SoVRMLNormalInterpolator(3)

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

💅 SoVRMLNormalInterpolator — the Coin manual page, bestie edition ✨

okay so this is the manual page for SoVRMLNormalInterpolator(3) from the Coin library. yes it's a mouthful, no we're not shortening it, it's iconic. sit down, grab a strawberry 🍓, and let's get into it.

🌸 NAME 🌸

SoVRMLNormalInterpolator — so like, the SoVRMLNormalInterpolator class is used to interpolate normals. that's the whole vibe. normals, interpolated. slay.

✨ SYNOPSIS ✨

to even use this you gotta pull it in like this:

#include <Inventor/VRMLnodes/SoVRMLNormalInterpolator.h>

it Inherits SoVRMLInterpolator. so it's part of that family tree, got it? 💖

🌈 Public Member Functions 🌈

the stuff you can actually call on an instance:

  • virtual SoType getTypeId (void) const
  • virtual const SoEngineOutputData * getOutputData (void) const
  • SoVRMLNormalInterpolator (void) — the constructor, obviously.

🦋 Public Member Functions inherited from SoNodeEngine

these come down from the parent, they're still yours tho:

  • void evaluateWrapper (void)
  • virtual int getOutputs (SoEngineOutputList &l) const
  • SoEngineOutput * getOutput (const SbName &outputname) const
  • SbBool getOutputName (const SoEngineOutput *output, SbName &outputname) const
  • SbBool isNotifying (void) const
  • virtual void notify (SoNotList *nl)
  • virtual void writeInstance (SoOutput *out)

🧚 Public Member Functions inherited from SoNode

the whole giant stack of node behaviour, bestie, buckle up:

  • 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 doAction (SoAction *action)
  • virtual void GLRender (SoGLRenderAction *action)
  • virtual void GLRenderBelowPath (SoGLRenderAction *action)
  • virtual void GLRenderInPath (SoGLRenderAction *action)
  • virtual void GLRenderOffPath (SoGLRenderAction *action)
  • virtual void callback (SoCallbackAction *action)
  • virtual void getBoundingBox (SoGetBoundingBoxAction *action)
  • virtual void getMatrix (SoGetMatrixAction *action)
  • virtual void handleEvent (SoHandleEventAction *action)
  • virtual void pick (SoPickAction *action)
  • virtual void rayPick (SoRayPickAction *action)
  • virtual void search (SoSearchAction *action)
  • virtual void write (SoWriteAction *action)
  • virtual void audioRender (SoAudioRenderAction *action)
  • virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
  • virtual void grabEventsSetup (void)
  • virtual void grabEventsCleanup (void)
  • virtual void startNotify (void)
  • SbUniqueId getNodeId (void) const
  • virtual SoChildList * getChildren (void) const
  • 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 — returns TRUE if the type of this object is either of the same type or inherited from type. periodt.
  • 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 ⭐

no instance needed, just call them straight up:

  • static SoType getClassTypeId (void)
  • static void * createInstance (void)
  • static void initClass (void)

🌸 Static Public Member Functions inherited from SoVRMLInterpolator

  • static SoType getClassTypeId (void)
  • static void initClass (void)

🫶 Static Public Member Functions inherited from SoNodeEngine

  • 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)

🦋 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) — 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 returns the SoType object associated with objects of this class.
  • 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 👑

the actual data, bestie:

  • SoMFVec3f keyValue
  • SoEngineOutput value_changed

🍓 Public Attributes inherited from SoVRMLInterpolator

  • SoMFFloat key
  • SoSFFloat set_fraction

💅 Protected Member Functions 💅

for the subclasses, the inner circle:

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

🦋 Protected Member Functions inherited from SoVRMLInterpolator

  • int getKeyValueIndex (float &interp, int numvalues)

✨ Protected Member Functions inherited from SoNodeEngine

  • SoNodeEngine (void)
  • virtual ~SoNodeEngine (void)
  • virtual SbBool readInstance (SoInput *in, unsigned short flags)
  • virtual void inputChanged (SoField *which)
  • void writeOutputTypes (SoOutput *out)

🌸 Protected Member Functions inherited from SoNode

  • SoNode (void)
  • virtual ~SoNode ()

💜 Protected Member Functions inherited from SoFieldContainer

  • SoFieldContainer (void)
  • virtual ~SoFieldContainer ()

🎀 Protected Member Functions inherited from SoBase

  • SoBase (void)
  • virtual ~SoBase ()
  • 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 const SoEngineOutputData ** getOutputDataPtr (void)

🌈 Static Protected Member Functions inherited from SoVRMLInterpolator

  • static const SoFieldData ** getFieldDataPtr (void)
  • static const SoEngineOutputData ** getOutputDataPtr (void)

⭐ Static Protected Member Functions inherited from SoNodeEngine

  • static const SoFieldData ** getFieldDataPtr (void)
  • static const SoEngineOutputData ** getOutputDataPtr (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 SoNode

the NodeType enum, and yes every single value matters, don't @ me:

  • 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

okay bestie we're not done yet, there's more coming in part 2 💖 don't go anywhere 🫶

🔒 Protected Attributes inherited from SoFieldContainer

  • SbBool isBuiltIn — just the one, bestie, and it's a lil SbBool telling you whether this thing was built in. That's the whole list. Short and iconic.

