i can visualize islands on osgocean this is exactly what i want but cant visualize my own islands how to generate islands for fitting in osgOcean or how to chnage osgOcean to fit my own dem generated using osgdem which is an ive file
On Thu, Feb 9, 2012 at 5:59 PM, Mohammed Rashad <[email protected]>wrote: > fixed the issue by skipping setlocale VTBuilder/App.cpp 80 > > > On Thu, Feb 9, 2012 at 5:45 PM, Sergey Kurdakov <[email protected]>wrote: > >> Hi >> >> I would suggest, that you compile http://code.google.com/p/vtp/ there >> you will see, how to >> lay roads ( they are similar to rivers, just consist of straight >> segments, and rivers from curved segments), >> >> if you use http://qt.nokia.com/products/developer-tools/ you would be >> able to visually set breakpoints >> and see, how roads are laid onto terrain. >> >> also - the project http://osgearth.org/ has code to combine different >> layers. >> >> the other one which might be of interest is >> http://www.osgvisual.org/projects/osgvisual/ >> >> so it is only by debugging someones code you would get idea, >> >> there is also FlightGear simulator which is built using osg - it also >> has rivers etc. You may ask where rivers are laid in code in FlightGear dev >> list.. >> >> you may also take a look at delta3d http://www.delta3d.org >> though old, this page seems appropriate >> http://www.delta3d.org/article.php?story=20051013142113452 >> >> it is not that easy, still, from my experience - looking for familiar >> words like road in code it is possible to set breakpoint or watchpoint ( >> that the variable changed somewhere ) and then figure out what happens. >> >> Also I would suggest to search for osg books ( they are available on the >> internet in pdf format ) from that books you would get a strong foundation >> to move forward. >> >> Best regards >> Sergey >> >> >> On Thu, Feb 9, 2012 at 3:27 PM, Mohammed Rashad < >> [email protected]> wrote: >> >>> Thanks Sergery. But I am a newbie to this OSG,OpenGL and 3D. But I am >>> going to do my phd related to virtual reality which I think will help to >>> contribute to OSG and entire community because I am on the open source >>> coding part. I do C++ well. >>> >>> So If you have some free time with you. can you tell me a detailed step >>> for visualizing water over dem. >>> >>> The mail you posted before may be a detailed step but not for a beginner >>> like me. >>> >>> Thanks in advance >>> >>> On Thu, Feb 9, 2012 at 4:23 AM, Sergey Kurdakov >>> <[email protected]>wrote: >>> >>>> Hi Rashad, >>>> >>>> in case you did not get reply from osgRiver author - few spare thoughts >>>> ( do not expect too much, just some ideas), >>>> >>>> I think, that the approach to render rivers over dem is many step task. >>>> >>>> 1) st you decide where river would be in 2D >>>> 2) nd compute intersections along river boundaries ( with some >>>> interval step ), and compute heigh of >>>> river ( river would be represented as a set of patches ) if it >>>> approximates those points ( the rivers could change it's height see code >>>> and first pdf I sent ) >>>> >>>> 3) if the error between terrain and river is big you should re >>>> tesselate the whole thing with new points >>>> >>>> basically you should change you dem so that river was below highest >>>> points along the 2D path ( when seen from above). >>>> >>>> how to re tesselate? >>>> >>>> I think, that it is possible to use http://gts.sourceforge.net/though >>>> tessellating square grid is trivial, then >>>> you can move internal points to height which are better suite your >>>> needs. >>>> then you can join your more tesselated patches with whole dem as >>>> described in http://hal.inria.fr/docs/00/41/62/21/PDF/eusipco09_3_1.pdf >>>> >>>> if still it gives too much error you might then develop a custom >>>> terrain using >>>> http://tetgen.berlios.de/ ( http://tetgen.berlios.de/features.html#F3) >>>> >>>> so that you place a lot of pixels on your terrain ( you might heigh >>>> test for heights between dem grid ) >>>> and also put desired height for river, then run tetgen over it to get >>>> new mesh, with this mesh placing river would be just rendering river >>>> patches after mesh is rendered. >>>> >>>> >>>> you might try to search for some code which performs similar operations >>>> ( maybe http://geodynamics.org/ ?) >>>> >>>> >>>> also take a look at http://code.google.com/p/vtp/ it is virtual >>>> terrain