Argument type: point is an Array [2], radius is an Array [2], postEffect is a Boolean, and t is a Number.
Samples the color and alpha channel values of a layer and returns the average alpha-weighted value of the pixels within the specified distance of
the point as an array: [red, green, blue, alpha]. If postEffect is true, the sampled values are for the layer after masks and effects on that layer have
been rendered; if postEffect is false, the sampled values are for the layer before masks and effects have been rendered. The input value point is
in layer space; the point [0,0] is the center of the top-left pixel in the layer. The input value radius specifies the horizontal and vertical distance
from the sample center to the edges of the sampled rectangle. The default value samples one pixel.
The postEffect parameter refers to effects applied directly to the layer, not to effects applied indirectly, such as with an adjustment layer.
This example samples a rectangle 4 pixels wide and 3 pixels high, centered around a point 100 pixels down and to the right of the upper-left
Dan Ebberts provides an example of how to use the sampleImage method on his MotionScript website.
The AE Enhancers forum provides an expression that uses the sampleImage method to measure a text layer or shape layer and determine its
effective bounding box.
Todd Kopriva provides instructions for using the sampleImage method and the Point Control effect to monitor colors for a specified point during
color correction on his After Effects Region of Interest blog.
Layer Properties attributes and methods (expression reference)
When you add masks, effects, paint, or text to a layer, After Effects adds new properties to the Timeline panel. There are too many of these
properties to list here, so use the pick whip to learn the syntax for referring to them in your expressions.
Return type: Property [2 or 3].
Returns the anchor point value of the layer in the coordinate system of the layer (layer space).
Return type: Property [2 or 3].
Returns the position value of the layer, in world space if the layer has no parent. If the layer has a parent, returns the position value of the layer in
the coordinate system of the parent layer (in the layer space of the parent layer).
Return type: Property [2 or 3].
Returns the scale value of the layer, expressed as a percentage.
Return type: Property.
Returns the rotation value of the layer in degrees. For a 3D layer, it returns the z rotation value in degrees.
Return type: Property.
Returns the opacity value for the layer, expressed as a percentage.
Return type: Property [2].
Returns the value of the Audio Levels property of the layer, in decibels. This value is a 2D value; the first value represents the left audio channel,
and the second value represents the right. The value is not the amplitude of the audio track of the source material. Instead, it is the value of the
Audio Levels property, which may be affected by keyframes.
Return type: Property.
Returns the value of the Time Remap property, in seconds, if Time Remap is enabled.
Return type: MarkerKey.
Argument type: index is a Number.
Returns the MarkerKey object of the layer marker with the specified index.
Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.
Product:
Forumrules
To achieve meaningful questions, we apply the following rules:
First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.
Register
Register getting emails for Adobe After Effects CC 2013 at:
new questions and answers
new manuals
You will receive an email to register for one or both of the options.
Get your user manual by e-mail
Enter your email address to receive the manual of Adobe After Effects CC 2013 in the language / languages: English as an attachment in your email.
The manual is 7,16 mb in size.
You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.
If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.
The email address you have provided is not correct.
Please check the email address and correct it.
Your question is posted on this page
Would you like to receive an email when new answers and questions are posted? Please enter your email address.
