[GRASS-user] Re: Regarding 2D Simulation Animation in Native
hamish_nospam at yahoo.com
Sun Feb 11 20:45:00 EST 2007
yuri bay wrote:
> I am desparately in need of your help and advice. Previously I have
> started a very good round of discussions by enquiring about the
> Xganim function in native binary WinGRASS. Now I need to focus on
> getting a simulation model running, with some basic animation. My
> objective is to make a point/marker to move from one location to
> another on a path on a street map, i.e. vector animation. I have
> tried Xganim, d.slide.show and d.mon, none can work! My questions
> 1) Can this be done by updating the attribute table and refreshing
> native WinGRASS screen?? How??
> 2) Is there an easy way to do 1)?
The "hardest" part is creating the individual frames. If you can do that
manually and save each to a graphics file*, you can use any number of
graphics encoders to make the animation. (This depends on the number of
frames in your movie of course, for 500 frames it may take a long time
:) You will have to search for an encoder to make the movie, I'm sure
there are many out there for windows. MPEG/AVI movie encoders will
probably take .ppm images, animated GIFs probably require you to convert
individual frames into GIF first.
[*] in the "Map Display" window, click the floppy disk icon "Export
display to a graphics file". Choose the PPM format, name your frames
frame0001.ppm, frame0002.ppm etc.
(there is no save as PNG format??)
> 3) As a contigency plan, can I install a Cygwin winGRASS and use it
> along the native WinGRASS that I already have?
I don't really know, but I'd think so. Try the new 6.2.1 Cygwin
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