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LuisBranco97
Participating Frequently
March 8, 2020
Answered

After Effects - Checkbox Control expression to fill effect.

  • March 8, 2020
  • 1 reply
  • 15364 views

Hello! How can I create an expression for checkbox Control to "Fill" effect in a PNG logo? I would like that when the checkbox is marked, the logo takes on the solid color filling, and when disabled keep the original colors of the logo. Can anyone help me with this issue? Thanks!

    Correct answer Roland Kahlenberg

    This is the Expression you need -

     

    if(effect("Checkbox Control")(1)==1) {100} else {0}

    --------------

    The image below provides context on where to apply the Expression.

     

    1 reply

    Roland Kahlenberg
    Roland KahlenbergCorrect answer
    Legend
    March 8, 2020

    This is the Expression you need -

     

    if(effect("Checkbox Control")(1)==1) {100} else {0}

    --------------

    The image below provides context on where to apply the Expression.

     

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      L
      LuisBranco97Author
      Participating Frequently
      March 8, 2020

      Thanks for the answer! I don't know if I did something wrong, but the checkbox only worked when the checkbox control was applied to the same layer as the fill, my intention is to use the checkbox applied to a layer of controllers, created from a null object. After Effects pointed out an error in the expression when used in this way (I applied the expression in the location indicated in the image you sent and with the pick whip I applied the Effect Opacity of the Fill to the checkbox control placed on the null object, I got an error).

       

      What could I have done wrong?

      R
      Community Expert
      Rick GerardCommunity Expert
      Community Expert
      March 8, 2020

      You have to point the expression to the layer that contains the checkbox. Expression basics.

       

      The easiest solution is to declare a variable for the checkbox control by typing something like this:

      chkBx = thisComp.layer("Null 1 Controller").effect("Checkbox Control")("Checkbox");
if (chkBx == 1)
	100
else
	0

      This assumes the layer that contains the Checkbox Control is named "Null 1 Controller" and you have not renamed any of the layers. I prefer this format because it is very easy to tell what you are doing.

       

      You can easily define a layer and effect control by simply typing chkbx = and then dragging the pickwhip to the Checkbox Control's Checkbox.

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