Director and Lingo Terminology

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Terminology

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Types of Scripts

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Syntax
     

Director Terms

AIFF
standard sound format for application information exchange

Bit Depth
the number of bits per pixel that is displayed on screen

Anti-Aliasing
the smoothing of the jagged edges of a graphic

Film Loop
a group of cast members used as a single cast member

Cast members
characters used in a movie

The Stage
the visible part of a director movie or application
Sprite
one instance of one cast member on stage at one particular time
Keyframe
represented in the Score by a small circle—is a frame in which you specify or change the properties of a sprite.
Tweening
is a traditional animation term that describes the process in which a lead animator draws the animation frames where major changes take place, called keyframes. Assistants draw the frames in between.
The terms keyframe and tweening are not specific to Director; they're standard animation terms. In traditional animation, a lead animator draws the most important frames (the key frames) in a sequence, and an assistant animator draws the frames in between. The assistant animator's job became known as in-betweening, which eventually got shortened to tweening.

Lingo Terms

Like any programming language, Lingo uses specific terminology and has rules of grammar and punctuation that you must follow. This information is summarized in this section.

Important Lingo terms are listed here in alphabetical order. References are included for terms that are discussed in more detail elsewhere in this chapter.

Arguments (or parameters), are placeholders that let you pass values to scripts (see Using arguments to pass values to a handler). For example, the following handler, called addThem, adds two values it receives in the arguments a and b.

on addThem a, b
   c = a + b
end

Commands are terms that instruct a movie to do something while the movie is playing. For example, go to sends the playback head to a specific frame, a marker, or another movie.

Constants are elements that donŐt change. For example, the constants TAB, EMPTY, and RETURN always have the same meaning.

Events are actions that occur while a movie is playing. For example, when a movie stops, a sprite starts, the playback head enters a frame, or the user types at the keyboard, these actions are events.

Expressions are any part of a statement that produces a value. For example, 2 + 2 is an expression.

Functions are terms that return a value. For example, the date() function returns the current date set in the computer. The key() function returns the key that was pressed last. Parentheses occur at the end of a function.

Handlers are sets of Lingo statements within a script that run when a specific event occurs in a movie (see Using handlers). For example, the following statements comprise a handler that plays a beep sound when the mouse is clicked:

on mouseDown
  beep
end

Keywords are reserved words that have a special meaning. For example, end indicates the end of a handler.

Lists are ordered sets of values used to track and update an array of data, such as a series of names or the values assigned to a set of variables (see Using lists). A simple example is a list of numbers such as [1, 4, 2].

Messages are notices that Director sends to scripts when specific events occur in a movie (see Using messages to identify events). For example, when the playback head enters a specific frame, the enterFrame event occurs and Directors sends an enterFrame message. If a script contains an on enterFrame handler, the statements within that handler will run, because the handler received the enterFrame message.

Operators are terms that calculate a new value from one or more values. For example, the addition (+) operator adds two or more values together to produce a new value.

Puppets are elements that are totally under control of lingo.

Properties are attributes that define an object. For example, picture is a property of a bitmap cast member.

Scripts are sets of instructions that tell Director to perform certain tasks while a movie is running.

Statements are valid instructions that Director can execute (see Writing Lingo statements). For example, go to frame 23 is a statement.

String a group of characters meant to be taken for their literal value.

Variables are elements used to store and update values (see Storing and updating values in variables). To assign values to variables or change the values of many properties, you use the equals (=) operator or the set command. For example, the statement set startValue = 0 places a value of 0 into a variable named startValue.