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Robert Osfield 2004-08-06 09:36:13 +00:00
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NEWS.txt
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OSG News (most significant items from ChangeLog) OSG News (most significant items from ChangeLog)
================================================ ================================================
4th August 2003 - OpenSceneGraph-0.9.7 6th August 2003 - OpenSceneGraph-0.9.7
>>> new osgTerrain library for generating large scale geospatial databases. >>> support for and generation of large scale geospatial whole earth databases, support for movies, with examples shadows and volume rendering.
osgTerrain The 0.9.7 encompasses many improvements, bug fixes, new examples and significant new functionality, the most notable of which is
a new osgTerrain library for generation of large scale geospatial databases.
Improved TXP plugin The new osgTerrain library and associated osgdem utility program allow users to uses moziacs of geospatial imagery and digital elevation maps
to generate a complete paged database which can be used with standard OSG viewers, and users programs. By utilising GDAL to load the imagery
and DEM's a wide range of geospatial formats are supported.
DatabasePager The TerraPage plugin has also been rewritten ontop of the OSG's osg::PagedLOD and osgDB::DatabasePager which provides support for
tile fallback mechansim to ensure that no holes or cracks appear in the databases being roamed, and to achieve constant frameframe
via load balancing mechansisms with osgDB::DatabasePager.
Double Vec & Matrix classes & CoordinateSystemNode/EllipsoidModel The osgDB::DatabasePager has been further improved to provide more configurable load balancing to allow application developers to
achieve constrant framerates when using paged databases.
osgUtil - tristipper, simplifier, GLObjectVisitor. Double Vec & Matrix classes & CoordinateSystemNode/EllipsoidModel class have been introduced to better support browsing of large
scale databases, and to provide a mechansim for tracking the local up orientation when roaming whole earth databases.
osgUtil has been enhanced with a improved triangle stipper class (osgUtil::TriStipVisitor), a new simplifier (osgUtil::Simplifer) for
reducing triangle density of osg::Geometry leaves (utilised by osgTerrain to provide simplication of terrain tiles), improved and
more configurable optimizer (osgUtil::Optimizer), a new utility class for compling and releasing OpenGL objects (osgUtil::GLObjectVisitor)
replaces the prevsous and more limited DisplayListVisitor.
All the osgGA::MatrxManipulator's (used for camera manipulator etc) have been revamped with usage of doubles internally, and with
tracking of the current CoordinateSystem if one is active, to be better support whole earth databases. All the MatrixManipulator
have been extend to allow the setting of a user defined a home position. Two new manipulators have been introduced
osgGA::TerrainManipulator, for roaming whole earth/terrain databases, and osgGA::TrackerManipulator which allows the camera to be
attached to a node in the scene graph.
Movie support under Linux and OSX via libMpeg3 and Quicktime respectively, which extend the new osg::ImageStream base class which
allows application developers access to playing, pausing and rewinding movies.
The convertion utility osgconv has been extended to allow compression of textures and mipmap generation during conversion when
writing to the native .ive binary format. Texture compression and pre computer mipmaps enable faster loading of databases
and lower utilization of memory resources.
Examples Examples
osgdem osgdem
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osgvolume osgvolume
New manipulators - TerrainManipulator and TrackerManipulator. Write support added to JPG plugin.
Movie support under Linux and OSX via LibMpeg3 and Quicktime respectively. Write + 3D texture support added to DDS plugin.
Support for compressing textures and mipmap generation in osgconv. Pseudo loaders .trans, .rot and .scale have been added.
Updated LWO, AC3D, BMP, IVE and FLT loaers.
osg::TexGenNode has been added to provide a mechanism for positioning OpenGL's texture coordinate generation planes.
Bug fixes. Bug fixes.