#include <opennurbs_polylinecurve.h>

Inheritance diagram for ON_PolylineCurve:

Public Member Functions
	ON_PolylineCurve () ON_NOEXCEPT

	ON_PolylineCurve (const ON_PolylineCurve &)

	ON_PolylineCurve (const ON_3dPointArray &, const ON_SimpleArray< double > &)
	Construct polyline from points and parameters. More...

	ON_PolylineCurve (const ON_3dPointArray &)

virtual	~ON_PolylineCurve ()

bool	Append (const ON_PolylineCurve &)

bool	ChangeClosedCurveSeam (double t) override

bool	ChangeDimension (int desired_dimension) override

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

int	Degree () const override

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

ON_Interval	Domain () const override
	ON_Curve overrides. More...

void	Dump (ON_TextLog &dump) const override

void	EmergencyDestroy ()

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

bool	Extend (const ON_Interval &domain) override

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

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

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

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 *knot_values) 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...

int	HasNurbForm () const override

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

bool	IsClosed () 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 &test_plane, double tolerance=ON_ZERO_TOLERANCE) const override

bool	IsLinear (double tolerance=ON_ZERO_TOLERANCE) const override

bool	IsPeriodic (void) const override

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

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

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

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

ON_PolylineCurve &	operator= (const ON_PolylineCurve &)

ON_PolylineCurve &	operator= (const ON_3dPointArray &)

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

int	PointCount () const
	Interface. More...

bool	Read (ON_BinaryArchive &binary_archive) override

bool	Reverse () override

bool	SetDomain (double t0, double t1) override

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

bool	SetStartPoint (ON_3dPoint start_point) override
	virtual More...

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

int	SpanCount () const override

bool	Split (double, ON_Curve &, ON_Curve &) const override

bool	SwapCoordinates (int i, int j) override

bool	Transform (const ON_Xform &xform) override

bool	Trim (const ON_Interval &) override

bool	Write (ON_BinaryArchive &binary_archive) const override

Public Member Functions inherited from ON_Curve
	ON_Curve () ON_NOEXCEPT

	ON_Curve (const ON_Curve &)

virtual	~ON_Curve ()

ON_3dVector	CurvatureAt (double t) const

ON_3dVector	DerivativeAt (double t) const

void	DestroyCurveTree ()

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

virtual ON_Curve *	DuplicateCurve () const

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

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	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

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

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)

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_BoundingBox &bbox, bool bGrowBox=false) const

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

virtual bool	HasBrepForm () const

ON_Geometry &	operator= (const ON_Geometry &)=default

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

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

bool	Scale (double scale_factor)

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_ComponentStatus states_to_clear) const

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

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

void	CopyUserData (const ON_Object &source_object)

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	IsKindOf (const ON_ClassId *pClassId) const

virtual void	MarkAggregateComponentStatusAsNotCurrent () const

virtual void	MemoryRelocate ()

virtual ON_UUID	ModelObjectId () const

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

void	MoveUserData (ON_Object &source_object)

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)

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

Public Attributes
int	m_dim
	2 or 3 (2 so ON_PolylineCurve can be uses as a trimming curve) More...

ON_Polyline	m_pline

ON_SimpleArray< double >	m_t
	parameters More...

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 Attributes inherited from ON_Geometry
static const 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

Constructor & Destructor Documentation

◆ ON_PolylineCurve() [1/4]

ON_PolylineCurve::ON_PolylineCurve ( )

◆ ~ON_PolylineCurve()

virtual ON_PolylineCurve::~ON_PolylineCurve ( )

virtual

◆ ON_PolylineCurve() [2/4]

ON_PolylineCurve::ON_PolylineCurve ( const ON_PolylineCurve & )

◆ ON_PolylineCurve() [3/4]

ON_PolylineCurve::ON_PolylineCurve	(	const ON_3dPointArray &	,
		const ON_SimpleArray< double > &
	)

Construct polyline from points and parameters.

