Hi,
Sorry for my ignorance, but I cannot see anything even if I added
three isosurfaces:
Current: precip3d.500z50@PERMANENT
Visualization Type: isosurfaces
Shading: Gouraud
level: 700 Use volume as color transparency 100
level: 1000 Use volume as color transparency 100
level: 1300 Use volume as color no transparency
and clicked "Draw Current". Does 600-1300 mean threshold?
Thank you.
Huidae Cho
On Thu, Dec 02, 2004 at 12:56:45PM -0500, Helena Mitasova wrote:
New data set for testing the GRASS5.7 volume support has been added
to the GRASS Sample datasets (http://grass.itc.it/data.html):
it includes Slovakia DEM and Precipitation data.
You can get it directly from here:
http://mpa.itc.it/grasstutor/data_menu2nd.phtml
See sample visualization here http://grass.itc.it/grid3d/index.html
(images on the top of the page)
The volume visualization still needs some "tuning"
so below are some hints how to make the images.
Let us know if there are any serious problems
(but read the below hints before complaining that you don't see
anything)
Helena
-----------------------------------------------------------
Quick tour:
The map 'dem500' is used for a DEM.
There is a 3D file 'precip3d.500z50' that can be used
for isosurfaces and cross-sections.
nviz el=dem500
Then load the volume (Panel -> Volume -> New).
To see the isosurfaces use values between 600 and 1300
(e.g. 700 and 1000 with transparency of approx. 100 and
a third isosurface 1300 with no transparency).
Set the polygon resolution to 3 or less (note that for
resolution 1 you may need to wait a little depending on your
machine's speed) to render the volume._______________________________________________
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