--- name: "SoIndexedFaceSet" section: "3" platform: "linux" package: "coin" version: "1:4.0.10-1" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/SoIndexedFaceSet" --- # SoIndexedFaceSet(3) The SoIndexedFaceSet class is used to handle generic indexed facesets. ## NAME SoIndexedFaceSet - The **SoIndexedFaceSet** class is used to handle generic indexed facesets. ## SYNOPSIS \#include \ Inherits **SoIndexedShape**. ### Public Member Functions virtual **SoType** **getTypeId** (void) const\ **SoIndexedFaceSet** (void)\ virtual void **GLRender** (**SoGLRenderAction** \*action)\ virtual void **getPrimitiveCount** (**SoGetPrimitiveCountAction** \*action)\ virtual SbBool **generateDefaultNormals** (**SoState** \*state, **SoNormalBundle** \*bundle)\ virtual SbBool **generateDefaultNormals** (**SoState** \*state, **SoNormalCache** \*cache)\ Public Member Functions inherited from **SoVertexShape** virtual void **write** (**SoWriteAction** \*action)\ Public Member Functions inherited from **SoShape** virtual SbBool **affectsState** (void) const\ virtual void **getBoundingBox** (**SoGetBoundingBoxAction** \*action)\ virtual void **rayPick** (**SoRayPickAction** \*action)\ virtual void **callback** (**SoCallbackAction** \*action)\ const **SoBoundingBoxCache** \* **getBoundingBoxCache** (void) const\ Public Member Functions inherited from **SoNode** 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 void **doAction** (**SoAction** \*action)\ 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 **pick** (**SoPickAction** \*action)\ virtual void **search** (**SoSearchAction** \*action)\ virtual void **audioRender** (**SoAudioRenderAction** \*action)\ virtual void **grabEventsSetup** (void)\ virtual void **grabEventsCleanup** (void)\ virtual void **startNotify** (void)\ 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\ Returns TRUE if the type of this object is either of the same type or inherited from *type*. 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)\ Static Public Member Functions inherited from **SoIndexedShape** static **SoType** **getClassTypeId** (void)\ static void **initClass** (void)\ Static Public Member Functions inherited from **SoVertexShape** static **SoType** **getClassTypeId** (void)\ static void **initClass** (void)\ Static Public Member Functions inherited from **SoShape** static **SoType** **getClassTypeId** (void)\ 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 **getScreenSize** (**SoState** \*const state, const **SbBox3f** &boundingbox, **SbVec2s** &rectsize)\ static float **getDecimatedComplexity** (**SoState** \*state, float complexity)\ 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)\ ### Protected Member Functions virtual const **SoFieldData** \* **getFieldData** (void) const\ virtual **~SoIndexedFaceSet** ()\ virtual void **generatePrimitives** (**SoAction** \*action)\ Protected Member Functions inherited from **SoIndexedShape** **SoIndexedShape** (void)\ virtual **~SoIndexedShape** ()\ virtual void **computeBBox** (**SoAction** \*action, **SbBox3f** &box, **SbVec3f** ¢er)\ int **getNumVerts** (const int startCoord)\ void **setupIndices** (const int numParts, const int numFaces, const SbBool needNormals, const SbBool needTexCoords)\ const int32\_t \* **getNormalIndices** (void)\ const int32\_t \* **getColorIndices** (void)\ const int32\_t \* **getTexCoordIndices** (void)\ SbBool **getVertexData** (**SoState** \*state, const **SoCoordinateElement** \*&coords, const **SbVec3f** \*&normals, const int32\_t \*&cindices, const int32\_t \*&nindices, const int32\_t \*&tindices, const int32\_t \*&mindices, int &numcindices, const SbBool needNormals, SbBool &normalCacheUsed)\ Protected Member Functions