SoNurbsProfile(3) Coin SoNurbsProfile(3) NAME SoNurbsProfile - The SoNurbsProfile class is a node for specifying smooth profile curves. SYNOPSIS #include Inherits SoProfile. 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 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 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 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) Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. Static Public Member Functions inherited from SoProfile 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 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 SoMFFloat knotVector 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 The SoNurbsProfile class is a node for specifying smooth profile curves. Use nodes of this type if you want to set up profiles that are smooth curves. Use ProfileCoordinate2 for nonrational profile curves where weight is 1.0 (default), and ProfileCoordinate3 for rational profile curves to specify the weight. Weight is analogous to having magnets pulling on the curve. A typical usage case for SoNurbsProfile is to specify NURBS trimming curves. For example: #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 ] } Note that the coordinates of the NurbsProfile live in the parametric space of the trimmed SoNurbsSurface, and that 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. 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. 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. 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. If you find the above confusing, you probably do not want to use NURBS without reading up on the general concepts first. 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 Historical Perspective' by David F. Rogers). A basic overview of curve and surface rendering using NURBS can also be found in chapter 8 of 'The Inventor Mentor'. FILE FORMAT/DEFAULTS: NurbsProfile { index 0 linkage START_FIRST knotVector 0 } Constructor & Destructor Documentation SoNurbsProfile::SoNurbsProfile (void) Constructor. SoNurbsProfile::~SoNurbsProfile () [protected], [virtual] Destructor. Member Function Documentation SoType SoNurbsProfile::getClassTypeId (void) [static] This static method returns the SoType object associated with objects of this class. 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. 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. 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. 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. Implements SoProfile. void SoNurbsProfile::getVertices (SoState * state, int32_t & numvertices, SbVec2f *& vertices) [virtual] Return vertex set of state. Implements SoProfile. Member Data Documentation SoMFFloat SoNurbsProfile::knotVector Knot values for the NURBS curve. Author Generated automatically by Doxygen for Coin from the source code. Version 4.0.2 Tue Dec 26 2023 17:59:22 SoNurbsProfile(3)