Rhino C++ API  7.18
Public Member Functions | Public Attributes | List of all members
ON_NurbsCage Class Reference

#include <opennurbs_nurbssurface.h>

Inheritance diagram for ON_NurbsCage:
ON_Geometry ON_Object

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_NurbsSurfaceIsoSurface (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_NurbsCageoperator= (const ON_BezierCage &src)
 
ON_NurbsCageoperator= (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_BrepBrepForm (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_Geometryoperator= (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)
 
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_UserDataFirstUserData () const
 
virtual unsigned int GetComponentsWithSetStates (ON_ComponentStatus states_filter, bool bAllEqualStates, ON_SimpleArray< ON_COMPONENT_INDEX > &components) const
 
class ON_UserDataGetUserData (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_Objectoperator= (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_cornersarray 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_dimensiondesired_dimension

◆ ClampEnd()

bool ON_NurbsCage::ClampEnd ( int  dir,
int  end 
)
Parameters
dirdir 0 = "r", 1 = "s", 2 = "t"
end0 = 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 homogeneos 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
iget a single control vertex

◆ GetCV() [2/3]

bool ON_NurbsCage::GetCV ( int  i,
int  j,
int  k,
ON_3dPoint  
) const
Parameters
iget a single control vertex

◆ GetCV() [3/3]

bool ON_NurbsCage::GetCV ( int  i,
int  j,
int  k,
ON_4dPoint  
) const
Parameters
iget a single control vertex

◆ GetSpanVector()

bool ON_NurbsCage::GetSpanVector ( int  dir,
double *  span_vector 
) const
Parameters
dirdir 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
dirdir
gindexindex (0 <= index < CVCount(dir)

◆ IncreaseDegree()

bool ON_NurbsCage::IncreaseDegree ( int  dir,
int  desired_degree 
)
Parameters
dirdir 0 = "r", 1 = "s", 2 = "t"
desired_degreedesired_degree

◆ InsertKnot()

bool ON_NurbsCage::InsertKnot ( int  dir,
double  knot_value,
int  knot_multiplicity = 1 
)
Parameters
dirdir 0 = "r", 1 = "s", 2 = "t"
knot_valuevalue of knot
knot_multiplicitymultiplicity 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 accuratly 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 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: @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
dirtotal 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
dirdir 0 = "r", 1 = "s", 2 = "t"

◆ PointAt() [1/2]

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

Description: Evaluates bezer 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 bezer 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
dirdir 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
iset 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
iget 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
dirdir 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
iget 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]