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Updated NEWS for release.

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Robert Osfield
2003-07-26 21:01:43 +00:00
parent 703eec05b2
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NEWS.txt
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@@ -8,62 +8,98 @@ OSG News (most significant items from ChangeLog)
>>> loader and ARB_fragment_program and ARB_vertex_buffer_object extensions,
>>> improvements to the Terrex .txp and OpenFlight .flt loaders.
The most signicifant feature of the 0.9.5 release is the combination of native
constant frame rate database paging support, providived by the new osg::PageLOD and
osgDB::DatabasePager classes, and the new native .ive binary plugin which supports
The key new features of the 0.9.5 release are the new OpenGL2.0 nodekit, constant frame rate
database paging support, classes, and the new native .ive binary plugin which supports
both reading and writing of all core osg nodes, including inlining of compressed
and non compressed imagery.
The native database paging support achieves constant frame rate through threading
of the database reading, and time based incremental compile and delete of display
lists, vertex_buffer_objects and texture objects. A new TextureObjectManager class
also caches a list of expired texture objects for reuse, and allows new newly loading
imagery to reuse expired texture objects, with the imagery automatically subloaded
to the reused texture objects. This reuse happens transparently and benifits other
OSG usages such as the OSG's Terrapage loader.
The native database paging support,providived by the new osg::PageLOD and osgDB::DatabasePager,
achieves constant frame rate through threading of the database reading, and time based
incremental compile and delete of display lists, vertex_buffer_objects and texture objects.
A new TextureObjectManager class also caches a list of expired texture objects for reuse,
and allows new newly loading imagery to reuse expired texture objects, with the imagery
automatically subloaded to the reused texture objects. This reuse happens transparently
and benifits other OSG usages such as the OSG's Terrapage loader.
The new .ive binary plugin was developed by Uni-C's VR-Center, and kindly
submitted as open source, adds support for binary reading and writing OSG nodes
drawable and state (including compressed/mipmapped) textures. The .ive
format produces a much faster load time and smaller file size then .osg
To provide support multi-thread operation of the OSG, such as multi-thread database paging
and multi-threaded, multi-window graphics enabled by OpenProducer, the OpenSceneGraph and
OpenProducer have now adopted the OpenThreads threading library, osgDB and osgProducer now
depend upon it. OpenThreads is open source, light weight, cross platform C++ threading
which encapsulates the low level, platform specific threading API calls. Currently pthreads
under Unix and Win32 threads under Windows are supported, with Sgi Sprock threads to be
released very soon. The OpenThreads project website can be found at http://openthreads.sf.net.
The new .ive binary plugin was developed by Uni-C's VR-Center, and kindly submitted as
open source, adds support for binary reading and writing OSG nodes drawable and state
(including compressed/mipmapped) textures. The .ive format produces a much faster
load times and smaller file size then native ASCII .osg format. Load times for .ive
files are also 10-20x faster then equivilant OpenFlight .flt and load in an already
optimised scene graph form making it much more suitable for paging. Files can be
converted easily using the osgconv utility : osgconv myfile.flt myfile.ive
New osgGL2 library
The new osgGL2 nodekit library adds support for the OpenGL2.0 vertex ProgramObect and fragment
ShaderObject's recently ratified by the OpenGL ARB, . The osgGL2 uses the extension have local
prototypes which allow them to be compiled even in the absence of OpenGL headers that don't
support the GL2 extension, allowing to port to all platform, and at runtime the extensions are
querried for and used if available. At time of release only 3DLabs WildcatVP series supported
this extension at runtime, but other graphics cards and manufactures will be releasing GL2
extension very soon and will be automatically supported by osgGL2. The osgGL2 was developed
by Mike Weiblen at 3DLabs whomn have kindly submitted osgGL2 as open source and for inclusion
with the OSG distribution.
Adoption of OpenThreads for cross platform threading support.
The ARB_fragment_program, ARB_vertex_buffer_object and ARB_vertex_program attributes are
also now supported in core osg library. The new osg::FragmentProgram state attribute
encapsulates the ARB_fragment_program which is supported by the recent graphics cards
from NVidia, ATI and 3DLabs. Support for ARB_vertex_buffer_object and ARB_vertex_program
attributes have been added to the osg::Geometry class. The ARB_vertex_buffer_object extension
can boost peformance by as much as 50% when working on geometry bound data sets.
New osg::PagedLOD + osgDB::DatabasePager support for native,
constant framerate database paging.
Two new image loaders, dds and pnm, and a 3dc point cloud have been added. The .dds plugin
adds support for compressed & mipped mapped imagery, making it ideal for applications where
large texture sizes or database paging is required. The pnm image loader reads the
pnm, pgm and pbm image formats. See http://netghost.narod.ru/gff/vendspec/pbm/ for details.
New native IVE binary format.
The Terrapage .txp plugin been updated to include support for multi-texturing, layers and billboards
and includes improvements to multi-threaded pager, which has also been ported over to use OpenThreads.
The OpenFlight .flt plugin has also been improved and now support detail textures via multi-texturing.
Support for ARB_fragment_program
TessellationHints now supported by ShapeDrawable which allow the shape primitives to be rendered
are vary levels of detail.
Supported has been added for auto scaling and rotating text into osgText.
Five new examples have been included in the distribution:
Support for ARB_vertex_buffer_object
osgtexturerectangle illustrates how to use the osg::TextureRectangle which encapsulates
the NV_texture_rectangle extension.
osgprerendercubemap illustrates how to use pre rendering imagery to osg::TextureCubeMap
for tasks such as building a environmental texture maps.
slideshow3D is a presentation tool which use a scene graph to store a render set of slides, each
slide containing layers which can contain bullet points, paragraph, imagergy and 3d animated
models - and is effictively a 3D powerpoint. The presentations can be built seperately and stored in a .osg file or created by
slideshow3D via an xml file, two examples - introduction.xml and models.xml, which are included
in the OpenSceneGraph-Data-0.9.5 data distribution. slideshow3D depends upon libxml2 for parsing
the xml files.
osgpoints uses the osg::Point state attribute to attenuate and control point size and any points
loaded by the application. This is a useful way of visualizing point data clouds.
osgdemeter is example of how to integrate the Demeter, OSG using osgProducer::Viewer as a viewer
class. This example depends upon the demeter terrain engine, which can be download from
http://www.terrainengine.com.
Support for vertex attributes in osg::Geometry.
New 3dc points data cloud loader.
New dds image loader.
New pnm image loader.
TessellationHints now supported by ShapeDrawable.
Supported added for auto scaling and rotating text + performance improvements.
New examples - osgtexturerectangle, osgprerendercubemap, slideshow3D, osgpoints, osgdemeter.
Support added for Open Flight detail textures via multi-texturing.
Addition of camera style convince set and get methods to osgUtil::SceneView, consolidating
Camera style convince set and get methods to osgUtil::SceneView, consolidating
previous functionality that was provided by both osg::SceneView and osg::Camara into one place.
This move has made osg::Camera redundent so has it been removed to avoid confusion,
usage inconsistencies and bloat of core libraries.
Removal of the long time deprecated osg::GeoSet, osgconv still has a copy of GeoSet and the
.osg support for so is able to convert any remaining .osg database which contained GeoSet's.
The long time deprecated osg::GeoSet has been removed, to aid migration of old .osg datasets
osgconv has a copy of GeoSet and the .osg support for it so is able to convert any remaining
.osg database which contained GeoSet's.
28th April 2003 - OpenSceneGraph-0.9.4-2