Apple Shake 4 Tutorials Instrukcja Użytkownika Pobierz pdf (Strona 230)

230 Chapter 8 Working With Macros

The text in your editor is raw script, meaning it is not formatted as a macro. If you paste

it back in, you get three more nodes. You need to format the text as a single function—

a macro.

7 Delete the layout information—that is, everything in the text editor window including

and below the “User interface settings” line.

These lines tell Shake where to place the nodes if you paste them back in again. You do

not need the lines, so remove them.

You are left with this:

Rotate1 = Rotate(0, -Rotate2.angle, 1, width/2, height/2, 0, 0.5, 0);

Blur1 = Blur(Rotate1, 200, 0, 1, "gauss", xFilter, "rgba");

Rotate2 = Rotate(Blur1, -36.9218, 1, width/2, height/2, 0, 0.5, 0);

The left side of the argument supplies a variable name. In the above example, there are

three variables: Rotate1, Blur1, and Rotate2. These are assigned to Shake functions, the

Rotate and the Blur functions. (Inside the Shake interface, these are referred to as

“nodes.” Inside a script, they are referred to as “functions,” as you can have other types

of functions.) Next are the values for the functions. The first argument is generally the

incoming image, so you can see that the incoming image for Blur1 is the result of the

first Rotate function, Rotate1. Rotate1 has a value of 0 as the incoming image—there is

no expected input. If you look these functions up in the documentation, you find the

scripting format for each function.

If you change the variable names Rotate1, Blur1, and Rotate2, you must modify every

reference to them.

The following is used as an example only (it is not a step in the tutorial):

Marshall = Rotate(0, -Holly.angle,1, width/2, height/2, 0, .5, 0);

Will = Blur(Marshall, 200, 0, 1, "gauss", xFilter, "rgba");

Holly = Rotate(Will, 42.61728, 1, width/2, height/2, 0, 0.5, 0);

Notice how the strings “gauss” and “rgba” are in quotation marks because they are

strings, meaning letter data rather than numeric data. Compare these to what you see in

the interface parameters tab to get an idea of how Shake saves its parameters in a script.

Starting the Macro Format

Next, add some formatting. You must declare the type of the macro—if the macro spits

out an image, an integer (int), a number with decimal place (float), or a word (string).

Because this macro modifies an image, it needs to return an image. After that, add the

macro name. In this case, name the macro RotateBlur, capitalizing each word for

consistency.

Also, include two sets of parentheses. Incoming variables are placed in the first set, and

the second set {the braces} surrounds the body of the macro.

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