Re: [osg-users] osgEphemeris
Hi Mi, If you have a look at my previous email on this subject you'll find the answer to this problem. It's a bug in osgEphemeris. After re-calculating the skydome image ephemeris fails to set the dirty bit on the result, hence the texture is not updated. Filip On Wed, Sep 10, 2008 at 3:07 AM, [EMAIL PROTECTED] wrote: Hei, I've tried running the osgEphemeris example with OSG2.6 and I could not get it working properly, the stars were alright but the sun never appeared.but the same example works perfectly on osg2.4. So does anyone have any idea what could be the reason for this? regards, Mi Haotian On Tue, September 9, 2008 9:17 pm, Adrian Egli OpenSceneGraph (3D) wrote: Ok, i will be more precises. * nothings strange found with osg notify level set * i am working with latest svn osg * the texture gets calculated, but not displayed on the sky dome * if you wish i can upload the osgEmph. with all my changes. there are some bugs in the osgEmph. VC 7 project. i am working with vc 2005 / adrian ### C:\Users\adrianset OSG OSG_FILE_PATH=F:\dev\OpenSceneGraph\Data;.;F:\data\models; OSG_LIBRARY_PATH=.;F:\dev\OpenSceneGraph\Deployment\bin OSG_WINDOW=256 256 512 512 # F:\dev\OpenSceneGraph\osgEphemeris\binset OSG_NOTIFY_LEVEL=DEBUG F:\dev\OpenSceneGraph\osgEphemeris\binEphemerisViewer.exe park.ive GraphicsContext::setWindowingSystemInterface() 010A1C40 101A0F9C CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() itr='.' FindFileInPath() : trying F:\dev\OpenSceneGraph\osgEphemeris\bin\osgPlugins-2.7.2\osgdb_ive.dll ... itr='F:\dev\OpenSceneGraph\Deployment\bin' FindFileInPath() : trying F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_ive.dll ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_ive.dll Opened DynamicLibrary osgPlugins-2.7.2/osgdb_ive.dll itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\park.ive ... itr='.' FindFileInPath() : trying F:\dev\OpenSceneGraph\osgEphemeris\bin\park.ive ... itr='F:\data\models' FindFileInPath() : trying F:\data\models\park.ive ... FindFileInPath() : USING F:\data\models\park.ive ive::DataInputStream.setLoadExternalReferenceFiles()=1 Font 0199B608, numberOfTexturesAllocated 1 itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='.' FindFileInPath() : trying F:\dev\OpenSceneGraph\osgEphemeris\bin\osgPlugins-2.7.2\osgdb_freetype.dll ... itr='F:\dev\OpenSceneGraph\Deployment\bin' FindFileInPath() : trying F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_freetype.dll ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_freetype.dll Opened DynamicLibrary osgPlugins-2.7.2/osgdb_freetype.dll FindFileInPath(F:\dev\OpenSceneGraph\Data\fonts\arial.ttf): returning F:\dev\OpenSceneGraph\Data\fonts\arial.ttf FreeTypeLibrary::FreeTypeLibrary() Adding to object cache F:\dev\OpenSceneGraph\Data\fonts\arial.ttf Font 019A5F58, numberOfTexturesAllocated 2 itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning
Re: [osg-users] Reference frame
Hello Sajjad, You can find details on this, and much more good information in OpenSceneGraph Quick Start Guide, chapter : 2.3.3 Go to http://www.skew-matrix.com/OSGQSG/index.html http://www.skew-matrix.com/OSGQSG/index.html , follow the 'lulu.com' link. The guide can be downloaded for free. Paul Martz: thank you *VERY* much for this beautiful guide! Good luck, Hans. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ami guru Sent: woensdag 10 september 2008 4:59 To: OpenSceneGraph Users Subject: [osg-users] Reference frame Hello Forum, OSG Transform allows to specify its reference frame and by default the reference frame is relative. and the other one is the absolute. And the two are specified by different code identifier. We can view transformation in 2 ways. 1. relative to the fixed coordinate system. 2. Local movable coordinate system. There is no practical difference and just a matter of viewpoint. What is the purpose of OSG to specify them separately as follows: osg::Transform::RELATIVE_RF. Any example would be of great help!!! Regards Sajjad ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgTerrain::TerrainTile question
Hi Nicolas, osgTerrain::TerrainTile was named osgTerrain::Terrain in 2.2. osgTerrain since 2.2 was evolved to be more rounded and functional, the naming was changed to better fit what goes on in big paged database, when the Terrain is composed of a hierarchy of TerrainTile. There is now a new class class osgTerrain::Terrain which represent the high level representation of the terrain. In your case loading 3D models with terrain is something that we be best done be pre-processing your data so that the 3D models are inserted into a paged database. If you are familiar with TerraPage then this ideal should be familiar to you. Robert. On Tue, Sep 9, 2008 at 9:30 PM, Coco [EMAIL PROTECTED] wrote: Hi, I'm presently working on a car simulator using OSG 2.2 for the visual. My problem is that I would like to load big areas (such as entire cities or more) which are fragmented in several Open Flight files without loading all those files. I looked at the OSG documentation and found out the osgTerrain::TerrainTile class (which doesn't exist on 2.2 OSG version). By using OSG 2.6, would I be able to load (with the TerrainTile class) only tiles (associated to a FLT file) that I need to see (which means according to the location of the camera)? Or do I need to implement this system by myself to avoid loading all files at the same time? I hope this post is clear enough and wait for answers. Kind regards, Nicolas Duval ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEphemeris
Hi Filip,
Good detective work. This does look like a bug in osgEmpheris, where
it's modifying an image, but then not calling dirty() on it where it
should, as its the dirty() call that tells the Texture object to
upload the new the data. Previously it'll have been relying upon an
inefficiency in the osg::Texture2D::setImage() method that has now
been fixed, so only really worked previously by fluke.
Robert.
On Tue, Sep 9, 2008 at 10:24 PM, Filip Holm [EMAIL PROTECTED] wrote:
I tracked down the osgEphemris texture update problem earlier today. If you
have updated to osg-2.6.0 or later there is a change in how Texture2D works.
Since I do not have the code at hand I'll tell what the problem is and you
should be able to find it quite easy.
Find the method in ephemeris that writes to the _skyTexture you'll notice
that it's code that looks something like this:
Image* image = _skyTexture-getImage();
snip
unsigned int* ptr = image-data;
//Modifying ptr data
snip
_skyTexture-setImage(image); - This is why skytexture texture does
not update!!
//If you replace the setImage call with the following line, everything works
fine:
image-dirty();
new osgCode causing ephemeris bug to appear:
osg::Texture2D::setImage(Image* image)
{
if(_image == image)
return;
.
}
Let me know if this doesn't fix your problem.
Filip
On Tue, Sep 9, 2008 at 3:30 PM, Viggo Løvli [EMAIL PROTECTED] wrote:
Hi Adrian,
I have experienced a similar problem.
First, check that you set a decent radius for the Ephemeris dome. Example:
5000 meters...
Ensure that your far-clip is at least that far away.
Ephemeris can be set to follow camera.
If you do not set this then you must have camera inside the Ephemeris
dome.
If you set it to follow camera, then you are supposed to see it all the
time.
I did however get into a struggle with it where the dome disappeared at
seemingly random times.
It depended on where my camera was and the radius of the Ephemeris dome.
I learnt that if the Ephemeris dome radius was low (5000meters) then it
would often pop away (as in not visible) when I moved my camera away from
world centre. The problem increased the further away I went. At 1meters
from the world centre I would almost never see the Ephemeris dome.
Ephemeris was in fact following my camera, but it does this in a special
way. It actually 'update' its position after culling is almost done. So at
times it may be culled even though you say it shall follow camera.
The solution was to write a node-visitor that turns off culling for
Ephemeris's root node and all of its child nodes.
I am not sure if this is the same problem as you have but you can try it.
Node visitor's apply function looks like this:
void DisableCullingVisitor::apply( osg::Node node )
{
node.setCullingActive( false );
traverse( node );
}
Ensure that it is set up to traverse all children.
Hope it helps,
Viggo
Date: Tue, 9 Sep 2008 14:29:04 +0200
From: [EMAIL PROTECTED]
To: osg-users@lists.openscenegraph.org
Subject: [osg-users] osgEphemeris
Hi just come back to the good old osgEphemeris, i can not see any sky
texture, what is wrong. do someone know the bug.
adrian
--
Adrian Egli
Windows Live Messenger. Hold kontakten med vennene dine.
