the type writing more explictly tied to the size type, with use of unsigned int as the default size. This approach
ensures that we get the same results under 32 and 64bit builds.
OSGDB_EXPORT macro to RegisterCompressorProxy, and modified the
findCompressor() method to look for custom compressors in libraries
such like osgdb_compressor_name.so, which was described in the wiki
page chapter 2.4."
modified files, while GroupSoLOD.h and .cpp was deleted. Please, delete
it from repository, it is not used any longer and I doubt if it is
probably not used for anything meaningful for a while. In the new code,
there is no GroupSoLOD. Please, delete it.
I am using new plugin version for about 1.5 month so I consider it
stable by myself.
List of changes:
- rewritten Inventor state stack
- shaders support
- light attenuation support
- support for reading from stream (readNode(std::istream& fin, options))
- improved grouping node handling (SoSeparator, SoGroup,...)
- fixed transformation bug when two SoShapes/Drawables with different transformations are placed bellow one grouping node
- introduced preprocessing to handle more advanced usage schemes of SoLOD and SoSwitch nodes
- unused code clean up
- improved notify messages
- animation callbacks fixes
- FindInventor.cmake improved finding routines, support for Coin3 and Coin4"
1. Rewrite the reading/writing exception handlers to work like the ive
plugin exceptions.
2. Write a header writing/checking function in ReaderWriterOSG2.cpp,
which may help decide if the stream is ascii or binary. The
readInputIterator() function will return null pointer if the input
file is nither osgb nor osgt format, which indicates that the old .osg
format could be used here, in case we've merged the two plugins
together.
3. Add a new ForceReadingImage option in the InputStream, which will
allocate an empty image object with the filename if specifed external
image file is missed. It may be useful for format converting in some
cases.
4. Add new osgParticle wrappers, as well as some modification to the
osgParticle headers, for instance, change isEnabled() to getEnabled().
5. Some fixes to the osg serialization wrappers."
Bone now inherit from MatrixTransform. It simplify a lot the update of
Bone matrix. It helps to have the bone system more generic. eg it's now
possible to have animation data with precomputed bind matrix. The other
benefit, is now the collada plugin will be able to use osgAnimation to
display skinned mesh. Michael Plating did a great work to improve this
aspect, he is working on the collada plugin and should be able to submit
a new version soon.
The RigGeometry has been refactored so now it works when you save and
reload RigGeometry because the source is not touched anymore. The
benefit with this update is that it should be now possible to use a
MorphGeometry as source for a RigGeometry.
The bad news is that the format has changed, so i have rebuild osg-data
related to osgAnimation data, updated the blender exporter to export to
the new format.
The fbx plugin could be touched about this commit, i dont compile it so
i can't give more information about it.
The bvh plugin has been updated by Wang rui so this one is fixed with
the new code of osgAnimation.
The examples has been updated to work with the new code too...
The example osg-data/example.osg should be remove, it's an old example
that does not work.
For people using blender the blender exporter up to date is here:
http://hg.plopbyte.net/osgexport2/
it will be merge to http://hg.plopbyte.net/osgexport/ as soon as the
modification will be push in the trunk.
"
> quote from http://www.opengl.org/registry/specs/ARB/wgl_pbuffer.txt
> The following attributes are supported by wglCreatePbufferARB:
>
> WGL_PBUFFER_LARGEST_ARB If this attribute is set to a
> non-zero value, the largest
> available pbuffer is allocated
> when the allocation of the pbuffer
> would otherwise fail due to
> insufficient resources. The width
> or height of the allocated pbuffer
> never exceeds <iWidth> and <iHeight>,
> respectively. Use wglQueryPbufferARB
> to retrieve the dimensions of the
> allocated pbuffer.
It notifies the user when the size is not as requested, but I could find no way for the program to detect this. I've added two lines to write the new size back into the _traits, I think this is appropriate, but I am not absolutely sure.
In PixelBufferX11 was no support, so I've added GLX_LARGEST_PBUFFER(_SGIX) support, with the same writeback to the _trais.
I have tested the GLX_LARGEST_PBUFFER version on linux and the WGL_PBUFFER_LARGEST_ARB with windows, all tested with the modified autocapture I just submitted.
"autocapture --pbuffer --window 100 100 18192 18192 cow.osg.\[0,0,-22.7\].trans"
gives me a 4096x4096 image on my windows machine,
and a 8192x8192 image on linux."
