display
a variable. GrADS will return
an animation sequence. By default, the animation dimension is time, but
you may specify a different dimension to animate by using the following command:
set loopdim
x|y|z|t
If you wish to animate a variable with fewer than three varying dimensions (i.e., animate a line graph), you can control animation by entering:
set looping
on|off
Remember to set looping off
when you are done animating, or you will get a surprise when you display
your next expression!
set dbuff on
When you issue a display command after turning on double buffering, the
image is drawn to the backgound buffer. Then you issue the swap
command, and GrADS swaps the background and foreground buffers so you can
see what you've displayed. swap
works like clear
in that it resets
many graphics options. Here is a sample script demonstrating how to use
double buffering:
'open model.ctl' 'set dbuff on' t = 1 'set gxout shaded' while (t <= 5) 'set t 't 'draw title Temperature' 'd t' 'cbarn' 'swap' t = t + 1 endwhile
You may also control the speed of the animation by inserting a q
pos
following the swap
command -- then each click of the mouse would move to the next time step.