关键词: 移动终端, 三维CAD模型, 面片生成, 分类树, 规模系数

Abstract: To improve the display efficiency in the mobile terminal and the display accuracy of model detail, this paper proposes a novel algorithm for 3D CAD model patch generation based on type hierarchy and object graph element. By extracting the database information such as the type and shape attributes of models, 3D CAD models are represented by shape classification tree. The scale coefficient is estimated by 0-1 normalization method for classification tree node of interactive selection. After estimating the scale coefficient, the display accuracy of the model is confirmed and 3D CAD model patch is generated. Finally, this paper proposes a 3D CAD model display system in mobile terminal, and carries out the experiments on 3D CAD model patch generation. The experimental results prove the feasibility and effectiveness of this 3D CAD model patch generation method.

Key words: mobile terminal, 3D CAD model, patch generation, classification tree, scale coefficient