Function TestRectCapBound

s2/rect_test.go:381–414

(t *testing.T)

}

func TestRectCapBound(t *testing.T) {
	tests := []struct {
		r    Rect
		want Cap
	}{
		{ // Bounding cap at center is smaller.
			rectFromDegrees(-45, -45, 45, 45),
			CapFromCenterHeight(Point{r3.Vector{X: 1, Y: 0, Z: 0}}, 0.5),
		},
		{ // Bounding cap at north pole is smaller.
			rectFromDegrees(88, -80, 89, 80),
			CapFromCenterAngle(Point{r3.Vector{X: 0, Y: 0, Z: 1}}, s1.Angle(2)*s1.Degree),
		},
		{ // Longitude span > 180 degrees.
			rectFromDegrees(-30, -150, -10, 50),
			CapFromCenterAngle(Point{r3.Vector{X: 0, Y: 0, Z: -1}}, s1.Angle(80)*s1.Degree),
		},
		{
			// Longitude span > 180 degrees and latitude span > 90 degrees. This results
			// in a polar cap that is larger than the "midpoint cap" (centered at the
			// center of the rect and containing the vertices), but is nonetheless the
			// correct result. The "midpoint cap" must not be returned since it doesn't
			// contain the entire rect due the rect being wider than 180 degrees.
			// In this example, (-34, 49) is in the rect but not the midpoint cap.
			rectFromDegrees(-60, -150, 70, 50),
			CapFromCenterAngle(Point{r3.Vector{X: 0, Y: 0, Z: 1}}, s1.Angle(150)*s1.Degree),
		},
	}
	for _, test := range tests {
		if got := test.r.CapBound(); !test.want.ApproxEqual(got) {
			t.Errorf("%v.CapBound() was %v, want %v", test.r, got, test.want)
		}
	}
}

func TestRectIntervalOps(t *testing.T) {
	// Rectangle that covers one-quarter of the sphere.