We are trying to include a news-feed text crawl in an
application we are doing. Getting it to run is no problem, getting
it to run smoothly, without hesitations is a big problem. Even when
all the text is visible on screen, and it's just moving across the
screen without letters coming onto the screen or leaving the
screen, there are hesitations in the motion.
Since we are putting in a news feed, we used dynamic text of
course, to be able to include any amount of text, we read the
length of the string that is input and derive an _x scaling factor
for the text that is applied to the dynamic text box and start and
end points for the motion. Then as the swf plays, we move the
symbol 5 pixels to the left each frame.
It seems like the fact that we are moving the symbol with the
text in precise pixel increments would ensure that our motion
should be pretty stable. We have tried many methods including doing
the location updates on the main timeline and doing them within a
symbol. Using a floating point number rather than an integer seemed
to smooth it a bit.
I know that lots of text can be a problem for flash because
of needing to stroke the letters. Does anyone know how Flash
handles letters that are beyond the clipping plane. Does it just
ignore them or does it stroke them and then clip them?