool ON_PolyCurve::IsShort	(	double	tolerance,
		const ON_Interval *	sub_domain = `0`,
		double *	length_estimate = `0`
	)		const

overridevirtual

Description: Used to quickly find short curves. Parameters: tolerance - [in] (>=0) sub_domain - [in] If not nullptr, the test is performed on the interval that is the intersection of sub_domain with Domain(). Returns: True if the length of the curve is <= tolerance. Remarks: Faster than calling Length() and testing the result.

Reimplemented from ON_Curve.

◆ IsValid() [1/2]

bool ON_PolyCurve::IsValid	(	bool	bAllowGaps,
		ON_TextLog *	text_log
	)		const

Description: Tests an object to see if its data members are correctly initialized. Parameters: bAllowGaps - [in] If true, gaps are allowed between polycurve segments. If false, gaps are not allowed between polycurve segments. text_log - [in] if the object is not valid and text_log is not nullptr, then a brief english description of the reason the object is not valid is appended to the log. The information appended to text_log is suitable for low-level debugging purposes by programmers and is not intended to be useful as a high level user interface tool. Returns: @untitled table true object is valid false object is invalid, uninitialized, etc. Remarks: Overrides virtual ON_Object::IsValid

◆ IsValid() [2/2]

bool ON_PolyCurve::IsValid ( class ON_TextLog * text_log = nullptr ) const

overridevirtual

Description: Tests an object to see if its data members are correctly initialized. Parameters: text_log - [in] if the object is not valid and text_log is not nullptr, then a brief english description of the reason the object is not valid is appended to the log. The information appended to text_log is suitable for low-level debugging purposes by programmers and is not intended to be useful as a high level user interface tool. Returns: @untitled table true object is valid false object is invalid, uninitialized, etc.

Reimplemented from ON_Geometry.

◆ LastSegmentCurve()

ON_Curve* ON_PolyCurve::LastSegmentCurve ( ) const

returns nullptr if count = 0

◆ MakeDeformable()

bool ON_PolyCurve::MakeDeformable ( )

overridevirtual

virtual ON_Geometry::MakeDeformable() override

Reimplemented from ON_Geometry.

◆ Morph()

bool ON_PolyCurve::Morph ( const ON_SpaceMorph & morph )

override

virtual ON_Geometry override

◆ operator=()

ON_PolyCurve& ON_PolyCurve::operator= ( const ON_PolyCurve & )

◆ operator[]()

ON_Curve* ON_PolyCurve::operator[] ( int ) const

These operator[] functions return nullptr if index is out of range.

◆ ParameterSearch()

bool ON_PolyCurve::ParameterSearch	(	double	t,
		int &	index,
		bool	bEnableSnap
	)		const

Description: Lookup a parameter in the m_t array, optionally using a built in snap tolerance to snap a parameter value to an element of m_t. Parameters: t - [in] parameter index -[out] index into m_t such that if the function returns true then t is equal to, or is within tolerance of m_t[index]. if function returns false then the value of index is

 @table  
            condition                                   value of index
t<m_t[0] or m_t is empty                -1
    m_t[i] < t < m_t[i+1]               i for 0<=i<=m_t.Count()-2
    t>m_t[ m_t.Count()-1]               m_t.Count()-1

bEnableSnap -[in] if true use tolerance when comparing to m_t values Returns
true if the t is exactly equal to, or within tolerance of (only if bEnableSnap==true) m_t[index].

◆ PolyCurveParameter()

double ON_PolyCurve::PolyCurveParameter	(	int	segment_index,
		double	segmentcurve_parameter
	)		const

Description: Converts a segment curve parameter to a polycurve parameter. Parameters: segment_index - [in] segmentcurve_parameter - [in] Returns: Polycurve evaluation parameter or ON_UNSET_VALUE if the polycurve curve parameter cannot be computed. See Also: ON_PolyCurve::SegmentCurveParameter

◆ Prepend()

bool ON_PolyCurve::Prepend ( ON_Curve * )

Prepend curve.

ON_Curve pointers added with Prepend(), Append(), PrependAndMatch(), AppendANdMatch(),and Insert() are deleted by ~ON_PolyCurve(). Use ON_CurveProxy( ON_Curve*) if you want the original curve segment to survive ~ON_PolyCurve().

