SoNurbsProfile(3)

📦
version 4.0.10 · 4 versions
, in fedora 43, fedora 44

✨ NAME ✨

okay so bestie, meet SoNurbsProfile(3) from the Coin fam 💖 The SoNurbsProfile class is a node for specifying smooth profile curves. that's the whole vibe. smooth, curvy, iconic. 🦋

🌸 SYNOPSIS 🌸

#include <Inventor/nodes/SoNurbsProfile.h>

Inherits SoProfile. she's literally a child of SoProfile, nepo baby behavior but make it iconic 👑

🎀 Public Member Functions 🎀

  • virtual SoType getTypeId (void) const
  • SoNurbsProfile (void)
  • virtual void getTrimCurve (SoState *state, int32_t &numpoints, float *&points, int &floatspervec, int32_t &numknots, float *&knotvector)
  • virtual void getVertices (SoState *state, int32_t &numvertices, SbVec2f *&vertices)

🫶 Public Member Functions inherited from SoProfile 🫶

these ones came free with the family tree, no extra charge:

  • virtual void doAction (SoAction *action)
  • virtual void callback (SoCallbackAction *action)
  • virtual void GLRender (SoGLRenderAction *action)
  • virtual void getBoundingBox (SoGetBoundingBoxAction *action)
  • virtual void pick (SoPickAction *action)
  • virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

💜 Public Member Functions inherited from SoNode 💜

the whole SoNode starter pack, passed down like a family recipe:

  • void setOverride (const SbBool state)
  • SbBool isOverride (void) const
  • void setNodeType (const NodeType type)
  • NodeType getNodeType (void) const
  • virtual SoNode * copy (SbBool copyconnections=FALSE) const
  • virtual SbBool affectsState (void) const
  • virtual void GLRenderBelowPath (SoGLRenderAction *action)
  • virtual void GLRenderInPath (SoGLRenderAction *action)
  • virtual void GLRenderOffPath (SoGLRenderAction *action)
  • virtual void getMatrix (SoGetMatrixAction *action)
  • virtual void handleEvent (SoHandleEventAction *action)
  • virtual void rayPick (SoRayPickAction *action)
  • virtual void search (SoSearchAction *action)
  • virtual void write (SoWriteAction *action)
  • virtual void audioRender (SoAudioRenderAction *action)
  • virtual void grabEventsSetup (void)
  • virtual void grabEventsCleanup (void)
  • virtual void startNotify (void)
  • virtual void notify (SoNotList *l)
  • SbUniqueId getNodeId (void) const
  • virtual SoChildList * getChildren (void) const
  • virtual void writeInstance (SoOutput *out)
  • virtual SoNode * addToCopyDict (void) const
  • virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
  • virtual SoFieldContainer * copyThroughConnection (void) const

🍓 Public Member Functions inherited from SoFieldContainer 🍓

  • void setToDefaults (void)
  • SbBool hasDefaultValues (void) const
  • SbBool fieldsAreEqual (const SoFieldContainer *container) const
  • void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)
  • SbBool set (const char *const fielddata)
  • void get (SbString &fielddata)
  • virtual int getFields (SoFieldList &l) const
  • virtual int getAllFields (SoFieldList &l) const
  • virtual SoField * getField (const SbName &name) const
  • virtual SoField * getEventIn (const SbName &name) const
  • virtual SoField * getEventOut (const SbName &name) const
  • SbBool getFieldName (const SoField *const field, SbName &name) const
  • SbBool enableNotify (const SbBool flag)
  • SbBool isNotifyEnabled (void) const
  • SbBool set (const char *fielddata, SoInput *input)
  • void get (SbString &fielddata, SoOutput *out)
  • virtual SbBool validateNewFieldValue (SoField *field, void *newval)
  • virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
  • SbBool getIsBuiltIn (void) const
  • virtual void getFieldsMemorySize (size_t &managed, size_t &unmanaged) const
  • void setUserData (void *userdata) const
  • void * getUserData (void) const

