45°辅助线在无轴投影图中的应用

Application of 45° Auxiliary Line in Projection Map without Shaft

在用正投影法对点的投影过程中,宽相等的投影线可以利用45°辅助线来完成,作图简单方便,但由于后续部分不再使用圆点及投影轴,无法直接绘出45°辅助线,使得这种简单快捷的方法不能有效地得以进一步利用.用一种即便没有轴线和原点,也可以利用45°辅助线实现宽相等作图的简便方法,使45°辅助线在无轴投影图中一样正确轻松使用.

The projective lines with same width can be drawn easily by using 45° auxiliary line in projection process of dot by orthography.But the 45° auxiliany can＇t be drawn directively for dot and projection axis no longer use in follow up drawing.A method which can finish drawing easily by using 45° auxiliary line without coordinate axis was put forward.