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Re: [osg-users] osgTerrain::TerrainTile question
Thank you very much for your ideas! I found out the osgDB::DatabasePager class by reading old posts and it looks to fit my problem very well. By using TerraPage I will have to pre-process my databases, whereas with the database pager I don't need to. virtual void requestNodeFilefile:///C:/SHERPA/SHERPA_5.5_Modifiee_Nico/VIS_OSG_DEV/tools/OpenSceneGraph-2.2.0/doc/doxygen/html/a00119.html#b768d3e105f1fb2df66064719ff3bcba(const std::string fileName, osg::Groupfile:///C:/SHERPA/SHERPA_5.5_Modifiee_Nico/VIS_OSG_DEV/tools/OpenSceneGraph-2.2.0/doc/doxygen/html/a00217.html*group, float priority, const osg::FrameStampfile:///C:/SHERPA/SHERPA_5.5_Modifiee_Nico/VIS_OSG_DEV/tools/OpenSceneGraph-2.2.0/doc/doxygen/html/a00191.html *framestamp) Theoretically, I just have to use this function before the camera is close enough to see next area(s). Regards, Nicolas Duval 2008/9/10, Robert Osfield [EMAIL PROTECTED]: Hi Nicolas, osgTerrain::TerrainTile was named osgTerrain::Terrain in 2.2. osgTerrain since 2.2 was evolved to be more rounded and functional, the naming was changed to better fit what goes on in big paged database, when the Terrain is composed of a hierarchy of TerrainTile. There is now a new class class osgTerrain::Terrain which represent the high level representation of the terrain. In your case loading 3D models with terrain is something that we be best done be pre-processing your data so that the 3D models are inserted into a paged database. If you are familiar with TerraPage then this ideal should be familiar to you. Robert. On Tue, Sep 9, 2008 at 9:30 PM, Coco [EMAIL PROTECTED] wrote: Hi, I'm presently working on a car simulator using OSG 2.2 for the visual. My problem is that I would like to load big areas (such as entire cities or more) which are fragmented in several Open Flight files without loading all those files. I looked at the OSG documentation and found out the osgTerrain::TerrainTile class (which doesn't exist on 2.2 OSG version). By using OSG 2.6, would I be able to load (with the TerrainTile class) only tiles (associated to a FLT file) that I need to see (which means according to the location of the camera)? Or do I need to implement this system by myself to avoid loading all files at the same time? I hope this post is clear enough and wait for answers. Kind regards, Nicolas Duval ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEphemeris
Hi Filip, The method suggested in your email does slove the problem.Thank you very much. regards, Mi Haotian On Wed, September 10, 2008 2:39 pm, Filip Holm wrote: Hi Mi, If you have a look at my previous email on this subject you'll find the answer to this problem. It's a bug in osgEphemeris. After re-calculating the skydome image ephemeris fails to set the dirty bit on the result, hence the texture is not updated. Filip On Wed, Sep 10, 2008 at 3:07 AM, [EMAIL PROTECTED] wrote: Hei, I've tried running the osgEphemeris example with OSG2.6 and I could not get it working properly, the stars were alright but the sun never appeared.but the same example works perfectly on osg2.4. So does anyone have any idea what could be the reason for this? regards, Mi Haotian On Tue, September 9, 2008 9:17 pm, Adrian Egli OpenSceneGraph (3D) wrote: Ok, i will be more precises. * nothings strange found with osg notify level set * i am working with latest svn osg * the texture gets calculated, but not displayed on the sky dome * if you wish i can upload the osgEmph. with all my changes. there are some bugs in the osgEmph. VC 7 project. i am working with vc 2005 / adrian ### C:\Users\adrianset OSG OSG_FILE_PATH=F:\dev\OpenSceneGraph\Data;.;F:\data\models; OSG_LIBRARY_PATH=.;F:\dev\OpenSceneGraph\Deployment\bin OSG_WINDOW=256 256 512 512 # F:\dev\OpenSceneGraph\osgEphemeris\binset OSG_NOTIFY_LEVEL=DEBUG F:\dev\OpenSceneGraph\osgEphemeris\binEphemerisViewer.exe park.ive GraphicsContext::setWindowingSystemInterface() 010A1C40 101A0F9C CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() CullSettings::readEnvironmentalVariables() itr='.' FindFileInPath() : trying F:\dev\OpenSceneGraph\osgEphemeris\bin\osgPlugins-2.7.2\osgdb_ive.dll ... itr='F:\dev\OpenSceneGraph\Deployment\bin' FindFileInPath() : trying F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_ive.dll ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_ive.dll Opened DynamicLibrary osgPlugins-2.7.2/osgdb_ive.dll itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\park.ive ... itr='.' FindFileInPath() : trying F:\dev\OpenSceneGraph\osgEphemeris\bin\park.ive ... itr='F:\data\models' FindFileInPath() : trying F:\data\models\park.ive ... FindFileInPath() : USING F:\data\models\park.ive ive::DataInputStream.setLoadExternalReferenceFiles()=1 Font 0199B608, numberOfTexturesAllocated 1 itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='.' FindFileInPath() : trying F:\dev\OpenSceneGraph\osgEphemeris\bin\osgPlugins-2.7.2\osgdb_freetype. dll ... itr='F:\dev\OpenSceneGraph\Deployment\bin' FindFileInPath() : trying F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_freetype.d ll ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Deployment\bin\osgPlugins-2.7.2\osgdb_freetype.d ll Opened DynamicLibrary osgPlugins-2.7.2/osgdb_freetype.dll FindFileInPath(F:\dev\OpenSceneGraph\Data\fonts\arial.ttf): returning F:\dev\OpenSceneGraph\Data\fonts\arial.ttf FreeTypeLibrary::FreeTypeLibrary() Adding to object cache F:\dev\OpenSceneGraph\Data\fonts\arial.ttf Font 019A5F58, numberOfTexturesAllocated 2 itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying F:\dev\OpenSceneGraph\Data\fonts\arial.ttf ... FindFileInPath() : USING F:\dev\OpenSceneGraph\Data\fonts\arial.ttf returning cached instanced of F:\dev\OpenSceneGraph\Data\fonts\arial.ttf itr='F:\dev\OpenSceneGraph\Data' FindFileInPath() : trying
Re: [osg-users] osgTerrain::TerrainTile question
Hi Nicolas, I think you have got the wrong end of the stick. I was suggesting TerraPage as an illustration of how cultural data (3d models) can be stored in with the tiles on disk. In vis-sim industry TerraPage is well known so I used it as as a case in point to save typing lots... FYI, The OSG's TerraPage plugin uses the PagedLOD and the DatabasePager under the hood to provide it's paging functionality. In your case the problem is about creating databases not actually rendering them - as the OSG will do all the paging, and threading for you thanks the DatabasePager and other related classes. The DatabasePage doesn't help you create databases, it's tools like VirtualPlanetBuilder that do this, but... right now VPB doesn't support insertion of cultural data into the tiles, so you'll need post process the database to insert this data. Robert. On Wed, Sep 10, 2008 at 9:49 AM, Coco [EMAIL PROTECTED] wrote: Thank you very much for your ideas! I found out the osgDB::DatabasePager class by reading old posts and it looks to fit my problem very well. By using TerraPage I will have to pre-process my databases, whereas with the database pager I don't need to. virtual void requestNodeFile (const std::string fileName, osg::Group *group, float priority, const osg::FrameStamp *framestamp) Theoretically, I just have to use this function before the camera is close enough to see next area(s). Regards, Nicolas Duval 2008/9/10, Robert Osfield [EMAIL PROTECTED]: Hi Nicolas, osgTerrain::TerrainTile was named osgTerrain::Terrain in 2.2. osgTerrain since 2.2 was evolved to be more rounded and functional, the naming was changed to better fit what goes on in big paged database, when the Terrain is composed of a hierarchy of TerrainTile. There is now a new class class osgTerrain::Terrain which represent the high level representation of the terrain. In your case loading 3D models with terrain is something that we be best done be pre-processing your data so that the 3D models are inserted into a paged database. If you are familiar with TerraPage then this ideal should be familiar to you. Robert. On Tue, Sep 9, 2008 at 9:30 PM, Coco [EMAIL PROTECTED] wrote: Hi, I'm presently working on a car simulator using OSG 2.2 for the visual. My problem is that I would like to load big areas (such as entire cities or more) which are fragmented in several Open Flight files without loading all those files. I looked at the OSG documentation and found out the osgTerrain::TerrainTile class (which doesn't exist on 2.2 OSG version). By using OSG 2.6, would I be able to load (with the TerrainTile class) only tiles (associated to a FLT file) that I need to see (which means according to the location of the camera)? Or do I need to implement this system by myself to avoid loading all files at the same time? I hope this post is clear enough and wait for answers. Kind regards, Nicolas Duval ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Bug? Unable to pick osgSim::SphereSegment
Hi all,
I seem to be unable to pick a osgSim::SphereSegment using a
LineSegmentIntersector. I have many other models in my scene as well that
all work fine with the picker, including loaded models and manually
assembled geometries. It is just the SphereSegment that doesn't respond.
