class OSGUTIL_EXPORT osgUtil::DisplayListVisitor

Visitor for traversing scene graph and setting each osg::GeoSet's _useDisplayList flag, with option to immediately compile osg::GeoSet's OpenGL Display lists.

Inheritance:

Public Methods

DisplayListVisitor(DisplayListMode mode=SWITCH_ON_DISPLAY_LISTS)

Construct a CompileGeoSetsVisior to traverse all child, with set specfied display list mode.

void setDisplayListMode(DisplayListMode mode)

Set the operational mode of how the visitor should set up osg::GeoSet's

DisplayListMode getDisplayListMode() const

Get the operational mode

void setState(osg::State* state)

Set the State to use during traversal.

osg::State* getState()

virtual void apply(osg::Node& node)

Simply traverse using standard NodeVisitor traverse method

virtual void apply(osg::Geode& node)

For each Geode visited set the display list usage according to the _displayListMode

Public Members

enum DisplayListMode

Operation modes of the DisplayListVisitor

Protected Fields

DisplayListMode _displayListMode

osg::ref_ptr<osg::State> _localState

local state is created in constructor and used as the default state during traversal

osg::ref_ptr<osg::State> _externalState

external state is used to override the default state

osg::ref_ptr<osg::State> _activeState

active state is equal to _externalState when it is valid, otherwise defaults to _localState

Documentation

Visitor for traversing scene graph and setting each osg::GeoSet's _useDisplayList flag, with option to immediately compile osg::GeoSet's OpenGL Display lists. The mode of operation of the vistor is controlled by setting the DisplayListMode either on visitor constructor or via the setDisplayListMode() method. DisplayListMode options are: _displayListMode == SWITCH_ON_AND_COMPILE_DISPLAY_LISTS cals gset->compile() on all Geode childern. Note, the visitor must only be used within a valid OpenGL context as compile uses OpenGL calls. _displayListMode == SWITCH_ON_DISPLAY_LISTS sets the Geode's children with gset->setUseDisplayList(true), this method does not directly create display list, or uses OpenGL calls so if safe to use before a valid OpenGL context has been set up. On the next redraw of the scene, the gset's draw methods will be called which then will respond to their _useDisplayList being set by creating display lists automatically. _displayListMode == SWITCH_OFF_DISPLAY_LISTS sets the Geode's children with gset->setUseDisplayList(false), this method does not directly create display list, or uses OpenGL calls so if safe to use before a valid OpenGL context has been set up.

enum DisplayListMode

Operation modes of the DisplayListVisitor

SWITCH_ON_AND_COMPILE_DISPLAY_LISTS

COMPILE_ON_DISPLAY_LISTS

SWITCH_ON_DISPLAY_LISTS

SWITCH_OFF_DISPLAY_LISTS

DisplayListVisitor(DisplayListMode mode=SWITCH_ON_DISPLAY_LISTS)

Construct a CompileGeoSetsVisior to traverse all child, with set specfied display list mode. Default mode is to gset->setUseDisplayList(true).

void setDisplayListMode(DisplayListMode mode)

Set the operational mode of how the visitor should set up osg::GeoSet's

DisplayListMode getDisplayListMode() const

Get the operational mode

void setState(osg::State* state)

Set the State to use during traversal.

osg::State* getState()

virtual void apply(osg::Node& node)

Simply traverse using standard NodeVisitor traverse method

virtual void apply(osg::Geode& node)

For each Geode visited set the display list usage according to the _displayListMode

DisplayListMode _displayListMode

osg::ref_ptr<osg::State> _localState

local state is created in constructor and used as the default state during traversal

osg::ref_ptr<osg::State> _externalState

external state is used to override the default state

osg::ref_ptr<osg::State> _activeState

active state is equal to _externalState when it is valid, otherwise defaults to _localState

This class has no child classes.

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