#include <opennurbs_nurbssurface.h>

Inheritance diagram for ON_NurbsCage:

Public Member Functions
	ON_NurbsCage ()

	ON_NurbsCage (const ON_3dPoint *box_corners, int order0, int order1, int order2, int cv_count0, int cv_count1, int cv_count2)

	ON_NurbsCage (const ON_BezierCage &src)

	ON_NurbsCage (const ON_BoundingBox &bbox, int order0, int order1, int order2, int cv_count0, int cv_count1, int cv_count2)

	ON_NurbsCage (const ON_NurbsCage &src)

	ON_NurbsCage (int dim, bool is_rat, int order0, int order1, int order2, int cv_count0, int cv_count1, int cv_count2)

	~ON_NurbsCage ()

bool	ChangeDimension (int desired_dimension)

bool	ClampEnd (int dir, int end)

bool	Create (const ON_3dPoint *box_corners, int order0, int order1, int order2, int cv_count0, int cv_count1, int cv_count2)

bool	Create (const ON_BoundingBox &bbox, int order0, int order1, int order2, int cv_count0, int cv_count1, int cv_count2)

bool	Create (int dim, bool is_rat, int order0, int order1, int order2, int cv_count0, int cv_count1, int cv_count2)

double *	CV (int i, int j, int k) const

int	CVCount (int) const

int	CVCount (void) const

int	CVSize () const

ON::point_style	CVStyle () const

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

int	Degree (int dir) const

void	Destroy ()

void	DestroyRuntimeCache (bool bDelete=true) override

int	Dimension () const override

ON_Interval	Domain (int) const

void	Dump (ON_TextLog &text_log) const override

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

bool	Evaluate (double r, double s, double t, int der_count, int v_stride, double v, int side=0, int hint=0) const

bool	Extend (int dir, const ON_Interval &domain)

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

bool	GetCV (int i, int j, int k, ON::point_style, double *) const

bool	GetCV (int i, int j, int k, ON_3dPoint &) const

bool	GetCV (int i, int j, int k, ON_4dPoint &) const

bool	GetSpanVector (int dir, double *span_vector) const

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

double	GrevilleAbcissa (int dir, int gindex) const

bool	IncreaseDegree (int dir, int desired_degree)

bool	InsertKnot (int dir, double knot_value, int knot_multiplicity=1)

bool	IsClosed (int) const

bool	IsDeformable () const override

bool	IsMorphable () const override

ON_NurbsSurface *	IsoSurface (int dir, double c, ON_NurbsSurface *srf=0) const

bool	IsParallelogram (double tolerance) const

bool	IsPeriodic (int) const
	are duplicates of first degree many CVs.) More...

bool	IsRational () const

bool	IsSingular (int) const

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

double	Knot (int dir, int knot_index) const

int	KnotCount (int dir) const

bool	MakeDeformable () override

bool	MakeNonRational ()

bool	MakeRational ()

bool	Morph (const ON_SpaceMorph &morph) override

ON::object_type	ObjectType () const override

ON_NurbsCage &	operator= (const ON_BezierCage &src)

ON_NurbsCage &	operator= (const ON_NurbsCage &src)

int	Order (int dir) const

ON_3dPoint	PointAt (double r, double s, double t) const

ON_3dPoint	PointAt (ON_3dPoint rst) const

bool	Read (ON_BinaryArchive &archive) override

bool	ReserveCVCapacity (int cv_capacity)
	Tools for managing CV and knot memory. More...

bool	ReserveKnotCapacity (int dir, int cv_capacity)

bool	Reverse (int dir)

bool	SetCV (int i, int j, int k, const ON_3dPoint &point)

bool	SetCV (int i, int j, int k, const ON_4dPoint &hpoint)

bool	SetCV (int i, int j, int k, ON::point_style, const double *)

bool	SetKnot (int dir, int knot_index, double knot_value)

bool	SetWeight (int i, int j, int k, double w)

unsigned int	SizeOf () const override

int	SpanCount (int dir) const

bool	Transform (const ON_Xform &xform) override

bool	Transpose (int dir0, int dir1)

bool	Trim (int dir, const ON_Interval &domain)

double	Weight (int i, int j, int k) const

bool	Write (ON_BinaryArchive &archive) const override

bool	ZeroCVs ()
	zeros control vertices and, if rational, sets weights to 1 More...

