Re: [osg-users] Annotating large numbers of objects
In the end I rendered all 255 characters of my chosen annotation font/style/size into 255 gl bitmaps, then use glBitMap to draw strings on the fly composing them from the character bitmaps -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=14257#14257 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Annotating large numbers of objects
Hi Andrew, On Mon, Jun 15, 2009 at 05:20:15PM +, Andrew Cunningham wrote: Any suggestions from those who have been there before?? I had exactly the same problem. I created a texture for each annotation and mapped each texture on a quad. Good enough for my use case. Greetings, Daniel -- Daniel Trstenjak Tel : +49 (0)7071-9457-264 science + computing ag FAX : +49 (0)7071-9457-511 Hagellocher Weg 73 mailto: daniel.trsten...@science-computing.de D-72070 Tübingen WWW : http://www.science-computing.de/ -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Annotating large numbers of objects
Hi, I need to label or annotate large numbers of 3D locations with a short label like a number. Think possibly 100,000+ locations or nodes (for example, represented as small cubes). I naively used osg::Text to create labels and ended up consuming 100's of MB of memory. This seems like a case where I should perhaps derive my own drawable (or geode?) perhaps and draw things 'on the fly' rather than creating huge numbers of objects. The old trade-off of memory vs speed of drawing. Any suggestions from those who have been there before?? Thanks Andrew -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13991#13991 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Annotating large numbers of objects
Andrew Cunningham wrote: Hi, I need to label or annotate large numbers of 3D locations with a short label like a number. Think possibly 100,000+ locations or nodes (for example, represented as small cubes). I naively used osg::Text to create labels and ended up consuming 100's of MB of memory. This seems like a case where I should perhaps derive my own drawable (or geode?) perhaps and draw things 'on the fly' rather than creating huge numbers of objects. The old trade-off of memory vs speed of drawing. Any suggestions from those who have been there before?? I think a GLSL shader could do this on-the-fly efficiently. I think there's an example of such a text shader in The Orange Book. Thanks Andrew -- Chris 'Xenon' Hanson, omo sanza lettere Xenon AlphaPixel.com PixelSense Landsat processing now available! http://www.alphapixel.com/demos/ There is no Truth. There is only Perception. To Perceive is to Exist. - Xen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Annotating large numbers of objects
Hi Chris, Thanks for the suggestion - I am backed into a corner a bit by the need to support access via Windows RDC ( remote desktop connection) which works quite well for small/medium models but only supports basic OpenGL(1.1?) without shaders. Of course I can test for that and use an alternative approach. Andrew -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13993#13993 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