🧚 Public Member Functions inherited from SoBase 🧚

  • void ref (void) const
  • void unref (void) const
  • void unrefNoDelete (void) const
  • int32_t getRefCount (void) const
  • void touch (void)
  • SbBool isOfType (SoType type) const — gives you back TRUE when the type of this object is either of the same type, or inherited from type. yes queen, bloodline check 🩸
  • virtual SbName getName (void) const
  • virtual void setName (const SbName &newname)
  • void addAuditor (void *const auditor, const SoNotRec::Type type)
  • void removeAuditor (void *const auditor, const SoNotRec::Type type)
  • const SoAuditorList & getAuditors (void) const
  • SbBool shouldWrite (void)
  • void assertAlive (void) const

⭐ Static Public Member Functions ⭐

  • static SoType getClassTypeId (void)
  • static void initClass (void) — sets up the initialization for data that all instances of this class share, like submitting the necessary info to the Coin type system. basically the group chat setup, one time, for everyone 💅

🌈 Static Public Member Functions inherited from SoProfile 🌈

  • static SoType getClassTypeId (void)
  • static void initClass (void) — same deal: it sets up initialization for the data common to all instances of this class, like submitting the necessary information to the Coin type system.

💫 Static Public Member Functions inherited from SoNode 💫

  • static uint32_t getCompatibilityTypes (const SoType &nodetype)
  • static SoType getClassTypeId (void)
  • static SoNode * getByName (const SbName &name)
  • static int getByName (const SbName &name, SoNodeList &l)
  • static void initClass (void) — yep, you guessed it: sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
  • static void initClasses (void)
  • static SbUniqueId getNextNodeId (void)
  • static int getActionMethodIndex (const SoType type)
  • static void getBoundingBoxS (SoAction *action, SoNode *node)
  • static void GLRenderS (SoAction *action, SoNode *node)
  • static void callbackS (SoAction *action, SoNode *node)
  • static void getMatrixS (SoAction *action, SoNode *node)
  • static void handleEventS (SoAction *action, SoNode *node)
  • static void pickS (SoAction *action, SoNode *node)
  • static void rayPickS (SoAction *action, SoNode *node)
  • static void searchS (SoAction *action, SoNode *node)
  • static void writeS (SoAction *action, SoNode *node)
  • static void audioRenderS (SoAction *action, SoNode *node)
  • static void getPrimitiveCountS (SoAction *action, SoNode *node)

🎀 Static Public Member Functions inherited from SoFieldContainer 🎀

  • static void initClass (void) — sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
  • static SoType getClassTypeId (void) — this static method hands you back the SoType object that's associated with objects of this class. very "who's your type" energy 😌
  • static void cleanupClass (void)
  • static void initCopyDict (void)
  • static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
  • static SoFieldContainer * checkCopy (const SoFieldContainer *orig)
  • static SoFieldContainer * findCopy (const SoFieldContainer *orig, const SbBool copyconnections)
  • static void copyDone (void)

🦋 Static Public Member Functions inherited from SoBase 🦋

  • static void initClass (void) — sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
  • static SoType getClassTypeId (void) — this static method returns the SoType object associated with objects of this class.
  • static void addName (SoBase *const base, const char *const name)
  • static void removeName (SoBase *const base, const char *const name)
  • static void incrementCurrentWriteCounter (void)
  • static void decrementCurrentWriteCounter (void)
  • static SoBase * getNamedBase (const SbName &name, SoType type)
  • static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
  • static SbBool read (SoInput *input, SoBase *&base, SoType expectedtype)
  • static void setInstancePrefix (const SbString &c)
  • static void setTraceRefs (SbBool trace)
  • static SbBool getTraceRefs (void)
  • static SbBool connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
  • static SbBool readRoute (SoInput *input)

👑 Public Attributes 👑

  • SoMFFloat knotVector — this is hers. the one field that's actually about her. slay 💅

🧵 Public Attributes inherited from SoProfile 🧵

  • SoMFInt32 index
  • SoSFEnum linkage

🙈 Protected Member Functions 🙈

  • virtual const SoFieldData * getFieldData (void) const
  • virtual ~SoNurbsProfile ()

🔒 Protected Member Functions inherited from SoProfile 🔒

  • SoProfile (void)
  • virtual ~SoProfile ()

🔒 Protected Member Functions inherited from SoNode 🔒

  • SoNode (void)
  • virtual ~SoNode ()
  • virtual SbBool readInstance (SoInput *in, unsigned short flags)

🔒 Protected Member Functions inherited from SoFieldContainer 🔒

  • SoFieldContainer (void)
  • virtual ~SoFieldContainer ()

