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dura
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1987-05-15
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DURA ( < number of ticks > )
DURA stands for DURAtion of one frame.
The basic unit of timing for NTSC video is 1/60th second,
and for PAL video it is 1/50th second. This unit we call
a "jiffy".
The duration statement (DURA) within Global Variables
(GLOV) in the initialization (INIT) section tells PFX how
many "jiffies" to hold each frame in the sequence before
displaying the next one.
To hold a frame for a time periods longer than specified
within the duration statement, it is necessary to put the
frame in a loop, with a counter equal to the number of
"durations" the frame is to be held.
The default duration is four "jiffies", which would give
15 frames/sec. for NTSC video, and 12.5 frames/sec for PAL
video. This would give you smooth animation, depending on
the construction of your images.
Refer to the Tutorials in the Manual for more information.