When I click on it, picker-containsIntersections() always returns false:
osgUtil::LineSegmentIntersector* picker;
picker = new osgUtil::LineSegmentIntersector(
osgUtil::Intersector::PROJECTION, ea.getXnormalized(),ea.getYnormalized() );
osgUtil::IntersectionVisitor iv( picker );
viewer-getCamera()-accept( iv );
if ( picker-containsIntersections() ) -- ALWAYS FALSE
{
osgUtil::LineSegmentIntersector::Intersection intersection =
picker-getFirstIntersection();
osg::NodePath nodePath = intersection.nodePath;
node = ( nodePath.size() = 1 )? nodePath[ nodePath.size() - 1 ] : NULL;
}
I will investigate this further, but I was hoping someone might have some
insights as to where to look for what goes wrong. Is this a bug or is it
something specific to SphereSegments? (I am using OSG v2.2)
Thanks!
Morne
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Re: [osg-users] Bug? Unable to pick osgSim::SphereSegment
Hi Morné,
I've never done intersection testing against SphereSegment's before,
so don't have first hand experience to throw at the problem. My best
guess at the lack of results is that the internal Drawable
implementation used in SphereSegmenet isn't implement the
Drawable::accept(PrimitiveFunctor) method which is the method that
the intersection code used to inquire about geometry data. If this is
the case then one will need to implement this method as per the other
Drawable subclasses.
Robert.
On Wed, Sep 10, 2008 at 10:20 AM, Morné Pistorius
[EMAIL PROTECTED] wrote:
Hi all,
I seem to be unable to pick a osgSim::SphereSegment using a
LineSegmentIntersector. I have many other models in my scene as well that
all work fine with the picker, including loaded models and manually
assembled geometries. It is just the SphereSegment that doesn't respond.
When I click on it, picker-containsIntersections() always returns false:
osgUtil::LineSegmentIntersector* picker;
picker = new osgUtil::LineSegmentIntersector(
osgUtil::Intersector::PROJECTION, ea.getXnormalized(),ea.getYnormalized() );
osgUtil::IntersectionVisitor iv( picker );
viewer-getCamera()-accept( iv );
if ( picker-containsIntersections() ) -- ALWAYS FALSE
{
osgUtil::LineSegmentIntersector::Intersection intersection =
picker-getFirstIntersection();
osg::NodePath nodePath = intersection.nodePath;
node = ( nodePath.size() = 1 )? nodePath[ nodePath.size() - 1 ] : NULL;
}
I will investigate this further, but I was hoping someone might have some
insights as to where to look for what goes wrong. Is this a bug or is it
something specific to SphereSegments? (I am using OSG v2.2)
Thanks!
Morne
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Re: [osg-users] osgTerrain::TerrainTile question
2008/9/10, Robert Osfield [EMAIL PROTECTED]: Hi Nicolas, I think you have got the wrong end of the stick. I was suggesting TerraPage as an illustration of how cultural data (3d models) can be stored in with the tiles on disk. In vis-sim industry TerraPage is well known so I used it as as a case in point to save typing lots... FYI, The OSG's TerraPage plugin uses the PagedLOD and the DatabasePager under the hood to provide it's paging functionality. In your case the problem is about creating databases not actually rendering them - as the OSG will do all the paging, and threading for you thanks the DatabasePager and other related classes. The DatabasePage doesn't help you create databases, it's tools like VirtualPlanetBuilder that do this, but... right now VPB doesn't support insertion of cultural data into the tiles, so you'll need post process the database to insert this data. Robert. I think there is a missunderstanding. My problem is to load a big database, not to create it. I already have my database, fragmented in FLT files like I said. So I was suggesting to use DatabasePager to load flt nodes when I need it to. In this case I think I don't have to process any data... I hope I haven't got the wrong end of the stick (again!). Nicolas On Wed, Sep 10, 2008 at 9:49 AM, Coco [EMAIL PROTECTED] wrote: Thank you very much for your ideas! I found out the osgDB::DatabasePager class by reading old posts and it looks to fit my problem very well. By using TerraPage I will have to pre-process my databases, whereas with the database pager I don't need to. virtual void requestNodeFile (const std::string fileName, osg::Group *group, float priority, const osg::FrameStamp *framestamp) Theoretically, I just have to use this function before the camera is close enough to see next area(s). Regards, Nicolas Duval 2008/9/10, Robert Osfield [EMAIL PROTECTED]: Hi Nicolas, osgTerrain::TerrainTile was named osgTerrain::Terrain in 2.2. osgTerrain since 2.2 was evolved to be more rounded and functional, the naming was changed to better fit what goes on in big paged database, when the Terrain is composed of a hierarchy of TerrainTile. There is now a new class class osgTerrain::Terrain which represent the high level representation of the terrain. In your case loading 3D models with terrain is something that we be best done be pre-processing your data so that the 3D models are inserted into a paged database. If you are familiar with TerraPage then this ideal should be familiar to you. Robert. On Tue, Sep 9, 2008 at 9:30 PM, Coco [EMAIL PROTECTED] wrote: Hi, I'm presently working on a car simulator using OSG 2.2 for the visual. My problem is that I would like to load big areas (such as entire cities or more) which are fragmented in several Open Flight files without loading all those files. I looked at the OSG documentation and found out the osgTerrain::TerrainTile class (which doesn't exist on 2.2 OSG version). By using OSG 2.6, would I be able to load (with the TerrainTile class) only tiles (associated to a FLT file) that I need to see (which means according to the location of the camera)? Or do I need to implement this system by myself to avoid loading all files at the same time? I hope this post is clear enough and wait for answers. Kind regards, Nicolas Duval ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgTerrain::TerrainTile question
Hi Nicolas, On Wed, Sep 10, 2008 at 10:55 AM, Coco [EMAIL PROTECTED] wrote: I think there is a missunderstanding. My problem is to load a big database, not to create it. I already have my database, fragmented in FLT files like I said. So I was suggesting to use DatabasePager to load flt nodes when I need it to. In this case I think I don't have to process any data... I hope I haven't got the wrong end of the stick (again!). OpenFlight files aren't paged, you can't just magically page them without creating PagedLOD nodes that decorate them. You have to create some kind of paged database, even if you are creating it dynamically on demand. Also OpenFlight is appalling format for doing format as its 10 times slower than using native binary formats. Your best best to process your source data in such a way as to build a paged .ive database that is composed of hierarchy of tiles. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] fadeIn and Out with blendcolor
Hi Deiter,
From the screenshot It looks to me like you have an depth ordering
issue with transparency. This is a standard problem with rendering of
any transparent objects in your scene - you basically have to drawn
opaque objects first, then all transparent objects sorted in depth.
In your case you objects are overlapping so you have a problem that
can't easily be tackled by simply putting the objects in the
transparent bin - you'll need to break them up into small parts to get
the depth sorting fine grained enough to fix the ordering.
Robert.
On Wed, Sep 10, 2008 at 9:51 AM, Dieter Pfeffer
[EMAIL PROTECTED] wrote:
Hi
I am trying to fade one modell out and another one in; I am using blendfunc
and blendcolor.
However the first modell (when alpha is 0) cuts off the second - see the
attached images:
a) first modell (dumptruck) cuts off the second
b) the transparency is corret
I suppose I use a wrong parameter, but I can't find it out - any idea?
