root/OpenSceneGraph/trunk/include/osgShadow/ShadowVolume @ 13041

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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 OSGSHADOW_SHADOWVOLUME
15#define OSGSHADOW_SHADOWVOLUME 1
16
17#include <osg/Camera>
18#include <osg/Light>
19#include <osg/Geode>
20
21#include <osgShadow/ShadowTechnique>
22#include <osgShadow/OccluderGeometry>
23
24namespace osgShadow {
25
26/** ShadowedTexture provides an implementation of shadow textures.*/
27class OSGSHADOW_EXPORT ShadowVolume : public ShadowTechnique
28{
29    public :
30        ShadowVolume();
31
32        ShadowVolume(const ShadowVolume& es, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
33
34        META_Object(osgShadow, ShadowVolume);
35
36
37        void setDrawMode(osgShadow::ShadowVolumeGeometry::DrawMode drawMode);
38        osgShadow::ShadowVolumeGeometry::DrawMode getDrawMode() const { return _drawMode; }
39
40        void setDynamicShadowVolumes(bool dynamicShadowVolumes);
41        bool getDynamicShadowVolumes() const { return _dynamicShadowVolumes; }
42
43        /** initialize the ShadowedScene and local cached data structures.*/
44        virtual void init();
45
46        /** run the update traversal of the ShadowedScene and update any loca chached data structures.*/
47        virtual void update(osg::NodeVisitor& nv);
48
49        /** run the cull traversal of the ShadowedScene and set up the rendering for this ShadowTechnique.*/
50        virtual void cull(osgUtil::CullVisitor& cv);
51
52        /** Clean scene graph from any shadow technique specific nodes, state and drawables.*/
53        virtual void cleanSceneGraph();
54
55
56    protected :
57
58        virtual ~ShadowVolume();
59
60        osgShadow::ShadowVolumeGeometry::DrawMode       _drawMode;
61        bool                                            _dynamicShadowVolumes;
62
63        osg::ref_ptr<osgShadow::OccluderGeometry> _occluder;
64
65        OpenThreads::Mutex                              _shadowVolumeMutex;
66        osg::ref_ptr<osgShadow::ShadowVolumeGeometry>   _shadowVolume;
67
68        osg::Vec4                   _lightpos;
69
70        osg::ref_ptr<osg::Light>    _ambientLight;
71        osg::ref_ptr<osg::Light>    _diffuseLight;
72
73        osg::ref_ptr<osg::StateSet> _ss1;
74        osg::ref_ptr<osg::StateSet> _mainShadowStateSet;
75        osg::ref_ptr<osg::StateSet> _shadowVolumeStateSet;
76        osg::ref_ptr<osg::StateSet> _shadowedSceneStateSet;
77
78
79};
80
81}
82
83#endif
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