| 圆球及阴影水平斜轴测投影的算法 |
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| 引用本文： | 罗敏雪,李冰.圆球及阴影水平斜轴测投影的算法[J].机械科学与技术(西安),2006,25(6):680-683. |
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| 作者姓名： | 罗敏雪 李冰 |
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| 作者单位： | [1]安徽建筑工业学院,合肥230022 [2]北京建筑工程学院,北京100044 |
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| 摘 要： | 在工程中,斜轴测图是很有用的。工程图学中,用传统的作图方法求圆球及阴影的水平斜轴测投影,只能在特殊光线方向下,用近似方法绘制,且作图非常麻烦。对于任意方向的光线,作图很难完成。本文给出了任定投影方向,任定光线方向,圆球及其阴影的水平斜轴测投影的算法。根据得到的公式编程序,用计算机绘圆球及其阴影的水平斜轴测图。
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| 关 键 词： | 圆球的阴影 水平斜轴测投影 光线方向 可见性判别 |
| 文章编号： | 1003-8728（2006）06-0680-04 |
| 收稿时间： | 2005-11-01 |
| 修稿时间： | 2005-11-01 |
Algorithm of Horizontal Obligue Axonometric Projection of Shade and Shadow on Spheric Surfaces |
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| Luo Minxue,Li Bing.Algorithm of Horizontal Obligue Axonometric Projection of Shade and Shadow on Spheric Surfaces[J].Mechanical Science and Technology,2006,25(6):680-683. |
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| Authors: | Luo Minxue Li Bing |
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| Affiliation: | 1 Anhui Institute of Architecture and Industry, Hefei 230022 ; 2 Beijing Institute of Architecture Enginnering, Beijing 100044 |
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| Abstract: | In engineering, oblique axonometric projection is useful. In engineering drawings, horizontal oblique axonometric projection of shade and shadow on spheric surfaces can be drawn only in special light ray directions and by approximate methods, causing great trouble. This paper discussed the algorithm of horizontal obligue axonometric projection of shade and shadow on spheric surfaces in light ray and projection directions. The formulae obtained from the algorith were written into computer programs and computers were used to do the projection. |
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| Keywords: | shade and shadow of spheric surface horizotal obligue axonometric projection light rays visibility |
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