Expression for sine wave modulation of filter intensity

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OpsTao
Posts: 2
Joined: October 11th, 2017, 7:26 pm

October 11th, 2017, 7:34 pm

Can someone suggest an expression method for varying the intensity of an AE filter in a sine wave fashion? The specific application(s) in mind are either a slowly pulsating intensity of gaussian blur, from low to high, and/or pulsating change in opacity. In the case of Gaussian blur, the current max value is around 28-30 and the range desired would be something single-digits up to that value. 
Dan Ebberts
Posts: 319
Joined: June 26th, 2004, 10:01 am
Location: Folsom, CA
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October 13th, 2017, 11:55 am

Play with this:

freq = 1;
midVal = 20;
range = 10;

midVal + range*Math.sin(time*freq*Math.PI*2)


Dan
OpsTao
Posts: 2
Joined: October 11th, 2017, 7:26 pm

October 14th, 2017, 10:07 am

Thanks, Dan Ebberts! As a start this works well, now I can experiment with timing and range.
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