◆ PrependAndMatch()

bool ON_PolyCurve::PrependAndMatch ( ON_Curve * )

Prepend and match end of curve to start of polycurve.

PrependAndMatch() and AppendAndMatch() return false if this->IsClosed() or this->Count() > 0 and curve is closed

◆ Read()

bool ON_PolyCurve::Read ( ON_BinaryArchive & binary_archive )

overridevirtual

Description: Low level archive writing tool used by ON_BinaryArchive::ReadObject(). Parameters: binary_archive - archive to read from Returns: Returns true if the read is successful. Remarks: Use ON_BinaryArchive::ReadObject() to read objects. This Read() function should read the objects definition back into its data members.

The default implementation of this virtual function returns false and does nothing.

Reimplemented from ON_Object.

◆ Remove() [1/2]

bool ON_PolyCurve::Remove ( )

delete last segment and reduce count by 1

◆ Remove() [2/2]

bool ON_PolyCurve::Remove ( int )

delete specified segment and reduce count by 1

◆ RemoveNesting()

bool ON_PolyCurve::RemoveNesting ( )

Description: Removes the nested of polycurves. The result will have not have an ON_PolyCurve as a segment but will have identical locus and parameterization. Returns: True if a nested polycurve was removed. False if no nested polycurves were found.

◆ RemoveNestingEx()

bool ON_PolyCurve::RemoveNestingEx ( )

Deprecated:: Use RemoveNesting(). RemoveNestingEx() will be removed in the next release.

◆ RemoveShortSegments()

bool ON_PolyCurve::RemoveShortSegments	(	double	tolerance,
		bool	bRemoveShortSegments = `true`
	)

overridevirtual

Description: Looks for segments that are shorter than tolerance that can be removed. If bRemoveShortSegments is true, then the short segments are removed. Does not change the domain, but it will change the relative parameterization. Parameters: tolerance - [in] bRemoveShortSegments - [in] If true, then short segments are removed. Returns: True if removable short segments can were found. False if no removable short segments can were found.

Reimplemented from ON_Curve.

◆ Reserve()

void ON_PolyCurve::Reserve ( int )

make sure capacity is at least the specified count

◆ Reverse()

bool ON_PolyCurve::Reverse ( )

overridevirtual

reverse parameterizatrion

Implements ON_Curve.

◆ SanitizeDomain()

void ON_PolyCurve::SanitizeDomain ( )

remove "fuzz" in m_t[] domain array that is in some older files. Called in Read() and in brep edge merging.

◆ SegmentCurve()

ON_Curve* ON_PolyCurve::SegmentCurve ( int segment_index ) const

Description: Returns a pointer to a segment curve. Parameters: segment_index - [in] 0 based index (0 <= segment_index < Count() ) Returns: A pointer to the segment curve. Returns nullptr if segment_index < 0 or segment_index >= Count().

◆ SegmentCurveParameter()

double ON_PolyCurve::SegmentCurveParameter ( double polycurve_parameter ) const

Description: Converts a polycurve parameter to a segment curve parameter. Parameters: polycurve_parameter - [in] Returns: Segment curve evaluation parameter or ON_UNSET_VALUE if the segment curve parameter cannot be computed. See Also: ON_PolyCurve::PolyCurveParameter

◆ SegmentCurves()

const ON_CurveArray& ON_PolyCurve::SegmentCurves ( ) const

Returns: Reference to m_segment.

◆ SegmentDomain()

ON_Interval ON_PolyCurve::SegmentDomain ( int segment_index ) const

Description: Returns the polycurve subdomain assigned to a segment curve. Parameters: segment_index - [in] 0 based index (0 <= segment_index < Count() ) Returns: The polycurve subdomain assigned to a segment curve. Returns ([ON_UNSET_VALUE,ON_UNSET_VALUE) if segment_index < 0
or segment_index >= Count().

◆ SegmentIndex() [1/2]

int ON_PolyCurve::SegmentIndex ( double polycurve_parameter ) const

Description: Find the segment used for evaluation at polycurve_parameter. Parameters: polycurve_parameter - [in] Returns: index of the segment used for evaluation at polycurve_parameter. If polycurve_parameter < Domain.Min(), then 0 is returned. If polycurve_parameter > Domain.Max(), then Count()-1 is returned.

