Animating Depth: Tweening Movement - Flash 3D: Animation, Interactivity, and Games - page 75

Exercise 3.3: Parallax Scrolling Using Vector Art
This exercise walks you through a similar process for creating a parallax scroll using
vector art. The tweening techniques are the same to achieve the parallax movement.
Creating the scrolling artwork in Flash takes some preparation. This exercise focuses on
the preparation. The completed version is provided in the Chapter 3 folder on the CD.
To see the finished results, play 3_4_parallaxVector_DONE.swf (Figure 3.32).
Figure 3.32 Finished parallax scroll ( 3_4_parallaxVector_DONE )
Step 1: Getting started
Open the file 3_4_parallaxVector.fla in the Chapter 3 folder. This Flash movie con-
tains the artwork you need to complete this exercise. The Timeline contains four layers:
sky and ground , background , middleground , and foreground . The foreground layer
contains the snowboarder and his drop shadow from Chapter 2. He will remain in this
position on the Stage. The illusion of movement and depth will be achieved through the
tweening of the pine trees.
Step 2: Hide layers
Let's start with the background layer. Before we do this, hide all the layers in the
Timeline except the background layer. This will allow you to see the Stage when cre-
ating the scrolling artwork. It is good practice to get in the habit of hiding or locking
layers that you are not working on. This will prevent any accidental changes that could
take time to correct later on.