如何测试与QGraphicsPathItem轮廓的接近程度？

Question

我正在尝试测试给定点(x, y)是否位于或接近a 的轮廓QGraphicsPathItem.

使用QGraphicsItem.contains()或.collidesWithItem() / Path()不执行:如果点包含在路径内部的区域内,那些也会返回True,而我只想测试轮廓上的点.我怎么能做到这一点？

Answer 1

发布问题后我找到了以下解决方案：

    path = QPainterPath(...)   # Path we are testing against
    point = QPointF(...)       # Current position

    stroker = QPainterPathStroker()
    stroker.setWidth(10)        # Distance which we consider "on" the path 
    stroke = stroker.createStroke(path)

    if stroke.contains(point):
        # point is on path