GB/T 36341.1-2018 in English
VALIDInformation technology—Information representation of shape modeling—Part 1: Framework and basic component
- Issued on:2018-06-07
- Implemented on:2019-01-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
| Standard No: | GB/T 36341.1-2018 |
| Document status: | VALID |
| Title in English: | Information technology—Information representation of shape modeling—Part 1: Framework and basic component |
| Title in Chinese: | 信息技术 形状建模信息表示 第1部分：框架和基本组件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2018-06-07 |
| Implemented on: | 2019-01-01 |
| ICS Classification: | 35.140-Computer graphics |
| Chinese Classification: | L81-Computer graphic |
| Professional Classification: | GB-National Standard |
| Related Keywords: | shape representation technology continuous representation
information technology information representation shape modeling geometric shape + material/texture order ≤10 discrete representation |
| Related Topics: | modeling
Modeling Standard modeling+ GB/T 36341.1 GB/T 36341.1-2018 |
《GB/T 36341.1-2018信息技术 形状建模信息表示 第1部分：框架和基本组件》由TC28（全国信息技术标准化技术委员会）归口，TC28SC24（全国信息技术标准化技术委员会计算机图形图像处理及环境数据表示分会）执行，主管部门为国家标准化管理委员会。
Introduction
Analysis of the standard framework
GB/T 36341.1-2018 builds a four-layer architecture system for shape modeling: entity→feature constraint→streaming→storage format. Among them, the entity is the basic unit, which is composed of shape and attribute, forming the atomic component of the 3D model.
| Architecture hierarchy | Core functions | Technical indicators |
|---|---|---|
| Entity layer | Geometric shape + material/texture attributes | Support 12 types of basic geometric shapes |
| Feature constraint layer | Semantic structure verification | Constraints ≥ 3 types |
| Streaming transmission layer | Progressive data transmission | Support LOD grading |
Shape representation technology
Continuous representation of shape
Uses parametric mathematical description, including:
- Basic geometric bodies: 7 types including sphere/cylinder, with accuracy error ≤0.01mm
- Parametric curves and surfaces: 5 types of algorithms including Bezier/NURBS, supporting order ≤10
Discrete representation of shapes
Based on combination of discrete elements:
- Point cloud: single model supports ≥100 million points
- Subdivision surfaces: 4 subdivision rules including Catmull-Clark
Entity attribute specification
Texture mapping
Uses UV coordinate system (s, t∈[0,1]), supports multi-texture overlay. For example, the car model needs to map the paint texture and LOGO map at the same time.
Material Model
| Lighting Model | Core Parameters | Application Scenarios |
|---|---|---|
| Phong Model | Kd/Ks/Ns Coefficients | Real-time Rendering |
| PBR Model | BRDF Function | Film-level Rendering |
Implementation Suggestions
- Data Optimization: It is recommended to use T-spline for complex models, which can reduce storage space by 30%
- Precision control: NURBS curves are recommended for industrial design scenarios, and the recommended order is 4-6
- Compatibility: VR systems must support both polygonal meshes and subdivision surfaces
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