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

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

virtual bool	SwapCoordinates (int i, int j)

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

Public Attributes
double *	m_cv

int	m_cv_capacity

int	m_cv_count [3]

int	m_cv_stride [3]

int	m_dim
	Implementation. More...

bool	m_is_rat

double *	m_knot [3]

int	m_knot_capacity [3]

int	m_order [3]

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
const static ON_Geometry	Unset

Constructor & Destructor Documentation

◆ ON_NurbsCage() [1/6]

ON_NurbsCage::ON_NurbsCage ( )

◆ ON_NurbsCage() [2/6]

ON_NurbsCage::ON_NurbsCage	(	int	dim,
		bool	is_rat,
		int	order0,
		int	order1,
		int	order2,
		int	cv_count0,
		int	cv_count1,
		int	cv_count2
	)

◆ ON_NurbsCage() [3/6]

ON_NurbsCage::ON_NurbsCage	(	const ON_BoundingBox &	bbox,
		int	order0,
		int	order1,
		int	order2,
		int	cv_count0,
		int	cv_count1,
		int	cv_count2
	)

◆ ON_NurbsCage() [4/6]

ON_NurbsCage::ON_NurbsCage	(	const ON_3dPoint *	box_corners,
		int	order0,
		int	order1,
		int	order2,
		int	cv_count0,
		int	cv_count1,
		int	cv_count2
	)

Parameters

box_corners array of 8 3d points

◆ ON_NurbsCage() [5/6]

ON_NurbsCage::ON_NurbsCage ( const ON_BezierCage & src )

◆ ~ON_NurbsCage()

ON_NurbsCage::~ON_NurbsCage ( )

◆ ON_NurbsCage() [6/6]

ON_NurbsCage::ON_NurbsCage ( const ON_NurbsCage & src )

Member Function Documentation

◆ ChangeDimension()

bool ON_NurbsCage::ChangeDimension ( int desired_dimension )

Parameters

desired_dimension desired_dimension

◆ ClampEnd()

bool ON_NurbsCage::ClampEnd	(	int	dir,
		int	end
	)

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"
end	0 = clamp start, 1 = clamp end, 2 = clamp start and end

◆ Create() [1/3]

bool ON_NurbsCage::Create	(	const ON_3dPoint *	box_corners,
		int	order0,
		int	order1,
		int	order2,
		int	cv_count0,
		int	cv_count1,
		int	cv_count2
	)

Description: Create a nurbs volume from a 3d box Parameters: box_corners - [in] 8 points that define corners of the volume

    7______________6
    |\             |\
    | \            | \
    |  \ _____________\
    |   4          |   5
    |   |          |   |
    |   |          |   |
    3---|----------2   |
    \   |          \   |
     \  |t          \  |
    s \ |            \ |
       \0_____________\1
               r

◆ Create() [2/3]

bool ON_NurbsCage::Create	(	const ON_BoundingBox &	bbox,
		int	order0,
		int	order1,
		int	order2,
		int	cv_count0,
		int	cv_count1,
		int	cv_count2
	)

Description: Create a Nurbs volume with corners defined by a bounding box. Parameters: box_corners - [in] 8 points that define corners of the volume

    7______________6
    |\             |\
    | \            | \
    |  \ _____________\
    |   4          |   5
    |   |          |   |
    |   |          |   |
    3---|----------2   |
    \   |          \   |
     \  |z          \  |
    y \ |            \ |
       \0_____________\1
               x

◆ Create() [3/3]

bool ON_NurbsCage::Create	(	int	dim,
		bool	is_rat,
		int	order0,
		int	order1,
		int	order2,
		int	cv_count0,
		int	cv_count1,
		int	cv_count2
	)

◆ CV()

double* ON_NurbsCage::CV	(	int	i,
		int	j,
		int	k
	)		const

Description: Expert user function to get a pointer to control vertex memory. If you are not an expert user, please use ON_NurbsCage::GetCV( ON_3dPoint& ) or ON_NurbsCage::GetCV( ON_4dPoint& ). Parameters: cv_index0 - [in] (0 <= cv_index0 < m_order[0]) cv_index1 - [in] (0 <= cv_index1 < m_order[1]) Returns: Pointer to control vertex. Remarks: If the Nurbs surface is rational, the format of the returned array is a homogeneous rational point with length m_dim+1. If the Nurbs surface is not rational, the format of the returned array is a nonrational euclidean point with length m_dim. See Also ON_NurbsCage::CVStyle ON_NurbsCage::GetCV ON_NurbsCage::Weight

