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. In orthographic projection of points on the process of projection, the same width of the projection line can be used 45 ° auxiliary line to complete the drawing simple and convenient, but because of the subsequent part no longer use the dot and projection axis can not directly draw 45 ° Auxiliary lines make this a quick and easy way to effectively exploit.With a simple and straightforward way to make a wide equalization using 45 ° lines even without an axis and an origin, Proper and easy to use projection images.