dancing logo


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dancing logo
by Michael Cline on Apr 8, 2008 at 12:00:11 am

So.....now i have to make a logo dance randomly across the screen to music. I have my music track turned to key frames......where do i go from here? Could someone send me in the right direction?
thanks
-michael

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Re: dancing logo
by Michael Ricks on Apr 8, 2008 at 12:29:36 am

Possibly some expressions. Check out http://www.motionscript.com/design-guide/toc.html as a starting point.

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Re: dancing logo
by Mike Clasby on Apr 8, 2008 at 12:38:53 am

"now i have to make a logo dance randomly across the screen to music."

Define "dance". Do you want it to assume a new random spot on the beat or move in a continuous way, from spot to spot with the beat?

If you want to jump in on your own, here is a page on making things happen to the beat:

http://www.motionscript.com/design-guide/audio-trigger.html

He is a series, four pages, on random expressions:

http://www.motionscript.com/mastering-expressions/random-1.html

For the quickest, if you got the "hold time" to match the time of the beats, here are two expressions from that last page that would do the trick:

holdTime = .5; //time to hold each position (seconds)
minVal = [0.1*thisComp.width, 0.1*thisComp.height];
maxVal = [0.9*thisComp.width, 0.9*thisComp.height];

seed = Math.floor(time/holdTime);
seedRandom(seed,true);
random(minVal,maxVal)

and for continuous movement

segDur = .5;// duration of each "segment" of random motion
minVal = [0.1*thisComp.width, 0.1*thisComp.height];
maxVal = [0.9*thisComp.width, 0.9*thisComp.height];

seed = Math.floor(time/segDur);
segStart = seed*segDur;
seedRandom(seed,true);
startVal = random(minVal,maxVal);
seedRandom(seed+1,true);
endVal = random(minVal,maxVal);
ease(time,segStart,segStart + segDur, startVal, endVal);

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Re: dancing logo
by Michael Cline on Apr 8, 2008 at 4:08:11 pm

Sorry, i should clarify a little bit better.........I'm looking to make this logo "hop" around on screen, kinda like a bunny rabbit.
Any thoughts?

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