◆ ON_PolylineCurve() [4/4]

ON_PolylineCurve::ON_PolylineCurve ( const ON_3dPointArray & )

Member Function Documentation

◆ Append()

bool ON_PolylineCurve::Append ( const ON_PolylineCurve & )

◆ ChangeClosedCurveSeam()

bool ON_PolylineCurve::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.

◆ ChangeDimension()

bool ON_PolylineCurve::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.

◆ DataCRC()

ON__UINT32 ON_PolylineCurve::DataCRC ( ON__UINT32 current_remainder ) const

overridevirtual

virtual ON_Object::DataCRC override

Reimplemented from ON_Object.

◆ Degree()

int ON_PolylineCurve::Degree ( ) const

overridevirtual

Description: virtual ON_Curve::Degree override. Returns: 1

Implements ON_Curve.

◆ Dimension()

int ON_PolylineCurve::Dimension ( ) const

overridevirtual

ON_Geometry overrides.

Description: virtual ON_Geometry::Dimension override Returns: value of m_dim

Reimplemented from ON_Geometry.

◆ Domain()

ON_Interval ON_PolylineCurve::Domain ( ) const

overridevirtual

ON_Curve overrides.

Description: virtual ON_Curve::Domain override. Returns: domain of the polyline curve.

Implements ON_Curve.

◆ Dump()

void ON_PolylineCurve::Dump ( ON_TextLog & dump ) const

overridevirtual

Description: virtual ON_Object::Dump override

Reimplemented from ON_Object.

◆ EmergencyDestroy()

void ON_PolylineCurve::EmergencyDestroy ( )

Description: Call if memory used by ON_PolylineCurve becomes invalid.

◆ Evaluate()

bool ON_PolylineCurve::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 retuned in (v[v_stride],...,v[v_stride+m_dim-1]), curve"(t) is retuned 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

Parameters

t	returns false if unable to evaluate evaluation parameter
der_count	number of derivatives (>=0)
v_stride	array stride (>=Dimension())
v	array of length stride*(ndir+1)
side	optional - determines which side to evaluate from 0 = default < 0 to evaluate from below, > 0 to evaluate from above
hint	optional - evaluation hint (int) used to speed repeated evaluations

Implements ON_Curve.

◆ Extend()

bool ON_PolylineCurve::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.

◆ GetBBox()

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

overridevirtual

virtual ON_Geometry GetBBox override

Reimplemented from ON_Geometry.

◆ GetCurveParameterFromNurbFormParameter()

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

overridevirtual

virtual ON_Curve::GetCurveParameterFromNurbFormParameter override

Reimplemented from ON_Curve.

◆ GetNextDiscontinuity()

bool ON_PolylineCurve::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 derivatitive, tangent, or curvature discontinuity. Parameters: c - [in] type of continity 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.

◆ GetNurbForm()

int ON_PolylineCurve::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 transendental 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

Parameters

nurbs_curve	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 but, on the interior of the curve's domain, the curve's parameterization and the NURBS parameterization may not match to the desired accuracy.
subdomain	OPTIONAL subdomain of polyline

Reimplemented from ON_Curve.

◆ GetNurbFormParameterFromCurveParameter()

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

overridevirtual

virtual ON_Curve::GetNurbFormParameterFromCurveParameter override

Reimplemented from ON_Curve.

◆ GetSpanVector()

bool ON_PolylineCurve::GetSpanVector ( double * knot_values ) const

overridevirtual

Description: virtual ON_Curve::GetSpanVector override. Get list of parameters at polyline points. Parameters: knot_values - [out] an array of length SpanCount()+1 is filled in with the parameter values. knot_values[i] is the parameter for the point m_pline[i]. Returns: true if successful

Implements ON_Curve.

◆ GetTightBoundingBox()

bool ON_PolylineCurve::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.

