connect rotation value to number generator

[Andrei Popa]

I think you need to link a number to another and the line to only one of the numbers. Let’s say you link it to the one on the left. This should work. The “leftNumber” is the number of the layer on the left.
This expression goes to the rotation of your needle

numberVal = thisComp.layer(“leftNumber”).text.sourceText.value;
linear(numberVal,0,100,-90,90)

The right number should have this to it’s text, so it automatically updates to the one on the left:

numberVal = parseInt(thisComp.layer(“leftNumber”).text.sourceText.value);
100-numberVal;

Andrei
My Envato portfolio.

[Eric Suquet]

Thank you for responding so quickly.

I am having trouble implementing this though.

For reference I have named the left number LEFT and the right RIGHT. I applied this to the the arrow rotation:

and the results are similar to when I just pickwhip it. How do i get the number offset to be correct? this should be more like +65%

And then I can’t get the right number to connect at all to the left. I get this error:

[Robert Müller]

Hm wouldnt this affect the rotation of the needle based on the text value and not the other way around, since the expression is on the rotation of the needle?

I think it would be easier with these expressions.
For the left text:
Math.round(linear(thisComp.layer("needle").transform.rotation,-90,90,100,0))

And for the right text I just switched the mapped values:
Math.round(linear(thisComp.layer("needle").transform.rotation,-90,90,0,100))
I added the “Math.round” so that you’ll get clean values

[Eric Suquet]

sorry, the second image should be this:

[Eric Suquet]

That worked wonderfully. THANKS!