SoVRMLPositionInterpolator(3) The SoVRMLPositionInterpolator class is used to interpolate 3D points.


#include <Inventor/VRMLnodes/SoVRMLPositionInterpolator.h>

Inherits SoVRMLInterpolator.

Public Member Functions

virtual SoType getTypeId (void) const

virtual const SoEngineOutputData * getOutputData (void) const

SoVRMLPositionInterpolator (void)

Static Public Member Functions

static SoType getClassTypeId (void)

static void * createInstance (void)

static void initClass (void)

Public Attributes

SoMFVec3f keyValue

SoEngineOutput value_changed

Protected Member Functions

virtual const SoFieldData * getFieldData (void) const

virtual ~SoVRMLPositionInterpolator ()

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)

static const SoEngineOutputData ** getOutputDataPtr (void)

Detailed Description

The SoVRMLPositionInterpolator class is used to interpolate 3D points.

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:

  PositionInterpolator {
    eventIn      SFFloat set_fraction        # (-,)
    exposedField MFFloat key           []    # (-,)
    exposedField MFVec3f keyValue      []    # (-,)
    eventOut     SFVec3f value_changed
The PositionInterpolator node linearly interpolates among a list of 3D vectors. The keyValue field shall contain exactly as many values as in the key field. 4.6.8, Interpolator nodes (, contains a more detailed discussion of interpolators. 

Constructor & Destructor Documentation

SoVRMLPositionInterpolator::SoVRMLPositionInterpolator (void)


SoVRMLPositionInterpolator::~SoVRMLPositionInterpolator () [protected], [virtual]


Member Function Documentation

SoType SoVRMLPositionInterpolator::getClassTypeId (void) [static]

This static method returns the SoType object associated with objects of this class.

Reimplemented from SoVRMLInterpolator.

SoType SoVRMLPositionInterpolator::getTypeId (void) const [virtual]

Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.

Usage example:

  void foo(SoNode * node)
    if (node->getTypeId() == SoFile::getClassTypeId()) {
      SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type

For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups.

Reimplemented from SoVRMLInterpolator.

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

Returns the SoFieldData class which holds information about inputs in this engine.

Reimplemented from SoVRMLInterpolator.

const SoFieldData * SoVRMLPositionInterpolator::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 SoVRMLInterpolator.

const SoEngineOutputData ** SoVRMLPositionInterpolator::getOutputDataPtr (void) [static], [protected]

Returns the SoEngineOutputData class which holds information about the outputs in this engine.

Reimplemented from SoVRMLInterpolator.

const SoEngineOutputData * SoVRMLPositionInterpolator::getOutputData (void) const [virtual]

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Reimplemented from SoVRMLInterpolator.

void SoVRMLPositionInterpolator::initClass (void) [static]

Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Reimplemented from SoVRMLInterpolator.

Member Data Documentation

SoMFVec3f SoVRMLPositionInterpolator::keyValue

The keyValue vector.

SoEngineOutput SoVRMLPositionInterpolator::value_changed

The eventOut which is sent every time the interpolator has calculated a new value.


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