SoCacheHint(3) The SoCacheHint class is a node containing hints about how to cache geometry.

SYNOPSIS


#include <Inventor/nodes/SoCacheHint.h>

Inherits SoNode.

Public Member Functions


virtual SoType getTypeId (void) const

SoCacheHint (void)

virtual void doAction (SoAction *action)

virtual void GLRender (SoGLRenderAction *action)

virtual void callback (SoCallbackAction *action)

virtual void getBoundingBox (SoGetBoundingBoxAction *action)

virtual void pick (SoPickAction *action)

Static Public Member Functions


static SoType getClassTypeId (void)

static void initClass (void)

Public Attributes


SoSFFloat memValue

SoSFFloat gfxValue

Protected Member Functions


virtual const SoFieldData * getFieldData (void) const

virtual ~SoCacheHint ()

Static Protected Member Functions


static const SoFieldData ** getFieldDataPtr (void)

Additional Inherited Members

Detailed Description

The SoCacheHint class is a node containing hints about how to cache geometry.

The SoCacheHint node is used to set up clues to the rendering subsystem about how Coin should cache vertex data.

Please note that this is an experimental class. The API might change a lot before/if it's included in any official Coin release.

FILE FORMAT/DEFAULTS: 

    CacheHint {
        memValue 0.5
        gfxValue 0.5
    }


 

Constructor & Destructor Documentation

SoCacheHint::SoCacheHint (void)

Constructor.

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

Destructor.

Member Function Documentation

SoType SoCacheHint::getClassTypeId (void) [static]

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

Reimplemented from SoNode.

SoType SoCacheHint::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.

Implements SoBase.

const SoFieldData ** SoCacheHint::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 * SoCacheHint::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 SoCacheHint::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 SoCacheHint::doAction (SoAction *action) [virtual]

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

Reimplemented from SoNode.

void SoCacheHint::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 SoCacheHint::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 SoCacheHint::getBoundingBox (SoGetBoundingBoxAction *action) [virtual]

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

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

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

Member Data Documentation

SoSFFloat SoCacheHint::memValue

Sets the value for main memory usage. Should be a number between 0 and 1. A higher value will use more memory for caching. Default value is 0.5

SoSFFloat SoCacheHint::gfxValue

Sets the value for gfx memory usage. Should be a number between 0 and 1. A higher value will use more memory for caching. Default value is 0.5

Author

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