![]() ![]() This is the Main routine, which takes no arguments. Here is a simple example of Inform 6 source code. In other languages this would normally be implemented via inheritance. However, objects very frequently have attributes (boolean properties, such as scenery or edible) that are recognized by the Inform library. Because of this, many objects in Inform do not inherit from any class, other than the "metaclass" Object. Interactive fiction games typically contain many unique objects. Objects and classes can inherit from multiple classes. Later versions added support for class definitions and allowed objects to be members of classes. In early versions of Inform, objects were different from the notion of objects from object-oriented programming, in that there was no such thing as a class. All objects can hold other objects, so a livingroom object might hold an insurancesaleman object which is holding a briefcase object which contains the insurancepaperwork object. ![]() Typically, top level objects represent rooms and other locations within the game, which may hold objects representing the room's contents, be they physical items, non-player characters, the player's character, or background effects. Objects can be moved throughout the tree. Since the parent–child relationship is often used to represent location, an object which is the parent of another object is often said to "hold" it. Objects are maintained in an object tree which lists the parent–child relationships between objects. A key element of the language is objects. The Inform programming language is object-oriented and procedural. The Inform compiler generates files for the Z-machine or Glulx (also called story files) from Inform 6 source code. The name Inform also refers to the Inform programming language that the compiler understands.Īlthough Inform 6 and the Z-Machine were originally designed with interactive fiction in mind, many other programs have been developed, including a BASIC interpreter, a LISP tutorial (complete with interpreter), a Tetris game, and a version of the game Snake. The Inform 6 system consists of two major components: the Inform compiler, which generates story files from Inform source code, and the Inform library, a suite of software which handles most of the difficult work of parsing the player's text input and keeping track of the world model. Over the following decade, version 6 became reasonably stable and a popular language for writing interactive fiction. In 1996 Nelson rewrote Inform from first principles to create version 6 (or Inform 6). Inform was originally created by Graham Nelson in 1993. Early release of Inform 7 did not support Glulx, but in August 2006 Glulx support was released. Starting with Inform 6.3, released February 29, 2004, Inform 6 has included official support for both virtual machines, based on Andrew Plotkin's work. Originally Inform targeted the Z-machine only.Īndrew Plotkin created an unofficial version of Inform 6 that was also capable of generating files for Glulx, a virtual machine he had designed to overcome many of the limitations of the several-decades-old Z-machine. Because there is at least one such interpreter for nearly every major and minor platform, this means that the same Z-code file can be run on a multitude of platforms with no alterations. The Z-machine was originally developed by Infocom in 1979 for their interactive fiction titles. Glulx, which can support larger games, is the default. The Inform compilers translate Inform code to story files for Glulx or Z-code, two virtual machines designed specifically for interactive fiction. In 2006, Nelson released Inform 7 (briefly known as Natural Inform), a completely new language based on principles of natural language and a new set of tools based around a book-publishing metaphor. Around 1996, Nelson rewrote Inform from first principles to create version 6 (or Inform 6). Versions 1 through 5 were released between 19. Inform can generate programs designed for the Z-code or Glulx virtual machines. Inform is a programming language and design system for interactive fiction originally created in 1993 by Graham Nelson. Microsoft Windows, Mac OS X, Linux, others ![]()
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