Answers.Body: <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>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-03-07T11:26:55.537Z
Answers.LastActivityDate: 2019-03-07T11:26:55.537Z
Answers.UserDisplayName: Florian Claaßen
Answers.Body: <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>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-04T12:34:31.470Z
Answers.LastActivityDate: 2019-08-04T12:34:31.470Z
Answers.UserDisplayName: stib
Body: <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>
  
Tags: <video><after-effects><production>
Title: can I do parent other object to other object masked by mask tracker?
UserDisplayName: seungjoon C
ThreadText: # 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
  
  
  ---
  
  ## 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.
  
  
  ---
  
  ### 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](https://helpx.adobe.com/after-effects/using/expression-language-reference.html#Expressionaccesstopathspointsonshapesmasksandbrushstrokesexpressionreference), should you wish to RTFM
  
  **2.** Not quite sure what the second part of your question is asking.
  
  
  ---
  
  