Asked • 07/27/19

Check if a point is in a rotated rectangle (C#)?

I have a program in C# (Windows Forms) which draws some rectangles on a picturebox. They can be drawn at an angle too (rotated). I know each of the rectangles' start point (upper-left corner), their size(width+height) and their angle. Because of the rotation, the start point is not necessarely the upper-left corner, but that does not matter here. Then when I click the picturebox, I need to check in which rectangle (if any) I have clicked. So I need some way of checking if a point is in a rectangle, but I also need to take into account the rotation of each rectangle. Does anybody know of a way to do this in C#?

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