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期刊论文

Technical illustration based on 3D CSG models*

耿卫东耿卫东†丁磊余宏锋潘云鹤†

Geng et al./J Zhejiang Univ SC1 2005 6A (5): 469-475,-0001,():

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摘要/描述

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 C SG 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 & multi-level lighting intensities, parametric spatial occupations for each lighting level, and an interpolation method to calculate the lighting distribution over primitives. The stylized illustration is simulated by a grid-based method, in which we "fill" the desirable pictorial 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.

版权说明:以下全部内容由耿卫东上传于   2010年06月02日 09时52分54秒,版权归本人所有。

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