root/OpenSceneGraph/trunk/include/osgShadow/LightSpacePerspectiveShadowMap @ 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 * ViewDependentShadow codes Copyright (C) 2008 Wojciech Lewandowski
14 * Thanks to to my company http://www.ai.com.pl for allowing me free this work.
15*/
16
17
18#ifndef OSGSHADOW_LIGHTSPACEPERSPECTIVESHADOWMAP
19#define OSGSHADOW_LIGHTSPACEPERSPECTIVESHADOWMAP 1
20
21#include <osgShadow/MinimalCullBoundsShadowMap>
22#include <osgShadow/MinimalDrawBoundsShadowMap>
23#include <osgShadow/ProjectionShadowMap>
24
25namespace osgShadow {
26
27// Class implements
28// "Light Space Perspective Shadow Maps" algorithm by
29// Michael Wimmer, Daniel Scherzer, Werner Purgathofer
30// http://www.cg.tuwien.ac.at/research/vr/lispsm/
31
32class LispSM;
33
34class OSGSHADOW_EXPORT LightSpacePerspectiveShadowMapAlgorithm
35{
36    public:
37        LightSpacePerspectiveShadowMapAlgorithm();
38        ~LightSpacePerspectiveShadowMapAlgorithm();
39
40        void operator() (
41            const osgShadow::ConvexPolyhedron* hullShadowedView,
42            const osg::Camera* cameraMain,
43            osg::Camera* cameraShadow ) const;
44
45    protected:
46        LispSM * lispsm;
47};
48
49// Optimized for draw traversal shadow bounds
50class OSGSHADOW_EXPORT LightSpacePerspectiveShadowMapDB: public ProjectionShadowMap< MinimalDrawBoundsShadowMap, LightSpacePerspectiveShadowMapAlgorithm >
51{
52    public:
53        /** Convenient typedef used in definition of ViewData struct and methods */
54        typedef ProjectionShadowMap< MinimalDrawBoundsShadowMap, LightSpacePerspectiveShadowMapAlgorithm > BaseClass;
55
56        /** Classic OSG constructor */
57        LightSpacePerspectiveShadowMapDB()
58        {
59        }
60
61        /** Classic OSG cloning constructor */
62        LightSpacePerspectiveShadowMapDB(
63            const LightSpacePerspectiveShadowMapDB& copy,
64            const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY) : BaseClass(copy,copyop)
65        {
66        }
67
68        /** Declaration of standard OSG object methods */
69        META_Object( osgShadow, LightSpacePerspectiveShadowMapDB );
70};
71
72// Optimized for cull traversal shadow bounds
73class OSGSHADOW_EXPORT LightSpacePerspectiveShadowMapCB: public ProjectionShadowMap< MinimalCullBoundsShadowMap, LightSpacePerspectiveShadowMapAlgorithm >
74{
75    public:
76        /** Convenient typedef used in definition of ViewData struct and methods */
77        typedef ProjectionShadowMap< MinimalCullBoundsShadowMap, LightSpacePerspectiveShadowMapAlgorithm > BaseClass;
78
79        /** Classic OSG constructor */
80        LightSpacePerspectiveShadowMapCB()
81        {
82        }
83
84        /** Classic OSG cloning constructor */
85        LightSpacePerspectiveShadowMapCB(
86            const LightSpacePerspectiveShadowMapCB& copy,
87            const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY) : BaseClass(copy,copyop)
88        {
89        }
90
91        /** Declaration of standard OSG object methods */
92        META_Object( osgShadow, LightSpacePerspectiveShadowMapCB );
93};
94
95// Optimized for view frustum bounds
96class OSGSHADOW_EXPORT LightSpacePerspectiveShadowMapVB: public ProjectionShadowMap< MinimalShadowMap, LightSpacePerspectiveShadowMapAlgorithm >
97{
98    public:
99        /** Convenient typedef used in definition of ViewData struct and methods */
100        typedef ProjectionShadowMap< MinimalShadowMap, LightSpacePerspectiveShadowMapAlgorithm > BaseClass;
101
102        /** Classic OSG constructor */
103        LightSpacePerspectiveShadowMapVB()
104        {
105        }
106
107        /** Classic OSG cloning constructor */
108        LightSpacePerspectiveShadowMapVB(
109            const LightSpacePerspectiveShadowMapVB& copy,
110            const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY) : BaseClass(copy,copyop)
111        {
112        }
113
114        /** Declaration of standard OSG object methods */
115        META_Object( osgShadow, LightSpacePerspectiveShadowMapVB );
116};
117
118typedef LightSpacePerspectiveShadowMapDB LightSpacePerspectiveShadowMap;
119
120} // namespace osgShadow
121
122#endif
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