inherited from **SoVertexShape** **SoVertexShape** (void)\ virtual **~SoVertexShape** ()\ virtual SbBool **shouldGLRender** (**SoGLRenderAction** \*action)\ void **setNormalCache** (**SoState** \*const state, const int num, const **SbVec3f** \*normals)\ **SoNormalCache** \* **getNormalCache** (void) const\ **SoNormalCache** \* **generateAndReadLockNormalCache** (**SoState** \*const state)\ void **getVertexData** (**SoState** \*state, const **SoCoordinateElement** \*&coords, const **SbVec3f** \*&normals, const SbBool neednormals)\ void **readLockNormalCache** (void)\ void **readUnlockNormalCache** (void)\ Protected Member Functions inherited from **SoShape** **SoShape** (void)\ virtual **~SoShape** ()\ float **getComplexityValue** (**SoAction** \*action)\ void **beginSolidShape** (**SoGLRenderAction** \*action)\ void **endSolidShape** (**SoGLRenderAction** \*action)\ void **GLRenderBoundingBox** (**SoGLRenderAction** \*action)\ SbBool **shouldPrimitiveCount** (**SoGetPrimitiveCountAction** \*action)\ SbBool **shouldRayPick** (**SoRayPickAction** \*const action)\ void **computeObjectSpaceRay** (**SoRayPickAction** \*const action)\ void **computeObjectSpaceRay** (**SoRayPickAction** \*const action, const **SbMatrix** &matrix)\ virtual **SoDetail** \* **createTriangleDetail** (**SoRayPickAction** \*action, const **SoPrimitiveVertex** \*v1, const **SoPrimitiveVertex** \*v2, const **SoPrimitiveVertex** \*v3, **SoPickedPoint** \*pp)\ virtual **SoDetail** \* **createLineSegmentDetail** (**SoRayPickAction** \*action, const **SoPrimitiveVertex** \*v1, const **SoPrimitiveVertex** \*v2, **SoPickedPoint** \*pp)\ virtual **SoDetail** \* **createPointDetail** (**SoRayPickAction** \*action, const **SoPrimitiveVertex** \*v, **SoPickedPoint** \*pp)\ void **invokeTriangleCallbacks** (**SoAction** \*const action, const **SoPrimitiveVertex** \*const v1, const **SoPrimitiveVertex** \*const v2, const **SoPrimitiveVertex** \*const v3)\ void **invokeLineSegmentCallbacks** (**SoAction** \*const action, const **SoPrimitiveVertex** \*const v1, const **SoPrimitiveVertex** \*const v2)\ void **invokePointCallbacks** (**SoAction** \*const action, const **SoPrimitiveVertex** \*const v)\ void **beginShape** (**SoAction** \*const action, const **TriangleShape** shapetype, **SoDetail** \*const detail=NULL)\ void **shapeVertex** (const **SoPrimitiveVertex** \*const v)\ void **endShape** (void)\ void **generateVertex** (**SoPrimitiveVertex** \*const pv, const **SbVec3f** &point, const SbBool useTexFunc, const **SoMultiTextureCoordinateElement** \*const tce, const float s, const float t, const **SbVec3f** &normal)\ void **generateVertex** (**SoPrimitiveVertex** \*const pv, const **SbVec3f** &point, const SbBool useTexFunc, const **SoMultiTextureCoordinateElement** \*const tce, const float s, const float t, const float r, const **SbVec3f** &normal)\ SbBool **startVertexArray** (**SoGLRenderAction** \*action, const **SoCoordinateElement** \*coords, const **SbVec3f** \*pervertexnormals, const SbBool texpervertex, const SbBool colorpervertex)\ void **finishVertexArray** (**SoGLRenderAction** \*action, const SbBool vbo, const SbBool normpervertex, const SbBool texpervertex, const SbBool colorpervertex)\ 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 **SoIndexedShape** static const **SoFieldData** \*\* **getFieldDataPtr** (void)\ static SbBool **areTexCoordsIndexed** (**SoAction** \*action)\ Static Protected Member Functions inherited from **SoVertexShape** static const **SoFieldData** \*\* **getFieldDataPtr** (void)\ Static Protected Member Functions inherited from **SoShape** 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 **SoShape** enum **TriangleShape** { **TRIANGLE\_STRIP**, **TRIANGLE\_FAN**, **TRIANGLES**, **POLYGON**, **QUADS**, **QUAD\_STRIP**, **POINTS**, **LINES**, **LINE\_STRIP** }\ 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 }\ Public Attributes inherited from **SoIndexedShape** **SoMFInt32** **coordIndex**\ **SoMFInt32** **materialIndex**\ **SoMFInt32** **normalIndex**\ **SoMFInt32** **textureCoordIndex**\ Public Attributes inherited from **SoVertexShape** **SoSFNode** **vertexProperty**\ 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 The **SoIndexedFaceSet** class is used to handle generic indexed facesets. Facesets are specified using the coordIndex field. Each face must be terminated by a negative (-1) index. Coordinates, normals, materials and texture coordinates from the current state (or from the vertexProperty node if set), can be indexed to create triangles, quads or polygons. Here's a usage example of just about the simplest possible use of this node, to show a single polygon face: ``` #Inventor V2.1 ascii Separator { Coordinate3 { point [ 0 0 0, 1 0 0, 1 1 0 ] } IndexedFaceSet { coordIndex [ 0, 1, 2, -1 ] } } ``` Binding PER\_VERTEX\_INDEXED, PER\_VERTEX, PER\_FACE\_INDEXED, PER\_FACE or OVERALL can be set for material, and normals. The default material binding is OVERALL. The default normal binding is PER\_VERTEX\_INDEXED. When PER\_VERTEX\_INDEXED binding is used and the corresponding materialIndex, normalIndex, texCoordIndex field is empty, the coordIndex field will be used to index material, normal or texture coordinate. If you do specify indices for material, normals or texture coordinates for PER\_VERTEX\_INDEXED binding, make sure your index array matches the coordIndex array: there should be a -1 wherever there is a -1 in the coordIndex field. This is done to make this node more easily readable for humans. A fairly common request when rendering facesets is how to display a set of faces with different colors on the backside versus the frontside. There is not *direct* support for this in the API, but it can easily be implemented by duplicating all faces in both the **SoShapeHints::COUNTERCLOCKWISE** and the **SoShapeHints::CLOCKWISE** order. Here is a simple usage example, showing the technique for a single polygon, using two **SoFaceSet** nodes for rendering the same polygon from both sides: ``` #Inventor V2.1 ascii Separator { Coordinate3 { point [ 0 0 0, 1 0 0, 1 1 0 ] } Separator { Material { diffuseColor [ 1 1 0 ] } ShapeHints { vertexOrdering COUNTERCLOCKWISE shapeType SOLID } FaceSet { numVertices [ 3 ] } } Separator { Material { diffuseColor [ 1 0 0 ] } ShapeHints { vertexOrdering CLOCKWISE shapeType SOLID } FaceSet { numVertices [ 3 ] } } } ``` The same effect can also be done in the following manner, using an **SoIndexedFaceSet** to explicitly render the polygon coordinates in both directions (clockwise and counterclockwise): ``` #Inventor V2.1 ascii Separator { Coordinate3 { point [ 0 0 0, 1 0 0, 1 1 0 ] } Material { diffuseColor [ 1 0 0, 1 1 0 ] } MaterialBinding { value PER_FACE_INDEXED } ShapeHints { vertexOrdering COUNTERCLOCKWISE shapeType SOLID } IndexedFaceSet { coordIndex [ 0, 1, 2, -1, 2, 1, 0, -1 ] materialIndex [ 0, 1 ] } } ``` Another rather rare issue that might be interesting to know about is that to render polygons with concave borders, you should set up an **SoShapeHints** node with **SoShapeHints::faceType** set to **SoShapeHints::UNKNOWN\_FACE\_TYPE** in the scene graph before the **SoIndexedFaceSet** (or **SoFaceSet**) node. This needs to be done to force the rendering code to tessellate the polygons properly to triangles before sending it off to OpenGL. Without it, the polygons will be sent as-is to OpenGL, and the OpenGL