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per scene view. The user can attach a NodeVisitor to do init for them, or leave it to the default which is to use the osgUtil::DisplayListVisitor which compiles all display lists and texture objects. The init traversal is called automatically by the first call to either app() or cull(), so should not be called by user code during initialization. This ensures that a valid graphics context has been established before OpenGL is initialized. osgUtil::DisplayListVisitor has also been updated to use a bit mask for options, and the addition of compilation of texture objects (via StateAttribute::compile) has also been added.
80 lines
2.1 KiB
Plaintext
80 lines
2.1 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSGUTIL_DISPLAYLISTVISITOR
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#define OSGUTIL_DISPLAYLISTVISITOR 1
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#include <osg/NodeVisitor>
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#include <osg/Geode>
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#include <osg/State>
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#include <osgUtil/Export>
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namespace osgUtil {
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/** Visitor for traversing scene graph and setting each osg::GeoSet's _useDisplayList flag,
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* with option to immediately compile osg::Drawable OpenGL Display lists and
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* osg::StateAttribute's.
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*/
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class OSGUTIL_EXPORT DisplayListVisitor : public osg::NodeVisitor
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{
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public:
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/** Operation modes of the.*/
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enum ModeValues
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{
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SWITCH_ON_DISPLAY_LISTS = 0x1,
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SWITCH_OFF_DISPLAY_LISTS = 0x2,
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COMPILE_DISPLAY_LISTS = 0x4,
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COMPILE_STATE_ATTRIBUTES = 0x8
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};
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typedef unsigned int Mode;
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/** Construct a CompileGeoSetsVisior to traverse all child,
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* with set specified display list mode. Default mode is to
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* gset->setUseDisplayList(true).
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*/
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DisplayListVisitor(Mode mode=COMPILE_DISPLAY_LISTS|COMPILE_STATE_ATTRIBUTES);
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/** Set the operational mode of how the visitor should set up osg::GeoSet's.*/
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void setMode(Mode mode) { _mode = mode; }
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/** Get the operational mode.*/
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Mode getMode() const { return _mode; }
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/** Set the State to use during traversal. */
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void setState(osg::State* state)
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{
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_state = state;
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}
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osg::State* getState()
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{
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return _state.get();
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}
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/** Simply traverse using standard NodeVisitor traverse method.*/
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virtual void apply(osg::Node& node);
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/** For each Geode visited set the display list usage according to the
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* _displayListMode.
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*/
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virtual void apply(osg::Geode& node);
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protected:
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Mode _mode;
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osg::ref_ptr<osg::State> _state;
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};
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};
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#endif
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