◆ SegmentIndex() [2/2]

int ON_PolyCurve::SegmentIndex	(	ON_Interval	sub_domain,
		int *	segment_index0,
		int *	segment_index1
	)		const

Description: Find the segments with support on sub_domain. Parameters: sub_domain - [in] increasing interval segment_index0 - [out] segment_index1 - [out] segments with index i where segment_index0 <= i < *segment_index1 are the segments with support on the sub_domain Returns: number of segments with support on sub_domain.

◆ SegmentParameters()

const ON_SimpleArray<double>& ON_PolyCurve::SegmentParameters ( ) const

Returns: Reference to m_t.

◆ SetDomain()

bool ON_PolyCurve::SetDomain	(	double	t0,
		double	t1
	)

overridevirtual

Description: virtual ON_Curve::SetDomain override. Set the domain of the curve Parameters: t0 - [in] t1 - [in] new domain will be [t0,t1] Returns: true if successful.

Reimplemented from ON_Curve.

◆ SetEndPoint()

bool ON_PolyCurve::SetEndPoint ( ON_3dPoint end_point )

overridevirtual

virtual

Description: Force the curve to end at a specified point. Parameters: end_point - [in] Returns: true if successful. Remarks: Some end points cannot be moved. Be sure to check return code. See Also: ON_Curve::SetStartPoint ON_Curve::PointAtStart ON_Curve::PointAtEnd

Reimplemented from ON_Curve.

Reimplemented in CRhinoPolyEdge, and ON_PolyEdgeCurve.

◆ SetParameterization()

bool ON_PolyCurve::SetParameterization ( const double * t )

Description: Expert user function to set the m_t[] array. Parameters: t - [in] increasing array of SegmentCount()+1 parameters. Returns True if successful.

◆ SetSegment()

void ON_PolyCurve::SetSegment	(	int	index,
		ON_Curve *	crv
	)

Expert user function
Sets the m_segment[index] to crv.

◆ SetStartPoint()

bool ON_PolyCurve::SetStartPoint ( ON_3dPoint start_point )

overridevirtual

Domain changes from [a,b] to [-b,-a].

Description: Force the curve to start at a specified point. Parameters: start_point - [in] Returns: true if successful. Remarks: Some start points cannot be moved. Be sure to check return code. See Also: ON_Curve::SetEndPoint ON_Curve::PointAtStart ON_Curve::PointAtEnd virtual

Reimplemented from ON_Curve.

Reimplemented in CRhinoPolyEdge, and ON_PolyEdgeCurve.

◆ SizeOf()

unsigned int ON_PolyCurve::SizeOf ( ) const

overridevirtual

ON_Object overrides.

virtual ON_Object::SizeOf override

Reimplemented from ON_Curve.

◆ SpanCount()

int ON_PolyCurve::SpanCount ( ) const

overridevirtual

number of smooth spans in curve

Implements ON_Curve.

◆ Split()

bool ON_PolyCurve::Split	(	double	t,
		ON_Curve *&	left_side,
		ON_Curve *&	right_side
	)		const

overridevirtual

Description: virtual ON_Curve::Split override. Divide the curve at the specified parameter. The parameter must be in the interior of the curve's domain. The pointers passed to Split must either be nullptr or point to an ON_Curve object of the same of the same type. If the pointer is nullptr, then a curve will be created in Split(). You may pass "this" as one of the pointers to Split(). Parameters: t - [in] parameter in interval Domain(). left_side - [out] left portion of curve right_side - [out] right portion of curve Example: For example, if crv were an ON_NurbsCurve, then

ON_NurbsCurve right_side; crv.Split( crv.Domain().Mid() &crv, &right_side );

would split crv at the parametric midpoint, put the left side in crv, and return the right side in right_side.

Parameters

t	t = curve parameter to split curve at
left_side	left portion returned here
right_side	right portion returned here

Reimplemented from ON_Curve.

◆ SwapCoordinates()

bool ON_PolyCurve::SwapCoordinates	(	int	i,
		int	j
	)

overridevirtual

Description: Swaps object coordinate values with indices i and j.

Parameters: i - [in] coordinate index j - [in] coordinate index

Remarks: The default implementation uses the virtual Transform() function to calculate the result. If you are creating an object where Transform() is slow, coordinate swapping will be frequently used, and coordinate swapping can be quickly accomplished, then override this function.