🔒 Protected Member Functions inherited from SoBase 🔒

  • SoBase (void)
  • virtual ~SoBase ()
  • virtual void destroy (void)
  • SbBool hasMultipleWriteRefs (void) const
  • SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const
  • void writeFooter (SoOutput *out) const
  • virtual const char * getFileFormatName (void) const
  • virtual SoNotRec createNotRec (void)

🌟 Static Protected Member Functions 🌟

  • static const SoFieldData ** getFieldDataPtr (void)

🌟 Static Protected Member Functions inherited from SoProfile 🌟

  • static const SoFieldData ** getFieldDataPtr (void)

🌟 Static Protected Member Functions inherited from SoNode 🌟

  • static const SoFieldData ** getFieldDataPtr (void)
  • static void setNextActionMethodIndex (int index)
  • static int getNextActionMethodIndex (void)
  • static void incNextActionMethodIndex (void)
  • static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

🌟 Static Protected Member Functions inherited from SoBase 🌟

  • static uint32_t getCurrentWriteCounter (void)
  • static void staticDataLock (void)
  • static void staticDataUnlock (void)

💖 Additional Inherited Members 💖

🎀 Public Types inherited from SoProfile 🎀

enum Profile { START_FIRST = SoProfileElement::START_FIRST, START_NEW = SoProfileElement::START_NEW, ADD_TO_CURRENT = SoProfileElement::ADD_TO_CURRENT }

🎀 Public Types inherited from SoNode 🎀

enum NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002, INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010, INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080, COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 = 0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000, COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000, COIN_4_0 = 0x20000 }

🔒 Protected Types inherited from SoBase 🔒

enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

💜 Protected Attributes inherited from SoNode 💜

  • SbUniqueId uniqueId

💜 Protected Attributes inherited from SoFieldContainer 💜

  • SbBool isBuiltIn

⭐ Static Protected Attributes inherited from SoNode ⭐

  • static SbUniqueId nextUniqueId = 1
  • static int nextActionMethodIndex = 0

🌸 DETAILED DESCRIPTION 🌸

okay so SoNurbsProfile is a node for specifying smooth profile curves ✨ that's literally its whole job and it does it beautifully.

Use nodes of this type if you want to set up profiles that are smooth curves. bestie that is the vibe, that is the assignment 💅

Use ProfileCoordinate2 for nonrational profile curves where weight is 1.0 (which is the default, btw), and ProfileCoordinate3 for rational profile curves when you actually want to specify the weight. And weight? weight is lowkey analogous to having little magnets pulling on the curve 🧲 like imagine tiny invisible hands yanking your curve around, that's weight.

A typical usage case for SoNurbsProfile is to specify NURBS trimming curves. for example, feast your eyes 👀:

#Inventor V2.1 ascii

ShapeHints {
  vertexOrdering COUNTERCLOCKWISE
}

Coordinate3 {
  point [
    -3 -3 -3, -3 -1 -3, -3 1 -3, -3 3 -3,
    -1 -3 -3, -1 -1  3, -1 1  3, -1 3 -3,
     1 -3 -3,  1 -1  3,  1 1  3,  1 3 -3,
     3 -3 -3,  3 -1 -3,  3 1 -3,  3 3 -3
   ]
}

ProfileCoordinate2 {
  point [ 0.0 0.0 ,
          0.75 0.0,
          0.75 0.75 ,
          0.25 0.75 ,
          0.0 0.0  ]
}

NurbsProfile {
   index [ 0 , 1 , 2 , 3, 4 ]
   linkage START_NEW
   knotVector [ 0, 0, 0, 0, 0.5, 1, 1, 1, 1 ]
}

NurbsSurface {
  numUControlPoints 4
  numVControlPoints 4
  uKnotVector [ 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 ]
  vKnotVector [ 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 ]
}
heads up bestie 📢 the coordinates of the NurbsProfile live in the parametric space of the trimmed SoNurbsSurface, and the same complexity setting (which is calculated based on the dimensions of the bounding box of the NurbsSurface) is used to determine the sampling tolerance both for the SoNurbsSurface and the SoNurbsProfile. same setting, two jobs, she's booked and busy 💅

This means that if you want to change the tessellation of the trimming curve itself (i.e. increase or decrease the resolution of the boundaries of the "cut-out"), you should not change the SoComplexity setting but rather adapt the parametric scale in relation to the trimmed surface. do not touch the complexity dial, i am begging 🙈

As an example, to increase the resolution of the curve in the above example, replace...

