Information technology —
Computer graphics and image processing —
Extensible 3D (X3D)
Part 1: Architecture and base components

1 Scope

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ISO/IEC 19775, X3D, defines a software system that integrates network-enabled 3D graphics and multimedia. Conceptually, each X3D application is a 3D time-based space that contains graphic and aural objects that can be dynamically modified through a variety of mechanisms. This part of ISO/IEC 19775 defines the architecture and base components of X3D.

The semantics of X3D describe an abstract functional behaviour of time-based, interactive 3D, multimedia information. ISO/IEC 19775 does not define physical devices or any other implementation-dependent concepts (e.g., screen resolution and input devices). ISO/IEC 19775 is intended for a wide variety of devices and applications, and provides wide latitude in interpretation and implementation of the functionality. For example, ISO/IEC 19775 does not assume the existence of a mouse or 2D display device.

Each X3D application:

  1. implicitly establishes a world coordinate space for all objects defined, as well as all objects included by the application;
  2. explicitly defines and composes a set of 3D and multimedia objects;
  3. can specify hyperlinks to other files and applications;
  4. can define programmatic or data-driven object behaviours;
  5. can connect to external modules or applications via programming and scripting languages;
  6. explicitly declares its functional requirements by specifying a profile;
  7. can declare additional functional requirements by specifying components.

Part 1 of this specification describes the abstract functional behavior of the X3D system. Part 2 describes the application programmer interfaces (APIs) used to dynamically modify the X3D scene and integrate with external applications. Part 3 specifies various data encoding formats for storing X3D scenes.

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