WPF C＃查找变换后的RectangleGeometry的角 [英] WPF C# Finding the corners of a transformed RectangleGeometry

问题描述

我正在尝试对将多个RenderTransforms推送到Canvas的DrawingContext中绘制的Rect进行命中测试。我对RectangleGeometry应用了相同的旋转/缩放/平移变换，以便获得最终图形的边界。但是，RectangleGeometry的.Bounds属性返回轴对齐的边界框，而我需要定向的边界框。

I'm trying to do some hit testing on a Rect I've drawn with several RenderTransforms pushed to the Canvas' DrawingContext. I've applied the same rotate/scale/translate transforms to a RectangleGeometry so I can get the bounds of the final drawing. However, the .Bounds property on RectangleGeometry returns the axis-aligned bounding box, while I need the oriented bounding box.

总之，我需要一些方法来找到角

In short, I need some way to find the corners of the actual transformed rectangle so I can perform hit/collision testing on it.

推荐答案

将变换应用于矩形的点

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