GB/T 36341.2-2018Information technology—Information representation of shape modeling—Part 2: Feature constraint (English PDF)
信息技术 形状建模信息表示 第2部分：特征约束
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 7, 2018
Implementation date
January 1, 2019
Scope
GB/T 36341.2-2018 is the English-translated version of 信息技术 形状建模信息表示 第2部分：特征约束.
GB/T 36341.2-2018 is Part 2 of the Chinese national series on the information representation of shape modeling, and deals with features and feature constraints.
It sets the basic requirements for a feature, made up of feature elements, a feature description and a feature identifier, and covers feature elements and feature combinations.
It then specifies sixteen kinds of feature constraint: coincidence, overlap, concentric, same size, connection, coaxial, collinear, coplanar, tangency, line parallel, plane parallel, vertical, distance, length, angle and mirror symmetric constraints.
It applies to 3D models in CAD, 3D animation, virtual, augmented and mixed reality, 3D digital medicine, 3D digital entertainment and e-commerce, and relies on the framework of GB/T 36341.1. It was issued on 7 June 2018 and has applied since 1 January 2019.
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Document preview — GB/T 36341.2-2018
National Standard of the People's Republic of China
- ICS
- 35.140
- Classification
- L 81
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Features
- 4.1 Basic requirements
- 4.2 Feature Elements
- 4.3 Feature Combination
- 5 Feature Constraints
- 5.1 coincidence constraint
- 5.2 Overlap constraint
- 5.3 Concentric Constraints
- 5.4 Same size constraint
- 5.5 Connection Constraints
- 5.6 Coaxial constraint
- 5.7 Colinear constraint
- 5.8 Coplanar Constraint
- 5.9 Tangency constraint
- 5.10 line parallel constraint
- 5.11 plane parallel constraint
- 5.12 Vertical Constraint
- 5.13 Distance constraint
- 5.14 Length Constraint
- 5.15 Angle Constraint
- 5.16 mirror symmetric constraint
Foreword
GB/T 36341 "Information Technology Shape Modeling Information Representation" is divided into four parts.
--- Part 1. Framework and basic components;
--- Part 2. Feature constraints;
--- Part 3. Streaming;
--- Part 4. Storage format.
This part is the second part of GB/T 36341.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This part of GB/T 36341 specifies the features used in the representation of the shape modeling information and their characteristic constraints.
This section applies to CAD, 3D animation, virtual reality, augmented reality or mixed reality, 3D digital medicine, 3D digital entertainment, electricity The shape modeling information representation, design, development and application of 3D models in fields such as sub-commerce.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 36341.1 Information technology shape modeling information representation Part 1. Framework and basic components
3 Terms and definitions
The following terms and definitions as defined in GB/T 36341.1 apply to this document.
3.1 Feature
A structure with specific semantics on points, lines, faces, and combinations thereof.
3.2 Feature element
Shape points, lines, faces, and combinations thereof associated with features.
3.3 Feature description
Relevant semantic descriptions of feature elements and feature combinations may include numerical, geometric, text, image, video and other characteristics.
3.4 Feature constraint
A specific requirement that one or more attributes of one or more features need to satisfy.
3.5 Constraint representation
A representation that satisfies a certain geometric relationship between one or more features included in the constraint.
4 Features
4.1 Basic requirements
The features defined in this section provide a representation of a particular semantic part of a body representation. Each feature consists of feature elements and features The description and a feature identifier are composed of three parts.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 36341.1-2018 — Information technology—Information representation of shape modeling—Part 1: Framework and basic component
GB/T 36341.3-2018 — Information technology—Information presentation of shape modeling—Part 3: Streaming transmission
GB/T 36341.4-2018 — Information technology—Information presentation of shape modeling—Part 4: Storage format
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GB/T 36341.2-2018
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