Deferred rendering is now the de-facto standard rendering technique in many modern game engines, hence I think it is important to have this technique demonstrated in an osg code example.
This particular sample adds soft shadows as well as bump mapping into the rendering pipeline. The image files whitemetal_diffuse.jpg and whitemetal_normal.jpg from OpenSceneGraph-Data images folder are required (The OSG_FILE_PATH environment variable must be set correctly)
Two additional osgt models are included with the demo (best to also put them into OpenSceneGraph-Data, I think.
The shaders are currently defined in separate .frag and .vert files.
Drawables,StateSet, and osgDB::Registry.
Added cleanup_frame() from to osgProducer::OsgCamerGroup to help with proper
clean of OpenGL objects before exit, and modified osgviewer, osghangglider,
osgwindows examples to do the extra frame call to cleanup_frame() before exit.
Note, this required adding a unsigned int context ID to the osg::isGLUExtensionSupported(,)
and osg::isGLExtensionSupported(,) functions. This may require reimplementation
of end user code to accomodate the new calling convention.
/** compute, from normalized mouse coords, for sepecified Camera, the pixel coords relative to that Camera's RenderSurface.*/
bool computePixelCoords(float x,float y,unsigned int cameraNum,float& pixel_x,float& pixel_y);
/** compute, from normalized mouse coords, for sepecified Camera, the near and far points in worlds coords.*/
bool computeNearFar(float x,float y,unsigned int cameraNum,osg::Vec3& near, osg::Vec3& far);
/** compute, from normalized mouse coords, for sepecified Camera, intersections with the scene.*/
bool computeIntersections(float x,float y,unsigned int cameraNum,osgUtil::IntersectVisitor::HitList& hits);
/** compute, from normalized mouse coords, for all Cameras, intersections with the scene.*/
bool computeIntersections(float x,float y,osgUtil::IntersectVisitor::HitList& hits);