project, based on OpenSceneGraph, >>>> it should have some utilities to work with DEM. >>>> >>>> also see >>>> http://www.ruraltech.org/pubs/theses/mouton/mouton_ms_thesis.pdf >>>> http://www.geocarto.com.hk/cgi-bin/pages1/mar06/3_Maathuis.pdf >>>> >>>> >>>> >>>> Best regards >>>> Sergey >>>> >>>> >>>> On Tue, Feb 7, 2012 at 5:56 PM, Mohammed Rashad < >>>> [email protected]> wrote: >>>> >>>>> thanks. will put a mail to him >>>>> >>>>> >>>>> On Tue, Feb 7, 2012 at 7:19 PM, Sergey Kurdakov < >>>>> [email protected]> wrote: >>>>> >>>>>> Hi >>>>>> >>>>>> try to contact initial author >>>>>> >>>>>> Quintijn Hendrickx [email protected] >>>>>> >>>>>> not sure is he still available by this address, but I just sent you >>>>>> code ( and know it was applied to terrains ) >>>>>> but cannot assist with anything else. >>>>>> >>>>>> Regards >>>>>> Sergey >>>>>> >>>>>> >>>>>> On Tue, Feb 7, 2012 at 5:42 PM, Mohammed Rashad < >>>>>> [email protected]> wrote: >>>>>> >>>>>>> i had done creating cmake for osgRiver with some fixes for linux. >>>>>>> i need to know how to run osgRiver on terrain data >>>>>>> >>>>>>> >>>>>>> On Sat, Feb 4, 2012 at 3:02 PM, Sergey Kurdakov < >>>>>>> [email protected]> wrote: >>>>>>> >>>>>>>> Hi >>>>>>>> >>>>>>>> cmake files were absent from initial download, >>>>>>>> but I think you could take osgOcean cmake files and edit them to >>>>>>>> fit osgRiver. >>>>>>>> >>>>>>>> Regards >>>>>>>> Sergey >>>>>>>> >>>>>>>> >>>>>>>> On Sat, Feb 4, 2012 at 10:12 AM, Mohammed Rashad < >>>>>>>> [email protected]> wrote: >>>>>>>> >>>>>>>>> do you have some cmake files . I am using ubuntu linux >>>>>>>>> >>>>>>>>> >>>>>>>>> On Fri, Feb 3, 2012 at 7:43 PM, Mohammed Rashad < >>>>>>>>> [email protected]> wrote: >>>>>>>>> >>>>>>>>>> thanks indeed Sergery. Will defenitely look into it and get back >>>>>>>>>> to you. >>>>>>>>>> >>>>>>>>>> Thanks again >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Fri, Feb 3, 2012 at 7:32 PM, Sergey Kurdakov < >>>>>>>>>> [email protected]> wrote: >>>>>>>>>> >>>>>>>>>>> final part 3 of osgRiver >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On Fri, Feb 3, 2012 at 6:02 PM, Sergey Kurdakov < >>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>> >>>>>>>>>>>> part 2 of osgRiver >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> On Fri, Feb 3, 2012 at 6:01 PM, Sergey Kurdakov < >>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> Hi, >>>>>>>>>>>>> >>>>>>>>>>>>> see my reply in mailing list, >>>>>>>>>>>>> next three messages will be with attachment of osgRiver >>>>>>>>>>>>> compressed with 7z ( free archiver - take it on the net if you >>>>>>>>>>>>> don't) >>>>>>>>>>>>> >>>>>>>>>>>>> Regards >>>>>>>>>>>>> Sergey >>>>>>>>>>>>> >>>>>>>>>>>>> On Fri, Feb 3, 2012 at 3:32 PM, Mohammed Rashad < >>>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>>> >>>>>>>>>>>>>> All, >>>>>>>>>>>>>> I know my question doesnt have a single line answer. >>>>>>>>>>>>>> But it will be great if somone provides some info or sparks >>>>>>>>>>>>>> for starting >>>>>>>>>>>>>> I have an SRTM data. I created deom using osgdem >>>>>>>>>>>>>> and i got a srtm_12.ive file which I visualized using >>>>>>>>>>>>>> osgviewer and is fine >>>>>>>>>>>>>> Now I want to show that >>>>>>>>>>>>>> How a water flow occurs in DEM >>>>>>>>>>>>>> or srtm_12.ive data >>>>>>>>>>>>>> dem contains some valleys and hills so i need to find a way >>>>>>>>>>>>>> in OSG to display water get accumulated on terrain valleys(no >>>>>>>>>>>>>> realtime >>>>>>>>>>>>>> rendering). >>>>>>>>>>>>>> >>>>>>>>>>>>>> For a given altitude I need to show the coast of dem which is >>>>>>>>>>>>>> filled with water >>>>>>>>>>>>>> >>>>>>>>>>>>>> -- >>>>>>>>>>>>>> Regards, >>>>>>>>>>>>>> Rashad >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> _______________________________________________ >>>>>>>>>>>>>> osg-users mailing list >>>>>>>>>>>>>> [email protected] >>>>>>>>>>>>>> >>>>>>>>>>>>>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> Regards, >>>>>>>>>> Rashad >>>>>>>>>> >>>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> Regards, >>>>>>>>> Rashad >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Regards, >>>>>>> Rashad >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> Regards, >>>>> Rashad >>>>> >>>>> >>>> >>> >>> >>> -- >>> Regards, >>> Rashad >>> >>> >> > > > -- > Regards, > Rashad > > -- Regards, Rashad
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