3cba9a52ef
Added default computeBound() implementation to osg::Drawable which uses a PrimtiveFunctor to compute the bounding box in a generic way, that will work for all Drawable subclasses that implement the accept(PrimitiveFunctor&).
399 lines
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399 lines
19 KiB
Plaintext
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OSG News (most significant items from ChangeLog)
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================================================
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July 2002 - OpenSceneGraph-0.9.0.tar.gz
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>>> OpenSceneGraph goes beta - Multitexturing, Occlusion Culling, Particles and much more added!
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This release marks the beginning of the beta phase of the OpenSceneGraph
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development, which means that all the major core features are now
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in the scene graph, and 1.0 is not far away. Its performance, features
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and portability already compares very favorably to other scene graphs,
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both comerical and open source.
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Multi-texturing support added to osg::StateSet, osg::Geometry, osg::State
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and txp loader.
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New osg::Geometry classes which supersedes the old Performer style osg::GeoSet,
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support multi-texturing, and uses sharable osg::Arrays which use
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std::vector<> for data storage and manipulation.
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Shadow volume occlusion culling adding to the core OSG, developed as a
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collobaration between Mike Connell and Robert Osfield. Our implementation
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uses convex planer occluders, with support for holes to allow larger
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and more effective occluders to be used. The approach is software
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based so it 100% portable, and by culling during the cull traversal
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both CPU and GPU loads are significantly reduced, making it an extremely
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powerful feature for large scale urban and indoor visulisation.
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osgParticle developed by Marco Jez adds support for a range of particle
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effects.
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osgGA (Gui Abstraction) library written by Neil Salter adds classes for
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adapting different GUI toolkits to work with a standard set of manipulators for
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modifying the scene, such as camera and state manipulators.
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Support has been added to the plugin architecture to facilitate the
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development of NodeKits - add on libraries which can used directly
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in your code, or loaded indirectly when loading from file. The
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later allows you to load a .osg file with text or particle effects
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in them,the plugin architecture automatically loads the required
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library which supports these features.
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A range of new demos have been as code examples, and to demonstrate
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the range of features that OpenSceneGraph delivers:
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osgoccluder - demonstrates ocllusion culling, and has a mode
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which allows the users to interactively create
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their own convex planer occluders.
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osghud - how to mix head up display with 3d views.
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osgparticle - shows the new osgParticle node kit in action.
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osgprerender - pre renders and scene then textures the result onto
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an animated flag.
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osgcallback - examples of the full range of callbacks that you
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can use to add dynamic behaviors to your scene graph.
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osglight - a simple example of how to set up spot and position
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lights in the scene.
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osgclip - illustrates how to add clip planes to you scene.
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osggeometry - examples of the different ways to set up primitives
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and vertex/color/normal and texture attributes in
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the new osg::Geometry class.
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osgmultitexture - a simple example which adds a spherical reflection
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map to a whole scene using the second texture unit
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if one exists.
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osg::Drawable::PrimtiveFunctor has also been added to allow querrying
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of primitive data with Drawables subclasses without requiring knowledge
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of the types of Drawable subclasses that exists. This decoupling makes
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it a very powerful and flexible utility.
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26th April 2002 - OpenSceneGraph-0.8.45.tar.gz
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>>> Support added for Solaris, texture cube mapping & muliple projections.
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The OpenSceneGraph now has a new Makefile system which supports all Unix
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compilation including the new addition to the family - Solaris!
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OpenSceneGraph welcomes Solaris to the list of supported platforms. This
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release puts all of the OpenSceneGraph functionality at the fingertips of
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Sun Microsystem's customers and developers. Solaris users can now have
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the benefit of a high performance scene graph for visual simulation,
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virtual reality, scientific visualization, CAD, and architectural
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walk-throughs. Many thanks to Sun for providing resources for the port.
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Additional html documentation has been added to the distribution to
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make it easier to get an understanding of scene graph technology and
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the project itself and how to make use of it.
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Support has also been added for OpenGL's texture cube mapping which
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is ideal for accurate environmental reflections and much more.
