<p>So that's two questions.</p>

<p>1: You sure can _put information of mask tracker to another object's position.</p>

<p>what information are you talking about?</p>

<p>2: Yes.</p>

CC BY-SA 4.0
2019-03-07T11:26:55.537Z
2019-03-07T11:26:55.537Z
Florian Claaßen
<p><strong>1.</strong> In recent versions (2018+) of AE you can access the mask vertices through expressions using the <code>points()</code> function or the <code>pointOnPath()</code> function that is available for all path objects. </p>

<p>The <code>points()</code> function returns an array of all the path vertices, so you need to use the square brackets to designate which member of the array you want, for example :</p>

<pre><code>thisComp.layer("my masked layer").mask("my tracked mask 1").points(t = time)[5]
</code></pre>

<p>would give you the sixth (counting starts at zero) point on the mask, in layer coordinates (so the position is given relative to that layer). <code>t=time</code> is the default and is optional, you can set it to return the value from another time e.g. <code>t=time-someLayer.inpoint</code>.</p>

<p>Or to find a point along the path, not just a vertex:</p>

<pre><code>thisComp.layer("my masked layer").mask("my tracked mask 1").pointOnPath(percentage = 0.5, t = time)
</code></pre>

<p>would return the half way point on a mask. </p>

<p>Tangent handles are also available for expressions.</p>

<p>Adobe's documentation is available <a href="https://helpx.adobe.com/after-effects/using/expression-language-reference.html#Expressionaccesstopathspointsonshapesmasksandbrushstrokesexpressionreference" rel="nofollow noreferrer">here</a>, should you wish to RTFM</p>

<p><strong>2.</strong> Not quite sure what the second part of your question is asking.</p>

CC BY-SA 4.0
2019-08-04T12:34:31.470Z
2019-08-04T12:34:31.470Z
stib
<p>can I put information of mask tracker to another object's position??</p>

<p>or</p>

<p>can I do parent other object to other object masked by mask tracker??</p>

<video><after-effects><production>
can I do parent other object to other object masked by mask tracker?
seungjoon C
# can I do parent other object to other object masked by mask tracker?

(Asked by: username_0 on 2019-03-05)

can I put information of mask tracker to another object's position??

or

can I do parent other object to other object masked by mask tracker??

**Tags:** video, after-effects, production


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## 2 answers

### Answer by username_1 on 2019-03-07. Score: 0

So that's two questions.

1: You sure can \_put information of mask tracker to another object's position.

what information are you talking about?

2: Yes.


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### Answer by username_2 on 2019-08-04. Score: 0

1. In recent versions (2018+) of AE you can access the mask vertices through expressions using the points() function or the pointOnPath() function that is available for all path objects. 
The points() function returns an array of all the path vertices, so you need to use the square brackets to designate which member of the array you want, for example :
thisComp.layer("my masked layer").mask("my tracked mask 1").points(t = time)[5]

would give you the sixth (counting starts at zero) point on the mask, in layer coordinates (so the position is given relative to that layer). t=time is the default and is optional, you can set it to return the value from another time e.g. t=time-someLayer.inpoint.
Or to find a point along the path, not just a vertex:
thisComp.layer("my masked layer").mask("my tracked mask 1").pointOnPath(percentage = 0.5, t = time)

would return the half way point on a mask. 
Tangent handles are also available for expressions.
Adobe's documentation is available here, should you wish to RTFM
2. Not quite sure what the second part of your question is asking.


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