Push 21

A push is an effect where one source image replaces another, with both sources moving at the same time. For example, source A would typically occupy the entire screen, and then source B would slide in from the right, while source A slides out in the opposite direction. Unlike the slide effect, both source A and source B are moving. The push effect executes from one of four fixed directions: top, right, bottom, or left.

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.
From direction	`'from'`	`kParameterTypeDataEnum`	Contains one of four directions from which source B will replace source A: top, right, bottom, or left.

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.

From direction

'from'

kParameterTypeDataEnum

Contains one of four directions from which source B will replace source A: top, right, bottom, or left.

From Direction Enum

The from direction parameter can contain the following values:

Top
Right
Bottom
Left