利用求补色立体图屏幕坐标原理，采用浮动水平线法来绘出空间曲面的透视投影图形。
Based on the screen coordinate theory of solid diagram of complementary color, a perspective projection diagram of space surface is drawn using floating horizontal line method.
论述三维立体图生成三面投影图的方法，解决在绘制投影图中的困难。
The method of three-planes projection graph created by 3D spatial graph is discussed. It solve the difficult in drawing projection graph.
论述三维立体图生成三面投影图的方法，解决在绘制投影图中的困难。
The method of three-planes projection graph created by 3D spatial graph is discussed. It solve the difficult in drawing projection graph.
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