🔒 Static Protected Attributes inherited from SoNode

  • static SbUniqueId nextUniqueId = 1 — the global counter that hands out unique IDs to nodes, and she starts her count at 1 💅
  • static int nextActionMethodIndex = 0 — the little index tracker for action methods, kicking off at 0.

✨ Detailed Description ✨

So the SoVRMLNormalInterpolator class is used to interpolate normals. That's the whole vibe. Normals. Interpolated. Slay.

The detailed class documentation is taken verbatim from the VRML97 standard (ISO/IEC 14772-1:1997). It is copyright The Web3D Consortium, and is used by permission of the Consortium:
NormalInterpolator {
  eventIn      SFFloat set_fraction       # (-inf, inf)
  exposedField MFFloat key           []   # (-inf, inf)
  exposedField MFVec3f keyValue      []   # (-inf, inf)
  eventOut     MFVec3f value_changed
}

Okay so here's the tea 🍓 The NormalInterpolator node interpolates among a list of normal vector sets that you hand it in the keyValue field. The output vector, value_changed, shall be a set of normalized vectors — like, that's non-negotiable, bestie. And the values sitting in keyValue shall be of unit length. Periodt.

The number of normals in keyValue shall be an integer multiple of the number of keyframes in the key field, and that integer multiple is literally what defines how many normals end up inside the value_changed events. Math girlies stay winning 🔥

Normal interpolation shall be performed on the surface of the unit sphere. Translation: if you linearly interpolate from a point P on the unit sphere to a point Q that's also on the unit sphere, the output values land along the shortest arc on the unit sphere connecting P and Q. And equally spaced input fractions give you arcs of equal length. So pretty, so consistent 🦋

⚠️ The results are undefined if P and Q are diagonally opposite. Like, no cap, don't do that. That's a vibe check you will fail.

If you want a more detailed discussion of interpolators, it's provided in 4.6.8, Interpolator nodes at http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.6.8 — go read it, iykyk 📚

🛠️ Constructor & Destructor Documentation 🛠️

SoVRMLNormalInterpolator::SoVRMLNormalInterpolator (void )

Constructor. She is born ✨

SoVRMLNormalInterpolator::~SoVRMLNormalInterpolator () — [protected], [virtual]

Destructor. She leaves the chat 💀

🧚 Member Function Documentation 🧚

SoType SoVRMLNormalInterpolator::getClassTypeId (void ) — [static]

This static method returns the SoType object associated with objects of this class. Type ID? Returned. Instantly. 💅

SoType SoVRMLNormalInterpolator::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 for "downward" casting — the classic is this actually what I think it is move 👑

Reimplemented from SoVRMLInterpolator.

const SoFieldData ** SoVRMLNormalInterpolator::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. So like, mind your business bestie 🙈

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

const SoFieldData * SoVRMLNormalInterpolator::getFieldData (void ) const — [protected], [virtual]

Returns a pointer to the class-wide field data storage object for this instance. And if no fields are present? Returns NULL. Simple as 🌸

Reimplemented from SoVRMLInterpolator.

const SoEngineOutputData * SoVRMLNormalInterpolator::getOutputData (void ) const — [virtual]

Another one of those internal-to-the-library API members, not likely to be of interest to the application programmer. Same energy as before, we love a consistent queen.

Reimplemented from SoVRMLInterpolator.

void SoVRMLNormalInterpolator::initClass (void ) — [static]

That's the whole entry. initClass, static, void. No description given, she simply is. Lowkey mysterious, highkey iconic 🎀

💖 Member Data Documentation 💖

SoMFVec3f SoVRMLNormalInterpolator::keyValue

The keyValue vector. That's the description. Ten out of ten, no notes 🫶

SoEngineOutput SoVRMLNormalInterpolator::value_changed

The eventOut which is sent every time the interpolator has calculated a new value. So every single time she computes something new, she sends. Main character energy fr fr 📣

✍️ Author ✍️

Generated automatically by Doxygen for Coin from the source code. Not a human, not a girlie, just Doxygen doing her little autogenerated thing 🤖💜

And that's a wrap on SoVRMLNormalInterpolator(3), bestie! This page was Version 4.0.10, dated Thu Jun 25 2026 00:00:00 — go forth and interpolate those normals on the unit sphere, stay off the diagonally-opposite nonsense, and slay 💅✨🌸
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