77 lines
2.4 KiB
Plaintext
77 lines
2.4 KiB
Plaintext
#ifndef OSGUTIL_VISUALSREQUIREMENTSVISITOR
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#define OSGUTIL_VISUALSREQUIREMENTSVISITOR 1
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#include <osg/NodeVisitor>
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#include <osg/Geode>
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#include <osg/GeoSet>
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#include <osgUtil/Export>
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namespace osgUtil {
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/** A visitor for traversing a scene graph establishing the OpenGL visuals are required
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* to support rendering of that scene graph. The results can then be used by
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* applications to set up there windows with the corret visuals. Have a look at
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* src/osgGLUT/Viewer.cpp's Viewer::open() method for an example how to use it.
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*/
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class OSGUTIL_EXPORT VisualsRequirementsVisitor : public osg::NodeVisitor
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{
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public:
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/** Default to traversing all children, and reqiresDoubleBuffer,
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* requiresRGB and requiresDepthBuffer to true and with
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* alpha and stencil off.*/
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VisualsRequirementsVisitor();
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void setRequiresDoubleBuffer(const bool flag) { _requiresDoubleBuffer = flag; }
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const bool requiresDoubleBuffer() const { return _requiresDoubleBuffer; }
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void setRequiresRGB(const bool flag) { _requiresRBG = flag; }
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const bool requiresRGB() const { return _requiresRBG; }
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void setRequiresDepthBuffer(const bool flag) { _requiresDepthBuffer = flag; }
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const bool requiresDepthBuffer() const { return _requiresDepthBuffer; }
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void setMinumumNumAlphaBits(const unsigned int bits) { _minimumNumberAlphaBits = bits; }
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const unsigned int getMinumumNumAlphaBits() const { return _minimumNumberAlphaBits; }
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const bool requiresAlphaBuffer() const { return _minimumNumberAlphaBits!=0; }
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void setMinumumNumStencilBits(const unsigned int bits) { _minimumNumberStencilBits = bits; }
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const unsigned int getMinumumNumStencilBits() const { return _minimumNumberStencilBits; }
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const bool requiresStencilBuffer() const { return _minimumNumberStencilBits!=0; }
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virtual void applyStateSet(osg::StateSet& stateset);
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virtual void apply(osg::Node& node);
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virtual void apply(osg::Geode& geode);
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virtual void apply(osg::Impostor& impostor);
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protected:
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bool _requiresDoubleBuffer;
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bool _requiresRBG;
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bool _requiresDepthBuffer;
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unsigned int _minimumNumberAlphaBits;
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unsigned int _minimumNumberStencilBits;
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};
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};
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#endif
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