From: "Carey Dissmore" <AE-List@media-motion.tv>
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Subject: Re: [AE] Repelling layers
Date: Wed, 15 Jan 2020 12:51:07 -0600
References: <list-7492529@media-motion.tv>
To: After Effects Mail List <AE-List@media-motion.tv>
In-Reply-To: <list-7492529@media-motion.tv>
Message-Id: <E0004F4D-9CA1-41E8-A7FF-AA9772C3B51F@imugonline.com>

Very nice, Nathan!
Carey


> On Jan 15, 2020, at 12:25 PM, scott.aelist <AE-List@media-motion.tv> =
wrote:
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> This is pretty fancy to me. Thanks for sharing Nathan : )
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> On Wed, Jan 15, 2020 at 10:15 AM Nathan Shipley =
<AE-List@media-motion.tv> wrote:
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>> Henry,
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>> Here's something really basic I just whipped up that simply moves =
layers away from a null.  It just pushes objects away from where the =
null is when they're closer than the "Distance Threshold" control.  You =
can increase the amount that they move with "Move Away Multiplier."
>>=20
>> Just paste the position expression from one of the solids to your own =
layers and it should work or at least be a starting point to tinker =
further.  Expression pasted below as well:
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>> Here's a quick screencapture showing what it does:
>> https://www.dropbox.com/s/97yymslvdmjgeez/MoveAwayDemo_01.mp4?dl=3D0
>>=20
>> And here's the .AEP:
>> =
https://www.dropbox.com/s/8g3scef520fir3r/MoveAwayExpression_NS_01.aep?dl=3D=
0
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>> Not fancy but maybe helpful?
>> - Nathan
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>> p =3D transform.position;
>> nullPos =3D thisComp.layer("Parent And Controls").transform.position;
>> distanceThreshold =3D thisComp.layer("Parent And =
Controls").effect("Distance Threshold")("Slider");
>> moveAwayMult =3D thisComp.layer("Parent And Controls").effect("Move =
Away Muliplier")("Slider");
>>=20
>> distance =3D length(p, nullPos);
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>> if (distance < distanceThreshold) {
>>    distanceMult =3D (Math.log(distanceThreshold / distance)) * =
moveAwayMult;
>>    delta =3D nullPos - p;
>>    nDelta =3D (normalize(delta));
>>    newPos =3D p - nDelta * distanceMult;
>> } else {
>>    p
>> }
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>> On Wed, Jan 15, 2020 at 9:13 AM henry birdseye =
<AE-List@media-motion.tv> wrote:
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>>> This is true. If I had any sort of budget at all this would be =
ideal.
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>>> About a decade ago, ways of doing this abounded on the interwebz...
>>> those links have since passed on. Character Animator has a physics
>>> engine I may explore.
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>>>=20
>>> On 1/15/2020 11:00 AM, Peter Lund wrote:
>>>> Hi,
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>>>> i gutes you need something like this.
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>>>> https://aescripts.com/newton/
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>>>> a physic engine that helps you with the repelling and interaction.
>>>>=20
>>>> this is all I found under =E2=80=9Ephysic=E2=80=9C topic =E2=80=A6
>>>>=20
>>>> https://aescripts.com/search/?q=3Dphysic
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>>>> hope this helps you
>>>>=20
>>>> Peter
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>>>>> Am 15.01.2020 um 14:40 schrieb henry birdseye =
<AE-List@media-motion.tv>:
>>>>>=20
>>>>> I'm trying to get some layers to be repelled by a passing object, =
the links I've found for how to do this are years old and don't work =
properly.
>>>>>=20
>>>>> Paul Tuersley's project no longer exists at =
http://www.aenhancers.com/viewtopic.php?t=3D630 and that seems ideal for =
what I need to do.
>>>>>=20
>>>>> Can anyone help me find a setup I can kind of plug right into. =
This, of course, came as a last minute client request.
>>>>>=20
>>>>> HB
>>>>>=20
>>>>>=20
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>>>>=20
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>>>=20
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