Since this is a vector, it may be related to an issue that I was reminded of last night.
If you display the wake streets vector map on top of elevation (nc_spm_08 demo data) in NVIZ, some of the streets display blue regardless of how you set the vector color. That is, some vector parts have a color display by "default" in spite of vector color settings that affect the rest of the vector object. Michael ______________________________ C. Michael Barton Director, Center for Social Dynamics & Complexity Professor of Anthropology, School of Human Evolution & Social Change Arizona State University Tempe, AZ 85287-2402 USA voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC) fax: 480-965-7671(SHESC), 480-727-0709 (CSDC) www: http://csdc.asu.edu, http://shesc.asu.edu http://www.public.asu.edu/~cmbarton On Feb 14, 2013, at 11:55 AM, <[email protected]<mailto:[email protected]>> wrote: From: Anna Kratochvílová <[email protected]<mailto:[email protected]>> Subject: Re: [GRASS-user] NViz - problem in the visualization of 3D objects Date: February 14, 2013 11:15:28 AM MST To: Carla Rebelo <[email protected]<mailto:[email protected]>> Cc: <[email protected]<mailto:[email protected]>>, GRASS-dev <[email protected]<mailto:[email protected]>> On Thu, Feb 14, 2013 at 6:30 PM, Carla Rebelo <[email protected]<mailto:[email protected]>> wrote: Hi, I have footprint buildings and the height value (type double precision) of each footprint. v.info -t map=buildings@ nodes=250 points=0 lines=0 boundaries=243 centroids=88 areas=89 islands=8 faces=0 kernels=0 primitives=331 map3d=1 After the v.extrude step "v.extrude --overwrite --verbose input=buldings@ output=buildings3D hcolumn=Height type=area v.info -t map=buildings3D@ nodes=646 points=0 lines=0 boundaries=0 centroids=0 areas=0 islands=0 faces=743 kernels=88 primitives=831 map3d=1 When I visualized the file 3D from NViz, I have seen some of the buildings with a black filling (it's black inside or the top of building is black) .... Is it a problem of rendering? Or a problem with the topology? Some of the buildings look ok? I've just tried a small example and it works for me . There could be a problem with the normal vectors of the faces. Unfortunately I don't know much about the topology of kernels. Regards, Anna
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