float currentAlpha = 0.0;
void
setAlphaBlendColor()
{
if (blendFunc0 == 0)
{
blendFunc0 = new
osg::BlendFunc(osg::BlendFunc::CONSTANT_ALPHA,
osg::BlendFunc::ONE_MINUS_CONSTANT_ALPHA);
blendColor0 = new osg::BlendColor (osg::Vec4 (1.,1.,1.,0.));
if (loadedModel0.valid()) //dumptruck
{
loadedModel0 -getOrCreateStateSet()-setAttributeAndModes
(blendFunc0,osg::StateAttribute::ON);
loadedModel0 -getOrCreateStateSet()-setAttributeAndModes
(blendColor0,osg::StateAttribute::ON);
}
}
if (blendFunc1 == 0)
{
blendFunc1 = new osg::BlendFunc(osg::BlendFunc::CONSTANT_ALPHA,
osg::BlendFunc::ONE_MINUS_CONSTANT_ALPHA);
blendColor1 = new osg::BlendColor (osg::Vec4 (1.,1.,1.,0.));
if (loadedModel1.valid()) //plane
{
loadedModel1 -getOrCreateStateSet()-setAttributeAndModes
(blendFunc1,osg::StateAttribute::ON);
loadedModel1 -getOrCreateStateSet()-setAttributeAndModes
(blendColor1,osg::StateAttribute::ON);
}
}
if (loadedModel0.valid())
{
osg::Vec4 l_c;
l_c.set(1.,1.,1.,currentAlpha);
blendColor0-setConstantColor(l_c);
}
if (loadedModel1.valid())
{
osg::Vec4 l_c;
l_c.set(1.,1.,1.,1-currentAlpha);
blendColor1-setConstantColor(l_c);
}
}
Thanks
Dieter
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Re: [osg-users] osgTerrain::TerrainTile question
Nicholas, If the openflight files are already subdivided into a grid of tiles referenced into a single master file, then there's some code I posted to the list a couple months ago that will convert them to use pagelods and also convert them to .ive format for faster loading. Search the archives and you should see how to do it. Brian [EMAIL PROTECTED] wrote: - To: OpenSceneGraph Users osg-users@lists.openscenegraph.org From: Coco [EMAIL PROTECTED] Sent by: [EMAIL PROTECTED] Date: 09/10/2008 05:55AM Subject: Re: [osg-users] osgTerrain::TerrainTile question 2008/9/10, Robert Osfield [EMAIL PROTECTED] : Hi Nicolas, I think you have got the wrong end of the stick. I was suggesting TerraPage as an illustration of how cultural data (3d models) can be stored in with the tiles on disk. In vis-sim industry TerraPage is well known so I used it as as a case in point to save typing lots... FYI, The OSG's TerraPage plugin uses the PagedLOD and the DatabasePager under the hood to provide it's paging functionality. In your case the problem is about creating databases not actually rendering them - as the OSG will do all the paging, and threading for you thanks the DatabasePager and other related classes. The DatabasePage doesn't help you create databases, it's tools like VirtualPlanetBuilder that do this, but... right now VPB doesn't support insertion of cultural data into the tiles, so you'll need post process the database to insert this data. Robert. I think there is a missunderstanding. My problem is to load a big database, not to create it. I already have my database, fragmented in FLT files like I said. So I was suggesting to use DatabasePager to load flt nodes when I need it to. In this case I think I don't have to process any data... I hope I haven't got the wrong end of the stick (again!). Nicolas On Wed, Sep 10, 2008 at 9:49 AM, Coco [EMAIL PROTECTED] wrote: Thank you very much for your ideas! I found out the osgDB::DatabasePager class by reading old posts and it looks to fit my problem very well. By using TerraPage I will have to pre-process my databases, whereas with the database pager I don't need to. virtual void requestNodeFile (const std::string fileName, osg::Group *group, float priority, const osg::FrameStamp *framestamp) Theoretically, I just have to use this function before the camera is close enough to see next area(s). Regards, Nicolas Duval 2008/9/10, Robert Osfield [EMAIL PROTECTED] : Hi Nicolas, osgTerrain::TerrainTile was named osgTerrain::Terrain in 2.2. osgTerrain since 2.2 was evolved to be more rounded and functional, the naming was changed to better fit what goes on in big paged database, when the Terrain is composed of a hierarchy of TerrainTile. There is now a new class class osgTerrain::Terrain which represent the high level representation of the terrain. In your case loading 3D models with terrain is something that we be best done be pre-processing your data so that the 3D models are inserted into a paged database. If you are familiar with TerraPage then this ideal should be familiar to you. Robert. On Tue, Sep 9, 2008 at 9:30 PM, Coco [EMAIL PROTECTED] wrote: Hi, I'm presently working on a car simulator using OSG 2.2 for the visual. My problem is that I would like to load big areas (such as entire cities or more) which are fragmented in several Open Flight files without loading all those files. I looked at the OSG documentation and found out the osgTerrain::TerrainTile class (which doesn't exist on 2.2 OSG version). By using OSG 2.6, would I be able to load (with the TerrainTile class) only tiles (associated to a FLT file) that I need to see (which means according to the location of the camera)? Or do I need to implement this system by myself to avoid loading all files at the same time? I hope this post is clear enough and wait for answers. Kind regards, Nicolas Duval ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users
Re: [osg-users] Precipitation Effect
Hi Robert, Thank you for quick response. I have three PrecipitationEffect active at one time. I am trying for snow, rain, hail effect active at one time. Selman On Wed, Sep 10, 2008 at 3:35 PM, Robert Osfield [EMAIL PROTECTED]wrote: Hi Selman, On Wed, Sep 10, 2008 at 1:13 PM, selman duatepe [EMAIL PROTECTED] wrote: I have multiple precipitation effect objects. When I set the wind parameters of precipitation effect objects, only one precipitation effect object influence this wind parameters, the others are not. Anyone experienced about this problem? I haven't personally tried multiple osgParticle::PrecipitationEffect, when I wrote it I had in mind that only one would likely be active at any one time. Do you have multiple PrecipitationEffect active at one time? What effect are you trying for? If you have multiple effects on at one time then perhaps lazy state updating on the uniform might be causing problems. This is just a wild guess though. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Precipitation Effect
Hi Selman, On Wed, Sep 10, 2008 at 1:13 PM, selman duatepe [EMAIL PROTECTED] wrote: I have multiple precipitation effect objects. When I set the wind parameters of precipitation effect objects, only one precipitation effect object influence this wind parameters, the others are not. Anyone experienced about this problem? I haven't personally tried multiple osgParticle::PrecipitationEffect, when I wrote it I had in mind that only one would likely be active at any one time. Do you have multiple PrecipitationEffect active at one time? What effect are you trying for? If you have multiple effects on at one time then perhaps lazy state updating on the uniform might be causing problems. This is just a wild guess though. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osg-users subscription pass 2000 mark!
Hi All, I checked the number of subscribers on osg-users this morning and found that there are now 2002 subscribers. A warm welcome to all the new developers :-) Our last milestone of 1900 was passed back in May, and the last big milestone of 1000 subscribers was back in May 2005. This means we are roughly growing at average of about 0.8 a day, a rate that the we fluctuate around month by month, but not by much. Considering all that is happening in the industry outwith the OSG project this consistency of growth is somewhat surprising - Scene Graphs and OpenGL are still just as relevant today as in the early years of the project (at the turn of the millennium). How the osg-users figure relates to actual osg users figures is hard to know. Some users subscribe more than once, while others use one address for a whole team that use the OSG, and some developers are on the list but just watching rather than using, while others who use the osg unsubscribe once they are to up speed on the software but still use the OSG. If one then tries to work out how many end users use software that uses the OSG rather than number of developers working with it, well one basically has nothing to go on - being open source that is no mechanism for tracking usage once the source code is downloaded. Perhaps members of osg-users can provide some figures of there own user community. Cheers, Robert. ps. If you are curious about historical community figures have a look at the community activity page on the wiki, something I'm maintain on adhoc basis to keep track of how we are doing, and how this compares to other open source scene graphs: http://www.openscenegraph.org/projects/osg/wiki/Community/CommunityActivity ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] CMake cmpilation
Hello all, I'm compiling osg2.0 on visual studio. The project was created with CMake. I changed the compiler to intel compiler, and now nothing compiles. I get the errors: 1CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. 1Missing variable is: 1CMAKE_SIZEOF_VOID_P Any ideas why? How does the CMake works anyway?? I didn't see calls to it in the pre-build processing, include, or anything. Thanks, Guy. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OverlayNode bug
Hi Mathieu, I don't know the cause/or a solution to the problem, but in the case of VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY a GLSL vertex and fragment program is used to generate the results, so I'd guess that the shader simply doesn't know about the texture blending required. Have a look into the implementation to see if you can get things work. Robert. On Wed, Sep 10, 2008 at 3:05 PM, Mathieu MARACHE [EMAIL PROTECTED] wrote: Hi, I happened to be testing the OverlayNode with transparent nodes and came across a difficult to spot bug. There are in fact three techniques that you can assign to an OverlayNode : osgSim::OverlayNode::OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY; osgSim::OverlayNode::VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY; osgSim::OverlayNode::VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY; Techniques 1 and 2 are producing expected results while technique 3 doesn't handle the transparency I haven't been able to spot where it goes wrong, I'm posting this in case someone has a hint to where the problem lies. -- Mathieu ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CMake cmpilation
Hello Robert. Yes, I intend to upgrade... and yes, I'm looking at the CMake web site. Since I dwelt there fore about an hour wih no significant improvement, I just hoped someone already encountered this problem. Thanks anyway, Guy. Hi Guy, Might I suggest you have a look at the Cmake website to see if it supports the Intel compilers. Also I have to recommend moving from OSG-2.0 to OSG-2.6 as the later supports latest CMake versions which are more likely to support niche compilers. Robert. On Wed, Sep 10, 2008 at 3:09 PM, Guy [EMAIL PROTECTED] wrote: Hello all, I'm compiling osg2.0 on visual studio. The project was created with CMake. I changed the compiler to intel compiler, and now nothing compiles. I get the errors: 1CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. 1Missing variable is: 1CMAKE_SIZEOF_VOID_P Any ideas why? How does the CMake works anyway?? I didn't see calls to it in the pre-build processing, include, or anything. Thanks, Guy. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] תשובה: CMake cmpilation