◆ CVCount() [1/2]

int ON_NurbsCage::CVCount ( int ) const

◆ CVCount() [2/2]

int ON_NurbsCage::CVCount ( void ) const

◆ CVSize()

int ON_NurbsCage::CVSize ( ) const

◆ CVStyle()

ON::point_style ON_NurbsCage::CVStyle ( ) const

Description: Returns the style of control vertices in the m_cv array. Returns: @untitled table ON::not_rational m_is_rat is false ON::homogeneous_rational m_is_rat is true

◆ DataCRC()

ON__UINT32 ON_NurbsCage::DataCRC ( ON__UINT32 current_remainder ) const

overridevirtual

virtual ON_Object::DataCRC override

Reimplemented from ON_Object.

◆ Degree()

int ON_NurbsCage::Degree ( int dir ) const

◆ Destroy()

void ON_NurbsCage::Destroy ( )

◆ DestroyRuntimeCache()

void ON_NurbsCage::DestroyRuntimeCache ( bool bDelete = true )

overridevirtual

Description: Overrides the pure virtual ON_Object::DestroyRuntimeCache function. Saves the definition of this class in serial binary form that can be read by ON_BezierVolue::Read. Parameters: bDelete - [in] if true, the cache is deleted. If false, the pointers to the cache are set to zero; this is done when the cache memory was allocated from a pool that has been destroyed and an attempt to free the memory would result in a crash. Returns: True if successful.

Reimplemented from ON_Object.

◆ Dimension()

int ON_NurbsCage::Dimension ( ) const

overridevirtual

Description: Overrides virtual ON_Geometry::Dimension function. Gets a tight bounding box with respect to the coordinate system specified by the frame parameter. Parameters: bbox - [in/out] bGrowBox - [in] If true, the input bbox is grown to include this object's bounding box. frame - [in] if not null, this specifies the coordinate system frame. Returns: True if successful.

Reimplemented from ON_Geometry.

◆ Domain()

ON_Interval ON_NurbsCage::Domain ( int ) const

◆ Dump()

void ON_NurbsCage::Dump ( ON_TextLog & text_log ) const

overridevirtual

Description: Overrides the pure virtual ON_Object::Dump function. Parameters: text_log - [in] A listing of the values of the members.

Reimplemented from ON_Object.

◆ EmergencyDestroy()

void ON_NurbsCage::EmergencyDestroy ( )

call if memory used by ON_NurbsCage becomes invalid

◆ Evaluate()

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

Description: Evaluate the NURBS cage Parameters: r - [in] s - [in] t - [in] (r,s,t) = evaluation parameters der_count - [in] (>= 0) v_stride - [in] (>= m_dim) v - [out] An array of length v_stride*(der_count+1)(der_count+2)*(der_count+3)/6. The evaluation results are stored in this array.

P = v[0],...,v[m_dim-1] Dr = v[v_stride],... Ds = v[2*v_stride],... Dt = v[3*v_stride],...

In general, Dr^i Ds^j Dt^k is returned in v[n],...,v[n+m_dim-1], where

d = (i+j+k) n = v_stride*( d*(d+1)*(d+2)/6 + (j+k)*(j+k+1)/2 + k)

side - [in] specifies the span to use for the evaluation when r, s, or t is at a knot value. 0 = default 1 = from upper NE quadrant 2 = from upper NW quadrant 3 = from upper SW quadrant 4 = from upper SE quadrant 5 = from lower NE quadrant 6 = from lower NW quadrant 7 = from lower SW quadrant 8 = from lower SE quadrant
hint - [in/out] If a bunch of evaluations will be performed that tend to occur in the same region, then hint[3] can be used to speed the search for the evaluation span. The input value is used as a search hint and the output value records the span used for that evaluation. Example:

    int der_count = 2;
    int v_stride = dim;
    double v[v_stride*(der_count+1)*(der_count+2)*(der_count+3)/6];
    int side = 0;
    int hint[3]; hint[0] = 0; hint[1] = 0; hint[2] = 0;
    bool rc = cage.Evaluate(r,s,t,der_count,v_stride,v,side,hint);

    ON_3dPoint P = v;

/ first order partial derivatives ON_3dVector Dr = v + v_stride; ON_3dVector Ds = v + 2*v_stride; ON_3dVector Dt = v + 3*v_stride;

