• Adobe After Effects Expressions

  Text Counter Connected to Layers Z-Rotation

  Posted by Doug Sand on May 17, 2016 at 5:12 pm

  I’m trying to build an analog meter with a digital text readout. Basically, I need the the source text to read out the rotational value of another layer. As you can see in the image, I want it to be able to read 0 when the needle is at 0, 1 when the needle is at 1 and so on and so forth.

  All help is much appreciated!

  

  Xavier Gomez replied 10 years, 3 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Xavier Gomez

  May 17, 2016 at 5:41 pm

  This might work:

  minRot = -75;
maxRot = 75;
minValue = 0;
maxValue = 6;
rot = thisComp.layer("Shape Layer 3").transform.zRotation;
linear(rot, minRot, maxRot, minValue, maxValue);

  Xavier
• 

  Doug Sand

  May 17, 2016 at 5:46 pm

  Genius, genius, genius! One last question. What can I add to the code to keep the text to only two decimal points?

  

  -Doug
• 

  Xavier Gomez

  May 17, 2016 at 6:46 pm

  ***If you want exactly 2 decimals, you can use:

  … // same beginning
  x = linear(rot, minRot, maxRot, minValue, maxValue);
  x.toFixed(2);

  ***And if you want at most 2 decimals:

  …
  x = linear(rot, minRot, maxRot, minValue, maxValue);
  Math.floor(x*100)/100;

  Xavier

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