Re: GraphicsPath.IsVisible broken?

I just ran into a similar situation. All you have to do is scale both the GraphicsPath and the point you´re testing by the same proportion.

Following your example:
(sorry if the syntax is not correct. I usually use C#)

Public Sub IsVisibleExample(ByVal e As PaintEventArgs)
Dim myPath As New GraphicsPath
myPath.AddEllipse(0.0, 0.0, 1.0, 1.0)

myPath.Transform(new Matrix(100, 0, 0, 100, 0, 0)) '(1)

Dim visible As Boolean = myPath.IsVisible(0.5 * 100, 0.5 * 100, e.Graphics) '(2)
MessageBox.Show(visible.ToString())
End Sub

(1) Scale by 100 units in both the x and y dimensions. NOTE: If yopu´re planning to use the GraphicsPath again (for drawing it for example) do not scale it, scale a copy instead. The Transform method transforms the object that calls it.

(2) To scale a point just multiply the x and y coordinates by the desired factor.

So, that´s it. The higher the number you use as scale factor the more precise your IsVisible approach will be.

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