openscenegraph
DisplayRequirementsVisitor
Go to the documentation of this file.
1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version. The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSGUTIL_DISPLAYREQUIREMENTSVISITOR
15#define OSGUTIL_DISPLAYREQUIREMENTSVISITOR 1
16
17#include <osg/NodeVisitor>
18#include <osg/Geode>
19#include <osg/DisplaySettings>
20
21#include <osgUtil/Export>
22
23namespace osgUtil {
24
25/** A visitor for traversing a scene graph establishing which OpenGL visuals are
26 * required to support rendering of that scene graph. The results can then be used by
27 * applications to set up their windows with the correct visuals. Have a look at
28 * src/osgGLUT/Viewer.cpp's Viewer::open() method for an example of how to use it.
29 */
30class OSGUTIL_EXPORT DisplayRequirementsVisitor : public osg::NodeVisitor
31{
32 public:
33
34 /** Default to traversing all children, and requiresDoubleBuffer,
35 * requiresRGB and requiresDepthBuffer to true and with
36 * alpha and stencil off.*/
37 DisplayRequirementsVisitor();
38
39 META_NodeVisitor(osgUtil, DisplayRequirementsVisitor)
40
41 /** Set the DisplaySettings. */
42 inline void setDisplaySettings(osg::DisplaySettings* ds) { _ds = ds; }
43
44 /** Get the DisplaySettings */
45 inline const osg::DisplaySettings* getDisplaySettings() const { return _ds.get(); }
46
47 virtual void applyStateSet(osg::StateSet& stateset);
48
49 virtual void apply(osg::Node& node);
50
51 protected:
52
53 osg::ref_ptr<osg::DisplaySettings> _ds;
54
55};
56
57}
58
59#endif