[agg]Anti-Grain Geometry - : 「The trick here is that the sign (dilation or shrinking) depends on the vertex order - clockwise or counterclockwise.」 http://www.antigrain.com/demo/
[agg]Anti-Grain Geometry - : 「The trick here is that the sign (dilation or shrinking) depends on the vertex order - clockwise or counterclockwise.」 http://www.antigrain.com/demo/
