[GRASS-dev] Re: windows binaries

[Michael Barton]

OK. I think I get it. Sorry about being dense.

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



> From: Glynn Clements <glynn at gclements.plus.com>
> Date: Sat, 11 Nov 2006 20:22:47 +0000
> To: Michael Barton <michael.barton at asu.edu>
> Cc: Paul Kelly <paul-grass at stjohnspoint.co.uk>, Hamish
> <hamish_nospam at yahoo.com>, <grass-dev at grass.itc.it>
> Subject: Re: [GRASS-dev] Re: windows binaries
> 
> 
> Michael Barton wrote:
> 
>> Perhaps I'm missing something, but as I understood the proposed changes to
>> the script itself, the file names are generated in the bash script.
> 
> The script generates the filenames for the intermediate files (the
> ones produced by the individual d.* commands within the script). The
> final step is to use g.pnmcomp to overlay the intermediate files, with
> the output to $GRASS_PNGFILE.
> 
> The end result is that the script behaves like any other d.* command.
> You set GRASS_PNGFILE (etc) and run it; when it's finished, you have
> the images where you asked for them.
> 
> I really don't see how I can explain it any more clearly than that. I
> don't even see what was unclear about the original suggestion:
> 
>> From: Glynn Clements <glynn at gclements.plus.com>
>> Subject: Re: [GRASS-dev] Re: windows binaries
>> Date: Thu, 9 Nov 2006 22:19:32 +0000
>> Message-ID: <17747.43380.785380.210356 at cerise.gclements.plus.com>
> 
>> AFAICT, the necessary changes would be:
>> 
>> 1. At the start of the script:
>> 
>> if [ $GRASS_RENDER_IMMEDIATE = TRUE ] ; then
>>   imgbase=${GRASS_PNGFILE%.ppm}
>> fi
> 
> This makes a note of the base filename ($GRASS_PNGFILE, with the .ppm
> suffix removed). This will be used for intermediate files, so that
> they use the same directory, retain the PID, etc. Also, this makes it
> easier to refer to both the .ppm and .pgm files.
> 
>> 2. After each d.* command:
>> 
>> if [ $GRASS_RENDER_IMMEDIATE = TRUE ] ; then
>>   mv $imgbase.ppm $imgbase.$num.ppm # each image needs a different number
>>   if [ $GRASS_TRANSPARENT = TRUE ] ; then
>>     mv $imgbase.pgm $imgbase.$num.pgm
>>   fi
>> fi
> 
> d.* commands write their output to $GRASS_PNGFILE (and the
> corresponding .pgm file if transparency is enabled). The above moves
> them out of the way so that they don't get clobbered by subsequent d.*
> commands.
> 
> Note: $imgbase.ppm is equal to $GRASS_PNGFILE, as $imgbase is just
> $GRASS_PNGFILE with the .ppm suffix removed (step 1 above).
> 
>> 3. At the end of the script:
>> 
>> if [ $GRASS_RENDER_IMMEDIATE = TRUE ] ; then
>>   if [ $GRASS_TRANSPARENT = TRUE ] ; then
>>     g.pnmcomp \
>> output=$imgbase.ppm \
>> width=$GRASS_WIDTH \
>> height=$GRASS_HEIGHT \
>> input=$imgbase.1.ppm,$imgbase.2.ppm \
>> mask=$imgbase.1.pgm,$imgbase.2.pgm
>>   else
>>     g.pnmcomp \
>> output=$imgbase.ppm \
>> width=$GRASS_WIDTH \
>> height=$GRASS_HEIGHT \
>> input=$imgbase.1.ppm,$imgbase.2.ppm
>>   fi
>> fi
> 
> This overlays the intermediate files, with the result going to
> $GRASS_PNGFILE.
> 
> It needs a slight modification: the transparent case needs:
> 
> outmask=$imgbase.pgm \
> 
> added.
> 
> Also, the intermediate files should be deleted at this point.
> 
> -- 
> Glynn Clements <glynn at gclements.plus.com>