HI Scott, The max tile sizes is in number of pixels/height field cells, neither are in meters.
Robert. On Thu, Mar 27, 2008 at 1:19 PM, Hulet, Scott S <[EMAIL PROTECTED]> wrote: > > Robert, > > Note that --tile-image-size was set to 1024, not 111120. I > basically guessed that --tile-image-size was in texel units and > --tile-terrain-size was in meter units. > > With --tile-image-size 1024, I was attempting to get osgdem to > use larger image tile dimensions; i.e. 1024x1024 instead of 64x64 (to > improve performance). I attempted to convert some of my .ive files to > .osg files to determine what image tile sizes osgdem was using as > default (at each level), but I only see a reference to a .dds texture > for the children tiles (because .dds files are baked into .ive files). > I could not determine the dimension of the images. Based on the .ive > file sizes, however, it appears that osgdem is using fairly small image > tile dimensions at the finer levels. Is there a way to determine what > image tile dimensions are used at each level? Our experience has been > that larger image textures perform better on modern graphics cards. > What is the correct way to drive osgdem to use a larger size? > > With --tile-terrain-size 111120, I was attempting to drive the > coarsest terrain tile to 1 large terrain region (111120 meters in a > geocell). It actually did have an effect that was close to what I > desired. The output was 4x4 facet pairs (32 tris) for the whole geocell > at the coarsest level. Basically, > > So, could you provide some info on the following options? What > are the units? What is the default behavior? I also understand that > terrain region size is tightly coupled to image tile dimension size. Is > this a case where you set one or the other, but not both? > > --tile-image-size Set the tile maximum image size > --tile-terrain-size Set the tile maximum terrain size > > > > HI Scott, > > > > The sizes of --tile-image-size is absolutely massive, a normal figure > > would be something like 32 or 64, not 111120. The --tile-*-size > > parameters controls the dimensions of the tiles, you certainly don't > > want a 1111120x1111120 grid size. > > > > Is there something in particular you are tyring to do with this high > figures? > > > > Robert. > > > > -----Original Message----- > From: Hulet, Scott S > Sent: Wednesday, March 26, 2008 8:45 PM > To: '[email protected]' > Cc: Hulet, Scott S > Subject: (VPB) osgdem not providing terrain heights with > --tile-terrain-size --tile-image-size options > > Robert, > > When I generate with the --tile-terrain-size --tile-image-size > options, I do not get any terrain relief in my output .ive files. All > of the levels and triangles (mesh) are present, but all polys are in a > flat plane. When I do not use these options, all is well (with the > exact same input source; imagery and dem). I am using OSG 2.35 and VPB > 0.9.6. Note that I am using the --terrain option in both cases. > > I have provided the command lines that I am using. Excuse the > syntax - I'm batching osgdem with a Python system call. > > NO TERRAIN RELIEF > ----------------- > osgdem cmd line: os.system("\"c:/Program > Files/VIRTUALPLANETBUILDER/bin/osgdem\" --PagedLOD --geocentric > --mip-mapping-imagery--compressed --terrain --tile-terrain-size 111120 > --tile-image-size 1024 -e " + sw_lon + ' ' + sw_lat + " 1.00 1.00 -t > c:/data/scratch/osg_mt_home/imagery/" + geocell + "/tifs -d > c:/data/scratch/osg_mt_home/dted/" + geocell + " -o " + ive_out) > > EXPECTED TERRAIN RELIEF > ----------------------- > osgdem cmd line: os.system("\"c:/Program > Files/VIRTUALPLANETBUILDER/bin/osgdem\" --PagedLOD --geocentric > --mip-mapping-hardware --compressed --terrain -e " + sw_lon + ' ' + > sw_lat + " 1.00 1.00 -t c:/data/scratch/osg_mt_home/imagery/" + geocell > + "/tifs -d c:/data/scratch/osg_mt_home/dted/" + geocell + " -o " + > ive_out) > > Thanks! > > Scott S. Hulet > Simulation Training and Support > > "They never forget who they're dying for..." > "We can never forget who we're working for..." > > Lockheed Martin Corp - STS Akron > 1210 Massillon Road > Mailpoint C2E, AB-33 > Akron, OH 44315-0001 > > Phone Numbers: 330.796.6616 (Desk) > 330.796.1059 (Lab) > 330.242.2385 (Cell) > > Fax: 330.796.4050 > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
