fd2ffeb310
Added beginnings of new osgViewer::Scene,View,Viewer,CompositeViewer and GraphicsWindowProxy files.
127 lines
4.9 KiB
C++
127 lines
4.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGSIM_OVERLAYNODE
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#define OSGSIM_OVERLAYNODE 1
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#include <osg/buffered_value>
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#include <osg/Camera>
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#include <osg/Texture2D>
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#include <osg/TexGenNode>
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#include <osgSim/Export>
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namespace osgSim {
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/** OverlayNode is for creating texture overlays on scenes, with the overlay texture being generated
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* by pre rendering an Overlay Subgraph to a texture, then projecting this resulting texture on the scene.*/
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class OSGSIM_EXPORT OverlayNode : public osg::Group
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{
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public :
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OverlayNode();
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OverlayNode(const OverlayNode& es, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Node(osgSim, OverlayNode);
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virtual void traverse(osg::NodeVisitor& nv);
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/** Set the overlay subgraph which will be rendered to texture.*/
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void setOverlaySubgraph(osg::Node* node);
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/** Get the overlay subgraph which will be rendered to texture.*/
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osg::Node* getOverlaySubgraph() { return _overlaySubgraph.get(); }
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/** Get the const overlay subgraph which will be render to texture.*/
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const osg::Node* getOverlaySubgraph() const { return _overlaySubgraph.get(); }
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/** Inform the OverlayNode that the overlay texture needs to be updated.*/
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void dirtyOverlayTexture();
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/** Set whether the OverlayNode should update the overlay texture on every frame.*/
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void setContinuousUpdate(bool update) { _continuousUpdate = update; }
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/** Get whether the OverlayNode should update the overlay texture on every frame.*/
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bool getContinuousUpdate() const { return _continuousUpdate; }
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/** Set the clear color to use when rendering the overlay subgraph.*/
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void setOverlayClearColor(const osg::Vec4& color);
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/** Get the clear color to use when rendering the overlay subgraph.*/
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const osg::Vec4& getOverlayClearColor() const;
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/** Set the TexEnv mode used to combine the overlay texture with the base color/texture of the OverlayNode's decorate subgraph.*/
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void setTexEnvMode(GLenum mode);
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/** Get the TexEnv mode used to combine the overlay texture with the base color/texture of the OverlayNode's decorate subgraph.*/
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GLenum getTexEnvMode() const { return _texEnvMode; }
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/** Set the texture unit that the texture should be assigned to.*/
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void setOverlayTextureUnit(unsigned int unit);
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/** Get the texture unit that the texture should be assigned to.*/
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unsigned int getOverlayTextureUnit() const { return _textureUnit; }
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/** Set the texture size hint. The size hint is used to request a texture of specified size.*/
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void setOverlayTextureSizeHint(unsigned int size);
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/** Get the texture size hint.*/
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unsigned int getOverlayTextureSizeHint() const { return _textureSizeHint; }
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/** Get the camera used to implement the render to texture of the overlay subgraph.*/
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osg::Camera* getCamera() { return _camera.get(); }
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/** Get the const camera used to implement the render to texture of the overlay subgraph.*/
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const osg::Camera* getCamera() const { return _camera.get(); }
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protected :
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virtual ~OverlayNode() {}
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void init();
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void updateMainSubgraphStateSet();
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typedef osg::buffered_value< int > TextureObjectValidList;
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mutable TextureObjectValidList _textureObjectValidList;
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osg::ref_ptr<osg::Camera> _camera;
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// overlay subgraph is render to a texture
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osg::ref_ptr<osg::Node> _overlaySubgraph;
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// texgen node to generate the tex coordinates for us
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osg::ref_ptr<osg::TexGenNode> _texgenNode;
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// state set to decoate the main subgraph.
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osg::ref_ptr<osg::StateSet> _mainSubgraphStateSet;
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// texture to render to, and to read from.
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GLenum _texEnvMode;
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unsigned int _textureUnit;
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unsigned int _textureSizeHint;
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osg::ref_ptr<osg::Texture2D> _texture;
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bool _continuousUpdate;
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bool _updateCamera;
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osg::Polytope _textureFrustum;
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};
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}
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#endif
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