source: experimental/distortionNG/DistortionSet.h @ 433

#ifndef OSGVIEWER_DistortionSet
#define OSGVIEWER_DistortionSet 1

/* -*-c++-*- osgVisual - Copyright (C) 2009-2012 Torben Dannhauer
 *
 * This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under 
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
 * You have to aquire licenses for all used proprietary modules.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * OpenSceneGraph Public License for more details.
*/

#include <osg/Object>
#include <osg/Image>
#include <osg/Matrixd>
#include <osg/Camera>
#include <osg/Switch>
#include <osg/Shader>
#include <osg/Geometry>

namespace osgViewer {

class DistortionSet : public osg::Object
{
public:
        enum DistortionInternals {
                MESH = 0,
                HIGHLIGHTER = 1,
                HUD = 2
        };

        META_Object(osgViewer,DistortionSet);   // Required for serializer

        DistortionSet(const osgViewer::DistortionSet& ds, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY): // Required for serializer
                _distortionMeshRows(ds._distortionMeshRows),
                _distortionMeshColumns(ds._distortionMeshColumns),
                //osg::PrimitiveSet::Mode _MeshType
                _intensityMap(ds._intensityMap),
                _texUnitScene(ds._texUnitScene),
                _texUnitIntensityMap(ds._texUnitIntensityMap),
                _viewOffset(ds._viewOffset),
                _projectionOffset(ds._projectionOffset),
                _showIntesityMapMapOnly(ds._showIntesityMapMapOnly){}

        DistortionSet();
        virtual ~DistortionSet();

        // Working access
        bool isDirty(){return(_meshDirty || _matrixDirty);}
        void dirtyMesh(){_meshDirty = true;}
        void dirtyMatrix(){_matrixDirty = true;}
        void clearDirtyStatus() { _meshDirty = false; _matrixDirty = false;}
        
        void setDistortionMeshDimensions(int rows, int cols, bool enforceMeshRebuild=false);

        osg::Image* getIntensityMap()  { return _intensityMap; }        // Also for manipulating the intensity map
        bool& getShowIntensityMapOnlyAsRef()    { return _showIntesityMapMapOnly;}

        void setSceneCamera(osg::Camera* camera)        { _sceneCamera = camera;}
        osg::Camera* getSceneCamera()   { return _sceneCamera.get(); }

        void setDistortionCamera(osg::Camera* camera)   { _distortionCamera = camera;}
        osg::Camera* getDistortionCamera()      { return _distortionCamera.get(); }

        osg::Switch* getDistortionInternals()   { return _distortionInternals; }

        osg::Shader* getShaderIntensityMap()    { return shaderIntensityMap; }
        void setShaderIntensityMap(osg::Shader* shader) { shaderIntensityMap = shader; }
        osg::Shader* getShaderIntensityMapVis() { return shaderIntensityMapVis; }
        void setShaderIntensityMapVis(osg::Shader* shader)      { shaderIntensityMapVis = shader; }

        osg::Matrixd& getProjectionOffset() { return _projectionOffset; }



        // Serializer Access
        void setDistortionMeshRows(int distortionMeshRows)              { _distortionMeshRows = distortionMeshRows; }
        int getDistortionMeshRows() const       { return _distortionMeshRows; }

        void setDistortionMeshColumns(int distortionMeshColumns)                { _distortionMeshColumns = distortionMeshColumns; }
        int getDistortionMeshColumns() const    { return _distortionMeshColumns; }

        void setDistortionMesh(osg::Vec4Array* distortionMesh)  { _distortionMesh = distortionMesh; }
        const osg::Vec4Array* getDistortionMesh() const { return _distortionMesh; }

        void setMeshType(GLenum meshType) { _meshType = meshType; }
    inline GLenum getMeshType() const { return _meshType; }

        void setIntensityMap(osg::Image* intensityMap)          { _intensityMap = intensityMap; }
        const osg::Image* getIntensityMap() const       { return _intensityMap; }


        void setTexUnitScene(unsigned int texUnitScene)         { _texUnitScene = texUnitScene; }
        unsigned int getTexUnitScene() const    { return _texUnitScene; }

        void setTexUnitIntensityMap(unsigned int texUnitIntensityMap)   { _texUnitIntensityMap = texUnitIntensityMap; }
        unsigned int getTexUnitIntensityMap() const     { return _texUnitIntensityMap; }

        void setViewOffset(const osg::Matrixd& viewOffset)      { _viewOffset = viewOffset; }
        const osg::Matrixd& getViewOffset() const       { return _viewOffset; }

        void setProjectionOffset(const osg::Matrixd& projectionOffset)          { _projectionOffset = projectionOffset; }
        const osg::Matrixd& getProjectionOffset() const { return _projectionOffset; }

        void setShowIntensityMapOnly(bool show) {_showIntesityMapMapOnly = show;}
        bool getShowIntensityMapOnly() const    { return _showIntesityMapMapOnly;}


private:
        // Blendmap has no dirty flag because changes of the intensityMap is directly effective.
        bool _meshDirty;
        bool _matrixDirty;

        int _distortionMeshRows;
        int _distortionMeshColumns;
        osg::ref_ptr<osg::Vec4Array> _distortionMesh;   // x,y = vertex coordinates, z,t=textureCoordinates
        GLenum _meshType;
        
        osg::ref_ptr<osg::Image> _intensityMap;
        unsigned int _texUnitScene;
        unsigned int _texUnitIntensityMap;

        osg::Matrixd _viewOffset;
        osg::Matrixd _projectionOffset;

        // Interconnect-Pointer to allow access between distortion elements (osgViewer) and the distortion manipulator.
        // These variable are therefor not saved/restored by the serializer but populated on runtime.
        bool _showIntesityMapMapOnly;   // Intensity Blending is done by a frag shader. To control it on runtime, the uniform must be bound to a central variable.
        osg::observer_ptr<osg::Camera> _sceneCamera;    // us used to pass the scene camera to the manipulator to allow matrix changes of the camera
        osg::observer_ptr<osg::Camera> _distortionCamera;       // is used to pass the distortion cam from osgViewers setupDistortion() method to the manipulator.
        osg::ref_ptr<osg::Switch> _distortionInternals; // definition: child #0 = mesh, #1 = highlighter, #2 HUD

        osg::ref_ptr<osg::Shader> shaderIntensityMap;   // used in 99%, it provides active intensity map blending
        osg::ref_ptr<osg::Shader> shaderIntensityMapVis;        // only used during setup process, this shaders discards the fragment color and only displays the intensitymapcolor to visualize the blendmap
};

}


#endif