◆ HasNurbForm()

int ON_PolylineCurve::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 transendental parameterization like circles Remarks: This is a low-level virtual function. See Also: ON_Curve::GetNurbForm ON_Curve::NurbsCurve

Reimplemented from ON_Curve.

◆ IsArc()

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

overridevirtual

Description: virtual ON_Curve::IsArc override. Returns: false for all polylines.

Reimplemented from ON_Curve.

◆ IsClosed()

bool ON_PolylineCurve::IsClosed ( ) const

overridevirtual

Description: virtual ON_Curve::IsClosed override. Returns: true if the polyline has 4 or more point, the first point and the last point are equal, and some other point is distinct from the first and last point.

Reimplemented from ON_Curve.

◆ IsContinuous()

bool ON_PolylineCurve::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_PolylineCurve::IsDeformable ( ) const

overridevirtual

virtual ON_Geometry::IsDeformable() override

Reimplemented from ON_Geometry.

◆ IsInPlane()

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

overridevirtual

Description: virtual ON_Curve::IsInPlane override. Returns: true if every point in the polyline is within tolerance of the test_plane.

Implements ON_Curve.

◆ IsLinear()

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

overridevirtual

Description: virtual ON_Curve::IsLinear override. Returns: true if all the polyline points are within tolerance of the line segment connecting the ends of the polyline.

Reimplemented from ON_Curve.

◆ IsPeriodic()

bool ON_PolylineCurve::IsPeriodic ( void ) const

overridevirtual

Description: virtual ON_Curve::IsPeriodic override. Returns: false for all polylines.

Reimplemented from ON_Curve.

◆ IsPlanar()

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

overridevirtual

Description: virtual ON_Curve::IsPlanar override. Returns: true if the polyline is planar.

Reimplemented from ON_Curve.

◆ IsPolyline()

int ON_PolylineCurve::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: table 0 curve is not some form of a polyline >=2 number of points in polyline form

Reimplemented from ON_Curve.

◆ IsValid()

bool ON_PolylineCurve::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 englis description of the reason the object is not valid is appened 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: table true object is valid false object is invalid, uninitialized, etc.

Reimplemented from ON_Geometry.

◆ MakeDeformable()

bool ON_PolylineCurve::MakeDeformable ( )

overridevirtual

virtual ON_Geometry::MakeDeformable() override

Reimplemented from ON_Geometry.

◆ operator=() [1/2]

ON_PolylineCurve& ON_PolylineCurve::operator= ( const ON_PolylineCurve & )

◆ operator=() [2/2]

ON_PolylineCurve& ON_PolylineCurve::operator= ( const ON_3dPointArray & )

◆ ParameterSearch()

bool ON_PolylineCurve::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 function returns false then value of index is

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

if the function returns true then t is equal to, or is closest to and 
within  tolerance of m_t[index].

bEnableSnap-[in] enable snapping Returns: true if the t is exactly equal to, or within tolerance of (only if bEnableSnap==true) m_t[index].

◆ PointCount()

int ON_PolylineCurve::PointCount ( ) const

Interface.

number of points in polyline

◆ Read()

bool ON_PolylineCurve::Read ( ON_BinaryArchive & binary_archive )

overridevirtual

Description: virtual ON_Object::Read override

Reimplemented from ON_Object.

◆ Reverse()

bool ON_PolylineCurve::Reverse ( )

overridevirtual

Description: virtual ON_Curve::Reverse override. Reverse parameterizatrion by negating all m_t values and reversing the order of the m_pline points. Remarks: Domain changes from [a,b] to [-b,-a]

Implements ON_Curve.

◆ SetDomain()

bool ON_PolylineCurve::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_PolylineCurve::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.

◆ SetStartPoint()

bool ON_PolylineCurve::SetStartPoint ( ON_3dPoint start_point )

overridevirtual

virtual

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

Reimplemented from ON_Curve.

◆ SizeOf()

unsigned int ON_PolylineCurve::SizeOf ( ) const

overridevirtual

ON_Object overrides.

virtual ON_Object::SizeOf override

Reimplemented from ON_Curve.

