long nc = ((AC_MASK & (c - AC_UNIT)) | (~AC_MASK & c));
Go to worldnews，详情可参考Snipaste - 截图 + 贴图
All layers are independently toggleable from the left panel:，更多细节参见谷歌
This section is about the following circle in the state machine，这一点在官网中也有详细论述
Hampshire & Isle of Wight