| 由圆平面与投影面间夹角画椭圆 |
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| 引用本文： | 罗华灼.由圆平面与投影面间夹角画椭圆[J].广东工业大学学报,1988(2). |
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| 作者姓名： | 罗华灼 |
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| 作者单位： | 广东工学院基础部 |
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| 摘 要： | 圆之正投影是正椭圆,本文论述直接由圆平面与投影面间夹角,画出椭圆之作图法及其证明.
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| 关 键 词： | 正投影 二面角 椭圆 迹线 长轴 短轴 |
DRAWING AN ELLIPSE WITH THE HELP MEANS OF DIHEDRAL ANGLE FORMED BY THE PLANE ON WHICH THE CIRCLE RESTS AND THF PROJECTION PLANE |
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| Luo Huazhuo.DRAWING AN ELLIPSE WITH THE HELP MEANS OF DIHEDRAL ANGLE FORMED BY THE PLANE ON WHICH THE CIRCLE RESTS AND THF PROJECTION PLANE[J].Journal of Guangdong University of Technology,1988(2). |
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| Authors: | Luo Huazhuo |
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| Affiliation: | Luo Huazhuo Department of Basic courses GDIT |
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| Abstract: | The orthographic projection of a circle is an ellipse in general. Elliptical construction can be done by making use of a dihedral angle between the plane on which the circle rests and the projection plane, validity has been discussed in this paper, |
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| Keywords: | Orthograpic Projection dihedral ellipse trace major axis minor axis |
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