Adobe After Effects CS4 Manual de usuario descargar pdf (Pagina 676)

100

101

670

USING AFTER EFFECTS CS4

Expressions

Last updated 12/21/2009

Returns the width of the layer, in pixels. It is the same as source.width.

height Return type: Number.

Returns the height of the layer, in pixels. It is the same as source.height.

index Return type: Number.

Returns the index number of the layer in the composition.

parent Return type: Layer, Light, or Camera.

Returns the parent Layer object of the layer, if it has one. Example: position[0] + parent.width

hasParent Return type: Boolean.

Returns true if the layer has a parent or false if it doesn’t.

Use the hasParent attribute to determine if a layer has a parent layer. You can use this attribute even if the layer has

no parent layer at present. For example, the following expression indicates that the layer to which you apply it wiggles

based on the position of the parent. If the layer has no parent, then it wiggles based on its own position. If the layer is

given a parent later, then the behavior of the layer changes accordingly:

idx = index;

if (hasParent) {

idx = parent.index;

}

thisComp.layer(idx).position.wiggle(5,20)

inPoint Return type: Number.

Returns the In point of the layer, in seconds.

Note: In general, the value of outPoint is greater than the value of inPoint. However, if a layer is reversed in time, the

value of

inPoint is greater than the value of outPoint. Similarly, the value of startTime can be greater than the value

inPoint.

outPoint Return type: Number.

Returns the Out point of the layer, in seconds.

startTime Return type: Number.

Returns the start time of the layer, in seconds.

hasVideo Return type: Boolean.

Returns true if the layer has video, or false if it doesn’t.

hasAudio Return type: Boolean.

Returns true if the layer has audio or false if it doesn’t.

active Return type: Boolean.

Returns true if the Video switch is on for the layer and the current time is in the range from the In point of the layer

to the Out point of the layer; false otherwise.

audioActive Return type: Boolean.

Returns true if the Audio switch is on for the layer and the current time is in the range from the In point of the layer

to the Out point of the layer; false otherwise.

enabled Return type: Boolean.

1 2 ... 671 672 673 674 675 676 677 678 679 680 681 ... 777 778

Comentarios a estos manuales

Sin comentarios

Adobe After Effects CS4 Manual de usuario Pagina 676

Comentarios a estos manuales

Relacionado con productos y manuales para Software Adobe After Effects CS4