[GRASS-dev] Re: Nviz animation wish

[Helena Mitasova]

Michael - there is a file sequencing tool for that in nviz - I have  
been doing it for years (I also
had some of it at your workshop), just check my website.
My slides for the lausanne workshop should have a description how to  
do it along
with a sample data set. I need to run now but I can write you more  
later.
It may be broken in the latest CVS but it worked well in 6.1

It does not replace xganim - that is a module that is really needed  
when you
are working with time series because it allows to browse through the  
series
of data quickly and animate them and always use to to prepare the series
for nviz animation (check whether they animate smoothly etc.).

Glynn has written a tcltk version of xganim - I still have it my list  
of things to try out
but I did not get to it. so check with him.

Helena

Helena Mitasova
Dept. of Marine, Earth and Atm. Sciences
1125 Jordan Hall, NCSU Box 8208,
Raleigh NC 27695
http://skagit.meas.ncsu.edu/~helena/



On Jan 25, 2007, at 12:53 AM, Michael Barton wrote:

> Bob and Helena
>
> I’m not sure where xganim went, but it no longer compiles by  
> default on  my Mac. It was pretty klunky, but it served a  
> potentially important role that I miss. I wonder if something like  
> it’s functionality could be incorporated into one of the nviz  
> animation modules. That is, currently, the animation modules (or at  
> least the one that works well) let you interpolate to create key- 
> frame animations of different view positions. The result can be  
> like a fly-through or similar display.
>
> It would be nice if you could interpolate to animate a change in  
> surface color maps, or even a change in surface maps. That is, if  
> you could select (as xganim did) a series of color maps and have  
> NVIZ smoothly interpolate through them to simulate such things as  
> vegetation change. Even more interesting (and close to my own  
> heart) would be to select a series of surface maps to interpolate  
> and animate. This could display surface change.
>
> I could do this with normal maps and TclTk in the 2D display, but  
> it might be slow (though maybe a way to get around that by pre- 
> rendering). It would be really neat to do this in NVIZ however.
>
> I looked at the animation code and it looks like it calls a C  
> (Togl?) command: “Ndo_framestep”. Does this command take a color  
> value or just a positional value?
>
> Just musing after attending a 3-day workshop on modeling.
>
> Michael
> __________________________________________
> Michael Barton, Professor of Anthropology
> School of Human Evolution & Social Change
> Center for Social Dynamics & Complexity
> Arizona State University
>
> phone: 480-965-6213
> fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton
>