Function TestIntersectionLineEllipse

path_intersection_test.go:338–429

(t *testing.T)

}

func TestIntersectionLineEllipse(t *testing.T) {
	var tts = []struct {
		line, arc string
		zs        Intersections
	}{
		// secant
		{"M0 5L10 5", "A5 5 0 0 1 0 10", Intersections{
			{Point{5.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{0.0, 0.5 * math.Pi}, false, false},
		}},
		{"M0 5L10 5", "A5 5 0 1 1 0 10", Intersections{
			{Point{5.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{0.0, 0.5 * math.Pi}, false, false},
		}},
		{"M0 5L-10 5", "A5 5 0 0 0 0 10", Intersections{
			{Point{-5.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{math.Pi, 0.5 * math.Pi}, false, false},
		}},
		{"M-5 0L-5 -10", "A5 5 0 0 0 -10 0", Intersections{
			{Point{-5.0, -5.0}, [2]float64{0.5, 0.5}, [2]float64{1.5 * math.Pi, math.Pi}, false, false},
		}},
		{"M0 10L10 10", "A10 5 90 0 1 0 20", Intersections{
			{Point{5.0, 10.0}, [2]float64{0.5, 0.5}, [2]float64{0.0, 0.5 * math.Pi}, false, false},
		}},

		// tangent
		{"M-5 0L-15 0", "A5 5 0 0 0 -10 0", Intersections{
			{Point{-10.0, 0.0}, [2]float64{0.5, 1.0}, [2]float64{math.Pi, 0.5 * math.Pi}, true, false},
		}},
		{"M-5 0L-15 0", "A5 5 0 0 1 -10 0", Intersections{
			{Point{-10.0, 0.0}, [2]float64{0.5, 1.0}, [2]float64{math.Pi, 1.5 * math.Pi}, true, false},
		}},
		{"L0 10", "A10 5 0 0 1 0 10", Intersections{
			{Point{0.0, 0.0}, [2]float64{0.0, 0.0}, [2]float64{0.5 * math.Pi, 0.0}, true, false},
			{Point{0.0, 10.0}, [2]float64{1.0, 1.0}, [2]float64{0.5 * math.Pi, math.Pi}, true, false},
		}},
		{"M5 0L5 10", "A5 5 0 0 1 0 10", Intersections{
			{Point{5.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{0.5 * math.Pi, 0.5 * math.Pi}, true, false},
		}},
		{"M-5 0L-5 10", "A5 5 0 0 0 0 10", Intersections{
			{Point{-5.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{0.5 * math.Pi, 0.5 * math.Pi}, true, false},
		}},
		{"M5 0L5 20", "A10 5 90 0 1 0 20", Intersections{
			{Point{5.0, 10.0}, [2]float64{0.5, 0.5}, [2]float64{0.5 * math.Pi, 0.5 * math.Pi}, true, false},
		}},
		{"M4 3L0 3", "M2 3A1 1 0 0 0 4 3", Intersections{
			{Point{4.0, 3.0}, [2]float64{0.0, 1.0}, [2]float64{math.Pi, 1.5 * math.Pi}, true, false},
			{Point{2.0, 3.0}, [2]float64{0.5, 0.0}, [2]float64{math.Pi, 0.5 * math.Pi}, true, false},
		}},

		// none
		{"M6 0L6 10", "A5 5 0 0 1 0 10", Intersections{}},
		{"M10 5L15 5", "A5 5 0 0 1 0 10", Intersections{}},
		{"M6 0L6 20", "A10 5 90 0 1 0 20", Intersections{}},

		// bugs
		{"M0 -0.7L1 -0.7", "M-0.7 0A0.7 0.7 0 0 1 0.7 0", Intersections{
			{Point{0.0, -0.7}, [2]float64{0.0, 0.5}, [2]float64{0.0, 0.0}, true, false},
		}}, // #200, at intersection the arc angle is deviated towards positive angle
		{"M30.23402723090112,37.620459766287226L30.170131507649785,37.66143576791836", "M30.242341004748596 37.609669236818846A0.8700000000000001 0.8700000000000001 0 0 1 28.82999999999447 36.9294", Intersections{
			{Point{30.170131507649785, 37.66143576791836}, [2]float64{1.0, 0.04553266140095003}, [2]float64{2.571361371137828, 2.570702752627385}, true, false},