/ second order partial derivatives ON_3dVector Drr = v + 4*v_stride; ON_3dVector Drs = v + 5*v_stride; ON_3dVector Drt = v + 6*v_stride; ON_3dVector Dss = v + 7*v_stride; ON_3dVector Dst = v + 8*v_stride; ON_3dVector Dtt = v + 8*v_stride;

Returns: True if successful See Also: ON_NurbsCage::PointAt

◆ Extend()

bool ON_NurbsCage::Extend	(	int	dir,
		const ON_Interval &	domain
	)

◆ GetBBox()

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

overridevirtual

virtual ON_Geometry GetBBox override

Reimplemented from ON_Geometry.

◆ GetCV() [1/3]

bool ON_NurbsCage::GetCV	(	int	i,
		int	j,
		int	k,
		ON::point_style	,
		double *
	)		const

Parameters

i	get a single control vertex

◆ GetCV() [2/3]

bool ON_NurbsCage::GetCV	(	int	i,
		int	j,
		int	k,
		ON_3dPoint &
	)		const

Parameters

i	get a single control vertex

◆ GetCV() [3/3]

bool ON_NurbsCage::GetCV	(	int	i,
		int	j,
		int	k,
		ON_4dPoint &
	)		const

Parameters

i	get a single control vertex

◆ GetSpanVector()

bool ON_NurbsCage::GetSpanVector	(	int	dir,
		double *	span_vector
	)		const

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"

◆ GetTightBoundingBox()

bool ON_NurbsCage::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_Geometry.

◆ GrevilleAbcissa()

double ON_NurbsCage::GrevilleAbcissa	(	int	dir,
		int	gindex
	)		const

Parameters

dir	dir
gindex	index (0 <= index < CVCount(dir)

◆ IncreaseDegree()

bool ON_NurbsCage::IncreaseDegree	(	int	dir,
		int	desired_degree
	)

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"
desired_degree	desired_degree

◆ InsertKnot()

bool ON_NurbsCage::InsertKnot	(	int	dir,
		double	knot_value,
		int	knot_multiplicity = `1`
	)

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"
knot_value	value of knot
knot_multiplicity	multiplicity of knot ( >= 1 and <= degree )

◆ IsClosed()

bool ON_NurbsCage::IsClosed ( int ) const

CV = euclidean location of end CV, or cage is periodic.)

◆ IsDeformable()

bool ON_NurbsCage::IsDeformable ( ) const

overridevirtual

Description: Overrides virtual ON_Geometry::IsDeformable function. Returns: True because a NURBS volume can be accurately modified with "squishy" transformations like projections, shears, an non-uniform scaling.

Reimplemented from ON_Geometry.

◆ IsMorphable()

bool ON_NurbsCage::IsMorphable ( ) const

overridevirtual

Description: Overrides virtual ON_Geometry::IsMorphable function. Returns: True because NURBS volumes can be morphed by calling Morph().

Reimplemented from ON_Geometry.

◆ IsoSurface()

ON_NurbsSurface* ON_NurbsCage::IsoSurface	(	int	dir,
		double	c,
		ON_NurbsSurface *	srf = `0`
	)		const

◆ IsParallelogram()

bool ON_NurbsCage::IsParallelogram ( double tolerance ) const

Returns: True if the cage is a parallelogram within the tolerance. This means the cage can be used as a starting point for cage deformations.

◆ IsPeriodic()

bool ON_NurbsCage::IsPeriodic ( int ) const

are duplicates of first degree many CVs.)

◆ IsRational()

bool ON_NurbsCage::IsRational ( ) const

◆ IsSingular()

bool ON_NurbsCage::IsSingular ( int ) const

◆ IsValid()

bool ON_NurbsCage::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.

◆ Knot()

double ON_NurbsCage::Knot	(	int	dir,
		int	knot_index
	)		const

Parameters: dir - [in] 0 = "r", 1 = "s", 2 = "t" knot_index - [in] 0 <= knot_index < KnotCount(dir) Returns: Value of knot or ON_UNSET_VALUE if input parameters are not valid.

◆ KnotCount()

int ON_NurbsCage::KnotCount ( int dir ) const

Parameters

dir	total number of knots in knot vector dir 0 = "r", 1 = "s", 2 = "t"

◆ MakeDeformable()

bool ON_NurbsCage::MakeDeformable ( )

overridevirtual

Description: Overrides virtual ON_Geometry::MakeDeformable function. Returns: True because NURBS volumes are deformable.