Thanks, I'll look for this IF(MSVC) and try to remove it so it will always... Guy. Hi Guy, I'm compiling osg2.0 on visual studio. The project was created with CMake. I changed the compiler to intel compiler, and now nothing compiles. I get the errors: 1CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. 1Missing variable is: 1CMAKE_SIZEOF_VOID_P Any ideas why? How does the CMake works anyway?? I didn't see calls to it in the pre-build processing, include, or anything. First of all, I haven't seen anyone compiling OSG with the Intel compiler, so I have no idea if this is even supposed to work. If it isn't widely tested, chances are it won't work without some modifications since the CMake code is peppered with IF(MSVC)... statements where equivalents would probably be needed for the Intel compiler. On your more general question, I don't know on the Intel compiler, but on Visual Studio it adds some custom build targets which call cmake with scripts. I'm not sure how it's implemented exactly, but that's my general understanding of it. The ZERO_CHECK target checks that your CMake files haven't changed since the projects were generated, and regenerates the projects automatically if they were, for example. Hope this helps, J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] תשובה: CMake cmpilation
Hi Guy, I'll look for this IF(MSVC) and try to remove it so it will always... You're aware that's not really a fix... First of all you might need something different in your case, instead of always or never... (for example I'm reasonably sure the compiler options will be different) Second, when you'll want to compile a new release of OSG again you'll have to re-do the work. A better solution would be to try and fix the problems for your compiler without breaking the others, and submit the changed files. It's up to you of course. J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgTerrain::TerrainTile question
2008/9/10, Brian R Hill [EMAIL PROTECTED]: Nicholas, If the openflight files are already subdivided into a grid of tiles referenced into a single master file, then there's some code I posted to the list a couple months ago that will convert them to use pagelods and also convert them to .ive format for faster loading. Search the archives and you should see how to do it. Brian, Thanks a lot! I'm gonna take a look at this! Nicolas Brian [EMAIL PROTECTED] wrote: - To: OpenSceneGraph Users osg-users@lists.openscenegraph.org From: Coco [EMAIL PROTECTED] Sent by: [EMAIL PROTECTED] Date: 09/10/2008 05:55AM Subject: Re: [osg-users] osgTerrain::TerrainTile question 2008/9/10, Robert Osfield [EMAIL PROTECTED] : Hi Nicolas, I think you have got the wrong end of the stick. I was suggesting TerraPage as an illustration of how cultural data (3d models) can be stored in with the tiles on disk. In vis-sim industry TerraPage is well known so I used it as as a case in point to save typing lots... FYI, The OSG's TerraPage plugin uses the PagedLOD and the DatabasePager under the hood to provide it's paging functionality. In your case the problem is about creating databases not actually rendering them - as the OSG will do all the paging, and threading for you thanks the DatabasePager and other related classes. The DatabasePage doesn't help you create databases, it's tools like VirtualPlanetBuilder that do this, but... right now VPB doesn't support insertion of cultural data into the tiles, so you'll need post process the database to insert this data. Robert. I think there is a missunderstanding. My problem is to load a big database, not to create it. I already have my database, fragmented in FLT files like I said. So I was suggesting to use DatabasePager to load flt nodes when I need it to. In this case I think I don't have to process any data... I hope I haven't got the wrong end of the stick (again!). Nicolas On Wed, Sep 10, 2008 at 9:49 AM, Coco [EMAIL PROTECTED] wrote: Thank you very much for your ideas! I found out the osgDB::DatabasePager class by reading old posts and it looks to fit my problem very well. By using TerraPage I will have to pre-process my databases, whereas with the database pager I don't need to. virtual void requestNodeFile (const std::string fileName, osg::Group *group, float priority, const osg::FrameStamp *framestamp) Theoretically, I just have to use this function before the camera is close enough to see next area(s). Regards, Nicolas Duval 2008/9/10, Robert Osfield [EMAIL PROTECTED] : Hi Nicolas, osgTerrain::TerrainTile was named osgTerrain::Terrain in 2.2. osgTerrain since 2.2 was evolved to be more rounded and functional, the naming was changed to better fit what goes on in big paged database, when the Terrain is composed of a hierarchy of TerrainTile. There is now a new class class osgTerrain::Terrain which represent the high level representation of the terrain. In your case loading 3D models with terrain is something that we be best done be pre-processing your data so that the 3D models are inserted into a paged database. If you are familiar with TerraPage then this ideal should be familiar to you. Robert. On Tue, Sep 9, 2008 at 9:30 PM, Coco [EMAIL PROTECTED] wrote: Hi, I'm presently working on a car simulator using OSG 2.2 for the visual. My problem is that I would like to load big areas (such as entire cities or more) which are fragmented in several Open Flight files without loading all those files. I looked at the OSG documentation and found out the osgTerrain::TerrainTile class (which doesn't exist on 2.2 OSG version). By using OSG 2.6, would I be able to load (with the TerrainTile class) only tiles (associated to a FLT file) that I need to see (which means according to the location of the camera)? Or do I need to implement this system by myself to avoid loading all files at the same time? I hope this post is clear enough and wait for answers. Kind regards, Nicolas Duval ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org
[osg-users] תשובה: תשובה: CMake cmpil ation
If it helps anyone, I added the line SET(CMAKE_SIZEOF_VOID_P 4) In the file CMakeLists.txt in the project ALL_BUILD, and it seems to work. I only hope void* is really four bytes long and not 8 :) Btw, the intel compiler should provide many intel specific optimizations to the complied code, including auto parallelism and vectorization, that should improve performance. If I'll get significant upgrade I'll post it here. Guy. Thanks, I'll look for this IF(MSVC) and try to remove it so it will always... Guy. Hi Guy, I'm compiling osg2.0 on visual studio. The project was created with CMake. I changed the compiler to intel compiler, and now nothing compiles. I get the errors: 1CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. 1Missing variable is: 1CMAKE_SIZEOF_VOID_P Any ideas why? How does the CMake works anyway?? I didn't see calls to it in the pre-build processing, include, or anything. First of all, I haven't seen anyone compiling OSG with the Intel compiler, so I have no idea if this is even supposed to work. If it isn't widely tested, chances are it won't work without some modifications since the CMake code is peppered with IF(MSVC)... statements where equivalents would probably be needed for the Intel compiler. On your more general question, I don't know on the Intel compiler, but on Visual Studio it adds some custom build targets which call cmake with scripts. I'm not sure how it's implemented exactly, but that's my general understanding of it. The ZERO_CHECK target checks that your CMake files haven't changed since the projects were generated, and regenerates the projects automatically if they were, for example. Hope this helps, J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CMake cmpilation
Hi Guy, I'm compiling osg2.0 on visual studio. The project was created with CMake. I changed the compiler to intel compiler, and now nothing compiles. I get the errors: 1CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. 1Missing variable is: 1CMAKE_SIZEOF_VOID_P Any ideas why? How does the CMake works anyway?? I didn't see calls to it in the pre-build processing, include, or anything. First of all, I haven't seen anyone compiling OSG with the Intel compiler, so I have no idea if this is even supposed to work. If it isn't widely tested, chances are it won't work without some modifications since the CMake code is peppered with IF(MSVC)... statements where equivalents would probably be needed for the Intel compiler. On your more general question, I don't know on the Intel compiler, but on Visual Studio it adds some custom build targets which call cmake with scripts. I'm not sure how it's implemented exactly, but that's my general understanding of it. The ZERO_CHECK target checks that your CMake files haven't changed since the projects were generated, and regenerates the projects automatically if they were, for example. Hope this helps, J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] תשובה: תשובה: CMake cmpil ation
Your are obviously right. But many times I start with the quick and dirty solution and only if it works, I adjust it to be a real general solution. Anyway, in this case the IF(MSVC) didn't do the trick but setting the size of pointer value, did. Guy. Hi Guy, I'll look for this IF(MSVC) and try to remove it so it will always... You're aware that's not really a fix... First of all you might need something different in your case, instead of always or never... (for example I'm reasonably sure the compiler options will be different) Second, when you'll want to compile a new release of OSG again you'll have to re-do the work. A better solution would be to try and fix the problems for your compiler without breaking the others, and submit the changed files. It's up to you of course. J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] תשובה: תשובה: CMak e cmpilation
Hi Guy, Anyway, in this case the IF(MSVC) didn't do the trick but setting the size of pointer value, did. This setting should normally be automatically set by CMake (it compiles a small test program using your configured compiler at the start of the generation process). If that didn't happen correctly it should probably be reported as a bug in CMake. Good to know you're progressing, at least. J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgal with multiple sounds
Hi osg-users, I've been playing around with the osgal audio library trying to get some basic 3D sound working (with openscenegraph 2.4 I believe). I've had some success attaching a single sound to a single object, but I've been having some problems getting multiple sounds to play at the same time. Even with the demos, it alternates between playing the two sounds instead of playing them simultaneously. I'm pretty sure my computer has multiple sound channels, and I'm curious if I'm just using outdated libraries, or if it's working as intended. Has anyone had any luck with osgal? Thanks ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgal with multiple sounds
