
Gradients are applied to fill objects. Fill options include solid color, linear gradient, radial gradient or bitmap. Linear and radial gradients can be made up of just two endpoint colors, or a whole range of colors. Each color in the gradient can have its transparency (alpha) set anywhere between 0 and 100%. If several gradients are to be used in a movie, it's often a good idea to open both the swatch panel (where solid colors and gradients may be saved) and the color mixer (where gradients are created/edited). In the picture above, they are open and docked to the right of the stage.
A gradient is defined in the color mixer panel and applied with the paint bucket tool (or automatically if the object is already selected and the fill is changed in the color mixer). Select linear or radial from the dropdown box in the Color Mixer. The gradient bar will appear with two endpoints. More color points may be added by clicking along the gradient bar, or removed by dragging them away. The color of each point may be specified by clicking on it doing any of the following:
To save a gradient swatch, just click in the bottom row of the Color Swatches panel.
Once
a gradient has been applied to a fill object, its size and/or orientation
may be changed with the fill transform tool (the blue gradient rectangle with
arrows over it, circled in yellow at left). Select the fill transform tool,
click the gradient on stage, and symbols like those in the picture above will
appear. Their functions (rotate, size, move center) are as marked.
Discussed on this page:
color mixer for creating gradients, editing gradients in Flash IDE
Student examples
Here's a nice example by Memo Saenz of a linear gradient used to make an evening sky and radial gradients used within star shapes (and some keyframe animation applied to the stars).
Other Resources
VectorKid (Robert Firebaugh) is an absolute master of using gradients in Flash to create photorealistic effects. The tomato and gel button tutorials are especially good examples to follow.
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You can also buy his book, Illustrating With Macromedia Flash 2004, at Amazon: