如何得到PainterPath和QLineF的所有交点 [复制链接]

在一个PainterPath中加入了一些曲线，想得到曲线跟另外一条直线的交点，试了一下PainterPath的intersected函数，取不到，不知道有没有别的方法

Step A, intersected(...) find out all of the focal points
Step B, elementCount() num of points
Step C, traversal all the points by elementAt(int)

引用第1楼yooi于2009-03-17 13:23发表的  :
Step A, intersected(...) find out all of the focal points
Step B, elementCount() num of points
Step C, traversal all the points by elementAt(int)

thank you for your answer. But i does not work. I put  the line into another PainterPath and use intersected() function, but the PainterPath which is returned by intersected() function is always empty. Do you have other ideas?

an interesting phenomena is that the intersects() function returns true if i call it. I cannot understand ???!!!

……
my god, why should we communicate with each other in English?

实在不好意思，1楼回帖写的英语，也就跟着来了。
目前这个问题还是没有得到解决，期待回复。。。。。。