class OSGUTIL_EXPORT osgUtil::DisplayListVisitor

class OSGUTIL_EXPORT osgUtil::DisplayListVisitor: public osg::NodeVisitor

Visitor for traversing scene set each osg::GeoSet's _useDisplayList flag, or immediately compiling osg::GeoSet's OpenGL Display lists.

Inheritance:

Public Classes
enum DisplayListMode: Operation modes of the DisplayListVisitor

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
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

Protected Fields
DisplayListMode _displayListMode

Documentation

Visitor for traversing scene set each osg::GeoSet's _useDisplayList flag, or immediately compiling 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.