animated gifs

[Ethan M. <merritt@u.washington.edu>]

I've modified gd.trm to support the use of animated gifs to 
store a sequence of plots.
	set term gif animate {delay <time>} {noopt$imize}

libgd version 2.0.29 or newer is required (2.0.33 is recommended).
./configure will auto-detect whether your libgd supports animation.

Sample animations can be viewed from
	http://www.bmsc.washington.edu/people/merritt/gnuplot/
	http://gnuplot.sourceforge.net/demo_4.1/animate.html

The default behaviour is optimized encoding (only store the difference
between successive frames.  Not all viewing programs handle this
properly, however, and in particular if you want to be able to
extract a single frame from the sequence it may be necessary to
specify "nooptimize".


-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington 98195-7742