Each point of the polygon is added to the temporary shape on line 23, and if it's the first point in the polygon, its location is recorded as the placement for the text annotating that piece.
Luckily, the vendor wisely put a mechanism in its software to affix a temporary resumption point to the batch where the interruption occurred.
幸运的是，聪明的供应商在它的软件中设定了一种机制，对这批中断的地方附加了临时恢复点。
3
This can be marginally more efficient than using a temporary variable and, by making the code terser, makes it either easier to read or more cryptic, depending on your point of view.