root/OpenSceneGraph/trunk/include/osgTerrain/GeometryTechnique @ 11031

Revision 11031, 3.8 kB (checked in by robert, 4 years ago)

Changed GeometryTechnique::private to protected, updated wrappers

Line 
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 OSGTERRAIN_GEOMETRYTECHNIQUE
15#define OSGTERRAIN_GEOMETRYTECHNIQUE 1
16
17#include <osg/MatrixTransform>
18#include <osg/Geode>
19#include <osg/Geometry>
20
21#include <osgTerrain/TerrainTechnique>
22#include <osgTerrain/Locator>
23
24namespace osgTerrain {
25
26class OSGTERRAIN_EXPORT GeometryTechnique : public TerrainTechnique
27{
28    public:
29
30        GeometryTechnique();
31
32        /** Copy constructor using CopyOp to manage deep vs shallow copy.*/
33        GeometryTechnique(const GeometryTechnique&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
34       
35        META_Object(osgTerrain, GeometryTechnique);
36       
37        virtual void init();
38       
39        virtual Locator* computeMasterLocator();
40       
41        virtual osg::Vec3d computeCenterModel(Locator* masterLocator);
42       
43        virtual void generateGeometry(Locator* masterLocator, const osg::Vec3d& centerModel);
44       
45        virtual void applyColorLayers();
46       
47        virtual void applyTransparency();
48       
49        virtual void smoothGeometry();
50
51        virtual void update(osgUtil::UpdateVisitor* nv);
52
53        virtual void cull(osgUtil::CullVisitor* nv);
54
55        /** Traverse the terain subgraph.*/
56        virtual void traverse(osg::NodeVisitor& nv);
57
58        virtual void cleanSceneGraph();
59
60        void setFilterBias(float filterBias);
61        float getFilterBias() const { return _filterBias; }
62       
63        void setFilterWidth(float filterWidth);
64        float getFilterWidth() const { return _filterWidth; }
65
66        void setFilterMatrix(const osg::Matrix3& matrix);
67        osg::Matrix3& getFilterMatrix() { return _filterMatrix; }
68        const osg::Matrix3& getFilterMatrix() const { return _filterMatrix; }
69       
70        enum FilterType
71        {
72            GAUSSIAN,
73            SMOOTH,
74            SHARPEN
75        };
76       
77        void setFilterMatrixAs(FilterType filterType);
78
79        /** If State is non-zero, this function releases any associated OpenGL objects for
80        * the specified graphics context. Otherwise, releases OpenGL objects
81        * for all graphics contexts. */
82        virtual void releaseGLObjects(osg::State* = 0) const;
83
84
85    protected:
86
87        virtual ~GeometryTechnique();
88
89        struct BufferData
90        {
91            osg::ref_ptr<osg::MatrixTransform>  _transform;
92            osg::ref_ptr<osg::Geode>            _geode;
93            osg::ref_ptr<osg::Geometry>         _geometry;
94        };
95       
96        unsigned int                        _currentReadOnlyBuffer;
97        unsigned int                        _currentWriteBuffer;
98       
99        BufferData                          _bufferData[2];
100       
101        void swapBuffers();
102
103        inline BufferData& getReadOnlyBuffer() { return _bufferData[_currentReadOnlyBuffer]; }
104        inline BufferData& getWriteBuffer() { return _bufferData[_currentWriteBuffer]; }
105       
106               
107        float                               _filterBias;
108        osg::ref_ptr<osg::Uniform>          _filterBiasUniform;
109        float                               _filterWidth;
110        osg::ref_ptr<osg::Uniform>          _filterWidthUniform;
111        osg::Matrix3                        _filterMatrix;
112        osg::ref_ptr<osg::Uniform>          _filterMatrixUniform;
113};
114
115}
116
117#endif
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