126 lines
4.9 KiB
C++
126 lines
4.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
|
|
*
|
|
* This library is 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef OSGSIM_OVERLAYNODE
|
|
#define OSGSIM_OVERLAYNODE 1
|
|
|
|
#include <osg/buffered_value>
|
|
#include <osg/CameraNode>
|
|
#include <osg/Texture2D>
|
|
#include <osg/TexGenNode>
|
|
|
|
#include <osgSim/Export>
|
|
|
|
namespace osgSim {
|
|
|
|
/** OverlayNode is for creating texture overlays on scenes, with the overlay texture being generated
|
|
* by pre rendering an Overlay Subgraph to a texture, then projecting this resulting texture on the scene.*/
|
|
class OSGSIM_EXPORT OverlayNode : public osg::Group
|
|
{
|
|
public :
|
|
OverlayNode();
|
|
|
|
OverlayNode(const OverlayNode& es, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
|
|
|
|
META_Node(osgSim, OverlayNode);
|
|
|
|
virtual void traverse(osg::NodeVisitor& nv);
|
|
|
|
/** Set the overlay subgraph which will be rendered to texture.*/
|
|
void setOverlaySubgraph(osg::Node* node);
|
|
|
|
/** Get the overlay subgraph which will be rendered to texture.*/
|
|
osg::Node* getOverlaySubgraph() { return _overlaySubgraph.get(); }
|
|
|
|
/** Get the const overlay subgraph which will be render to texture.*/
|
|
const osg::Node* getOverlaySubgraph() const { return _overlaySubgraph.get(); }
|
|
|
|
|
|
/** Inform the OverlayNode that the overlay texture needs to be updated.*/
|
|
void dirtyOverlayTexture();
|
|
|
|
/** Set whether the OverlayNode should update the overlay texture on every frame.*/
|
|
void setContinuousUpdate(bool update) { _continuousUpdate = update; }
|
|
|
|
/** Get whether the OverlayNode should update the overlay texture on every frame.*/
|
|
bool getContinuousUpdate() const { return _continuousUpdate; }
|
|
|
|
|
|
/** Set the clear color to use when rendering the overlay subgraph.*/
|
|
void setOverlayClearColor(const osg::Vec4& color);
|
|
|
|
/** Get the clear color to use when rendering the overlay subgraph.*/
|
|
const osg::Vec4& getOverlayClearColor() const;
|
|
|
|
/** Set the TexEnv mode used to combine the overlay texture with the base color/texture of the OverlayNode's decorate subgraph.*/
|
|
void setTexEnvMode(GLenum mode);
|
|
|
|
/** Get the TexEnv mode used to combine the overlay texture with the base color/texture of the OverlayNode's decorate subgraph.*/
|
|
GLenum getTexEnvMode() const { return _texEnvMode; }
|
|
|
|
/** Set the texture unit that the texture should be assigned to.*/
|
|
void setOverlayTextureUnit(unsigned int unit);
|
|
|
|
/** Get the texture unit that the texture should be assigned to.*/
|
|
unsigned int getOverlayTextureUnit() const { return _textureUnit; }
|
|
|
|
/** Set the texture size hint. The size hint is used to request a texture of specified size.*/
|
|
void setOverlayTextureSizeHint(unsigned int size);
|
|
|
|
/** Get the texture size hint.*/
|
|
unsigned int getOverlayTextureSizeHint() const { return _textureSizeHint; }
|
|
|
|
|
|
/** Get the camera used to implement the render to texture of the overlay subgraph.*/
|
|
osg::CameraNode* getCamera() { return _camera.get(); }
|
|
|
|
/** Get the const camera used to implement the render to texture of the overlay subgraph.*/
|
|
const osg::CameraNode* getCamera() const { return _camera.get(); }
|
|
|
|
protected :
|
|
|
|
virtual ~OverlayNode() {}
|
|
|
|
void init();
|
|
|
|
void updateMainSubgraphStateSet();
|
|
|
|
typedef osg::buffered_value< int > TextureObjectValidList;
|
|
|
|
mutable TextureObjectValidList _textureObjectValidList;
|
|
|
|
osg::ref_ptr<osg::CameraNode> _camera;
|
|
|
|
// overlay subgraph is render to a texture
|
|
osg::ref_ptr<osg::Node> _overlaySubgraph;
|
|
|
|
// texgen node to generate the tex coordinates for us
|
|
osg::ref_ptr<osg::TexGenNode> _texgenNode;
|
|
|
|
// state set to decoate the main subgraph.
|
|
osg::ref_ptr<osg::StateSet> _mainSubgraphStateSet;
|
|
|
|
// texture to render to, and to read from.
|
|
GLenum _texEnvMode;
|
|
unsigned int _textureUnit;
|
|
unsigned int _textureSizeHint;
|
|
osg::ref_ptr<osg::Texture2D> _texture;
|
|
|
|
bool _continuousUpdate;
|
|
osg::Polytope _textureFrustum;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|