| Technical illustration based on 3D CSG models |
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| 作者姓名： | 耿卫东 丁磊 余宏锋 潘云鹤 |
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| 基金项目： | 国家自然科学基金，the Returnee Foundation of Education Ministry of China Zhejiang Province |
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| 摘 要： | Non-photorealistic rendering (NPR) is effective at conveying information, more expressive or more beautiful than its photorealistic counterparts (Lans-down and Schofield, 1995). Technical illustration is a special subset of NPR since both of them share human perception as common driving force. NPR aims at rendering 3D objects to convey engineering informa-tion, and is very popular in engineering drawing. Many researchers had investigated its application for technical illustration. Gooch e…
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| 关 键 词： | 技术图表 3D模型 CAD 计算机辅助设计 NPR |
Technical illustration based on 3D CSG models |
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| Geng Wei-dong,Ding Lei,Yu Hong-feng,Pan Yun-he.Technical illustration based on 3D CSG models[J].Journal of Zhejiang University Science,2005,6(5):469-475. |
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| Authors: | Geng Wei-dong Ding Lei Yu Hong-feng Pan Yun-he |
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| Institution: | (1) Stake Key Lab of CAD & CG, School of Computer Science, Zhejiang University, 310027 Hangzhou, China |
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| Abstract: | This paper presents an automatic non-photorealistic rendering approach to generating technical illustration from 3D models. It first decomposes the 3D object into a set of CSG primitives, and then performs the hidden surface removal based on the prioritized list, in which the rendition order of CSG primitives is sorted out by depth. Then, each primitive is illustrated by the pre-defined empirical lighting model, and the system mimics the stroke-drawing by user-specified style. In order to artistically and flexibly modulate the illumination, the empirical lighting model is defined by three major components: parameters of multi-level lighting intensities, parametric spatial occupations for each lighting level, and an interpolation method to calculate the lighting units into the spatial occupation of CSG primitives, instead of"pixel-by-pixel" painting. This region-by-region shading facilitates the simulation of illustration styles. |
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| Keywords: | Non-photorealistic rendering (NPR) Technical illustration Expressive rendering CAD |
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