Scripting

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What's this?

Scripting quick reference

SCRIPT (file format)

Doom 3

Doom 3 script events

Quake 4

Quake 4 script events

Prey

Prey script events

Scripting is a specific domain of programming. It focuses more on specifying what should be done instead of how. Mostly read by a script parser instead of being compiled to bytecode.

On the Doom 3 engine, it is used to allow mappers or modders to change behavior without recompiling the bytecode, only a map restart is needed to parse the script again.

1 Different fields
2 Definitions
3 Syntax
4 Related

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Different fields

The various forms of scripting in Doom 3 are:

Level scripting - Used for scripting events in levels.
Weapon scripting - Used for defining the behavior of weapons.
AI scripting - Used for defining the behavior of entities.
GUI scripting - Used for defining the behavior and appearance of game GUIs

Check out the separate topics to get more specific scripting info.

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Definitions

These definitions are related to scripting.

Script parser: The program reading a script file, here it is the Doom 3 engine.
Syntax: The rules defining a scripting language.
Keyword: Special word, reserved by the language to mark the start of a language construct.
Operator: Special symbol, reserved by the language to show what operation should be done.
Variable: A variable can be thought of as a named container used to store a value. It can only be of one data type at a time
Data type: See data types.
Function or method: A function is a structure to group commands so they can be reused later in the script. It is also possible to give it a return type and value.
Return value: Once a function has finished it's commands, it can return a result.
Return type: Defines the data type of the return value, must be given when defining a function
Object: An instance of a class in the game code. Some of these can be referenced from the script.
Event: Also called script event, these are the instructions you can ask an object to do.

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Syntax

To find out about script file syntax, see the .SCRIPT format reference.
If you want to start immediately, go read some tutorials on level scripting.
If you are looking for a more steady introduction to scripting, check out the scripting basics page.

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See also the editing of declarations, which is not exactly a part of scripting but an important part of editing for Doom 3 engine.