我只是指这样一个事实，即检查偶数索引的凸出值是否为零并不意味着奇数索引的凸出值为非零，可能不是一个“陷阱”，但在处理逻辑表达式时肯定会忽略一些东西。
李，事实上事情是可以忽略的，我从自己的经历和测试中很好地理解。有时，我看不到非常明显或基本的东西，甚至对我来说。
现在伦敦是凌晨2点，不是吗？你睡觉吗？
当你需要他的时候，他的化身在哪里！？哈哈（我的时间上午12:50）
别担心。。。他会回来的。 I believe Irne has fallen for the 'trap' you noted in post #4 Paul, an XOR of the test for an even index value and straight line flag variable will still allow straight lines when the index is odd. :wink: The 'trap', if any, was unintentional. I was only talking about the bulge values and the last two in collected list (of bulge values) have to be both 0. Not the last two polyline segments.
I was just referring to the fact that checking whether the bulge value is zero for even indexes doesn't imply it is non-zero for odd indexes, maybe not a 'trap' but certainly something that could be overlooked when working with the logical expressions.
Lee, the fact that things can be overlooked, I understand very well from my own experience and testings. Sometimes, I don't see things that are very obvious or elementary, even to me.
It is 2AM in London now, isn't it? Do you sleep at all?
Where's ReMark's avatar when you need him!? LoL (12:50 AM my time)
Don't worry... He'll be back.
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