[Sandro Maia]

Oh one pice of information i forgot to mention, Null 1 also has the position linked to Null 2 position. That’s why i have to take that into account on the formula

[Sandro Maia]

I see your point, but if i remove null2 the layer jumps position to another place in the comp.

[Sandro Maia]

Thats unfortunate. Okay thank you. Do you think its possible to fix that offset of the Null 1 when the checkbox is on? I can’t for the life of me figure it out…

[Sandro Maia]

Also here’s the project file if you want to take a look

Null-test.aep 420 KB After Effects Project Files - Click to view

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[Sandro Maia]

Sorry Dan, English is not my first language, so it might be difficult to translate ideas, if it helps this is what i tried:

It mostly works, if i uncheck the checkbox the layer stops following Null 1, the problem is that when i check the box for it to follow again, the layer has an offset and its moving more than it should.

var checkbox = effect("Checkbox Control")("Checkbox");
var null1 = thisComp.layer("Null 1").transform.position;
var null2 = thisComp.layer("Null 2").transform.position;
var null3 = thisComp.layer("Null 3").transform.position;

// Always follows Null 2 and Null 3 wether checkbox is on/off

if (checkbox == 1) {
    // If checkbox is checked, follow Null 1 and Null 2 and Null 3
    null3 + (null1 - null2)
} else {
    // If checkbox is unchecked, follow Null 2 and Null 3
    null3 + (null2 - null1)
}

[Sandro Maia]

Hi Dan,

What I mean is that all three nulls should be able to move Null1 as if it were a regular null. However, I want to add a checkbox that allows me to toggle whether Null2 can control Null1’s position. The checkbox doesn’t need to be keyframed, although that would be a plus if it could. But this should all work with no keyframes at all and if I want to keyframe the position of any given null I would want that possibility. Would this be possible?

Let me know if that makes sense!

[Sandro Maia]

Hi Dan,

Thanks again, everything is working perfectly!

I have one more question that might be a bit of a stretch: would it be possible for the red dots layer to scale up not just when the circle size changes, but also proportionally when the stroke width is adjusted?

I’ve attached a screenshot for reference, and I’ve also uploaded the AE project if that makes it easier to understand.

The red dots layer is a vector file, and I’d like it to dynamically align along the outer edge of the stroke, no matter how the circle size or stroke width changes. Ideally, the dots should stay perfectly aligned to the outer edge of the stroke.

Lastly, if it’s possible to add a controller for adjusting the stroke width directly, that would be perfect!

Thanks again for your help. I really appreciate it!

[Sandro Maia]

Dan, as always you are genius.

Is there also a way to maintain de stroke Width of the circle as the values of the circle size path increases? so everything goes up proportionally ?

[Sandro Maia]

Worked perfectly Dan! You’re a life saviour! Thank you!

[Sandro Maia]

Yeah you’re right!

Thanks Filip!