Adobe After Effects CS4 Bedienungsanleitung PDF herunterladen (Seite 680)

100

101

674

USING AFTER EFFECTS CS4

Expressions

Last updated 12/21/2009

Transforms a point from layer space to view-independent world space. Example:

toWorld.effect("Bulge")("Bulge Center")

Dan Ebberts provides an expression on his MotionScript website that uses the toWorld method to auto-orient a layer

along only one axis. This is useful, for example, for having characters turn from side to side to follow the camera while

remaining upright.

Carl Larsen provides a pair of video tutorials on the Creative COW website in which he explains the basics of parenting

and then uses an expression involving the

toWorld method to trace the path of an animated child layer:

• part 1

• part 2

fromWorld(point, t=time) Return type: Array [2 or 3].

Argument type: point is an Array [2 or 3], and t is a Number.

Transforms a point from world space to layer space. Example: fromWorld(thisComp.layer(2).position)

See

“Expression example: Create a bulge between two layers

” on page 685 for an example of how this method can be

used.

toCompVec(vec, t=time) Return type: Array [2 or 3].

Argument type: vec is an Array [2 or 3], and t is a Number.

Transforms a vector from layer space to composition space. Example: toCompVec([1,0])

fromCompVec(vec, t=time) Return type: Array [2 or 3].

Argument type: vec is an Array [2 or 3], and t is a Number.

Transforms a vector from composition space to layer space. Example (2D layer):

dir=sub(position, thisComp.layer(2).position);

fromCompVec(dir)

toWorldVec(vec, t=time) Return type: Array [2 or 3].

Argument type: vec is an Array [2 or 3], and t is a Number.

Transforms a vector from layer space to world space. Example:

p1 = effect("Eye Bulge 1")("Bulge Center");

p2 = effect("Eye Bulge 2")("Bulge Center");

toWorld(sub(p1, p2))

fromWorldVec(vec, t=time) Return type: Array [2 or 3].

Argument type: vec is an Array [2 or 3], and t is a Number.

Transforms a vector from world space to layer space. Example: fromWorld(thisComp.layer(2).position)

fromCompToSurface(point, t=time) Return type: Array [2].

Argument type: point is an Array [2 or 3], and t is a Number.

Projects a point located in composition space to a point on the surface of the layer (zero z-value) at the location where

it appears when viewed from the active camera. This method is useful for setting effect control points. Use with 3D

layers only.

1 2 ... 675 676 677 678 679 680 681 682 683 684 685 ... 777 778

Kommentare zu diesen Handbüchern

Keine Kommentare

Adobe After Effects CS4 Bedienungsanleitung Seite 680

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Software Adobe After Effects CS4