Slide 21

In an slide effect source B slides onto the screen to cover source A. At the end of the effect, source B will completely cover source A. The angle from which source B enters the frame is stored in a parameter, with 0 degrees being the top of the screen.

In the example above, the angle parameter is tweened, causing source B to approach from a changing angle.

Parameters

Use the descriptions below to help you understand what the parameters do. To learn how to use parameter atoms, see "Adding Video Effects to a QuickTime Movie"

Name	Code	QTAtom Type	Description
Percentage	`'pcnt'`	`kParameterTypeDataFixed` Always a tween	This parameter contains a tween. As the effect progresses, QuickTime renders the frame of the effect indicated by the tween's current value, as a percentage of the whole effect. For example, if the tween goes from 0 to 100, the effect renders completely; if the tween goes from 25 to 75, rendering begins 25% into the effect and terminates 75% through the effect.
Slide angle	`'angl'`	`kParameterTypeDataFixed` Can be a tween	The angle from which source B will enter the frame. This value is expressed in degrees, with `0` degrees defined as the top of the screen.

Name

Code

QTAtom Type

Description

Percentage

'pcnt'

kParameterTypeDataFixed

Always a tween

This parameter contains a tween. As the effect progresses, QuickTime renders the frame of the effect indicated by the tween's current value, as a percentage of the whole effect. For example, if the tween goes from 0 to 100, the effect renders completely; if the tween goes from 25 to 75, rendering begins 25% into the effect and terminates 75% through the effect.

Slide angle

'angl'

kParameterTypeDataFixed

Can be a tween

The angle from which source B will enter the frame. This value is expressed in degrees, with 0 degrees defined as the top of the screen.