Apple Motion 2 Tutorials Manual do Utilizador descarregar pdf (Página 186)

186 Tutorial 4 Working With Particles

Now some of the butterflies are larger than 60 percent, and some are smaller.

Although the butterfly clip is only 40 frames long, the particle system’s duration is

determined by the length of the project. The Life parameter determines the duration of

individual particles.

5 Play the project.

6 Save your project (press Command+S).

Using Custom Gradients

The default colors of the butterflies do not match the background. Use the gradient of

the Sky object as the gradient for the Color Over Life parameter of the particles. This

can be accomplished in one of two ways: by saving the gradient used in the Sky object

as a custom gradient, and then applying it to the particle system; or by picking the

colors from the background in the same manner as Exercise 1.

In this lesson, save the shape’s gradient to the Library and apply it to the butterfly cells.

Change the color properties of the butterflies to better integrate them with the

project’s background.

To modify the colors:

In the Emitter tab, choose Over Life from the Color Mode pop-up menu.

Over Life applies a color tint to a particle during its lifetime, beginning with the color

on the left side of the color bar, and ending with the color on the right.

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Apple Motion 2 Tutorials Manual do Utilizador Página 186