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The scene graph has been extended to allow multiple projection (via
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the new osg::Projection node) and viewports within one scene graphs,
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this makes it much easier to set up head up displays, and we have
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an example to demonstrate how easy it is - osghud.
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The osgUtil::CullVisitor and osgUtil::SceneView has been revamped
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removing the dependency on osg::Camera, which is now simply an
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option for SceneView rather than a requirement. This allows users
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to set the camera entirely with the scene graph or create their own
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camera classes and use them with SceneView. The existing osg::Camera
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has also been simplified as support for setting projection and
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modelview matrices have been moved out to the cull traversal.
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Several sets of node callbacks have been added, including a Cull
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NodeCallback on each Node, ComputeTransformCallback on Transform
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Nodes, EvaluateLODCallback on LOD nodes, ComputeBillboardCallback
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on Billboard nodes. These make it my easier to customize the
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scene graphs behavior at runtime.
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osg::Image::readPixels() and support for writing .bmp files has been
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added which has made it easy to add screen capture the any OpenSceneGraph
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application. This feature is demonstrated in the scene graph viewer
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which comes with the distribution - just press 'O' to output a screenshot.
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Finally, include/osg/MemoryManager has been added which overrides new
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and delete for debug builds. The override new and delete track allocations
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and deallocations, ensure they are matched, checked for memory under and
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overruns, and outputs a memleaks.log file on the results of executing
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your applications. This help track down a number of memory leaks and
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unmatched new and deletes within the OpenSceneGraph and should make
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it easier to do with users applications as well.
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All in all, the OpenSceneGraph is now more portable, easier to
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customize, cleaner and more robust. Beta release and 1.0 is now not
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far away!
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24th February 2002 - osg-0.8.44.tar.gz
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>>> Support added for Mac OSX, Cygwin and MinGW, and new TerraPage loader.
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The major item for this release is the completion of the Mac OSX port,
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thanks to Phil Atkin and others for making this happen.
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Also added to support for Cygwin and MinGW builds which gives Windows
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users a free and robust alternative to the Visual C++, which we
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have Norman Vine to thank.
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Funtionality wise there has been a great deal of work behind the scenes
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putting in place a flexible and extensible framework for handling
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transform nodes, users can now extend the osg::Transform node through
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subclassing or via callbacks. This work will underpin future work
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on moving camera setup into the scene graph, and environmental effects
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such as cloud layers, ground planes, stars and earth sky implementations
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which are planned for the next release.
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Callbacks and virtual methods have also been added to the osg::LOD &
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osg::Billboard to allow users to customize their behavior. Draw
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callbacks have also been added to allow customization of osg::Drawables
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at runtime.
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The Open Flight .flt loader has undergone a number of improvements
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including support for instancing and billboards.
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New TerraPage (.txp) loader and OpenDX writer (.dx) plugins have been added.
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Support for the clone operation on osg::Object's has been expanded
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to allow cloneType() - a simple clone an blank object of the same type,
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and clone(CopyOp&) where CopyOp is a functor which allows users to
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specify the deep copy vs shallow copying of object data.
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2nd January 2002 - osg-0.8.43.tar.gz
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>>> Support for TrueType text, Stereo out of the box, and much more.
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Since the last release the OSG has moved to CVS based developments so
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many users will have seen gradual increments in functionality and changes
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to the API. Whereas a the leap from 0.8.42 to 0.8.43 is actually quite
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significant is likely to require code changes as several significant parts
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of the API have evolved to a more mature state.
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The most significant new functionality is the addition of the osgText
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library which provides support for true type font rendering, as textured,
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polygonal, pixmap, bitmap and 3D fonts.
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We now have new osg::Matrix implementation which cleans up its interface.
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Also all angular paramters are now based on radians rather than degrees
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as before (and as in Performer), this has been done to be more consistent
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with the basic trignometric functions and standard maths conventions.
