root/OpenSceneGraph/trunk/include/osgShadow/ShadowTexture @ 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_SHADOWETEXTURE
15#define OSGSHADOW_SHADOWETEXTURE 1
16
17#include <osg/Camera>
18#include <osg/Material>
19
20#include <osgShadow/ShadowTechnique>
21
22namespace osgShadow {
23
24/** ShadowedTexture provides an implementation of shadow textures.*/
25class OSGSHADOW_EXPORT ShadowTexture : public ShadowTechnique
26{
27    public :
28        ShadowTexture();
29
30        ShadowTexture(const ShadowTexture& es, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
31
32        META_Object(osgShadow, ShadowTexture);
33
34        /** Set the texture unit that the shadow texture will be applied on.*/
35        void setTextureUnit(unsigned int unit);
36
37        /** Get the texture unit that the shadow texture will be applied on.*/
38        unsigned int getTextureUnit() const { return _textureUnit; }
39
40
41        /** initialize the ShadowedScene and local cached data structures.*/
42        virtual void init();
43
44        /** run the update traversal of the ShadowedScene and update any loca chached data structures.*/
45        virtual void update(osg::NodeVisitor& nv);
46
47        /** run the cull traversal of the ShadowedScene and set up the rendering for this ShadowTechnique.*/
48        virtual void cull(osgUtil::CullVisitor& cv);
49
50        /** Clean scene graph from any shadow technique specific nodes, state and drawables.*/
51        virtual void cleanSceneGraph();
52
53
54    protected :
55
56        virtual ~ShadowTexture() {}
57
58        osg::ref_ptr<osg::Camera>       _camera;
59        osg::ref_ptr<osg::TexGen>       _texgen;
60        osg::ref_ptr<osg::Texture2D>    _texture;
61        osg::ref_ptr<osg::StateSet>     _stateset;
62        osg::ref_ptr<osg::Material>     _material;
63        unsigned int                    _textureUnit;
64};
65
66}
67
68#endif
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