I found very useful to have a control whether osgView::setCameraManipulator does or does not reset camera to home position.
I extended method signature as follows:
void setCameraManipulator(osgGA::MatrixManipulator* manipulator, bool resetPosition = true);
keeping the current usage intact (default parameter), while enabling user to disable the position reset. That can be useful in the situation when manipulator position was already loaded, for example from a file (user specification), or defined any other way, while we do not want to be reset to home position. Other usability is usage of two manipulators in a modeling program (orbiting around the model, walking on the model) and changing between them while we want to preserve the position of a camera in the change. Games may benefit from it as well when we change from user-defined helicopter manipulator to soldier manipulator because the user escaped the helicopter. The camera will change manipulator but the position is expected to be kept in the transition (provided that user makes the state transition between the two manipulators himself).
"
From Robert Osfield, I didn't merge the change of parameter type of IntersectKdTree::intersect() as the internal maths is all done in Vec3s. Keeping Vec3 here hasn't effected the test results.
OpenSceneGraph/src/osgUtil/SceneView.cpp
introduced in svn
10915 (5 Jan 2010): "Added support for call root Camera CullCallbacks"
It causes a segfault in osgViewer based apps on our linux system (OSG_STEREO=ON OSG_STEREO_MODE=QUAD_BUFFER)
Problem does not show when OSG_STEREO=OFF.
< 976 else _cullVisitor->traverse(*_camera);
> 976 else cullVisitor->traverse(*_camera);
Looks like a typo, and removing the _ does fix the problem."
destruction of RequestQueue to remove any pointers held in DatabaseRequest attached to the scene graph, and to
prevent their subsequent use in cases where the scene graph is attached to a new DatabasePager.
to the osgDB::Registry. Added a osgDB::Registry::getObjectWrapperManager() for access of this object wrapper manager. This
change centralises the singleton management in osgDB.
Merged the osgDB::GlobalLookUpTable functionality into ObjectWrapperManger to keep down the number of singletons in use.
From Robert Osfield, refactor of Wang Rui's original osg2 into 3 parts - parts placed into osgDB, the ReaderWriter placed into src/osg/Plugin/osg and wrappers into src/osgWrappers/serializers/osg
1. The node type will be set to ATOM on read of <tag prop="..." ... /> type tags.
2. GROUP and NODE are now written using the same code (and not just duplicated code). Also NODE will not be written as an ATOM if it has no children or contents, so you need to set the type to ATOM if you want the <tag ... /> style.
3. You had put the write of "/>" for ATOM after the "return true", so it had no effect... Moved to before the return.
4. ATOM did not write its properties correctly, fixed.
5. As an added bonus, I made the write() method indent the output so it's more readable. It brings a small public interface change but the indent argument has a default value so client code doesn't need to change (if there even is any).
6. Another added bonus, I've simplified the write() method a bit by factoring out the write for children and properties into protected methods."
1) Add getShadowComparison() accessor function to osg::Texture class
2) Modify ReaderWriterTiff::writeTifStream() and _readColor() (in Image.cpp) to handle pixelFormat==GL_DEPTH_COMPONENT as if it were GL_LUMINANCE
3) Modify the Texture classes of the ive and osg plug-ins so that they save/load the following Texture members: _use_shadow_comparison, _shadow_compare_func and _shadow_texture_mode
"
- Fixed creation of useless intermediate nodes
WriterNodeVisitor.cpp fixes:
- Fixed naming of textures (path and extension)
"
Note from Robert Osfield, this submission also came with changes to use of ref_ptr<> and removal of delete[]'s, but these were not merged as they didn't actually fix any memory leaks, and in once instance introduced one.
glActiveTexture on every State::apply after more than one texunits have been
used.
This is against 2.9.6 (I think SVN head is the same)
Quick Synopsis:
New functions:
State::applyModeOnTexUnit
State::applyAttributeOnTexUnit
State::applyModeMapOnTexUnit
State::applyAttributeMapOnTexUnit
State::applyModeListOnTexUnit
State::applyAttributeListOnTexUnit
All copies of the normal versions, but they also set the active tex unit if
absolutely necessary (i.e. only if they call something OpenGL).
State::apply (*2)
State::applyTextureAttribute
Changed to call the above functions and no longer call setActiveTextureUnit
themselves.
State::setActiveTextureUnit
Made inline, so the benefit of having applyModeOnTexUnit (etc) inline
is retained.
