Extensible 3D (X3D)
Part 1: Architecture and base components
3 Definitions, acronyms, and abbreviations
3.1 条款ISO/IEC 19775此部分使用以下定义。
创作X3D 文件 的人或代理。
参见 生成器。
沿指点设备的方向穿过指针 位置的一条直线
节点 that may have many 实例 in a scene graph but only one instance may be active at any instant of time
a computer program that interprets X3D 文件, presents their content to a 用户 on a display device, and allows the 用户 to interact with worlds defined by X3D 文件 by means of a 用户 interface
nodes defined using the prototyping mechanism that are understood only by certain 浏览器
a node of a type explicitly defined in this part of ISO/IEC 19775
a function defined in a scripting language to which events are passed
an instance of a children node
one of a set of node types, 实例 of which can be collected in a group to share specific properties dependent on the type of the grouping node
a computer system, attached to a 网络, that relies on another computer (the server) for essential processing functions
a node used as a substitute for all of a Collision node's children during collision detection
characterization of a colour space in terms of explicit parameters
the process of identifying objects or parts of objects which do not need to be processed further by the 浏览器 in order to produce the desired view of a world
a node which descends from another node in the transformation hierarchy (a children node)
a graphics device on which X3D worlds may be rendered
a pointing device sensor that causes events to be generated in response to sensor-dependent pointer motions
a sensor node that generates events based on the location of the viewpoint in the world or in relation to objects in the world
a message sent from one node to another as defined by a route
A sequence of 事件 initiated by a script or sensor event and propagated from 节点 to node along one or more 路由 all of which are considered to have occurred simultaneously
the rules governing how 事件 are processed by 浏览器 and scripts
a field that is capable of receiving 事件 via an eventIn to change its value(s), and generating events via an eventOut when its value(s) change
a prototype defined in an external file and referenced by a URL
a property or attribute of a node
the identifier of a field
a single rendering of a world on a display device or a single time-step in a simulation
a computer program which creates X3D 文件
a node defining the properties of a specific geometry node
a node containing mathematical descriptions of three-dimensional (3D) points, lines, surfaces, text strings and solids
receive events from activated pointing devices
one of a set of node types which include a list of nodes, referred to as its children nodes
a two-dimensional (2D) rectangular array of pixel values
the mechanism by which one X3D file is hierarchically included in another
命名并定义过节点 的引用
a node that defines a piece-wise linear interpolation
a private 网络 that uses the same protocols and standards as the Internet
the amount of detail or complexity which is displayed at any particular time for any particular object
a linefeed character (0x0A) and/or a carriage return character (0x0D)
a sequence of events which would result in a specific event generator sending more than one event with the same timestamp
an integrated presentation, typically on a computer, of content of various types, such as computer graphics, audio, and video
set of interconnected computers
构成the fundamental component of a 场景图
a characteristic of each 节点 that describes, in general, its particular semantics
a collection of data and procedures, packaged according to the rules and syntax defined in this part of ISO/IEC 19775. "Object" is usually synonymous with node.
a background texture that is placed behind all geometry in the scene and in front of the ground and sky
a 节点 which is an instance of a 组节点
a location and direction in the 虚拟境界 defined by the 指点设备 with which the 用户 is currently interacting with the virtual world
a hardware device connected to the 用户 computer by which the 用户 directly controls the location and direction of the 指针
a sensor 节点 that generates 事件 based on 用户 actions, such as 指点设备 motions or button activations
分段的线
a named collection of criteria for functionality and conformance that defines an implementable subset of a standard
definition of a new 节点类型 in terms of the 节点 defined in this part of ISO/IEC 19775
the mechanism for extending the set of 节点类型 from within a X3D文件
the connection between a 节点 generating an 事件 and a node receiving the event
an ordered collection of 组节点 and other nodes
a set of procedural functions normally executed as part of an event cascade
the process of creating or referring to a script
a system of syntactical and semantic constructs used to define and automate procedures and processes on a computer
a 节点 that enables the 用户 to interact with the 境界 in the scene graph hierarchy
a UTF-8 character used to separate syntactical entities in an X3D文件
a 点 which shares a 父 with other nodes
the smallest time unit capable of being identified in a digital simulation of analog time
a grouping node that exhibits special behaviour (e.g., Switch or LOD)
an image used in a texture map to create visual appearance effects when applied to geometry nodes
the set of coordinates used to map a texture to geometry
a monotonically increasing value generated by a node
that part of an event that describes the time the event occurred and that caused the message to be sent
the subset of the 场景图 consisting of 节点 that have well-defined coordinate systems
a section of a PNG file containing transparency information (derived from 2.[I15948])
to process the 节点 in a 场景图 in the correct order
a person or agent who uses and interacts with X3D文件 by means of a 浏览器
a location, direction, and viewing angle in a 虚拟境界 that determines the portion of the virtual world presented by the 浏览器 to the 用户
参见 境界.
One or more consecutive occurrences of a separator character
a collection of one or more X3D文件 and other multimedia content that, when interpreted by a X3D浏览器, presents an interactive experience to the 用户 consistent with the 作者 intent
the coordinate system in which each X3D 境界 is defined
参见 浏览器.
a computer program that locates and transmits X3D 文件 and supporting files in response to requests from 浏览器
根据 ISO/IEC 19775定义的一系列的节点和语句
the plane perpendicular to the Z-axis that passes through the point Z = 0.0
the plane perpendicular to the X-axis that passes through the point X = 0.0
the plane perpendicular to the Y-axis that passes through the point Y = 0.0
3.2 Acronyms and abbreviationsFor the purposes of this part of ISO/IEC 19775, the following expansion of acronyms and abbreviations apply:
Hue, Saturation, and Value colour model. See E.[FOLE].
HyperText Markup Language (see 2.[HTML])
Joint Photographic Experts Group (see 2.[JPEG])
Musical Instrument Digital Interface. A standard for digital music representation (see 2.[MIDI])
Multipurpose Internet Mail Extension (see 2.[RFC2077])
Moving Picture Experts Group (see 2.[I11172-1])
Portable 网络 Graphics. A specification for representing two-dimensional images in files. See 2.[I15948].
the colour model used within ISO/IEC 19775 for the specification of colours.
Relative Uniform Resource Locator. See 2.[RFC1808].
Universal multiple-octet coded Character Set. See 2.[I16262].
Uniform Resource Locator. See 2.[RFC1738].
Universal Resource Name. See 2.[RFC2141].
the character set used to encode X3D 文件 defined as the 8-bit UCS Transformation Format specified in 2.[I16262].
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