Ae Expression - 360 rotation to percentage

[jadacreata 0]

Hey all,

 

Couldn't find any forum about this.

 

I want to parent a line to rotate with a radial wipe transition. Would be best to attached both to a slider. Any ideas?

 

or

 

Any idea what the expression is to convert 360 rotation to 100%?

 

 

thank you,

J

[RVA8 0]

Some Algebra will do the trick. So it's simple cross-multiply and divide like this:

 

R P

---- = ----

360 100

 

R is your rotation value and P is your percentage value. So when cross multiplied gives us:

 

100*R = 360*P

 

then divide to isolate your desired variable, in this case R

 

R = (360*P)/100

 

and there's your expression.

[jadacreata 0]

Thanks RVA8,

 

Thats awesome.

 

I'm still new to expressions, can you write that into a full expression?

 

J.

[RVA8 0]

That is your full expression. Just replace the P variable with your percentage property from your transition effect. If you just drop this directly on your rotation property you can ditch the "R=" part of the equation or just put an "R" as the last line of your expression. Either way should work.

[wysee 0]

You can use the linear function in your expression.

It does exactly what you want

linear(0,360,0,100) will map 360 degrees to 0-100 for exemple