"
To enable the automatic attachment of the required update callback to call osg::Image::update(..) subclasses from osg::Image will
need to implement the osg::Image::requestUpdateCall() and return true, and implement the osg::Image::update(NodeVisitor*) method to recieve the update call during the update traversal.
In particular, the case when the "instance_geometry" element has no "bind_material" sub-element. This is valid, according to the official collada 1.4.1 specification."
Add check in RigTransformSoftware if bones are null
Indent TimelineAnimationManager
Add check for NaN in UpdateCallback.cpp
Fix TimelineAnimationManager clear target (a refactore of Timeline is require for futur)
Fix Computation of bounding box for RigGeometry
There is a small bug with your change and SubloadCallback, the texture object is destroy at each call of Texture2D::apply because the modified count is never updated when using SubloadCallback.
I have made a small fix to avoid that, see attachement."
From Robert Osfield, added an if (_image.valid()) before the getModified() that Fabien added to avoid problems when no _image is assigned but an subload callback is.
> loader to un-premultiply the alpha (now in the codebase).
Applying the code brightens the semi-transparent portion, but the black edges are still there (same on both osgviewer and FlightGear).
Therefore I believe that the alpha channel is completely ignored (on png, gif, tiff, etc...). I tweaked and tweaked and finally got a workaround.
Please commit the enclosed file to fix these issues.
My workaround is a bit tricky (and some lines are even weird for me), but it resolves the black edges.
These workarounds also work on GIF, TIFF, TGA, and PSD as long as I've tested so far.
Please read this for more info on this issue:
http://macflightgear.sourceforge.net/home/development-notes/devnote-dec-02-2009http://macflightgear.sourceforge.net/home/development-notes/devnote-dec-03-2009
I'm very happy if some of you guys find a better means of solving the black edges.
"
"Here is our freshly baked 3DS reader/writer (named 'v0.5' to differentiate from previous one). Changes are against trunk rev. 10819.
Short changelog (from rev 10819):
- Added 3DS writer
- Sync'd with latest lib3DS
- Added options, especially "flattenMatrixTransforms" to get the "old" behaviour (else the reader correctly maps to OSG the transforms from the 3DS file).
What should be done:
- Check with pivot points, with and without "flattenMatrixTransforms" option.
- We ran tests on it, but we can never be 100% sure there is no bug. Testing from the community would of course be helpful."
(de)allocation going on in OverlayNode::cut().
So instead creating inner-loop variables 'distances' and 'newVertices'
every time, I moved the creation out of the loop and just do a clear() +
reserve() inside the loop. This allows std::vector<> to reuse the old
memory instead allocating new when the new size <= oldsize."
fixed a small bug then:
ReaderWriterPDF.cpp, line 133, change:
std::string uri = std::string("file:") + foundFile;
to:
#if defined(WIN32) && !defined(__CYGWIN__)
std::string uri = std::string("file:///") + foundFile;
#else
std::string uri = std::string("file:") + foundFile;
#endif
That's because glib accepts "file:///C:\\data\\file.pdf" as URIs on
Windows, as well as "file:/home/data/file.pdf" on Unix, but
"file:C:\\data\\file.pdf" is not recognized.
Now I could read my Chinese translation of OSGQSG with osgpdf. :P"
I have added the missing call to FreeLibrary in osgDB::FileUtils., and now my the runtime unload of MY dll is working properly. It has also cured some related problems I was having with memory leak checks being reported.
I have attached a fix to osgDB/FileUtils.cpp based on version 2.9.5 svn revision 10374
"
and so, if the .dot plugin was loaded, it would happily handle any file
name extension.
To reproduce the bug, first save a scene to a dot file (to load the dot
plugin), then try to write the scene to an osg file. If you look at the
osg file, you will see that it is a dot file."
The texture in data/Images should be copied to osg-data. I created the texture myself with the help of an explosion generator, so no license issues there.
"
"I've attached a small fix to osgUtil::SceneView so that is uses a scissor test when clearing the stencil buffer for stencil based stereo."
and
"I've added another small change for stencil based stereo, so please use this newer version. This newer version simplifies the calls to glOrtho and glRecti when drawing the stipple pattern. This change also happens to fix an issue where the stencil stereo would not work with certain viewport settings. I'm not exactly sure why this was happening, it might be a graphics driver issue, but either way I think the changes should be fine."
http://www.mail-archive.com/osg-users@lists.openscenegraph.org/msg33967.html
, interpolating through HSV space gives a rainbow color effect which
does not mimic the simple RGB color interpolation that OpenGL does.
