Video of Jose's sprite technique at Remix: Watch Remix Video: The Next Level of Creativity with Expression Blend 3 http://www.microsoft.com/australia/remix/videos/default.aspx?vid=v24
About 10min in. Shane From: [email protected] [mailto:[email protected]] On Behalf Of John OBrien Sent: Monday, 21 September 2009 1:43 PM To: [email protected] Subject: RE: animation cpu usage Ross, I used Jose Fajardo's sprite concept from Remix to change a high cpu repeating animation to a simple sprite (set of frames in one image, repeating animation is just translate x). It may not be ideal but for me it took the animation down to 1-2% cpu. His blog is here, but I'm not sure if he ever posted about it: http://www.cynergysystems.com/blogs/page/josefajardo John. From: [email protected] [mailto:[email protected]] On Behalf Of Ross Jempson Sent: Monday, 21 September 2009 12:06 PM To: [email protected] Subject: animation cpu usage Hi there, This is an old question I posted when the list was down. Does anyone have any suggestions as to how I can minimise cpu usage when using a storyboard/animation(s) that repeat constantly. To explain the scenario, I have a screen that has a background that sort of looks like a night sky. There are say 100 little stars (the same png scattered around with various sizes). I animate the opacity / ScaleX / ScaleY of a random png every 1 second to create a twinkling effect that keeps running the whole time you view the screen. The effect is very nice, however I notice it hogs the cpu. I have tried 2 implementations. In the first implementation I created a storyboard with 3 animations. I created a timer that fired every 1 second, and on the fly set the animations to target one of the pngs randomly (stopping and starting the storyboard each time). This was consuming on average 80% of my CPU. I created a second implementation to see if I could improve the situation. In the second implementation I decided to build up the storyboard in code up front. I create 40 animations up front targeting random pngs, each with a begintime 1 second later than the previous and add them all to the one master storyboard. I then just run that storyboard over and over. However, this approach made no difference to the cpu being consumed. Cheers.
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