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The Algorithm of Horizotal Obligue Axonometric Projection of Shade and Shadow on Spheric Surface
Author(s): 
Pages: 16-19
Year: Issue:  2
Journal: JOURNAL OF HEFEI UNIVERSITY(NATURAL SCIENCES)

Keyword:  圆球的阴影水平斜轴测图光线方向可见性判别;
Abstract: 目前的绘图软件不能绘制斜轴测图.在工程图中,斜轴测图是很有用的.用传统的手工作图方法绘圆球及阴影的水平斜轴测图,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.给出了用计算机绘制在任定投影方向,任定光线方向下,圆球及其阴影的水平斜轴测图的方法;并讨论其阴线可见性的分界点和阴线可见部分的判断方法.
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