Fade in/out with checkbox tool

[Deskitex]

Please help me create objects to fade in and fade out with the checkbox tool. So I want when the checkbox turns on it will auto fade and vice versa. Here's my code for reference:

FI=effect("Fade In")("Checkbox");

FO=effect("Fade Out")("Checkbox");

Duration=effect("Duration")("Slider");

if (FI==1){

if (FI==1&&FO==1){

fadeIn=easeOut(time, inPoint, inPoint+.3, 0, 100);

fadeOut=linear(time, outPoint-Duration*.1, outPoint,0, 100)

fade=fadeIn-fadeOut;

}

fadeIn=easeOut(time, inPoint, inPoint+.3, 0, 100)} else if(FI!=1){value;}

if (FO==1){

if (FI==1&&FO==1){

fadeIn=easeOut(time, inPoint, inPoint+.3, 0, 100);

fadeOut=linear(time, outPoint-Duration*.1, outPoint,0, 100)

fade=fadeIn-fadeOut;

}} else if(FO!=1){value;}

[Mylenium]

Your rules don't make any sense and thus disable one another. You need to nest them correctly (pseudo code):

if (FI == 1)

{

if (FO == 1)

{}

else

{}

}

else

{}

Nothing more required. You are making this too complicated.

[Dan Ebberts · Accepted solution]

It appears from your code that you only use the Duration slider for fade out, and I'm not sure about the .1 multiplier, but I think I'd structure it like this:

FI = effect("Fade In")("Checkbox").value;
FO=effect("Fade Out")("Checkbox").value;
Duration=effect("Duration")("Slider");

if (time < (inPoint + outPoint)/2){
  FI ? ease(time,inPoint,inPoint+.3,0,100) : value;
}else{
  FO ? ease(time,outPoint - Duration*.1,outPoint,100,0) : value;
}

[Deskitex]

Thank you I'm still learning so I didn't know that conditional if can be used with time, by the way, why should the 'checkbox' be added with .value? what's the difference?

[Dan Ebberts]

Usually, when you set a variable equal to a control (like a slider or a checkbox) and later reference that variable in the expression, the expression engine assumes you want the control's value, but sometimes it assumes you're referring the object itself, not its value. I don't remember if that was the case here, or if I did it just to be safe. You could try leaving out .value and see if the expression stops working.

[Deskitex]

just one more question, can you explain about this "FI? ease(time,inPoint,inPoint+.3,0,100) : value;" I thought conditionals should always have a condition (like FI=1 blablabla) so I was quite surprised by "FI?", that's why my code is quite messy.

[Dan Ebberts]

? followed by : is JavaScript's conditional operator. It's just a shorthand way of putting a short if/else on a single line;

FI ? ease(time,inPoint,inPoint+.3,0,100) : value;

is the same as

if (FI) { ease(time,inPoint,inPoint+.3,0,100) }else{ value };

[Deskitex]

Thanks a lot sir, now I understand the logic 😉