implementation's tessellator is often not able to tessellate properly. Here is an example which usually fails without the **SoShapeHints** node (try commenting it out, and see what happens): ``` #Inventor V2.1 ascii ShapeHints { faceType UNKNOWN_FACE_TYPE } Coordinate3 { point [ 2 0 0, 1 0 0, 1 1 0, 0 1 0, 0 2 0, 1 2 0, 2 2 0, 2 1 0 ] } FaceSet {} ``` **FILE FORMAT/DEFAULTS:** ``` IndexedFaceSet { vertexProperty NULL coordIndex 0 materialIndex -1 normalIndex -1 textureCoordIndex -1 } ``` **See also** **SoFaceSet**, **SoIndexedTriangleStripSet** ## Constructor & Destructor Documentation ### SoIndexedFaceSet::SoIndexedFaceSet (void ) Constructor. ### SoIndexedFaceSet::~SoIndexedFaceSet () \[protected\], \[virtual\] Destructor. ## Member Function Documentation ### SoType SoIndexedFaceSet::getClassTypeId (void ) \[static\] This static method returns the **SoType** object associated with objects of this class. ### SoType SoIndexedFaceSet::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. Reimplemented from **SoIndexedShape**. ### const SoFieldData \*\* SoIndexedFaceSet::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.*\ Returns the **SoFieldData** class which holds information about fields in this node. ### const SoFieldData \* SoIndexedFaceSet::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. Reimplemented from **SoIndexedShape**. ### void SoIndexedFaceSet::initClass (void ) \[static\] ### void SoIndexedFaceSet::GLRender (SoGLRenderAction \* action) \[virtual\] Action method for the **SoGLRenderAction**. This is called during rendering traversals. Nodes influencing the rendering state in any way or want to throw geometry primitives at OpenGL override this method. Reimplemented from **SoShape**. ### void SoIndexedFaceSet::getPrimitiveCount (SoGetPrimitiveCountAction \* action) \[virtual\] Action method for the **SoGetPrimitiveCountAction**. Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the *action*. Nodes influencing how geometry nodes calculate their primitive count also override this method to change the relevant state variables. Reimplemented from **SoShape**. ### SbBool SoIndexedFaceSet::generateDefaultNormals (SoState \* state, SoNormalBundle \* bundle) \[virtual\] *This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.*\ Subclasses should override this method to generate default normals using the **SoNormalBundle** class. TRUE should be returned if normals were generated, FALSE otherwise. Default method returns FALSE. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.\ Reimplemented from **SoVertexShape**. ### SbBool SoIndexedFaceSet::generateDefaultNormals (SoState \* state, SoNormalCache \* cache) \[virtual\] *This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.*\ Subclasses should override this method to generate default normals using the **SoNormalCache** class. This is more effective than using **SoNormalGenerator**. Return TRUE if normals were generated, FALSE otherwise. Default method just returns FALSE. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.\ Reimplemented from **SoVertexShape**. ### void SoIndexedFaceSet::generatePrimitives (SoAction \* action) \[protected\], \[virtual\] The method implements action behavior for shape nodes for **SoCallbackAction**. It is invoked from **SoShape::callback()**. (Subclasses should *not* override **SoNode::callback()**.) The subclass implementations uses the convenience methods **SoShape::beginShape()**, **SoShape::shapeVertex()**, and **SoShape::endShape()**, with **SoDetail** instances, to pass the primitives making up the shape back to the caller. Implements **SoShape**. ## Author Generated automatically by Doxygen for Coin from the source code.