在线的箭头指出了画线的方向。两种方式都会填入三个封闭的L形区域，号码从1到3。号码为4和5的两个小内部区域，在ALTERNATE方式下不会被填入。但是，在WINDING方式下，号码为5的区域会被填入，因为从区域内必须穿过两条相同方向的线才能到达图形外部。号码为4的区域不会被填入，因为必须穿过两条方向相反的线。



如果您怀疑Windows没有这么聪明，那么程序altwind会展示给您看

-Online draw of the arrow points out the direction of the line. Are two ways to fill the three closed L-shaped region, numbers from 1-3. Numbers 4 and 5 for two small internal region, in ALTERNATE mode will not be filled. However, in the manner WINDING, number 5 will be filled in the region, because the region must be from the same direction through the two lines to reach the external graphics. No. 4 will not be populated region, because of the need to pass through two lines of opposite direction. If you suspect that Windows is not so smart, then the process will be displayed to you altwind watch