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| Title | Find the orientation of a polygon (clockwise or counterclockwise) in Visual Basic .NET |
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| Description | This example shows how to find the orientation of a polygon (clockwise or counterclockwise) in Visual Basic .NET. |
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| Keywords | polygon, orientation, clockwise, counterclockwise, graphics, VB.NET |
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| Categories | Graphics, VB.NET |
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This program calculate the polygon's signed area. The result is negative if the polygon is oriented clockwise. See the HowTo Calculate a polygon's area in Visual Basic .NET for information on finding a polygon's signed area.
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' Return True if the polygon is oriented clockwise.
Public Function PolygonIsOrientedClockwise(ByVal points() _
As PointF) As Boolean
Return SignedPolygonArea(points) < 0
End Function
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For more information on graphics programming in Visual Basic, see my book Visual Basic Graphics Programming.
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