GL_GENERATE_MIPMAP_SGIS is very slow (over half a second for a 720*576
texture). However, glGenerateMipmapEXT() performs well (16ms for the
same texture), so I have modified the attached files to use
Texture::generateMipmap() if glGenerateMipmapEXT is supported, instead
of enabling & disabling GL_GENERATE_MIPMAP_SGIS."
Notes, from Robert Osfield, I've tested the out of the previous path using
GL_GENERATE_MIPMAP_SGIS and non power of two textures on NVidia 7800GT and
Nvidia linux drivers with the image size 720x576 and only get compile times
of 56ms, so the above half second speed looks to be a driver bug. With
Muchael's changes the cost goes done to less than 5ms, so it's certainly
an effective change, even given that Michael's poor expereiences with
GL_GENERATE_MIP_SGIS do look to be a driver bug.
The first bug is that the terrain tiles will page out to a lower LOD when they are right in front of you. The issue appears to be with the blacklisting heuristic which forces a tile to LOD 1, commenting out the usage of blacklisting with the LOD Nodes fixes our problem. This code change was made to line 29 of TXPPageLOD.cpp.
The second bug we were experiencing is that the database reader options never make it through to the archive loader. The use case for us appeared when the FID codes for the terrain were no longer on the materials. As it turns out the archive was being created twice, once by TXPNode and once by the ReaderWriterTXP on getArchive() so the options never actually got set on the archive that was being loaded. The fix is to first create the archive by calling getArchive on the ReaderWriterTXP, which stores it in a map for reference later, and then passing that archive into the TXPNode for it to set its internal member. With this code change we only create one archive (not sure what creating two did) and our options flags get set properly on the database.
The changes made are in TXPNode.h line 72 where the TXPArchive is now passed in. In the TXPNode.cpp the loadArchive(TXPArchive*) was changed to have the default behavior if NULL is passed in, if an archive is passed in then it does not load it since all the loading is done in the ReaderWriterTXP::getArchive(). The only other place that loadArchive is called is in TXPIO.cpp where a modification was made to pass in NULL which will have the same behavior as it used to. The last change is the little block of code starting on line 57 of ReaderWriterTXP.cpp, this was changed so that it first calls getArchive() which caches the archives in a map does some loading stuff and returns a pointer to it which is then passed in as a parameter to TXPNode::loadArchive().
The performance changes were made to TXPParser.cpp line 163 where we use to osgUtil::Optimizer on the node before passing it off, and on line 1456 we changed the geometry to use display lists. These small changes actually made drastic performance increases for us, as much as 1000% on certain laptops.
As far as testing goes, we have tested these changes with at least 5 txp databases on a variety of different computers including Mac OS and Linux. The base version used is 2.4."
The reason is if you want to build an application that use a library that use openscenegraph you have to build the full chain in debug or in release.
On windows you have no choice, but on linux you can link with both version without rebuilding everything ...
The patch consist only to change the line on one line
SET(CMAKE_DEBUG_POSTFIX "d")
with
SET(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "add a postfix, usually d on windows")"
now holds the dirty flag and enables/disables event traversal in response dirty
being set/unset. This allows terrain to be automatically updated in response
to Terrain scale and sample ratio changes.
osg::ref_ptr<osg::Node> ReaderWriterVRML2::convertFromVRML(openvrml::node *obj)
The fixes are:
* Added the source's parent directory as search directory for image files.
* The material properties are now set in the stateset of the Geode rather than the Geometry. This will allow geometries to be reused with different material properties in future updates.
NB: I planned for a caching scheme in which multiple occurences of the same primitive (e.g., Cylinders with radius 0.8 and height 1.2), would use the same Geometry object. Unfortunately, my planning moved me to other areas, but I might still finish the caching scheme in a quiet hour. For the time being I decided it would be a good thing to already submit my current changes.
"
Cause: possibly a copy/paste typo in src/osgPlugins/osg/LineStipple.cc, line 61:
if (fr[0].matchWord("functionMask") && fr[1].getUInt(mask))
Solution: change to:
if (fr[0].matchWord("pattern") && fr[1].getUInt(mask))"
Finally it seems to not come from the empty geode. The origin of the problem seems to be the uniform initialization during the building of the program which call a glUseProgram.
If your scene never display the node that contains the shader and if there is no other shader on the scene, this "glUseProgram" is the only one that is called during your simulation. So, this shader is applied on all the scene.
I fix this bug by switching off the shader (by calling glUseProgram(0) ) during the compilation of a state which does not contain the shader.
"
Changes includes:
1. A new GifImageStream class (inherit from osg::ImageStream and OpenThreads::Thread) have already been added to implement different operations of a GIF movie, such like playing, pausing, rewinding, setting time and so on.