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Scene graph optimization has been added which can boost performance
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on some database by as much as an order of magnititude, this is
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particularily noticable in .flt based databases. Display list performance
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has also been boosted on NVidia based machines thanks to changing the
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compilation and execution of display list into two seperate operations.
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App callbacks are now supported on all Nodes, and there now a proper
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app traversal which can be used to animate the scene.
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Stereo support has been added into the osgUtil::SceneView which allows
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quad buffered/anaglyphic stereo to enabled easily for almost all OSG
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applications without code modifications - simple set environmental
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variable or pass in appropriate arguments and your app will render in
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stereo!
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src/Demos/osgcluster has been added to demonstrate how easy it is
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to set up a graphics cluster across a standard networked PC's.
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There have been many minor code changes to fix bugs and address
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performance bottlenecks or to improve extensibility was, representing
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a significant step towards API maturity and a beta release which is
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now not far away.
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9th August 2001 - osg-0.8.42.tar.gz
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>>> New osgWX library for integration of OSG with wxWindows apps.
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This release sees a relatively minor number of enhancements over
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0.8.41, the most significant being the new osgWX library and wxsgv
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demo written by Ben Discoe.
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Also from Brede Johansen in this release is the improvements in support for older
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.flt (Open Flight) files such versions 12 & 13. Previously only version
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15.6 files had been tested and developed to.
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Last but by no means least, several bug fixes related to view frustum
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culling have been made.
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25th July 2001 - osg-0.8.41.tar.gz
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>>> Support added for multi-pass and multi-stage rendering including Impostors.
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The key feature developed is a highly flexible framework for multi-pass and
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multi-stage rendering techniques. Unlike most scene graphs and games
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engines the OSG has as dynamic framework which automatically configures
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itself at runtime.
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Building ontop of the new framework's multi-stage rendering capabilities,
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support for Impostors (hirachical image caching) has been integrated into
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the core scene graph library making extremely easy to take advantage of
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this advanced rendering techinque - normally only seen in research papers.
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Check out osgimpostor demo to see how easy it is to add osg::Impostor
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nodes to your own models. Impostors are particularily effective are
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reducing scene complexity whilest minimizing the visual impact, making it
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ideal for scenes with large numbers of complex objects such as a city
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scene, or a dense forest.
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Taking advantage of the new framework's multi-pass rendering capabilities
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is osgreflect demo which illustrates how to achieve planar relfections
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using the stencil buffer and multi-pass rendering.
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The cool thing about both the osgreflect and osgimpostor demos is that
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there is no hardwiring to achieve the results, the scene graph stores
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all the information neccessary to specify the number and type of rendering
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passes, and the framework handles the rest behind the scenes. This also
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makes it very easy to add these advanced rendering techinques to your
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own applications as everything is cleanly encapsulated with
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osgUtil::SceneView.
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New loaders have been added to support .lwo (Light Wave), .obj
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(Alias Wavefront) and .dw (Design Workshop) 3D file formats making it
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even easier to compose your own worlds from models sourced from the
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web or your own.
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osg::Camera has been totally revamped and now supports asymetric
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and othographics projections in addition to the symetrical perspective
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projections.
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And finally, support for texture subloading has been added to osg::Texture
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and osg::Image. This allows textures to be updated dynamically, and
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has already been used for mpeg video playback!
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19th May 2001 - osg-0.8.40.tar.gz
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>>> Project lead, Robert Osfield, makes full-time commitment to OSG.
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This is the first full release since project lead, Robert Osfield, made
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a move to pursue the OSG's development full-time. This commitment has
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been made to bring the API rapidly towards maturity, and to provide
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high quality support and consultancy services. Please contact
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robert@openscenegraph.com if you have any queries.
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This release marks a significant step forward in the maturity of the
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API, with several major changes to the library in the areas of state
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handling, database support, and portability.
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To improve the extensibility of the OSG's handling of OpenGL state,
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new classes have been introduced to replace the previous hardwired
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state handling classes. The new classes also allow improved state
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sorting and lazy state updating which boosts both cull traversal
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and particularly draw traversal performance.
