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SoAnnotation Class Reference
[Nodes]

The SoAnnotation node draws all its child geometry on top of other geometry. More...

#include <Inventor/nodes/SoAnnotation.h>

Inheritance diagram for SoAnnotation:

SoSeparator SoGroup SoNode SoFieldContainer SoBase List of all members.

Public Member Functions

 SoAnnotation (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void GLRenderBelowPath (SoGLRenderAction *action)
virtual void GLRenderInPath (SoGLRenderAction *action)
virtual void GLRenderOffPath (SoGLRenderAction *action)

Static Public Member Functions

void initClass (void)

Protected Member Functions

virtual ~SoAnnotation ()

Detailed Description

The SoAnnotation node draws all its child geometry on top of other geometry.

This group-type node uses delayed rendering in combination with Z-buffer disabling to let it's children transparently render their geometry on top of the other geometry in the scene.

Since the Z-buffer needs to be disabled, the childrens' geometry will not be rendered back-to-front sorted, but rather in the order they are present in the scenegraph.


Constructor & Destructor Documentation

SoAnnotation::SoAnnotation void   ) 
 

Constructor.

SoAnnotation::~SoAnnotation  )  [protected, virtual]
 

Destructor.


Member Function Documentation

void SoAnnotation::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 SoSeparator.

void SoAnnotation::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 SoSeparator.

void SoAnnotation::GLRenderBelowPath SoGLRenderAction action  )  [virtual]
 

SGI Open Inventor v2.1 obsoleted support for SoGLRenderAction::addMethod(). Instead, GLRender() might be called directly, and to optimize traversal, the SoSeparator node calls GLRenderBelowPath whenever the path code is BELOW_PATH or NO_PATH (path code is guaranteed not to change). To be compatible with SGI's Inventor (and thereby also TGS') we have chosen to follow their implementation in this respect.

SoSeparator::GLRenderBelowPath() do not traverse its children using SoChildList::traverse(), but calls GLRenderBelowPath() directly for all its children.

Reimplemented from SoSeparator.

void SoAnnotation::GLRenderInPath SoGLRenderAction action  )  [virtual]
 

Implements the SoAction::IN_PATH traversal method for the rendering action.

Reimplemented from SoSeparator.

void SoAnnotation::GLRenderOffPath SoGLRenderAction action  )  [virtual]
 

Implements the SoAction::OFF_PATH traversal method for the rendering action.

Reimplemented from SoSeparator.


The documentation for this class was generated from the following files:
Generated on Tue Jul 27 23:53:03 2004 for Coin by doxygen 1.3.7