OSG News (most significant items from ChangeLog) ================================================ 9th August 2001 - osg-0.8.42.tar.gz >>> New osgWX library for integration of OSG with wxWindows apps. This release sees a relatively minor number of enhancements over 0.8.41, the most significant being the new osgWX library and wxsgv demo written by Ben Discoe. Also from Brede Johansen in this release is the improvements in support for older .flt (Open Flight) files such versions 12 & 13. Previously only version 15.6 files had been tested and developed to. Last but by no means least, several bug fixes related to view frustum culling have been made. 25th July 2001 - osg-0.8.41.tar.gz >>> Support added for multi-pass and multi-stage rendering including Impostors. The key feature developed is a highly flexible framework for multi-pass and multi-stage rendering techniques. Unlike most scene graphs and games engines the OSG has as dynamic framework which automatically configures itself at runtime. Building ontop of the new framework's multi-stage rendering capabilities, support for Impostors (hirachical image caching) has been integrated into the core scene graph library making extremely easy to take advantage of this advanced rendering techinque - normally only seen in research papers. Check out osgimpostor demo to see how easy it is to add osg::Impostor nodes to your own models. Impostors are particularily effective are reducing scene complexity whilest minimizing the visual impact, making it ideal for scenes with large numbers of complex objects such as a city scene, or a dense forest. Taking advantage of the new framework's multi-pass rendering capabilities is osgreflect demo which illustrates how to achieve planar relfections using the stencil buffer and multi-pass rendering. The cool thing about both the osgreflect and osgimpostor demos is that there is no hardwiring to achieve the results, the scene graph stores all the information neccessary to specify the number and type of rendering passes, and the framework handles the rest behind the scenes. This also makes it very easy to add these advanced rendering techinques to your own applications as everything is cleanly encapsulated with osgUtil::SceneView. New loaders have been added to support .lwo (Light Wave), .obj (Alias Wavefront) and .dw (Design Workshop) 3D file formats making it even easier to compose your own worlds from models sourced from the web or your own. osg::Camera has been totally revamped and now supports asymetric and othographics projections in addition to the symetrical perspective projections. And finally, support for texture subloading has been added to osg::Texture and osg::Image. This allows textures to be updated dynamically, and has already been used for mpeg video playback! 19th May 2001 - osg-0.8.40.tar.gz >>> Project lead, Robert Osfield, makes full-time commitment to OSG. This is the first full release since project lead, Robert Osfield, made a move to pursue the OSG's development full-time. This commitment has been made to bring the API rapidly towards maturity, and to provide high quality support and consultancy services. Please contact robert@openscenegraph.com if you have any queries. This release marks a significant step forward in the maturity of the API, with several major changes to the library in the areas of state handling, database support, and portability. To improve the extensibility of the OSG's handling of OpenGL state, new classes have been introduced to replace the previous hardwired state handling classes. The new classes also allow improved state sorting and lazy state updating which boosts both cull traversal and particularly draw traversal performance. To improve the modularity, interopability and conceptual clarity the support classes for database loading have been moved from the core osg library into their own osgDB library. Support for the .osg ASCII native database format and the .rgb reader has moved into its own osgPlugins library to further the cleanliness of the core library. Support has be added for multiple OpenGL context's and hence multi-pipe systems such as sgi's Onyx2, allowing each context to have its own display list and texture objects. The culler and rendering support in osgUtil has also been improved, and significantly speeded up for complex models. Also just in, thanks to Randall Hopper for adding support for FreeBSD :-) 23rd March 2001 - osg-0.8.39.tar.gz >>> Port of OSG to MacOS underway The first steps towards support of MacOS have been taken by Bryan Woods, adding Metrowerks project files and adding support for MacOS into the core scene graph. Work still in progress so assistance welcome to complete the task. Other major developments have been the addition of two new base classes osg::StateAttribute and osg::Drawable which are designed to allow greater extensibility of OpenGL state management and primitives. 17th Feburary 2001 - osg-0.8.38.tar.gz >>> New 3DS loader added The OpenSceneGraph now supports the 3DS file format. This makes available a huge range of potential models. Check out http://www.3dcafe.com or http://www.3drocketfuel.com for some juice. 10th Feburary 2001 - osg_src-0.8-37.tar.gz >>> Texture compression now supported The OpenSceneGraph now provides support for ARB and S3TC texture compression. This allows more textures to be loaded onto graphics card memory, resulting in happier users and a better world in which to live. This release also sees the addition of a simple hang gliding flight sim demo. 25th January 2001 - osg_src-0.8-35.tar.gz >>> Anisotropic texturing now supported and loading of gzip compressed files Anisotropic texturing provides for the next step in quality texturing filtering above tri-linear and is especially effective when viewing texture surfaces at shallow angles. Also added in this release is on-the-fly support for loading gzipped (.osgtgz, .tgz) and zipped (.zip) database files. This features allows users to store whole databases (models and textures) in a single tar ball and unpack them automatically on running the osg. This is ideal for browsing the web. 22nd December 2000 - osg_src-0.8-33.tar.gz >>> Support added for OpenGL vertex arrays, and several key image loaders. Support for OpenGL vertex arrays has been added to improve performance, particularly accelerating PC based graphics. Also added is support gif, jpeg, pic, tga, tiff image formats via dynamic plugins. 8th Decemeber 2000 - osg_src-0.8-32.tar.gz >>> New high resolution, low latency timer class - osg::Timer. Real-time graphics relies upon accurate timers for updating physics simulations and managing constant framerates. The OSG now provides osg::Timer which, when supported, takes advantage of hardware timers. 18th November 2000 - osg_src-0.8-29.tar.gz >>> Support for detail drawing with osg::PolygonOffset. Rendering of polygons which overlay underlying geometry, such as white lines on a runway, can now be achieved utilizing the new osg::PolygonOffset which encapsulates glPolygonOffset to avoid z fighting which otherwise hampers such detailing. 10th November 2000 - osg_src-0.8-28.tar.gz >>> New Open Flight .flt loader! Thanks to Brede Johansen submission of .flt loader, the OSG can now read Open Flight .flt databases. 3rd November 2000 - osg_src-0.8-26.tar.gz >>> Driving and Flight modes have been added to viewers. osgUtil::DriveManipulator and osgUtil::FlightManipulator have been added to allow the scene graph viewer (sgv) and other viewers to support a drive and flying modes. These modes can be accessed in sgv by pressing '2' and '3' respectively ('1' returns to trackball manipulator). Left mouse button accelerates forward, middle stops motion and right deccelerates.