GB/T 36341.2-2018 English PDF

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GB/T 36341.2-2018: Information technology -- Information representation of shape modeling -- Part 2: Feature constraint
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Basic data

Standard ID: GB/T 36341.2-2018 (GB/T36341.2-2018)
Description (Translated English): Information technology -- Information representation of shape modeling -- Part 2: Feature constraint
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L81
Classification of International Standard: 35.140
Word Count Estimation: 14,178
Date of Issue: 2018-06-07
Date of Implementation: 2019-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 36341.2-2018: Information technology -- Information representation of shape modeling -- Part 2: Feature constraint

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Information technology--Information representation of shape modeling--Part 2. Feature constraint ICS 35.140 L81 National Standards of People's Republic of China Information technology shape modeling information representation Part 2. Feature Constraints Part 2. Featureconstraint Published on.2018-06-07 2019-01-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Features 1 4.1 Basic requirements 1 4.2 Feature Elements 2 4.3 Feature Combination 2 5 Feature Constraints 2 5.1 coincidence constraint 2 5.2 Overlap constraint 2 5.3 Concentric Constraints 3 5.4 Same size constraint 3 5.5 Connection Constraints 4 5.6 Coaxial constraint 4 5.7 Colinear constraint 5 5.8 Coplanar Constraint 5 5.9 Tangency constraint 6 5.10 line parallel constraint 7 5.11 plane parallel constraint 7 5.12 Vertical Constraint 8 5.13 Distance constraint 8 5.14 Length Constraint 9 5.15 Angle Constraint 9 5.16 mirror symmetric constraint 10

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. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This part is proposed and managed by the National Information Technology Standardization Technical Committee (SAC/TC28). This section drafted by. Tsinghua University, Peking University, China Electronics Technology Standardization Institute, Beijing University of Aeronautics and Astronautics, Zhejiang University, University of Science and Technology of China, Zhejiang University of Science and Technology, Shandong University, Beijing Normal University, Hangzhou Normal University, Xi'an University of Technology. The main drafters of this section. Yan Junhai, Wang Guoping, Wang Cong, Ma Shanshan, Yang Zhuangyuan, Zhang Hui, Wu Zijian, Ning Tao, Gao Yuming, Yang Zhouwang, Yan Yongwei, Meng Xiangxu, Yang Yijun, Wang Wei, Wu Zhongke, Liu Fuchang, Wang Yinghui. Information technology shape modeling information representation Part 2. Feature Constraints

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 article. Pieces. 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 feature A structure with specific semantics on points, lines, faces, and combinations thereof. 3.2 Feature element featureelement 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 featureconstraint A specific requirement that one or more attributes of one or more features need to satisfy. 3.5 Constraint representation constraintrepresentation A representation that satisfies a certain geometric relationship between one or more features included in the constraint.

4 characteristics

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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