Example:

     ON_Point point(7,8,9);
     point.SwapCoordinates(0,2);
     ///< point = (9,8,7)

Reimplemented from ON_Geometry.

◆ SynchronizeSegmentDomains()

bool ON_PolyCurve::SynchronizeSegmentDomains ( )

Description: Sets the domain of the curve int the m_segment[] array to exactly match the domain defined in the m_t[] array. This is not required, but can simplify some coding situations. Returns: True if at least one segment was reparameterized. False if no changes were made.

◆ Transform()

bool ON_PolyCurve::Transform ( const ON_Xform & xform )

overridevirtual

Description: overrides virtual ON_Geometry::Transform(). ON_Curve::Transform() calls ON_Geometry::Transform(xform), which calls ON_Object::TransformUserData(xform), and then calls this->DestroyCurveTree(). Parameters: xform - [in] transformation to apply to object. Remarks: Classes derived from ON_Curve should call ON_Curve::Transform() to handle user data transformations and curve tree destruction and then transform their definition.

Reimplemented from ON_Curve.

◆ Trim()

bool ON_PolyCurve::Trim ( const ON_Interval & domain )

overridevirtual

Description: virtual ON_Curve::Trim override. Removes portions of the curve outside the specified interval. Parameters: domain - [in] interval of the curve to keep. Portions of the curve before curve(domain[0]) and after curve(domain[1]) are removed. Returns: true if successful.

Reimplemented from ON_Curve.

◆ Write()

bool ON_PolyCurve::Write ( ON_BinaryArchive & binary_archive ) const

overridevirtual

Description: Low level archive writing tool used by ON_BinaryArchive::WriteObject(). Parameters: binary_archive - archive to write to Returns: Returns true if the write is successful. Remarks: Use ON_BinaryArchive::WriteObject() to write objects. This Write() function should just write the specific definition of this object. It should not write and any chunk typecode or length information.

The default implementation of this virtual function returns false and does nothing.

Reimplemented from ON_Object.

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ON_PolyCurve() [1/3]

◆ ~ON_PolyCurve()

◆ ON_PolyCurve() [2/3]

◆ ON_PolyCurve() [3/3]

Member Function Documentation

◆ Append()

◆ AppendAndMatch()

◆ ChangeClosedCurveSeam()

◆ ChangeDimension()

◆ CloseGap()

◆ CloseGaps()

◆ Count()

◆ DataCRC()

◆ Degree()

◆ Destroy()

◆ DestroyRuntimeCache()

◆ Dimension()

◆ Domain()

◆ Dump()

◆ DuplicateCurve()

◆ EmergencyDestroy()

◆ Evaluate()

◆ EvaluatePoint()

◆ ExplodeSingleSegmentCurve()

◆ Extend()

◆ FindNextGap()

◆ FirstSegmentCurve()

◆ GetBBox()

◆ GetClosestPoint()

◆ GetCurveParameterFromNurbFormParameter()

◆ GetLength()

◆ GetLocalClosestPoint()

◆ GetNextDiscontinuity()

◆ GetNormalizedArcLengthPoint()

◆ GetNormalizedArcLengthPoints()

◆ GetNurbForm()

◆ GetNurbFormParameterFromCurveParameter()

◆ GetSpanVector()

◆ GetTightBoundingBox()

◆ HarvestSegment()

◆ HasGap()

◆ HasGapAt()

◆ HasNurbForm()

◆ HasSynchronizedSegmentDomains()

◆ Insert()

◆ IsArc()

◆ IsClosed()

◆ IsContinuous()

◆ IsDeformable()

◆ IsInPlane()

◆ IsLinear()

◆ IsMorphable()

◆ IsNested()

◆ IsPeriodic()

◆ IsPlanar()

◆ IsPolyline()

◆ IsShort()

◆ IsValid() [1/2]

◆ IsValid() [2/2]

◆ LastSegmentCurve()

◆ MakeDeformable()

◆ Morph()

◆ operator=()

◆ operator[]()

◆ ParameterSearch()

◆ PolyCurveParameter()

◆ Prepend()

◆ PrependAndMatch()

◆ Read()

◆ Remove() [1/2]

◆ Remove() [2/2]

◆ RemoveNesting()

◆ RemoveNestingEx()

◆ RemoveShortSegments()

◆ Reserve()

◆ Reverse()