Hi,Joe Lyga I ever meet the same problem one year before,but it still not solved.I think that osgAL have two sound channel limited.But i don't know why! Same Confused Person Donlin 在2008-09-10，Joe Lyga [EMAIL PROTECTED] 写道： Hi osg-users, I've been playing around with the osgal audio library trying to get some basic 3D sound working (with openscenegraph 2.4 I believe). I've had some success attaching a single sound to a single object, but I've been having some problems getting multiple sounds to play at the same time. Even with the demos, it alternates between playing the two sounds instead of playing them simultaneously. I'm pretty sure my computer has multiple sound channels, and I'm curious if I'm just using outdated libraries, or if it's working as intended. Has anyone had any luck with osgal? Thanks ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Wiki link for OSG-ODE
Hello all, I'm working on a small and simple GPL game engine called PVLE ( http://pvle.sourceforge.net ), that tries to integrate OSG, ODE and such. As I saw some people trying to integrate ODE with OSG, do you think it would be wise to put a link on OSG's wiki? If yes, in which category (Applications, nodekits, other...)? Thanks! Sukender _ Email envoyé avec Windows Live Hotmail. Dites adieux aux spam et virus, passez à Hotmail ! C'est gratuit ! http://www.windowslive.fr/hotmail/default.asp ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Problem rendering Overlay node
Hi all, I am trying to use overlay node to overlay a sphere on top of a cylinder, but i am getting the black area(Clear color) around the sphere as shown in the snapshot. Ideally i want to have just sphere on top of cylinder. My code for setting the overlay is // Create overlay node osg::ref_ptrosgSim::OverlayNode olNode = new osgSim::OverlayNode(osgSim::OverlayNode::OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY); olNode-setOverlaySubgraph(sphNode); olNode-setRenderTargetImplementation(osg::Camera::FRAME_BUFFER); olNode-setOverlayTextureSizeHint(1024); olNode-setOverlayBaseHeight(0.0); olNode-setTexEnvMode(GL_BLEND); olNode-setOverlayClearColor(osg::Vec4(1.0, 0.0, 0.0, 0.0)); osg::ref_ptrosg::Group grpNode = new osg::Group; olNode-addChild(cylNode); Can someone tell me what am i doing wrong ? -- Rahul Jain, Member of Technical Staff, Visualization Experts Limited. www.vizexperts.com +91-98109-83697 (M) inline: ov.png___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Returning ref_ptr vs. ref_ptr::get()
[Part 1:]
I'm relatively new to Open Scene Graph, so please forgive me if this
has been answered a hundred times already.
In the Open Scene Graph Quick Start Guide, Paul Martz gives several
examples where his functions return a ref_ptr. In almost every
case, however, he returns the raw pointer address by returning the
result of ref_ptr::get() on his ref_ptrclass T object.
For a simple example, on page 37 (Section 2.1.3) he gives the following method:
osg::ref_ptrosg::Group createGroup()
{
osg::ref_ptrosg::Group grp = new osg::Group;
//comments
return grp.get()
}
I understand that this will (or *should*) implicitly call the ctor:
ref_ptr(T* ptr)
and create the proper ref_ptr. What I don't understand is why he
doesn't just return grp and let it call the copy ctor.
At first I thought it might be a scope issue, but if grp falls out
of scope, grp._ptr goes away with it.
My second thought was that he is using a slightly less-complex ctor,
but I doubt the performance gain is measurable.
My only other thought is that when he returns, for instance, a
ref_ptrosg::Group from a method with a return type of
ref_ptrosg::Node, the ref_ptr is created dynamically instead of
coerced across ref_ptrclass T types. As long as it gets cast up to
a ref_ptrbase class, however, I don't see this as a problem.
Could one of you shed some light on this for me? Is it just a coding
style decision on his part, or is this the right way? I've seen
other examples where the ref_ptr itself is just returned. I feel
like this is the way to go, but I want to write only good code with
OSG.
---
[Part 2:]
On a related note, there are some things about the use of ref_ptr
that I'm not sure I'm completely happy with. If the OSG library is
going to make full use of ref_ptr for memory management, then it
seems like the member functions that take raw pointers should be
changed to use ref_ptr instead.
I understand that there may be cases when a new object is to be added
dynamically to another object's references, i.e.:
grp-addChild(new osg::Geode);
However, this could be handled by either providing the secondary
member functions for these special cases, or by letting the programmer
handle the conversion. In fact, the programmer could let implicit
conversion handle this if he trusts his compiler. Internally, classes
such as osg::Group simply use this implicit conversion when they add
the raw pointer (Node *) to their child list (see implementation of
osg::Group::insertChild). In some cases, more than one implicit
conversion takes place (Geode * -- Node * -- ref_ptrNode).
I say this because it seems that using ref_ptr::get() breaks the
rules of reference pointers, because it allows you an easy way to
ignore the reference counting. The class functions encourage the use
of ref_ptr::get(), as well. While this works fine with careful
programming, it opens up some easy-to-make mistakes, and invites abuse
and the forming of bad habits by less skilled programmers. If
another programmer has to maintain or debug this pointer-abusive code,
it could make finding the problems extremely difficult. I already
know of one case where a developer simply removed all the non-required
uses of ref_ptr to just make another programmer's errors go away as
quickly as possible.
If I remember correctly, Java purposely doesn't give you access to the
base addresses its references point to. At least, I can't think of an
easy way to access them. This is all in the name of safe garbage
collection and data hiding, which ref_ptr::get() feels like it's
breaking, at least to me. Shouldn't we let ref_ptr do it's job and
not mess with its internal structures, for the same reason we
shouldn't call ref() and unref() on osg::Referenced family objects?
That's the view from here. I admit to being only partially informed.
If this makes somebody on the dev team think, well, I guess that can
only be positive, even if I'm wrong. What I would really like,
however, is for someone who knows more about what's going on in OSG to
set the record straight for me. I'd like to hear it from your side so
I can get a feel for where OSG is coming from. Remember, I'm new to
OSG, so talk slowly and don't hurt my feelings ;-)
Thanks,
Cliff Taylor
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Re: [osg-users] Returning ref_ptr vs. ref_ptr::get()
Cliff Taylor wrote: If I remember correctly, Java purposely doesn't give you access to the base addresses its references point to. At least, I can't think of an easy way to access them. This is all in the name of safe garbage collection and data hiding, which ref_ptr::get() feels like it's breaking, at least to me. Shouldn't we let ref_ptr do it's job and not mess with its internal structures, for the same reason we shouldn't call ref() and unref() on osg::Referenced family objects? One thing to remember is that garbage collection (as in Java) is different than managed pointers. The first is a full solution, the second is a nice helper. For example, Java handles circular references, doesn't require buy in by all containing classes, etc.. ref_ptr doesn't have this luxury so it is frequently necessary to work around it. In light of that, it would be impossible to get rid of get(). -Paul (a different Paul. ;)) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] unrendered objects creating performance problems?
Thanks for the culling mode tip Robert. My terrain was generated using VirtualPlanet builder, but I didn't do it, so I'll get back to you when I get more details on that. I'm running my application on 2 machines getting similar results: a 64-bit-Linux-86 with a double headed Nvidia Quadro 3450. The other is an intel MacBook Pro with a GForce 8600. The available RAM for both is way over 1GB. I am trying OSG 2.6.0. It usually runs smoothly at 60fps, but on this particular terrain, when zoomed in, and at angles on which I look far into the distance, the framerate drops to below 20, which is unacceptable for my application. I believe I end up drawing way too many triangles for the computer to handle efficiently. I am trying to find ways to run at a solid 60fps no matter what. -Jose On Wed, September 10, 2008 12:56 am, Robert Osfield wrote: Hi Joseanibal, By default the OSG does not cull on the near/far planes, and near/far clipping is done down on the GPU only affect the fill rate performance of your application. You can enable culling on the near/far planes, but you have to be careful about setting your near/far planes so that encompass your scene - as the OSG by default computes the near/far planes it'll hide the inappropriately set near/far planes so by toggling these features on you might suddenly find parts of foreground or distance disappearing. To switch off the compute of near far use the Camera methods (inherited from osg::CullSettings) : viewer.getCamera()-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR) To enable the culling against the far plane use methods inherited from osg::CullSettings again: int cullingMode = viewer.getCamera()-getCullingMode() | osg::CullSettings::FAR_PLANE_CULLING; viewer.getCamera()-setCullingMode(cullingMode); All of this doesn't really address the performance issue too much. You don't mention the nature of your database at all i.e. how you built it, what scene graph components it uses, or what hardware, or OS, or OSG version you are using, all this info is essential for others to know enough to really guide you in the right direction. Robert. On Wed, Sep 10, 2008 at 1:08 AM, Joseanibal Colon Ramos [EMAIL PROTECTED] wrote: Hi all, I was hoping someone has an idea about why I am encountering the following problem: I have a big terrain and on certain viewing angles it contains a huge amount of triangles to draw and puts a big strain on OSG's performance. I tried playing around with near/far clipping planes to improve performance, by cutting out a lot of the rendering, to the point only a very small fraction (and even none at all) of the terrain is seen through my camera. OSG's framerate, however, behaves just as if I was looking at the whole thing and drawing all the triangles. At certain angles, the framerate increases (where small number of triangles would normally be - even thought I don't see anything), and at other angles, it decreases (the same angles at which the viewer normally tries to draw a large number of triangles - even though I can't see anything). What is going on here?!? help! -J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Returning ref_ptr vs. ref_ptr::get()
Hi Cliff,
I won't dive in deep in this topic as it's been covered many times and
there is docs up on the wiki.