It's overkill and causes unexpected visual artifacts. In the attached
files I've removed the conversion to HSV so that interpolation happens
in RGB space."
.dds texture files from internally-embedded textures during IVE writes."
From Robert Osfield, fixed a bug in the above submission, and changed the way that the filename of the file is passed into DataOutputStream to avoid issues with the .ive's plugins ability to read from istreams.
osg::GraphicsContext, in order to give good integration with the
application's GUI toolkit. This works really well.
However, I need to share OpenGL texture resources with the standard
osgViewer GraphicsContext implementations, in particular the
PixelBuffers. This is essential for my application to conserve graphics
memory on low-end hardware. Currently the standard osg implementations
will not share resources with another derived osg::GraphicsContext,
other than the pre-defined osgViewer classes e.g. PixelBufferX11 is
hardcoded to only share resources with GraphicsWindowX11 and
PixelBufferX11 objects, and no other osg::GraphicsContext object.
To address this in the cleanest way I could think of, I have moved the
OpenGL handle variables for each platform into a small utility class,
e.g. GraphicsHandleX11 for unix. Then GraphicsWindowX11, PixelBufferX11
and any other derived osg::GraphicsContext class can inherit from
GraphicsHandleX11 to share OpenGL resources.
I have updated the X11, Win32 and Carbon implementations to use this.
The changes are minor. I haven't touched the Cocoa implmentation as
I'm not familiar with it at all and couldn't test it - it will work
unchanged.
Without this I had some horrible hacks in my application, this greatly
simplifies things for me. It also simplifies the osgViewer
implementations slightly. Perhaps it may help with other users'
desires to share resources with external graphics contexts, as was
discussed on the user list recently."
Notes from Robert Osfield, adapted Colin's submission to work with the new EGL related changes.
filenames starting with a dash "-" character from the (std::vector<std::string>&) version
of osgDB::readNodeFiles. Handling of argument strings is properly implemented in the
osgDB::readNodeFiles(osg::ArgumentParser& arguments,const Options* options)
variant, which most code uses. The (std::vector<std::string>&) version is only called by
the osgconv utility, which does its own argument handling and stripping prior to calling
readNodeFiles().
Also, documented this behaviour in the header comments.
I believe this code removal is a meritful change because leavign the code in causes an
unexpected and undocumented behaviour (ignoring any filename starting with a dash) that
could bite users in the future. This behaviour is not needed for existing functionality
because existing code uses other APIs to handle dash-prefixed arguments anyway.
"
In Scene::updateSceneGraph(), change:
if (getSceneData())
{
updateVisitor.setImageRequestHandler(getImagePager());
getSceneData()->accept(updateVisitor);
}
if (getDatabasePager())
{
// synchronize changes required by the DatabasePager thread to the scene graph
getDatabasePager()->updateSceneGraph((*updateVisitor.getFrameStamp()));
}
to
if (getDatabasePager())
{
// synchronize changes required by the DatabasePager thread to the scene graph
getDatabasePager()->updateSceneGraph((*updateVisitor.getFrameStamp()));
}
if (getSceneData())
{
updateVisitor.setImageRequestHandler(getImagePager());
getSceneData()->accept(updateVisitor);
}
That is, just swap the positions of two 'if () {...}' segments.
While working on a paged terrain, I need to collect every newly allocated PagedLODs and make them temporarily unrenderable in the next frame, which are all done in a update callback. But I found that these PagedLODs will always be shown before collecting them, because of the unsuitable sequence in Scene::updateSceneGraph(). DatabasePager is synchronized AFTER the user updating traversal, that is, user cannot IMMEDIATELY find out changes made by DatabasePager.
"
functionality and I also modified osgmovie example to support "seek"."
Note from Robert Osfield, changes osgmovie to use '>' for the seek as '+' was already used in a separate submission that had been merged.
then reload a video and finally delete the second XineStreamImage.
In src/osgPlugins/xine/video_out_rgb.c, many code is ASM code, and 'clear()' function is one of them.
If OSG is compiled without the flag COMPILE_ASSEMBLY (default behaviours) the clear() function is an empty
function and allocated memory is never initialized to 0. So a structure which contain pointer haven't its pointer set to NULL.
And when we need to delete this pointer, all go bad.
