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Scrolling Text Algorithm for a Screen Saver
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Scrolling Text Algorithm for a Screen Saver


  • Subject: Scrolling Text Algorithm for a Screen Saver
  • From: "Doug Fort" <email@hidden>
  • Date: Mon, 30 Oct 2006 04:34:13 -0500

Hi,

I'm working on a screen saver. It involves scrolling text across the
screen. I'm using the simplest algorithm I could  think of: calls to
NSString drawAtPoint:withAttributes: with the point moving a fixed
offset at each call to animateOneFrame. This works Ok at low scrolling
speeds, but at higher speeds (i.e. a larger offset), the motion
appears jerky.

I'm working on improving my code to minimize the amount of computation
in animateOneFrame. However, if anyone can suggest a better algorithm
for scrolling text, I'd appreciate it.
--

--
Doug Fort, Consulting Programmer
http://www.dougfort.com
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