W.r.t access to .get(), yes this in theory can lead to misuse, but
it's also key to genuine uses - such as where a C pointer is required.
I tend to assume that OSG users are grown ups and know how to code, I
rather not penalise the good programmers for the inabilities of the
few engineers who can't code their way out of wet paper bag.
The code example you gave doesn't look clean, there is no need to pass
back a C pointer from a function that returns a ref_ptr, unless the
types of different. Cases where the types can be different is when
using a ref_ptrGroup internally and then passing out a ref_ptrNode
as the return type, here there is now way to downcast a ref_ptrGroup
to ref_ptrNode. One can do this downcast use member templates,
but... not all compilers and all the platforms we support support this
feature so we have had to make do with out it. Pain in the butt, but
that's the way of the wacky C++ world.
On a general note, I tend to use ref_ptr when they are required, and
C* pointers elsewhere, I choose ref_ptr when I want robust and easy
memory management, I use C pointers where no particular harm will come
from their usage, and performance will be gained (please note passing
ref_ptr around introduces thrashing of the renderenceCount() which
kills performance if you aren't careful). Mixing code with ref_ptr
and C* can be done perfectly safely, but you do need to understand the
consequences - ref counting is one of the fundamental concepts that
all C++ programmers need to grasp very early in their careers, long
before they even come across software like the OSG.
Robert.
On Wed, Sep 10, 2008 at 7:22 PM, Cliff Taylor [EMAIL PROTECTED] wrote:
[Part 1:]
I'm relatively new to Open Scene Graph, so please forgive me if this
has been answered a hundred times already.
In the Open Scene Graph Quick Start Guide, Paul Martz gives several
examples where his functions return a ref_ptr. In almost every
case, however, he returns the raw pointer address by returning the
result of ref_ptr::get() on his ref_ptrclass T object.
For a simple example, on page 37 (Section 2.1.3) he gives the following
method:
osg::ref_ptrosg::Group createGroup()
{
osg::ref_ptrosg::Group grp = new osg::Group;
//comments
return grp.get()
}
I understand that this will (or *should*) implicitly call the ctor:
ref_ptr(T* ptr)
and create the proper ref_ptr. What I don't understand is why he
doesn't just return grp and let it call the copy ctor.
At first I thought it might be a scope issue, but if grp falls out
of scope, grp._ptr goes away with it.
My second thought was that he is using a slightly less-complex ctor,
but I doubt the performance gain is measurable.
My only other thought is that when he returns, for instance, a
ref_ptrosg::Group from a method with a return type of
ref_ptrosg::Node, the ref_ptr is created dynamically instead of
coerced across ref_ptrclass T types. As long as it gets cast up to
a ref_ptrbase class, however, I don't see this as a problem.
Could one of you shed some light on this for me? Is it just a coding
style decision on his part, or is this the right way? I've seen
other examples where the ref_ptr itself is just returned. I feel
like this is the way to go, but I want to write only good code with
OSG.
---
[Part 2:]
On a related note, there are some things about the use of ref_ptr
that I'm not sure I'm completely happy with. If the OSG library is
going to make full use of ref_ptr for memory management, then it
seems like the member functions that take raw pointers should be
changed to use ref_ptr instead.
I understand that there may be cases when a new object is to be added
dynamically to another object's references, i.e.:
grp-addChild(new osg::Geode);
However, this could be handled by either providing the secondary
member functions for these special cases, or by letting the programmer
handle the conversion. In fact, the programmer could let implicit
conversion handle this if he trusts his compiler. Internally, classes
such as osg::Group simply use this implicit conversion when they add
the raw pointer (Node *) to their child list (see implementation of
osg::Group::insertChild). In some cases, more than one implicit
conversion takes place (Geode * -- Node * -- ref_ptrNode).
I say this because it seems that using ref_ptr::get() breaks the
rules of reference pointers, because it allows you an easy way to
ignore the reference counting. The class functions encourage the use
of ref_ptr::get(), as well. While this works fine with careful
programming, it opens up some easy-to-make mistakes, and invites abuse
and the forming of bad habits by less skilled programmers. If
another programmer has to maintain or debug this pointer-abusive
Re: [osg-users] Reference frame
Hello Hans, The queries are the result of the going through the link that you have sent. Regards Sajjad On Wed, Sep 10, 2008 at 9:24 AM, Elbers, H.P. [EMAIL PROTECTED]wrote: Hello Sajjad, You can find details on this, and much more good information in OpenSceneGraph Quick Start Guide, chapter : 2.3.3 Go to *http://www.skew-matrix.com/OSGQSG/index.html*http://www.skew-matrix.com/OSGQSG/index.html, follow the 'lulu.com' link. The guide can be downloaded for free. Paul Martz: thank you *VERY* much for this beautiful guide! Good luck, Hans. -- *From:* [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED] *On Behalf Of *ami guru *Sent:* woensdag 10 september 2008 4:59 *To:* OpenSceneGraph Users *Subject:* [osg-users] Reference frame Hello Forum, OSG Transform allows to specify its reference frame and by default the reference frame is relative. and the other one is the absolute. And the two are specified by different code identifier. We can view transformation in 2 ways. 1. relative to the fixed coordinate system. 2. Local movable coordinate system. There is no practical difference and just a matter of viewpoint. What is the purpose of OSG to specify them separately as follows: osg::Transform::RELATIVE_RF. Any example would be of great help!!! Regards Sajjad ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] unrendered objects creating performance problems?