I join the fixed file."
As Robert pointed out, i opted for modifying the resize code where the break is to minimize code changes, avoiding the duplicate resize of the viewport with the use of a vector and a search for duplicates. Not very elegant (avoiding an effect of a cause), another approach could be ripping out the method osg::Camera::setViewport(osg::Viewport*) which is more inline with Roberts rationale behind not to share viewports between cameras and left only its overloaded method setViewport(x,y,width,height). But this approach need some refactoring due to the intense use of the method. Notice also that the resize works well without this change if no sharing occurs, and the user of the method can opt for always call setViewport with a new instance.
"
Note from Robert Osfield, changed this submission to use an std::set<Viewport*> rather than an std::vector<> as it keeps the code a bit cleaner and more compact.
For example, when running FlightGear, I want the window to always have no title, so it opens full-screen without using the --full-screen option, which would prevent other windows from moving above the osg window.
I am attaching a patch I made to fix this problem."
being able to accurately provide the cool stuff that SVG is good for. :)
There is a one-line bug on line 68 in the
src/osgPlugins/svg/ReaderWriterSVG.cpp file where you can set the width
in the Options string, but not the height."
synchronization, improve capture device support.
here how to use it to display a capture device:
osg::Options* options = new osg::Options;
options->setPluginStringData("captureWantedWidth", "800");
options->setPluginStringData("captureWantedHeight", "600");
options->setPluginStringData("captureWantedFps", "30");
options->setPluginStringData("captureVideoDevice", "USB Video Device" );
options->setPluginStringData("captureSoundDevice", "");
then
osgDB::readImageFile("capture.directshow", options)
you can use a graphedit application to list devices available in
directshow.
for classic avi file you just need to do a
osgDB::readImageFile("file.avi.directshow");
You will need of course to install the codec needed by directshow to
read the avi files.
I recommand this tool http://avicodec.duby.info/, that check which
video/sound codec is needed to play an avi file.
You can test it with the osgmovie example.
"
only create 376, then the program would hang.
376 * 8MB stack per thread = 3008 MB
The stack size allocated per thread blew the process address stack.
To get more threads you have to specify a smaller per thread stack,
but while the Thread::start says it will limit the stack size to the
smallest allowable stack size, it won't let it be smaller than the
default. I included the limits.h header to use PTHREAD_STACK_MIN as
the minimum stack size.
As for the deadlock, if the pthread_create failed, the new thread
doesn't exist and doesn't call threadStartedBlock.release(), so the
existing thread deadlocks on threadStartedBlock.block(). Only block
if the thread was started."
similar remove-method.
The old code removed an element from a vector, which invalidates the
iterator of the loop This resulted in a crash on certain platforms. Now
the erasing is done the right way without invalidating the iterator."
The modification consists only in including osgGA::GUIEventAdapter::DOUBLECLICK in the list of "pointerEvent" events.
Test done to reproduce the problem and check the fix: in any osg application or example with an HandleInput function, break on events with a double-click event type. Without the changes, the event's buttonMask does not contain the double-clicked button. With the changes, it does.
Only simple tests (running some examples and playing with the mouse) were done to check that the changes do not break anything, since double-click is not used thoroughly in OSG.
Modification done against current SVN Trunk version (r10753).
As this is a fix, I do not wish to keep my copyright on this submission and assign it over to the project lead.
"
The patched loader also complains more loudly if a material library file wasn't found or if a referenced material wasn't found in the material library."
was able to follow the problem until following addition to Texture.cpp:
// GLES doesn't cope with internal formats of 1,2,3 and 4 so map them to
the appropriate equivilants.
if (_internalFormat==1) _internalFormat = GL_ALPHA;
if (_internalFormat==2) _internalFormat = GL_LUMINANCE_ALPHA;
if (_internalFormat==3) _internalFormat = GL_RGB;
if (_internalFormat==4) _internalFormat = GL_RGBA;
The problem is that internal format "1" corresponds to GL_LUMINANCE, not
GL_ALPHA. I double checked this from the Red Book. Fixed version is
attached to the email."
I've needed to run a recorded simulation offscreen and save it to a sequence of images, and the ScreenCaptureHandler seemed to be the simplest way to do that, and with this change it's possible.
