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Using Dynamic Layers 433
Animation tips for timelines
The following suggestions can improve the performance of your animations and
make creating animations easier:
•
Show and hide layers instead of changing the source file for multiple-image
animations. Switching the source file of an image can slow down the
animation, because the new image must be downloaded. There will be no
noticeable pauses or missing images if all images are downloaded at once in
hidden layers before the animation runs.
•
Extend animation bars to create smoother motion. If animation looks
choppy and images jump between positions, drag the end frame of the
layer’s animation bar to extend the motion over more frames. Making the
animation bar longer creates more data points between the start and end
point of the movement and also makes the object move more slowly. Try
increasing the number of frames per second (fps) to improve speed, but be
aware that most browsers running on average systems cannot animate much
faster than 15 fps. Test the animation on different systems with different
browsers to find the best settings.
•
Don’t animate large bitmaps. Animating large images results in slow
animations. Instead, create composites and move small parts of the image. For
example, show a car moving by animating only the wheels.
•
Create simple animations. Do not create animations that demand more than
current browsers can provide. Browsers always play every frame in a timeline
animation, even when system or Internet performance decreases.