Reimplemented from ON_Geometry.

◆ MakeNonRational()

bool ON_NurbsCage::MakeNonRational ( )

◆ MakeRational()

bool ON_NurbsCage::MakeRational ( )

◆ Morph()

bool ON_NurbsCage::Morph ( const ON_SpaceMorph & morph )

override

Description: Overrides virtual ON_Geometry::Morph function. Applies the space morph to the NURBS volume's control points. Parameters: morph - [in] Returns: True is successful.

◆ ObjectType()

ON::object_type ON_NurbsCage::ObjectType ( ) const

overridevirtual

Description: Overrides the pure virtual ON_Object::ObjectType function. Saves the definition of this class in serial binary form that can be read by ON_BezierVolue::Read. Parameters: archive - [in] target archive Returns: True if successful.

Reimplemented from ON_Object.

◆ operator=() [1/2]

ON_NurbsCage& ON_NurbsCage::operator= ( const ON_BezierCage & src )

◆ operator=() [2/2]

ON_NurbsCage& ON_NurbsCage::operator= ( const ON_NurbsCage & src )

◆ Order()

int ON_NurbsCage::Order ( int dir ) const

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"

◆ PointAt() [1/2]

ON_3dPoint ON_NurbsCage::PointAt	(	double	r,
		double	s,
		double	t
	)		const

Description: Evaluates bezier volume map. Parameters: rst - [in] Returns: Value of the nurbs volume map at (r,s,t).

◆ PointAt() [2/2]

ON_3dPoint ON_NurbsCage::PointAt ( ON_3dPoint rst ) const

Description: Evaluates bezier volume map. Parameters: rst - [in] Returns: Value of the nurbs volume map at (rst.x,rst.y,rst.z).

◆ Read()

bool ON_NurbsCage::Read ( ON_BinaryArchive & archive )

overridevirtual

Description: Overrides the pure virtual ON_Object::Read function. Reads the definition of this class from an archive previously saved by ON_BezierVolue::Write. Parameters: archive - [in] target archive Returns: True if successful.

Reimplemented from ON_Object.

◆ ReserveCVCapacity()

bool ON_NurbsCage::ReserveCVCapacity ( int cv_capacity )

Tools for managing CV and knot memory.

Description: cv_capacity - [in] number of doubles to reserve

◆ ReserveKnotCapacity()

bool ON_NurbsCage::ReserveKnotCapacity	(	int	dir,
		int	cv_capacity
	)

◆ Reverse()

bool ON_NurbsCage::Reverse ( int dir )

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"

◆ SetCV() [1/3]

bool ON_NurbsCage::SetCV	(	int	i,
		int	j,
		int	k,
		const ON_3dPoint &	point
	)

set a single control vertex If NURBS is rational, weight will be set to 1.

◆ SetCV() [2/3]

bool ON_NurbsCage::SetCV	(	int	i,
		int	j,
		int	k,
		const ON_4dPoint &	hpoint
	)

set a single control vertex value of control vertex If NURBS is not rational, euclidean location of homogeneous point will be used.

◆ SetCV() [3/3]

bool ON_NurbsCage::SetCV	(	int	i,
		int	j,
		int	k,
		ON::point_style	,
		const double *
	)

Parameters

i	set a single control vertex

◆ SetKnot()

bool ON_NurbsCage::SetKnot	(	int	dir,
		int	knot_index,
		double	knot_value
	)

Parameters: dir - [in] 0 = "r", 1 = "s", 2 = "t" knot_index - [in] 0 <= knot_index < KnotCount(dir) knot_value - [in] Returns: True if dir and knot_index parameters were valid and knot value was set.

◆ SetWeight()

bool ON_NurbsCage::SetWeight	(	int	i,
		int	j,
		int	k,
		double	w
	)

Parameters

i	get value of control vertex weight

◆ SizeOf()

unsigned int ON_NurbsCage::SizeOf ( ) const

overridevirtual

Description: Overrides the pure virtual ON_Object::SizeOf function. Returns: An estimate of the amount of memory used by the class and its members.

Reimplemented from ON_Object.

