Alpha Tweening Worksheet

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Alpha Tweening Practice worksheet I

Alpha tweening is the animation of a changing alpha value of an object or group of objects. The Alpha channel is responsible for the amount of light* that passes through a pixel. By animating a change in the alpha value of an objects pixels you can make an object gradually appear or disappear on screen.The following exercises are designed to help reinforce the concept of keyframes and the way in which are used to create tweens. Recreate the tweens by following the instructions below. Then save the .fla file and the .swf file to your portfolio folder.

	What is the Alpha channel ?
	How to Alpha tween

	How to add frames
	How to add keyframes

	How to draw shapes

	How to import images to the library
	How to import images to the stage


	How to convert an image to graphic symbol
	What is a graphic symbol?

Exercise I Appearing Act (A Star Is Born)

Step I	Download this image and import it to the stage. Then convert the image to a graphic symbol. Name the graphic "astartisborn".


Step II	Create a new keyframe at frame 62. Then add the "astarisborn" graphic


Step III	Select the graphic in frame 1, then in the color drop down menu (in the properties panel) choose "alpha" an set the value to 0%.


Step IV	Select the graphic in frame 62, then in the color drop down menu (in the properties panel) choose "alpha" an set the value to 100%.


Step V	Right click between frames 1 and 62 then select "Create Motion Tween".

Exercise II Disappearing Act (Fading Scarlet)

Step I	Download this image and import it to the stage. Then convert the image to a graphic symbol. Name the graphic "fadingscarlet".


Step II	Create a new keyframe at frame 62. Then add the "fadingscarlet" graphic


Step III	Select the graphic in frame 1, then in the color drop down menu (in the properties panel) choose "alpha" an set the value to 100%.


Step IV	Select the graphic in frame 62, then in the color drop down menu (in the properties panel) choose "alpha" an set the value to 0%.


Step V	Right click between frames 1 and 62 then select "Create Motion Tween".