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To improve the modularity, interopability and conceptual clarity the
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support classes for database loading have been moved from the core
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osg library into their own osgDB library. Support for the .osg
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ASCII native database format and the .rgb reader has moved into its own
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osgPlugins library to further the cleanliness of the core library.
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Support has be added for multiple OpenGL context's and hence multi-pipe
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systems such as sgi's Onyx2, allowing each context to have its own
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display list and texture objects.
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The culler and rendering support in osgUtil has also been improved, and
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significantly speeded up for complex models.
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Also just in, thanks to Randall Hopper for adding support for FreeBSD :-)
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23rd March 2001 - osg-0.8.39.tar.gz
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>>> Port of OSG to MacOS underway
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The first steps towards support of MacOS have been taken by Bryan Woods,
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adding Metrowerks project files and adding support for MacOS into the
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core scene graph. Work still in progress so assistance welcome to
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complete the task.
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Other major developments have been the addition of two new base classes
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osg::StateAttribute and osg::Drawable which are designed to allow greater
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extensibility of OpenGL state management and primitives.
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17th Feburary 2001 - osg-0.8.38.tar.gz
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>>> New 3DS loader added
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The OpenSceneGraph now supports the 3DS file format. This makes
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available a huge range of potential models. Check out
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http://www.3dcafe.com or http://www.3drocketfuel.com for some juice.
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10th Feburary 2001 - osg_src-0.8-37.tar.gz
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>>> Texture compression now supported
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The OpenSceneGraph now provides support for ARB and S3TC texture
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compression. This allows more textures to be loaded onto graphics
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card memory, resulting in happier users and a better world in which
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to live.
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This release also sees the addition of a simple hang gliding flight sim
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demo.
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25th January 2001 - osg_src-0.8-35.tar.gz
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>>> Anisotropic texturing now supported <i>and</i> loading of gzip compressed files
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Anisotropic texturing provides for the next step in quality texturing
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filtering above tri-linear and is especially effective when viewing
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texture surfaces at shallow angles.
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Also added in this release is on-the-fly support for loading gzipped
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(.osgtgz, .tgz) and zipped (.zip) database files. This features allows
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users to store whole databases (models and textures) in a single
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tar ball and unpack them automatically on running the osg. This
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is ideal for browsing the web.
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22nd December 2000 - osg_src-0.8-33.tar.gz
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>>> Support added for OpenGL vertex arrays, and several key image loaders.
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Support for OpenGL vertex arrays has been added to improve performance,
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particularly accelerating PC based graphics.
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Also added is support gif, jpeg, pic, tga, tiff image formats via
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dynamic plugins.
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8th Decemeber 2000 - osg_src-0.8-32.tar.gz
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>>> New high resolution, low latency timer class - osg::Timer.
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Real-time graphics relies upon accurate timers for updating physics
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simulations and managing constant framerates. The OSG now provides
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osg::Timer which, when supported, takes advantage of hardware timers.
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18th November 2000 - osg_src-0.8-29.tar.gz
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>>> Support for detail drawing with osg::PolygonOffset.
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Rendering of polygons which overlay underlying geometry, such
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as white lines on a runway, can now be achieved utilizing the
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new osg::PolygonOffset which encapsulates glPolygonOffset to
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avoid z fighting which otherwise hampers such detailing.
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10th November 2000 - osg_src-0.8-28.tar.gz
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>>> New Open Flight .flt loader!
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Thanks to Brede Johansen submission of .flt loader, the OSG can now
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read Open Flight .flt databases.
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3rd November 2000 - osg_src-0.8-26.tar.gz
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>>> Driving and Flight modes have been added to viewers.
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osgUtil::DriveManipulator and osgUtil::FlightManipulator have been
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added to allow the scene graph viewer (sgv) and other viewers to
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support a drive and flying modes. These modes can be accessed
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in sgv by pressing '2' and '3' respectively ('1' returns to
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trackball manipulator). Left mouse button accelerates forward,
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middle stops motion and right deccelerates.
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