• Adobe After Effects Expressions

  a counter for exact value

  Posted by Kyaw Min on June 13, 2021 at 3:47 am

  I want to make a counter for exact value

  e.g in midi slider (thisComp.layer(“midi”).effect(“ch_0_pitch”)(“Slider”))

  includes notes’ values such as 45, 62, 48,45,45,82,95,72,45

  I want to count only note value 45 when slider pass it’s keyframe and create it’s increment counter.

  BTW my AE crash when I use while loop. so, It’s difficult to test with while loop.

  Kyaw Min replied 5 years ago 2 Members · 2 Replies

  • Basic
• 2 Replies

• 

  Filip Vandueren

  June 14, 2021 at 2:40 pm

  I suppose you only want to count it when a keyframe on the slider equals 45, not when the slider happens to interpolate across 45 (e.g. from 44 -> 46if they’re not hold keyframes).

  sl = thisComp.layer("midi").effect("ch_0_pitch")("Slider");
  count=0;
  for (i=1; i<=sl.numKeys; i++) {
  	if (sl.key(i).time>time) break
  	if (sl.key(i).value==45) count++;
  }
  count
• 

  Kyaw Min

  June 14, 2021 at 4:28 pm

  Thanks Filip,

  That is all I need .

  TBH , I don’t know how to use brake and continue. This is why I was stuck.

  I can count. but when criteria doesn’t meet , it shows the numbers blank or zero.

  Just blink the count number when a keyframe on the slider equals 45.

  I want to show the count number all the time just like you.

  Now happily finish one part.

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