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Chapter 8 Interactive Multimedia Authoring with Flash: Animation. Flash: Tweening. In this lecture, you will learn:. the types of tweening: classic tween motion tween shape tween how to create tween animation how to animate an object following a custom path. Tweening.

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in this lecture you will learn
In this lecture, you will learn:
  • the types of tweening:
    • classic tween
    • motion tween
    • shape tween
  • how to create tween animation
  • how to animate an object following a custom path
tweening
Tweening
  • To create movement and changes of visual content over time, without having to manually create the content frame by frame
  • The computer interpolates the changes between 2 keyframes
to create keyframes in flash
To Create Keyframes in Flash
  • Method 1:
    • Select a frame on timeline
    • Choose Insert > Timeline > Keyframe
  • Method 2:
    • Right-click (Windows) or Control-click (Mac OS) on a frame on timeline
    • Choose Insert Keyframe
types of tween in flash
Types of Tween in Flash
  • Classic tween (called Motion tween in Flash CS3 and prior)
  • Motion tween
  • Shape tween
example of classic tween
Example of Classic Tween

A leaf is created as a Graphic symbol, and placed on the stage.

example of classic tween1
Example of Classic Tween

Keyframe at frame 1

example of classic tween2
Example of Classic Tween

Keyframe at frame 20:

The leaf is repositioned, rotated, and scaled bigger.

example of classic tween3
Example of Classic Tween

Keyframe at frame 60:

The leaf is repositioned again, rotated, and scaled smaller.

example of classic tween4
Example of Classic Tween
  • Result after applying classic tween to the keyframes:
  • 60 frames
  • But only 3 keyframes to specify the leaf's position, rotation, and size.
  • The computer interpolates the positions, rotation, and size of the leaf between keyframes.
properties of a symbol instance that can be tweened using classic tween
Properties of a symbol instance that can be tweened using Classic tween
  • Position
  • Rotation
  • Width
  • Height
  • Color
  • Opacity
example of motion tween
Example of Motion Tween

A leaf is created as a Graphic symbol, and placed on the stage.

example of classic tween5
Example of Classic Tween

Keyframe at frame 1

example of classic tween6
Example of Classic Tween

Keyframe at frame 20:

The leaf is repositioned, rotated, and scaled bigger.

example of classic tween7
Example of Classic Tween

Keyframe at frame 60:

The leaf is repositioned again, rotated, and scaled smaller.

properties of a symbol instance that can be tweened using motion tween
Properties of a symbol instance that can be tweened using Motion tween
  • Position
  • Rotation
  • Width
  • Height
  • Color (Classic tween)
  • Opacity (Classic tween)
example of shape tween
Example of Shape Tween

Keyframe at frame 1:

A shape of the letter "I" in blue

example of shape tween1
Example of Shape Tween

Keyframe at frame 15:

A heart shape in pink

example of shape tween2
Example of Shape Tween

Keyframe at frame 40:

A shape of the letter "U" in green

example of shape tween3
Example of Shape Tween
  • Result after applying shape tween to the keyframes:
  • 40 frames
  • But only 3 keyframes to specify the shapes.
  • The computer interpolates the shapes between keyframes.
properties of a shape that can be tweened in shape tween
Properties of a shape that can be tweened in shape tween
  • Position
  • Rotation
  • Width
  • Height
  • Color
  • Opacity
  • Shape
troubleshooting
Troubleshooting
  • If a Classic or Shape tween sequence is working correctly: an solid-line arrow in timeline
  • If a Classic or Shape tween sequence is working incorrectly: a dash line in timeline
possible causes for tweening problems
Possible Causes for Tweening Problems
  • Multiple symbol instances in the same keyframe
  • Classic tween applied to shapes
  • Shape tween applied to symbol instances
  • A mix of symbol instances and shapes in the same keyframe
tween a symbol to follow a path1
Tween a Symbol to Follow a Path
  • Motion path
    • for Motion tween
  • Motion guide
    • for Classic tween
motion guide

