Function TestLoopContainsPoint

s2/loop_test.go:395–486

(t *testing.T)

}

func TestLoopContainsPoint(t *testing.T) {
	north := Point{r3.Vector{X: 0, Y: 0, Z: 1}}
	south := Point{r3.Vector{X: 0, Y: 0, Z: -1}}
	east := PointFromCoords(0, 1, 0)
	west := PointFromCoords(0, -1, 0)

	if EmptyLoop().ContainsPoint(north) {
		t.Errorf("empty loop should not have any points")
	}
	if !FullLoop().ContainsPoint(south) {
		t.Errorf("full loop should have full point vertex")
	}

	for _, tc := range []struct {
		name string
		l    *Loop
		in   Point
		out  Point
	}{
		{
			"north hemisphere",
			northHemi,
			north,
			south,
		},
		{
			"south hemisphere",
			southHemi,
			south,
			north,
		},
		{
			"west hemisphere",
			westHemi,
			west,
			east,
		},
		{
			"east hemisphere",
			eastHemi,
			east,
			west,
		},
		{
			"candy cane",
			candyCane,
			PointFromLatLng(LatLngFromDegrees(5, 71)),
			PointFromLatLng(LatLngFromDegrees(-8, 71)),
		},
	} {
		l := tc.l
		for i := range 4 {
			if !l.ContainsPoint(tc.in) {
				t.Errorf("%s loop should contain %v at rotation %d", tc.name, tc.in, i)
			}
			if l.ContainsPoint(tc.out) {
				t.Errorf("%s loop shouldn't contain %v at rotation %d", tc.name, tc.out, i)
			}