Another change: I've also added the ability to specify continuous capture of all frames, or a certain number of frames. ScreenCaptureHandler now has a setFramesToCapture(int) method. The argument will be interpreted as:
0 : don't capture
<0 : capture continuously
>0 : capture that number of frames then stop
I also added startCapture() and stopCapture() methods so that user code can start capturing (either continuously or the given number of frames) at a given point in their program. setFramesToCapture() won't start capturing, you have to call startCapture() afterwards. The handler also now has another key to toggle continuous capture (defaults to 'C').
Note that continuous capture will of course only work if the CaptureOperation writes to different files (for example, a WriteToFile with SEQUENTIAL_NUMBER mode) or does something different each time... Otherwise it will just overwrite of course. :-)
I've also taken the chance to refactor the addCallbackToViewer() method a bit too, since finding the right camera is needed in two places now.
I've tested all cases (I think). If you want to try, in osgviewer.cpp and replace the line
// add the screen capture handler
viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);
with
// add the screen capture handler
osgViewer::ScreenCaptureHandler* captureHandler = new
osgViewer::ScreenCaptureHandler(
new osgViewer::ScreenCaptureHandler::WriteToFile(
"screenshot", "jpg",
osgViewer::ScreenCaptureHandler::WriteToFile::SEQUENTIAL_NUMBER),
-1);
viewer.addEventHandler(captureHandler);
captureHandler->startCapture();
And vary the "-1" (put 0, 10, 50) and then use the 'c' and 'C' keys and see how it reacts.
"
terrain. The triangulator is quite tricky to use properly but works
quite well, constraint triangulation is not an easy task... I have
encounter some crash during the development that the following patch
fix.
The two fixes are :
- Fix in removeVerticesInside() : needs to take into account UByte and
UShort version of DrawElements to avoid a crash later
- Fix a crash in triangulate() : detect degenerate adjacency case to
exit early form the adjacent triangle traversal loop to avoid a crash
later"
DisplaySettings now define COLOR and DEPTH as defaults for implicit buffers. Consequently Camera by default uses the same defaults through USE_DISPLAY_SETTINGS_MASK. However, particular Camera mask can be easily overriden through Camera::setImplicitBufferAttachmentMask method. I hope, that in this way we can have global control over implicit buffer defaults, and we can still retain fine grained control at Camera level.
I have also replaced original unsigned ints used to store masks to signed ints because complier resolves enums as signed integer (I got a number of warnings with unsigned int)."
makes smoothing optional for verticies which do not have a normal
associated with them in the OBJ input file. The previous behavior was
to always smooth at all verticies which did not have surface normals.
In this new implementation smoothing is on by default to be compatible
with previous behavior. The user can now specify the "generateFacetNormals"
option to the reader to use facet normals for verticies where the OBJ
file does not specify a normal."
Note from Robert Osfield, changed "noSmoothing" naming used by Lee to "generateFacetNormals".
settimeofday), OSG animations will freeze your application because
osg::Timer uses gettimeofday internally on non-Win32 platforms. This
is wrong and should be replace with times(2) or clock_gettime(2).
The attached patch fixes the issue in a binary-compatible way by using
clock_gettime when it's available, and falling back to gettimeofday
when it's not."
Most notable the __hpux define stuff. The __hpux__ variant seems to be not
defined which resulted in a compile error at this time. Consequently I have
replaced all occurances of __hpux__ with __hpux. And huge surprise: now osg
plugins are found and loaded correctly ...
The next notable one is the MSVC_IDE fix which makes the nmake Makefiles cmake
generator target behave like the ide one. Showed up because I started to do
scripted builds with nmake instead of devenv...
The rest is the usual bunch of stuff that just happens during normal
coding ..."
Fixed to osg::Texture for GLES support.
Added automatic GLenum mode mappings in osg::PrimitiveSet to provide a fallback for non support glDrawArray/glDrawElement modes.
Added finer gained error checking during StateSet::compile().
Moved the handling of DisplaySettings into Traits constructor.
Added support for s/getGLContextVersion(), s/getGLContextFlags() and s/getGLContextProfileMask() to osg::DisplaySettings.
Added command line and env var support for setting the GLContextVersion, GLContextFlags and GLContextProfileMask to osg::DisplaySettings.
Removed EXT postfix of FrameBufferObject functions, and added support for checking non EXT versions frame buffer object GL functions.
Introduced usage of OSG_GL*_FEATURES to avoid some #if #else #endif code blocks.
Using a submissions from Paul Martz as a guide added perliminary GL3 support to a range of OSG classes
