31     PxVec a(0.0, 1.0);  in TEST()  local
35     auto result = intersect(a, b, c, d);  in TEST()
40     a = {0.0, 1.0};  in TEST()
44     result = intersect(a, b, c, d);  in TEST()
46     result = intersect(c, d, a, b);  in TEST()
49     a = {0.0, 0.0};  in TEST()
53     result = intersect(a, b, c, d);  in TEST()
55     result = intersect(c, d, a, b);  in TEST()
58     a = {0.0, 0.0};  in TEST()
62     result = intersect(a, b, c, d);  in TEST()
64     result = intersect(c, d, a, b);  in TEST()
68     a = {0.0, 1.0};  in TEST()
72     result = intersect(a, b, c, d);  in TEST()
74     result = intersect(c, d, a, b);  in TEST()
77     a = {3.0, 1.0};  in TEST()
81     result = intersect(a, b, c, d);  in TEST()
83     result = intersect(c, d, a, b);  in TEST()
86     a = {1.0, 1.0};  in TEST()
90     result = intersect(a, b, c, d);  in TEST()
93     result = intersect(c, d, a, b);  in TEST()
97     a = {-1.0, -1.0};  in TEST()
101     result = intersect(a, b, c, d);  in TEST()
104     result = intersect(c, d, a, b);  in TEST()
108     a = {1.0, -1.0};  in TEST()
112     result = intersect(a, b, c, d);  in TEST()
115     result = intersect(c, d, a, b);  in TEST()