Re: [osg-users] osgEarth fading effect?
Robert, I set our terrain as input (output.ive) to the same osgmultitexturecontrol example. It is returning false from the function where node to the type of multitexturecontrol is searched from our terrain i.e.,dynamic_cast to multitexturecontrol is failing. Expected elevation blending/fading layers is not happening. Pls let me understand the problem. Akilan. A -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=27057#27057 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
Hi akilan, May we have got our wires crossed. You can create osgTerrain with more than one texturelayer. As default layer 0 is shown. You can blend to an of the other texture layers with the multi texture control. If I read your problem, I wonder If you are talking about fading to differenz LODs. Assume you fly 4 feet above ground, and then you dive near ground, so your tiles will be replaced by higher resolution tiles. Usually the tiles pop in. Sometimes this is clear visible, if distant enough it is hardly visible. Do you want to replace this LOD popping by fading to ney LOD? Thank you! Cheers, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=27060#27060 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
Hi zonk, To say straghtly, same region has been constituted by multi resolution tiles. The transition from coarser to better resolution tile will take place based on the height we are. As u said, exactly I like to know about the LOD popping by fadding only. Akilan. A -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=27064#27064 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
Hi Akilan, thank you, than your question is my question too :) My thoughts: I don't know if osg already provides a fading node to fade in/out the subsequent scenegraph. If not, maybe you should develop one. This node could be used in your osgTerrain to introduce fading in the LOD mechanism. Thank you! Cheers, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=27065#27065 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
HI Akilan, Have a look at the osgmultitexturecontrol example as it does exactly what you are looking for. Robert. On Fri, Apr 16, 2010 at 6:12 AM, Akilan Thangamani akilan.thangam...@gmail.com wrote: Hi robert true. My imagery tiles have been constructed as layers such a way coarser resolution images lies at the top and higher resolution images at bottom.When my scene is zoomed-in, I like to have the appearance of higher resolution tiles like fading-in. Is that possible by changing alpha values of the tiles? Akilan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26887#26887 ___ 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] osgEarth fading effect?
Hi robert true. My imagery tiles have been constructed as layers such a way coarser resolution images lies at the top and higher resolution images at bottom.When my scene is zoomed-in, I like to have the appearance of higher resolution tiles like fading-in. Is that possible by changing alpha values of the tiles? Akilan. A -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26886#26886 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
Hi robert true. My imagery tiles have been constructed as layers such a way coarser resolution images lies at the top and higher resolution images at bottom.When my scene is zoomed-in, I like to have the appearance of higher resolution tiles like fading-in. Is that possible by changing alpha values of the tiles? Akilan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26887#26887 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
akilan wrote: Hi robert true. My imagery tiles have been constructed as layers such a way coarser resolution images lies at the top and higher resolution images at bottom.When my scene is zoomed-in, I like to have the appearance of higher resolution tiles like fading-in. Is that possible by changing alpha values of the tiles? Extremely sorry. Unknowingly new thread created for this. The same querry added with existing thread Akilan. A -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26888#26888 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgEarth fading effect?
Hi, Similar to osgEarth which provides to set fading effect to the terrain tiles, could it be is possible to get the same effect directly from osg alone and how? Bcoz, to exploit that feature from osgEarth, it puts some constraints like the terrainDB should be generated with --terrain options and some other split level specifications. By passing all those constraints I wud like to see thru my terrainDB with the fading effect. I hope dat dis s not just to do with pagedLOD. Thanks -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26753#26753 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
Hi Akilan, When you say fading effect do you simply mean that you want to change the alpha value of the terrain so that it becomes transparent? Robert. On Wed, Apr 14, 2010 at 8:12 AM, Akilan Thangamani akilan.thangam...@gmail.com wrote: Hi, Similar to osgEarth which provides to set fading effect to the terrain tiles, could it be is possible to get the same effect directly from osg alone and how? Bcoz, to exploit that feature from osgEarth, it puts some constraints like the terrainDB should be generated with --terrain options and some other split level specifications. By passing all those constraints I wud like to see thru my terrainDB with the fading effect. I hope dat dis s not just to do with pagedLOD. Thanks -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26753#26753 ___ 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] osgEarth fading effect?
Hi, I think he intends fading out tiles (via alpha) which are replaced by tiles with higher or lower LOD. Is there any predefined method? Would be nice to test, especially regarding performance :) Cheers, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26758#26758 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgEarth fading effect?
Hi Akilan, If you're talking about the FadeLayerNode in osgEarth it's basically just doing a shader that blends multiple texture units together. The osgFX::MultiTextureControl does something similar without using shaders is so that we could support fading along with imagery that contains an alpha channel. You should be able to use the shaders for the most part and apply them to a regular VPB model. Jason On Wed, Apr 14, 2010 at 5:23 AM, Torben Dannhauer z...@saguaro-fight-club.de wrote: Hi, I think he intends fading out tiles (via alpha) which are replaced by tiles with higher or lower LOD. Is there any predefined method? Would be nice to test, especially regarding performance :) Cheers, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26758#26758 ___ 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