ProfileCoordinate2 {
  point [ 0.0 0.0, 0.75 0.0, 0.75 0.75, 0.25 0.75, 0.0 0.0 ]
}

.. with...

ProfileCoordinate2 {
  point [ 0.0 0.0, 7.5 0.0, 7.5 7.5, 2.5 7.5, 0.0 0.0 ]
}

and change the uKnotVector and vKnotVector of the NurbsSurface to be

uKnotVector [ 0.0, 0.0, 0.0, 0.0, 10, 10, 10, 10 ]
vKnotVector [ 0.0, 0.0, 0.0, 0.0, 10, 10, 10, 10 ]

However, keep in mind that increasing the accuracy of the trimming curve results in a much more complex tessellation of the trimmed surface 😭 like you wanted detail, you got detail, and now everything is heavy. As a general rule of thumb, the extent of the trimming curve coordinates should never be greater than its "real" extents in relation to the trimmed surface, and often can be much lower. periodt.

If you find the above confusing, you probably do not want to use NURBS without reading up on the general concepts first. fr fr, no shame in it 🫶 An explanation of NURBS is beyond the scope of the Coin documentation; for detailed information, refer to the specialized literature on the topic (for example "An Introduction to NURBS: With HistoricalPerspective" by David F. Rogers). A basic overview of curve and surface rendering using NURBS can also be found in chapter 8 of "TheInventor Mentor". go read, i'll wait 📚✨

🎀 FILE FORMAT/DEFAULTS 🎀

here's what she looks like fresh out the box:

NurbsProfile {
    index 0
    linkage START_FIRST
    knotVector 0
}

💖 CONSTRUCTOR & DESTRUCTOR DOCUMENTATION 💖

🌟 SoNurbsProfile::SoNurbsProfile (void )

Constructor. she's born 🐣

🌟 SoNurbsProfile::~SoNurbsProfile () [protected], [virtual]

Destructor. she's gone 💀 (protected + virtual, so mind your inheritance manners)

✨ MEMBER FUNCTION DOCUMENTATION ✨

🦋 SoType SoNurbsProfile::getClassTypeId (void ) [static]

This static method returns the SoType object associated with objects of this class. it's the "hey what even are you" check 👑

🦋 SoType SoNurbsProfile::getTypeId (void ) const [virtual]

Returns the type identification of an object derived from a class inheriting SoBase. This is used for runtime type checking and "downward" casting. yes bestie, the whole system is clocking exactly what you are at runtime 🔍

Reimplemented from SoProfile.

🦋 const SoFieldData ** SoNurbsProfile::getFieldDataPtr (void ) [static], [protected]

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. (translation: not for you, bestie, that's dev business 🙈)

Returns the SoFieldData class which holds information about fields in this node.

🦋 const SoFieldData * SoNurbsProfile::getFieldData (void ) const [protected], [virtual]

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL. no fields? NULL. that's the whole tea ☕

Reimplemented from SoProfile.

🦋 void SoNurbsProfile::getTrimCurve (SoState * state, int32_t & numpoints, float *& points, int & floatspervec, int32_t & numknots, float *& knotvector) [virtual]

Return points and knotvector of the state. the actual curve data, handed over 🤲

Implements SoProfile.

🦋 void SoNurbsProfile::getVertices (SoState * state, int32_t & numvertices, SbVec2f *& vertices) [virtual]

Return vertex set of state. the vertices, as promised 🫶

Implements SoProfile.

💜 MEMBER DATA DOCUMENTATION 💜

⭐ SoMFFloat SoNurbsProfile::knotVector

Knot values for the NURBS curve. that's it, that's the field 🔥

👑 AUTHOR 👑

Generated automatically by Doxygen for Coin from the source code. (not me, i would never be this dry about it 😭 doxygen really said "no personality, only facts")

okay so that's the whole page bestie, we made it to the end 🏁✨ this was Coin version 4.0.10, dated Thu Jun 25 2026 00:00:00, and you were reading SoNurbsProfile(3) — slay, go build something gorgeous with it 💅💖🦋

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