Re: [osg-users] strange normal with VPB
Hi Christophe, Is the normal discontinuity only apparent along one longitudinal split? What happens when you zoom in? I presume the normal discontinuity is along the boundary where the longitude goes from -180 to 180. The is code to equalize normals across boundaries between tiles, but don't remember any code that wraps around the the equalization so this might well be the source of the issue. As for fixing it, well you all have the source code... to me this is rather a minor issue in the greater scheme of things. When viewing the texture model a small discontinuity in the normal is hardly noticeable. Robert. On Fri, Feb 22, 2008 at 3:13 PM, christophe loustaunau [EMAIL PROTECTED] wrote: Hi all, I have notice that when I generate an earth with osgdem there is some problems with the normals. I have used this command line : osgdem --bluemarble-west -t ../land_shallow_topo_west.tif --bluemarble-east -t ../land_shallow_topo_east.tif --geocentric -l 12 -o earth.ive I have join to the mail, a screenShot of the first level, showing the normals. You can see that there is a problem of normals at the join. I would like to know If Robert has plan to correct this, or is this intend ? Thanks ! -- Christophe Loustaunau. ___ 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] strange normal with VPB
Is the normal discontinuity only apparent along one longitudinal split? yes, in fact the normal discontinuity only appears at the join of the tile. See the screenshot I have attached you will understand. What happens when you zoom in? I presume the normal discontinuity is along the boundary where the longitude goes from -180 to 180. The is code to equalize normals across boundaries between tiles, but don't remember any code that wraps around the the equalization so this might well be the source of the issue. Thanks for the explanation. As for fixing it, well you all have the source code... to me this is rather a minor issue in the greater scheme of things. When viewing the texture model a small discontinuity in the normal is hardly noticeable. Robert. I will look at the code and try to fix this. Thanks. On Fri, Feb 22, 2008 at 3:13 PM, christophe loustaunau [EMAIL PROTECTED] wrote: Hi all, I have notice that when I generate an earth with osgdem there is some problems with the normals. I have used this command line : osgdem --bluemarble-west -t ../land_shallow_topo_west.tif --bluemarble-east -t ../land_shallow_topo_east.tif --geocentric -l 12 -o earth.ive I have join to the mail, a screenShot of the first level, showing the normals. You can see that there is a problem of normals at the join. I would like to know If Robert has plan to correct this, or is this intend ? Thanks ! -- Christophe Loustaunau. ___ 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 -- Christophe Loustaunau. attachment: img.jpeg___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
