Re: [osg-users] osgTerrain::TerrainTile question
Hey Brian, I found the old post you were takling about. I copied it below. But where is the link to the code? Best regards, Nicolas Duval [osg-users] Paged Terrain Question *Brian R Hill* bhill22 at csc.com osg-users%40lists.openscenegraph.org?Subject=%5Bosg-users%5D%20Paged%20Terrain%20QuestionIn-Reply-To=20071219225056.76D7867830%40mail.frii.com *Wed Dec 19 15:19:07 PST 2007* - Previous message: [osg-users] Paged Terrain Question http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/005631.html - Next message: [osg-users] How can I use glHint() in OSG 1.2? http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/005635.html - *Messages sorted by:* [ date ]http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/date.html#5634 [ thread ]http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/thread.html#5634 [ subject ]http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/subject.html#5634 [ author ]http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/author.html#5634 -- Here's some code I hacked together. I tested it some, but . YMMV. Brian -osg-users-bounces at lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org wrote: - To: 'OpenSceneGraph Users' osg-users at lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org From: Paul Martz pmartz at skew-matrix.com http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Sent by: osg-users-bounces at lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Date: 12/19/2007 05:51PM Subject: Re: [osg-users] Paged Terrain Question This is a good solution. Perhaps a possible new feature for the existing OpenFlight importer would be an Option to use PagedLOD nodes for external references (and not load the external model), rather than ProxyNodes (and loading the model). -Paul * The process I use: - copy master.flt to another directory (hopefully the file** references aren't absolute paths)** - use osgDB:readNodeFile to read the copied master.flt. This** places osg::ProxyNodes in place of the actual .flt reference** files (because it can't find the referenced files)** - write a custom NodeVisitor to convert the osg::ProxyNodes** to osg::PagedLODs** - at the same time I convert the referenced .flts to .ives** and use their bounds to set the osg::PagedLODs center and radius.** - save the master.flt as master.ive (or master.osg) Brian -osg-users-bounces at lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org wrote: -** To: osg-users at lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org** From: paul.tanja at internode.on.net http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org** paul.tanja at internode.on.net http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Sent by:** osg-users-bounces at lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org** Date: 12/19/2007 05:00PM** Subject: [osg-users] Paged Terrain Question Hi, Im new to osg and I have an Openflight database, it has a** master.flt and would like to use osg to page it in rather** than loading all in memory at once . I'm not sure if** osgviewer is doing this already? or wether I should use** osgpagedLOD example to load in my database - if so how? Also down the track I would like to know which tiles are** being loaded in and which tiles are being loaded out. Where** would I be able to find the relevant point in the source code?* 2008/9/10, Coco [EMAIL PROTECTED]: 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
Re: [osg-users] osgTerrain::TerrainTile question
If you go here: http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-December/005634.html The link is near the bottom: http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20071219/eaa1ef2c/attachment.obj Brian Date: Thu, 11 Sep 2008 11:13:20 +0200 From: [EMAIL PROTECTED] To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] osgTerrain::TerrainTile question Hey Brian, I found the old post you were takling about. I copied it below. But where is the link to the code? Best regards, Nicolas Duval [osg-users] Paged Terrain QuestionBrian R Hill bhill22 at csc.com Wed Dec 19 15:19:07 PST 2007 Previous message: [osg-users] Paged Terrain Question Next message: [osg-users] How can I use glHint() in OSG 1.2? Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Here's some code I hacked together. I tested it some, but . YMMV. Brian -osg-users-bounces at lists.openscenegraph.org wrote: - To: 'OpenSceneGraph Users' osg-users at lists.openscenegraph.org From: Paul Martz pmartz at skew-matrix.com Sent by: osg-users-bounces at lists.openscenegraph.org Date: 12/19/2007 05:51PM Subject: Re: [osg-users] Paged Terrain Question This is a good solution. Perhaps a possible new feature for the existing OpenFlight importer would be an Option to use PagedLOD nodes for external references (and not load the external model), rather than ProxyNodes (and loading the model). -Paul The process I use: - copy master.flt to another directory (hopefully the file references aren't absolute paths) - use osgDB:readNodeFile to read the copied master.flt. This places osg::ProxyNodes in place of the actual .flt reference files (because it can't find the referenced files) - write a custom NodeVisitor to convert the osg::ProxyNodes to osg::PagedLODs - at the same time I convert the referenced .flts to .ives and use their bounds to set the osg::PagedLODs center and radius. - save the master.flt as master.ive (or master.osg) Brian -osg-users-bounces at lists.openscenegraph.org wrote: - To: osg-users at lists.openscenegraph.org From: paul.tanja at internode.on.net paul.tanja at internode.on.net Sent by: osg-users-bounces at lists.openscenegraph.org Date: 12/19/2007 05:00PM Subject: [osg-users] Paged Terrain Question Hi, Im new to osg and I have an Openflight database, it has a master.flt and would like to use osg to page it in rather than loading all in memory at once . I'm not sure if osgviewer is doing this already? or wether I should use osgpagedLOD example to load in my database - if so how? Also down the track I would like to know which tiles are being loaded in and which tiles are being loaded out. Where would I be able to find the relevant point in the source code? 2008/9/10, Coco [EMAIL PROTECTED]: 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
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] 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] 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
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] 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] 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 http://lists.openscenegraph.org/listinfo.cgi/osg-users
Re: [osg-users] osgTerrain::TerrainTile question
Are you perhaps referring to paged LevelOfDetail (LOD) terrain? OSG database pager automatically processes these types of paged LOD terrains, and loads higher resolution tiles as you zoom in (or the opposite: lower reslution when zooming out). request your application to load your master.ive file of your pagedLOD terrain, and that is all. I hope this might be relevant to you, however, I don't know much about osgTerrain, so I'd advise you to wait for someone to come along with a better answer on osgTerrain. good luck, -J On Tue, September 9, 2008 1:30 pm, Coco 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
