man SoVRMLNormal (Fonctions bibliothèques) -

NAME

SoVRMLNormal -

SYNOPSIS



#include <Inventor/VRMLnodes/SoVRMLNormal.h>

Inherits SoNode.

Detailed Description

The SoVRMLNormal class is used to bind normals to geometry.

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:. 

  Normal {
    exposedField MFVec3f vector  []   # (-,)
  }
  .fi


This node defines a set of 3D surface normal vectors to be used in the vector field of some geometry nodes (e.g., SoVRMLIndexedFaceSet and SoVRMLElevationGrid). This node contains one multiple-valued field that contains the normal vectors. Normals shall be of unit length.

Public Member Functions

virtual SoType getTypeId (void) const

SoVRMLNormal (void)

virtual void doAction (SoAction *action)

virtual void GLRender (SoGLRenderAction *action)

virtual void callback (SoCallbackAction *action)

virtual void pick (SoPickAction *action)

virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

Static Public Member Functions

static SoType getClassTypeId (void)

static void initClass (void)

Public Attributes

SoMFVec3f vector

Protected Member Functions

virtual const SoFieldData * getFieldData (void) const

virtual ~SoVRMLNormal ()

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)

Constructor & Destructor Documentation

SoVRMLNormal::SoVRMLNormal (void)

Constructor.

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

Destructor.

Member Function Documentation

SoType SoVRMLNormal::getClassTypeId (void) [static]

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

Reimplemented from SoNode.

SoType SoVRMLNormal::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
    }
    else if (node->getTypeId().isOfType(SoGroup::getClassTypeId())) {
      SoGroup * group = (SoGroup *)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.

Implements SoBase.

const SoFieldData ** SoVRMLNormal::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.

Reimplemented from SoNode.

const SoFieldData * SoVRMLNormal::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 SoFieldContainer.

void SoVRMLNormal::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 SoNode.

void SoVRMLNormal::doAction (SoAction * action) [virtual]

This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

void SoVRMLNormal::GLRender (SoGLRenderAction * action) [virtual]

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method.

Reimplemented from SoNode.

void SoVRMLNormal::callback (SoCallbackAction * action) [virtual]

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

void SoVRMLNormal::pick (SoPickAction * action) [virtual]

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

void SoVRMLNormal::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 calculates their primitive count also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

Member Data Documentation

SoMFVec3f SoVRMLNormal::vector

The normal vectors. Empty by default.

Author

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