Hi Jose, If you build your VPB terrain using --terrain it'll produce terrain which a high degree of geometry, but you can dynamically control how much geometry is rendered by setting the osgTerrain::Terrain::setSampleRatio(float). You can also control the LOD scale via viewer.getCamera()-setLODScale(float). See the osgmultitexturecontrol example for illustration of this in action. The LODScale is a value you can vary per frame, so if you want to change it in response to load you can. The SampleRatio is something that'll be used on building of terrain geometry, and changing this on the fly would force a rebuild of the geometry so isn't something you want to vary per frame. I'd suggest altering the SampleRatio fit different hardware, then use LODScale on the fly. Robert. On Wed, Sep 10, 2008 at 7:52 PM, Joseanibal Colon Ramos [EMAIL PROTECTED] wrote: Thanks for the culling mode tip Robert. My terrain was generated using VirtualPlanet builder, but I didn't do it, so I'll get back to you when I get more details on that. I'm running my application on 2 machines getting similar results: a 64-bit-Linux-86 with a double headed Nvidia Quadro 3450. The other is an intel MacBook Pro with a GForce 8600. The available RAM for both is way over 1GB. I am trying OSG 2.6.0. It usually runs smoothly at 60fps, but on this particular terrain, when zoomed in, and at angles on which I look far into the distance, the framerate drops to below 20, which is unacceptable for my application. I believe I end up drawing way too many triangles for the computer to handle efficiently. I am trying to find ways to run at a solid 60fps no matter what. -Jose On Wed, September 10, 2008 12:56 am, Robert Osfield wrote: Hi Joseanibal, By default the OSG does not cull on the near/far planes, and near/far clipping is done down on the GPU only affect the fill rate performance of your application. You can enable culling on the near/far planes, but you have to be careful about setting your near/far planes so that encompass your scene - as the OSG by default computes the near/far planes it'll hide the inappropriately set near/far planes so by toggling these features on you might suddenly find parts of foreground or distance disappearing. To switch off the compute of near far use the Camera methods (inherited from osg::CullSettings) : viewer.getCamera()-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR) To enable the culling against the far plane use methods inherited from osg::CullSettings again: int cullingMode = viewer.getCamera()-getCullingMode() | osg::CullSettings::FAR_PLANE_CULLING; viewer.getCamera()-setCullingMode(cullingMode); All of this doesn't really address the performance issue too much. You don't mention the nature of your database at all i.e. how you built it, what scene graph components it uses, or what hardware, or OS, or OSG version you are using, all this info is essential for others to know enough to really guide you in the right direction. Robert. On Wed, Sep 10, 2008 at 1:08 AM, Joseanibal Colon Ramos [EMAIL PROTECTED] wrote: Hi all, I was hoping someone has an idea about why I am encountering the following problem: I have a big terrain and on certain viewing angles it contains a huge amount of triangles to draw and puts a big strain on OSG's performance. I tried playing around with near/far clipping planes to improve performance, by cutting out a lot of the rendering, to the point only a very small fraction (and even none at all) of the terrain is seen through my camera. OSG's framerate, however, behaves just as if I was looking at the whole thing and drawing all the triangles. At certain angles, the framerate increases (where small number of triangles would normally be - even thought I don't see anything), and at other angles, it decreases (the same angles at which the viewer normally tries to draw a large number of triangles - even though I can't see anything). What is going on here?!? help! -J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Returning ref_ptr vs. ref_ptr::get()
On Wed, Sep 10, 2008 at 2:00 PM, Robert Osfield [EMAIL PROTECTED] wrote: Hi Cliff, I won't dive in deep in this topic as it's been covered many times and there is docs up on the wiki. W.r.t access to .get(), yes this in theory can lead to misuse, but it's also key to genuine uses - such as where a C pointer is required. I tend to assume that OSG users are grown ups and know how to code, I rather not penalise the good programmers for the inabilities of the few engineers who can't code their way out of wet paper bag. The code example you gave doesn't look clean, there is no need to pass back a C pointer from a function that returns a ref_ptr, unless the types of different. Cases where the types can be different is when using a ref_ptrGroup internally and then passing out a ref_ptrNode as the return type, here there is now way to downcast a ref_ptrGroup to ref_ptrNode. One can do this downcast use member templates, but... not all compilers and all the platforms we support support this feature so we have had to make do with out it. Pain in the butt, but that's the way of the wacky C++ world. OK, thanks. That's about what I had figured. Passing back the C pointer when you're changing the reference type is the safe thing to do, but it's otherwise unnecessary. I'm still trying to decide if I agree with your statement about penalizing the good programmers by having the library calls take ref_ptr when they're going to implicitly cast it there anyway, but I do see your point with .get() being a convenience to those of us who know how to use it properly. Speaking of which, good points were made by Paul Speed (sorry, had my sub set to digest..). I can see how it would be impossible to handle every possible result of not having access to the raw pointer through .get(). My issue was really with the library encouraging .get() to be used, not with it being available. On a general note, I tend to use ref_ptr when they are required, and C* pointers elsewhere, I choose ref_ptr when I want robust and easy memory management, I use C pointers where no particular harm will come from their usage, and performance will be gained (please note passing ref_ptr around introduces thrashing of the renderenceCount() which kills performance if you aren't careful). Mixing code with ref_ptr and C* can be done perfectly safely, but you do need to understand the consequences - ref counting is one of the fundamental concepts that all C++ programmers need to grasp very early in their careers, long before they even come across software like the OSG. Robert. Because of the speed requirements we have, I'll probably be using C pointers with OSG a lot more than I would expect. I guess the idea of using smart pointers and the practice diverge a bit. Some version of good library design would say that if you are going to use ref_ptr, then your library arguments should expect its use. However, C++ brings its own issues to the party. Also, the only way to be sure it is always safe to pass a C pointer to the library functions is to provide a version that takes a C pointer. I see how this could become an issue where someone says, look, we're just going to expect you to use safe coding practices and picks a version for the library. It goes back to the quote: The difference between theory and practice is that in theory, there is no difference between theory and practice, but in practice, there is. -- (Unknown author) Thanks for the fast feedback, guys :-) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Reference frame
Thanks. I didn't really think I went into any great deoth on ABSOLUTE versus RELATIVE, though. -Paul _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Elbers, H.P. Sent: Wednesday, September 10, 2008 1:24 AM To: OpenSceneGraph Users Subject: Re: [osg-users] Reference frame Hello Sajjad, You can find details on this, and much more good information in OpenSceneGraph Quick Start Guide, chapter : 2.3.3 Go to http://www.skew-matrix.com/OSGQSG/index.html http://www.skew-matrix.com/OSGQSG/index.html, follow the 'lulu.com' link. The guide can be downloaded for free. Paul Martz: thank you *VERY* much for this beautiful guide! Good luck, Hans. _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ami guru Sent: woensdag 10 september 2008 4:59 To: OpenSceneGraph Users Subject: [osg-users] Reference frame Hello Forum, OSG Transform allows to specify its reference frame and by default the reference frame is relative. and the other one is the absolute. And the two are specified by different code identifier. We can view transformation in 2 ways. 1. relative to the fixed coordinate system. 2. Local movable coordinate system. There is no practical difference and just a matter of viewpoint. What is the purpose of OSG to specify them separately as follows: osg::Transform::RELATIVE_RF. Any example would be of great help!!! Regards Sajjad ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Reference frame
What is the purpose of OSG to specify them separately as follows: osg::Transform::RELATIVE_RF. In short, if you don't know whether you want RELATIVE or ABSOLUTE, then you probably want RELATIVE. RELATIVE is for the typical case where you have a Camera node that specifies the view, and other transforms (below the Camera in the scene graph hierarchy) that place objects in the world coordinate system. This is the view and model transforms from which the OpenGL ModelView matrix gets its name. In this case, the model transform nodes need to specify RELATIVE so that OSG will concatenate them with the view matrix from the Camera node. You might also want to use RELATIVE to create some type of robot arm scene graph in which transformations occur relative to each other. This is all fairly basic 3D graphics so I'll recommend you purchase a standard 3D text such as Real Time Rendering or 3D Graphics Principles and Practice; see the recommended reading in the Quick Start Guide. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgal with multiple sounds
I found a solution! In the osgAL multiple sounds example's createSound function, the allocateSource function needs to be called before setPlay instead of after setPlay. The allocateSource funciton is important, since it allocates a hardware soundsource for each sound being added to the scenegraph. Anyway, here is how the fixed code looks in createSound. This is at or near line 386 in osgalmultiple.cpp: osg::ref_ptrosgAL::SoundState sound_state = new osgAL::SoundState(file); sound_state-setSample(sample.get()); sound_state-setGain(1.0f); sound_state-setReferenceDistance(60); sound_state-setRolloffFactor(3); sound_state-allocateSource(10); sound_state-setPlay(true); sound_state-setLooping(true); The two sounds now play simultaneously, as intended. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Returning ref_ptr vs. ref_ptr::get()
What I don't understand is why he doesn't just return grp and let it call the copy ctor. In the example you cited, I could've done as you suggest. But as you and Robert already discussed, this wouldn't work if the return type were a ref_ptr to a base class of Group. I figure there are two types of programmers: those who know C++ and can spin up on things like ref_ptr in a matter if a few minutes just by glancing at the code, and those who aren't so experienced and need some hand holding. To address the needs of the latter group, the section on ref_ptr could have been an entire chapter unto itself. To keep the book short and affordable, I decided to give them a set of short but safe instructions that would keep them out of trouble when using ref_ptrs. Exploring all of ref_ptr's ins and outs is left as an exercise to the reader. (There are, of course, multiple ways to return ref_ptr memory from a function. If I update the book, I'll consider recommending release(), for example.) Thanks for reading the book. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Returning ref_ptr vs. ref_ptr::get()
On Wed, Sep 10, 2008 at 4:35 PM, Paul Martz [EMAIL PROTECTED] wrote: What I don't understand is why he doesn't just return grp and let it call the copy ctor. In the example you cited, I could've done as you suggest. But as you and Robert already discussed, this wouldn't work if the return type were a ref_ptr to a base class of Group. I figure there are two types of programmers: those who know C++ and can spin up on things like ref_ptr in a matter if a few minutes just by glancing at the code, and those who aren't so experienced and need some hand holding. To address the needs of the latter group, the section on ref_ptr could have been an entire chapter unto itself. To keep the book short and affordable, I decided to give them a set of short but safe instructions that would keep them out of trouble when using ref_ptrs. Exploring all of ref_ptr's ins and outs is left as an exercise to the reader. (There are, of course, multiple ways to return ref_ptr memory from a function. If I update the book, I'll consider recommending release(), for example.) Thanks for reading the book. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 Once I picked up on that, I figured out where you are coming from with the book. It's a smart way to write it if you want to keep it short, but now I know to just apply my knowledge of C++ to it and not be afraid that there's something you're not telling us in the book. Or rather, there's a lot you're not telling us, but you are telling us what we need to know. And no, thank YOU for writing it. It's a great introduction to OSG, and it's only around 100 pages long. I'm glad the boss paid for the hardcopy :-) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
