| 摘要: |
| 在有色调明暗变化的灰度图上叠加线框图的显示,有利于人们进行更好的观察.但已有的各种叠加方法均是依赖深度值比较进行操作的.它们不仅没有完全解决线框图显示时的断续现象,而且还会导致被遮挡面的线框也被显示的错误.对此,提出一种不进行深度值比较的方法.利用线框与面片的相关性及面片间的遮挡关系进行比较的操作,使得线框图不仅能得到高质量的叠加绘制,而且不必进行深度值的计算. |
| 关键词: 线框图,灰度图,叠加绘制,计算机图形学. |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到国家自然科学基金资助. |
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| A New Method for Overlay Rendering of Wireframes on Shaded Surfaces |
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WANG Wen-cheng,CHEN Yan-yun,WU En-hua
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| Abstract: |
| To take the merits of both wireframe and shaded surfaces, sometimes it is advantageous to combine them together in a single image. However, the combination would often lead to edge stitching and might draw edges that are hidden and the current methods have not so far completely solved the problems since they are mostly based on the Z-buffer comparison. A new method without Z-buffer comparison is presented in this paper. By this method, overlay of edges on shaded surfaces is realized by employment of the correspondence between edges and polygons as well as the hidden relation between polygons. Thus, the existing problems for wireframe overlaying shaded surfaces could be removed, and the calculation for depth values of edges may be saved. |
| Key words: Wireframe, shaded image, overlay, computer graphics. |