2. Some small changes to decode_row() and gif_read_stream(), which make the transparency of GIF images correctly.
3. Just a few changes to the ReaderWriterGIF::readGIFStream() function, which ensure that animate GIFs are loaded by GifImageStream (and the function returns GifImageStream objects) and static GIFs unchanged (still use the old method and returns osg::Image objects!).
Attachments are the cpp file and an animate GIF file for further test. Just rebuild the osgdb_gif project and use osgviewer or osgmovie to view it.
The plugin has been tested on Windows and Arch Linux."
"Here is a collection of changes which should fix issues building the OSG with CMake 2.6.0 (along with some other changes)
CMakeLists.txt:
* Set CMP0003 to supress warning about linking against -lpthread (which is a
non-absolute library location). (CMake 2.6.x fix)
* Modified the WIN32_USE_MP and a couple of other Visual Studio specific flags
to be in an IF(MSVC) block (minor tweak to reduce exposing this stuff on MinGW builds)
* Includes my second set of glu tesselator autodetection changes that you
seemed to want but haven't committed yet.
src/OpenThreads/pthreads/CMakeLists.txt:
* Eliminates warning when compiling on Linux about spaces in link line (CMake 2.6.x fix)
CMakeModules/OsgMacroUtils.cmake:
* Tweaks to make the macros behave properly under CMake 2.6.0 (doesn't change behavior under CMake 2.4.x)
CMakeModules/Find3rdPartyDependencies.cmake:
* Adds the NO_DEFAULT_PATH option to all of the search options so that things in C:\Program Files\OpenSceneGraph aren't accidently picked up during configure time and instead only things in the "3rdParty" folder are discovered. (general bugfix)
"
post 2:
"Ok, hold the presses. I just discovered that for some odd reason the osgdb_* plugins under Linux aren't getting put under the osgPlugins-2.5.0 folder. Not exactly sure why this broke, the folder was there, just empty. I'll have to look into it this evening."
post 3:
"Fixed, was caused by the switch to CMAKE_LIBRARY_OUTPUT_DIRECTORY and some code in osgPlugins/CMakeLists.txt that effectively overrides LIBRARY_OUTPUT_PATH on non-MSVC compilers to dump the plugins in the plugins folder. I tweaked it to override CMAKE_LIBRARY_OUTPUT_DIRECTORY as well. Seems to work fine."
osgconv cessna.osg cessna.dae
Examination of the resulting .dae file reveals several out-of-range tristrip indices; viewing the .dae file in osgviewer causes a crash when OSG tries to lookup those indices.
Attached resolves this issue."
- Solves issues of loading image data into the texture memory
- Print a warning if images are of different dimensions or have different internal formats (GL specification requires images to be the same)
Patch is tested and seems to work fine. It shouldn't break any other functionality. It should go into include/osg and src/osg
"
CLAMP ->GL_CLAMP_TO_EDGE
NONE->GL_CLAMP_TO_BORDER
The current 2.5.0 daePlugin assumes the following binding
CLAMP ->GL_CLAMP
NONE->GL_REPEAT
Notably the GL_CLAMP binding will result in visible black seams on input files that use otherwise matching textures. Replacing GL_CLAMP by GL_CLAMP_TO_EDGE solves this problem. I've updated both the read and write functions.
"
* I split the mouse handling from a monolithic method to separate ones, slightly cleaner than a whole bunch of if()'s, especially with another case of the mouse entering the canvas.
* I changed the EVT_KEY_DOWN handler to an EVT_CHAR handler, although that now makes the up and down handler assymetric. The new down-handler returns translated key codes, so when you press the S key (without anything else), it actually returns 's' and not 'S' as the EVT_KEY_DOWN did. This means that statistics can be called up in the viewer window, while the example previously only printed a "Stats output:" line to the console. I'm not truly happy that the up handler returns _untranslated_ key codes. But solving this completely would probably mean adding some table that translated from wxWidgets' untranslated key codes to OSG's internal ones. This might be interesting to add, as anyone using OSG + wxWidgets in any serious manner would also have to add this.
* I commented out the evt.Skip()'s in the keyboard handlers as these would only be necessary if there were some key events that are not handled. But currently all key events are simply forwarded.
* I changed the handling of a mouse drag to a more general mouse move"
multi-threaded paging, where the Pager manages threads of reading local
and http files via seperate threads. This makes it possible to smoothly
browse large databases where parts of the data are locally cached while
others are on a remote server. Previously with this type of dataset
the pager would stall all paging while http requests were being served,
even when parts of the models are still loadable virtue of being in the
local cache.
Also as part of the refactoring the DatabaseRequest are now stored in the
ProxyNode/PagedLOD nodes to facilitate quite updating in the cull traversal,
with the new code avoiding mutex locks and searches. Previous on big
databases the overhead involved in make database requests could accumulate
to a point where it'd cause the cull traversal to break frame. The overhead
now is negligable.
Finally OSG_FILE_CACHE support has been moved from the curl plugin into
the DatabasePager. Eventually this functionality will be moved out into
osgDB for more general usage.
