Convex Hull Points : 
0.0	0.0	default
0.0	0.0	second
0.0	0.0	first
0.0	0.1	first
0.0	0.14285714285714285	second
0.0	0.2	first
0.0	0.2857142857142857	second
0.1	0.5	first
0.5	0.8	first
0.9	1.0	first
1.0	1.0	second
1.0	1.0	first
1.0	1.0	default