◆ SpanCount()

int ON_NurbsCage::SpanCount ( int dir ) const

Parameters

dir	dir 0 = "r", 1 = "s", 2 = "t"

◆ Transform()

bool ON_NurbsCage::Transform ( const ON_Xform & xform )

overridevirtual

Description: Overrides virtual ON_Geometry::Transform function. Transforms NURBS volume. Parameters: xform - [in] Returns: true if successful.

Reimplemented from ON_Geometry.

◆ Transpose()

bool ON_NurbsCage::Transpose	(	int	dir0,
		int	dir1
	)

◆ Trim()

bool ON_NurbsCage::Trim	(	int	dir,
		const ON_Interval &	domain
	)

◆ Weight()

double ON_NurbsCage::Weight	(	int	i,
		int	j,
		int	k
	)		const

Parameters

i	get value of control vertex weight

◆ Write()

bool ON_NurbsCage::Write ( ON_BinaryArchive & archive ) const

overridevirtual

Description: Overrides the pure virtual ON_Object::Write function. Saves the definition of this class in serial binary form that can be read by ON_BezierVolue::Read. Parameters: archive - [in] target archive Returns: True if successful.

Reimplemented from ON_Object.

◆ ZeroCVs()

bool ON_NurbsCage::ZeroCVs ( )

zeros control vertices and, if rational, sets weights to 1

Member Data Documentation

◆ m_cv

double* ON_NurbsCage::m_cv

◆ m_cv_capacity

int ON_NurbsCage::m_cv_capacity

◆ m_cv_count

int ON_NurbsCage::m_cv_count[3]

◆ m_cv_stride

int ON_NurbsCage::m_cv_stride[3]

◆ m_dim

int ON_NurbsCage::m_dim

Implementation.

NOTE: These members are left "public" so that expert users may efficiently create nurbs curves using the default constructor and borrow the knot and CV arrays from their native NURBS representation. No technical support will be provided for users who access these members directly. If you can't get your stuff to work, then use the constructor with the arguments and the SetKnot() and SetCV() functions to fill in the arrays.

◆ m_is_rat

bool ON_NurbsCage::m_is_rat

◆ m_knot

double* ON_NurbsCage::m_knot[3]

◆ m_knot_capacity

int ON_NurbsCage::m_knot_capacity[3]

◆ m_order

int ON_NurbsCage::m_order[3]

Public Member Functions

Public Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ ON_NurbsCage() [1/6]

◆ ON_NurbsCage() [2/6]

◆ ON_NurbsCage() [3/6]

◆ ON_NurbsCage() [4/6]

◆ ON_NurbsCage() [5/6]

◆ ~ON_NurbsCage()

◆ ON_NurbsCage() [6/6]

Member Function Documentation

◆ ChangeDimension()

◆ ClampEnd()

◆ Create() [1/3]

◆ Create() [2/3]

◆ Create() [3/3]

◆ CV()

◆ CVCount() [1/2]

◆ CVCount() [2/2]

◆ CVSize()

◆ CVStyle()

◆ DataCRC()

◆ Degree()

◆ Destroy()

◆ DestroyRuntimeCache()

◆ Dimension()

◆ Domain()

◆ Dump()

◆ EmergencyDestroy()

◆ Evaluate()

◆ Extend()

◆ GetBBox()

◆ GetCV() [1/3]

◆ GetCV() [2/3]

◆ GetCV() [3/3]

◆ GetSpanVector()

◆ GetTightBoundingBox()

◆ GrevilleAbcissa()

◆ IncreaseDegree()

◆ InsertKnot()

◆ IsClosed()

◆ IsDeformable()

◆ IsMorphable()

◆ IsoSurface()

◆ IsParallelogram()

◆ IsPeriodic()

◆ IsRational()

◆ IsSingular()

◆ IsValid()

◆ Knot()

◆ KnotCount()

◆ MakeDeformable()

◆ MakeNonRational()

◆ MakeRational()

◆ Morph()

◆ ObjectType()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ Order()

◆ PointAt() [1/2]

◆ PointAt() [2/2]

◆ Read()

◆ ReserveCVCapacity()

◆ ReserveKnotCapacity()

◆ Reverse()

◆ SetCV() [1/3]

◆ SetCV() [2/3]

◆ SetCV() [3/3]

◆ SetKnot()

◆ SetWeight()

◆ SizeOf()

◆ SpanCount()

◆ Transform()

◆ Transpose()

◆ Trim()

◆ Weight()

◆ Write()

◆ ZeroCVs()

Member Data Documentation