GB/T 28170.1-2011Information technology -- Computer graphics and image processing -- Extensible 3D (X3D) -- Part 1: Architecture and base component (English PDF)

Foreword

GB/T 28170 "Information technology computer graphics and image processing Extensible three-dimensional components (X3D)" is divided into two parts.

- Part 1. architecture and infrastructure components;

Part 2. Scenario Access Interface (SAI).

This part is part 1 of GB/T 28170.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part uses the translation method equivalent to the international standard ISO/IEC 19775-1.:2004 "Information Technology Computer Graphics and Imaging Office Extensible 3D Graphics (X3D) Part 1. Architecture and Fundamental Components.

This part also makes the following editorial changes.

--- "ISO/IEC 19775 this part" to "this part";

- to remove the preamble of international standards;

- other international standards cited in ISO/IEC 19775, have been adopted as our standard, with our standard instead of the corresponding International standards. The rest is not used as the international standard of our standard, in this part are directly quoted;

--- According to the format of GB/T 1.1-2009, the number of tables and figures are modified according to the order of tables and graphs in this section.

In this part of the normative reference to the international documents have a consistent correspondence between the following documents.

--- GB/T 2659-2000 Country and Region Name Codes (ISO 3166-1.:1997, EQV) GB/T 4880.1-2005 Language name code Part 1. 2 letter code (ISO 639-1.:2002, MOD) GB/T 4880.2-2000 Language name code Part 2. 3 letter code (ISO 639-2.:1998, EQV)

--- GB 13001.1-2010 Information technology Universal multi-octet character set (UCS) (ISO/IEC 10646-1.:2003, IDT)

--- GB/T 15121.1-1994 Information processing system Computer graphics storage and transmission of picture description information of the yuan Volume 1. Functional Description (ISO 8632-1. 1987, IDT)

--- GB/T 15121.3-1994 Information processing system Computer graphics storage and transmission of picture description information of the yuan Volume Part 3. Binary Encoding (ISO/IEC 8632-3.:1992, IDT)

--- GB/T 15121.4-1994 Information processing system Computer graphics storage and transmission of picture description information of the yuan Volume 4. Clear text encoding (ISO/IEC 8632-4.:1992, IDT) GB/T 15272-1994 Programming language C (ISO/IEC 9899.:1990, IDT) GB/T 18232-2000 Information technology - Computer graphics and image processing - Ranking of graphical items (ISO/IEC 9973.

1994, EQV)

Introduction

1 Scope

GB/T 28170 defines a software system that integrates 3D graphics and multimedia capabilities with network capabilities. Conceptually, every X3D the application is a time-base three-dimensional space, which consists of graphics and auditory objects that can be dynamically modified by a variety of mechanisms. This section defines X3D the architecture and the underlying components.

X3D semantics describes a time-based, three-dimensional interactive, multimedia information abstract function behavior. This section does not define physical settings or any other implementation-related concepts (such as screen resolution and input devices). This part is intended to be used as widely as possible Preparation and application, in the interpretation and implementation of the function as far as possible to provide a wide range. For example, this section does not assume a mouse or a two-dimensional display device Must exist.

X3D applies to.

a) implicitly create a world coordinate space for all defined objects and all the objects contained in the application;

b) Explicitly define and combine 3D objects and multimedia objects;

c) can be specified with other files or applications hyperlinks;

d) Define program-driven or data-driven object behavior;

e) can be connected to an external module or application via a programming language or scripting language;

f) Declaring a functional requirement by defining a configuration file;

g) Additional functional requirements can be declared by defining components.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 17191.1-1997 Information technology - Digital storage media with 1.5 Mbit/s data transfer rate Moving images and their companions Sound coding Part 1. System (idtISO /IEC 11172-1.:1993) GB/T 17555-1998 Information technology - Computer graphics and image processing - conformance testing of graphical standards (idtISO /IEC 10641.:1993) ISO 639-1.:2002 Language name code Part 1. 2 letter code (Codesfortherepresentationofnamesof languages-Part 1. Alpha-2code) ISO 639-2.:1998 Language name code Part 2. 3 letter code (Codesfortherepresentationofnamesof languages-Part 2. Alpha-3code) ISO 3166-1.:1997 Country and its subdivision name representation code Part 1. Country code (Codesfortherepresentation ofnamesofcountriesandtheirsubdivisions-Part 1. Countrycodes) ISO 3166-2.:1998 Country and its breakdown designations Part 2. Country codes (Codesfortherepresentationof namesofcountriesandtheirsubdivisions-Part 2. Countrysubdivisioncode) ISO 3166-3.:1999 Country and its subdivision name Representation Part 3 Construction code used before the name code (Codesforthe representationofnamesofcountriesandtheirsubdivisions-Part 3. Codeforformerlyusednamesof