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GetNormal

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		Name	Description
	FVector2< T ...	GetNormal ( int VertexIndex )	Get the normal vector at a vertex of the polygon, which is perpendicular to GetTangent() Points "inward" for a Clockwise Polygon, and outward for CounterClockwise
	FVector2< T ...	GetNormal ( int iSeg, T SegmentParam )

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