Re: [osg-users] Usage of the command line of osgTerrain
Hi Ting, On Fri, Jul 16, 2010 at 2:16 AM, ting zhang bee...@sina.com wrote: Do you know what kind of technique is used in the runtime generation. I analysed osgTerrain, unfortunately, I cannot find any runtime generation techniques of terrains in osgTerrain, am I right? There is only one technique available in osgTerrain right now - the osgTerrain::GeometryTechnique which is a brute force tessellation of the tiles, where a regular grid is generated, and only very simple down sampling is provided in the form of a coarser regular grid. The design of osgTerrain is that it allows you to provide your own custom TerrainTechnique so you can implement any tessellation approach you want. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Usage of the command line of osgTerrain
Hi, Robert Thank you very much. Since osgTerrain is both used in VPB and osgEarth, is it related with the runtime generation of terrains? I used osgEarth, I found that the runtime generation of terrains in osgEarth is excellent. When I viewed a new detailed scene, the scene came to me quickly like googleEarth. This is what I meant real-time generation before, actually it's runtime generation, quite unlike the pre-generation of terrains in VPB. Do you know what kind of technique is used in the runtime generation. I analysed osgTerrain, unfortunately, I cannot find any runtime generation techniques of terrains in osgTerrain, am I right? ... Thank you! Cheers, ting -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30054#30054 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Usage of the command line of osgTerrain
Hi Ting, On Tue, Jul 6, 2010 at 10:37 PM, ting zhang bee...@sina.com wrote: Thank you very much. But I heard that the osgTerrain OSG example in osg 2.8.0 or even higher version has some features about the real-time generation of terrains. Is this true or not? thank you again. It all depends upon what you mean by real-time generation of terrains as this is so open ended it could mean many different things. osgTerrain builds it's geometry and state it uses for rendering from height fields and imagery, this is all done automatically for you. You can also control various parameters like sample density and vertical exaggeration at runtime via the osgTerrain::Terrain control node. osgTerrain also works well with paged databases, either ones that are created offline by the likes of VirtualPlanetBuilder, or on the fly by 3rd party NodeKits like osgEarth. Whether this answers your question I have no idea. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Usage of the command line of osgTerrain
Hi Ting, The old osgterrain example was written for testing purposes of niche features rather than an educational example, so unfortunately isn't a great place to lean how to use osgterrain as it's way too complicated. Both VirtualPlanetBuilder and osgEarth build osgTerrain based databases so these might be a good place to look for another reference on how to build osgTerrain databases. Robert. On Mon, Jul 5, 2010 at 10:39 PM, ting zhang bee...@sina.com wrote: Hi, I am learning osgTerrain recently. But I am confused about the command line of osgTerrain OSG examples. Would someone kindly provide me a example of the usage of the command line of osgTerrain. Thank you. ... Thank you! Cheers, ting -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=29706#29706 ___ 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] Usage of the command line of osgTerrain
Hi, Thank you very much. But I heard that the osgTerrain OSG example in osg 2.8.0 or even higher version has some features about the real-time generation of terrains. Is this true or not? thank you again. ... Thank you! Cheers, ting -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=29756#29756 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Usage of the command line of osgTerrain
Hi, I am learning osgTerrain recently. But I am confused about the command line of osgTerrain OSG examples. Would someone kindly provide me a example of the usage of the command line of osgTerrain. Thank you. ... Thank you! Cheers, ting -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=29706#29706 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
