AW: [GRASS-user] Problem with digitization and NVIZ

[Sramkova, Anna]

Hi,

thank you, using vector instead of a raster actually helped in both cases :-)

As for the visualization, I get the same problem on a Debian laptop (no
VirtualBox)...seems to me something more fundamental is the problem.
Is there a special format for elevation map or something? The 
vectorized map is displayed with no problems.

I will try what you suggested for 2), though, and see.

Cheers

Anna
________________________________________
Von: Maris Nartiss [maris.gis at gmail.com]
Gesendet: Donnerstag, 22. April 2010 18:54
An: Sramkova, Anna
Betreff: Re: [GRASS-user] Problem with digitization and NVIZ

Hello,
1) if You want to digitize something, create a vector and then convert
to raster with v.to.rast. It will be alot easier than understand how
to work with r.digit. r.digit also is too outdated to fix it just for
fun in 6.x releases, as it doesn't support existing raster editing,
just creation.

2) I'm not certan how stable/well implemented is OpenGL support in
VirtualBox. Does other OpenGL applications work fine? Try to disable
3D acceleration in VirtualBox and use software renderer - it should
work but slow.
Also You could try to play around with:
  export GRASS_NO_GLX_PIXMAPS=TRUE
  export GRASS_NO_GLX_PBUFFERS=TRUE


Maris.

2010/4/22, Sramkova, Anna <anna.sramkova at iee.unibe.ch>:
> Hi,
>
> I'm working on spatial modeling in population genomics and I'd like to use
> GRASS for processing & displaying of the world map (in attachment).
> Unfortunately, I have been unable to accomplish two out of the three things
> I would like to do:
>
> 1. (this one I mentioned in an earlier email, but have not gotten an answer
> yet)
> I would like to use the digitizing tool to define regions (represented by
> different numbers) on the map. However,
> when I choose a layer and then click the digitizing button in GUI, the
> monitor that opens is blank. (I am able
> to edit the blank map and save the shapes I draw. )
>
> 2. I would like to display several 3D points over a flat map of the world
> (the elevation of each point represents the
> result of an analysis starting at the particular (x,y) coordinates). For
> this purpose, I tried converting the raster map into
> a 3d raster with r.to.rast3d (worked) and then displaying it with NVIZ.
> Again, I get a blank screen, even though the map
> was loaded. I can also load the 3d points, but nothing is displayed again.
> Sometimes, I get the following error:
>
> "OpenGL Warning: No pincher, please call crStateSetCurrentPointers() in your
> SPU"
>
> I was able to display the example Spearfish data (elevation + rivers+roads),
> though.
>
> Can you tell me where I'm doing a mistake?
>
> Cheers, Anna
>
> p.s. I'm using Debian Linux on a VirtualBox in Windows 7.
>