Motion Guide

for Classic tween

motion guide1
Motion Guide
  • Allows an object to follow a path that you draw as a stroke
  • Works with symbols, not shapes
to create animation with motion guide
To Create Animation with Motion Guide
  • Create keyframes like you would create a classic tween animation
  • Create a motion guide layer for the tween animation:
    • In the timeline, right-click (Windows) or Control-click (Mac OS) on the motion tween layer.
    • Choose the option of motion guide
  • In the motion guide layer, draw a path (using pencil or pen tool) in one single stroke.Do not create multiple strokes.
  • For each keyframe of the tween animation, drag the symbol instance to snap on the path.
motion guide2

Motion Guide

Example:

Returning to the leaf animation to make it follow a more complex path

example of motion guide
Example of Motion Guide

A classic tween sequence with the leaf is created using only 2 keyframes.

example of motion guide1
Example of Motion Guide

A motion guide is created for the classic tween layer.

example of motion guide2
Example of Motion Guide

A complex path is drawn in the motion guide layer using the Pencil tool.

example of motion guide3
Example of Motion Guide

The leaf in frame 1 (first keyframe) is snapped to the beginning of the path.

example of motion guide4
Example of Motion Guide

The leaf in frame 60 (last keyframe) is snapped to the end of the path.

example of motion guide5
Example of Motion Guide
  • Result:
  • 60 frames of animation
  • The leaf follows the path drawn in the motion guide layer
more about motion guide
More About Motion Guide
  • The color and width of the path do not matter.
  • The motion guide is automatically hidden when the movie plays.
  • In the example:
    • Only 2 keyframes are used but it can have more than 2 keyframes.
    • The leaf is snapped to the two ends of the path, but it can be snapped anywhere along the path.
motion path

Motion Path

for Motion tween

motion path1
Motion Path

A motion path is automatically generated for each Motion twee span.

motion path2
Motion Path

Can be edited like a stroke using Selection and Subselection tools

motion path3
Motion Path
  • Can also be a custom-drawn stroke
  • To apply a stroke as the motion path for a Motion tween:
    • Copy the stroke
    • Select the Motion tween span on the timeline
    • Paste the stroke
slide46
Mask
  • Defines areas to reveal its linked layer (maskee layer)
  • The content in a mask layer can be thought of as a hole that lets the underlying maskee layers show through.
slide47
Mask

a mask

original

mask effect

to create mask effect
To Create Mask Effect
  • On the timeline, arrange the maskee layer immediately below the layer that you want to be the mask layer.
  • On the timeline, right-click (Windows) or Control-click (Mac OS) on the mask layer, and select Mask.
mask effect example

Mask Effect Example

Spotlight Effect

mask effect example spotlight effect1
Mask Effect Example:Spotlight Effect

Maskee content

Maskee layer

mask effect example spotlight effect2
Mask Effect Example:Spotlight Effect

Mask content:black circle

Mask layer

more about mask effect
More About Mask Effect
  • The resulted mask effect can be seen on the stage by locking the mask layer.
  • The mask effect always shows when you do a Test Movie, with or without unlocking the mask layer.
  • Don't forget to unlock the mask layer when you want to edit the mask layer.
mask effect example x ray effect
Mask Effect Example:X-ray Effect

maskee layer(s)

mask layer,

immediately above the maskee layer(s)

Right-click on it, choose "Mask" to make it a mask

mask effect example x ray effect1
Mask Effect Example:X-ray Effect

57

maskee layer(s)

Resulted mask effect

mask layer,

immediately above the maskee layer(s)

Right-click on it, choose "Mask" to make it a mask

57

mask effect example x ray effect2
Mask Effect Example:X-ray Effect

Add a bottom layer of a man

Result

58

mask effect example2

Mask Effect Example

Appearance Effect

mask effect example appearance effect
Mask Effect Example:Appearance Effect

Maskee layer:

Contains only the little alien

mask effect example appearance effect1
Mask Effect Example:Appearance Effect

Mask layer:

Contains only the light beam

mask effect example appearance effect2
Mask Effect Example:Appearance Effect

Mask effect is applied by locking the mask layer.

Note: The mask does not always show up.

mask effect example appearance effect3
Mask Effect Example:Appearance Effect

Blue beam layer:

Overlay the blue beam by adding it on another layer because we want to see the blue beam.

slide65

If you tween the height of the blue beam (both the mask and the blue beam on the extra layer), then you get

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