◆ SpanCount()

int ON_PolylineCurve::SpanCount ( ) const

overridevirtual

Description: virtual ON_Curve::SpanCount override. Get number of segments in polyline. Returns: Number of segments in polyline.

Implements ON_Curve.

◆ Split()

bool ON_PolylineCurve::Split	(	double	,
		ON_Curve *&	,
		ON_Curve *&
	)		const

overridevirtual

Description: virtual ON_Curve::Split override.

Split() divides the polyline at the specified parameter. The parameter must be in the interior of the curve's domain. The pointers passed to ON_NurbsCurve::Split must either be nullptr or point to an ON_NurbsCurve. If the pointer is nullptr, then a curve will be created in Split(). You may pass "this" as one of the pointers to Split(). For example,

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.

Reimplemented from ON_Curve.

◆ SwapCoordinates()

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

overridevirtual

Description: virtual ON_Geometry::SwapCoordinates override. Swaps control point coordinate values with indices i and j. Parameters: i - [in] coordinate index j - [in] coordinate index

Reimplemented from ON_Geometry.

◆ Transform()

bool ON_PolylineCurve::Transform ( const ON_Xform & xform )

overridevirtual

Description: virtual ON_Geometry::Transform override. Transforms the NURBS curve.

Parameters: xform - [in] transformation to apply to object.

Remarks: When overriding this function, be sure to include a call to ON_Object::TransformUserData() which takes care of transforming any ON_UserData that may be attached to the object.

Reimplemented from ON_Curve.

◆ Trim()

bool ON_PolylineCurve::Trim ( const ON_Interval & )

overridevirtual

Description: virtual ON_Curve::Trim override.

Reimplemented from ON_Curve.

◆ Write()

bool ON_PolylineCurve::Write ( ON_BinaryArchive & binary_archive ) const

overridevirtual

Description: virtual ON_Object::Write override

Reimplemented from ON_Object.

Member Data Documentation

◆ m_dim

int ON_PolylineCurve::m_dim

2 or 3 (2 so ON_PolylineCurve can be uses as a trimming curve)

◆ m_pline

ON_Polyline ON_PolylineCurve::m_pline

◆ m_t

ON_SimpleArray<double> ON_PolylineCurve::m_t

parameters

Public Member Functions

Public Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ ON_PolylineCurve() [1/4]

◆ ~ON_PolylineCurve()

◆ ON_PolylineCurve() [2/4]

◆ ON_PolylineCurve() [3/4]

◆ ON_PolylineCurve() [4/4]

Member Function Documentation

◆ Append()

◆ ChangeClosedCurveSeam()

◆ ChangeDimension()

◆ DataCRC()

◆ Degree()

◆ Dimension()

◆ Domain()

◆ Dump()

◆ EmergencyDestroy()

◆ Evaluate()

◆ Extend()

◆ GetBBox()

◆ GetCurveParameterFromNurbFormParameter()

◆ GetNextDiscontinuity()

◆ GetNurbForm()

◆ GetNurbFormParameterFromCurveParameter()

◆ GetSpanVector()

◆ GetTightBoundingBox()

◆ HasNurbForm()

◆ IsArc()

◆ IsClosed()

◆ IsContinuous()

◆ IsDeformable()

◆ IsInPlane()

◆ IsLinear()

◆ IsPeriodic()

◆ IsPlanar()

◆ IsPolyline()

◆ IsValid()

◆ MakeDeformable()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ ParameterSearch()

◆ PointCount()

◆ Read()

◆ Reverse()

◆ SetDomain()

◆ SetEndPoint()

◆ SetStartPoint()

◆ SizeOf()

◆ SpanCount()

◆ Split()

◆ SwapCoordinates()

◆ Transform()

◆ Trim()

◆ Write()

Member Data Documentation

◆ m_dim

◆ m_pline

◆ m_t