Function TestIntersectionEllipseEllipse

path_intersection_test.go:431–498

(t *testing.T)

}

func TestIntersectionEllipseEllipse(t *testing.T) {
	var tts = []struct {
		arc, arc2 string
		zs        Intersections
	}{
		// secant
		{"M5 0A5 5 0 0 1 -5 0", "M-10 -5A10 10 0 0 1 -10 15", Intersections{
			{Point{0.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{math.Pi, 0.5 * math.Pi}, false, false},
		}},

		// tangent
		{"A5 5 0 0 1 0 10", "M10 0A5 5 0 0 0 10 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},
		}},

		// fully same
		{"A5 5 0 0 1 0 10", "A5 5 0 0 1 0 10", Intersections{
			{Point{0.0, 0.0}, [2]float64{0.0, 0.0}, [2]float64{0.0, 0.0}, true, true},
			{Point{0.0, 10.0}, [2]float64{1.0, 1.0}, [2]float64{math.Pi, math.Pi}, true, true},
		}},
		{"A5 5 0 0 1 0 10", "M0 10A5 5 0 0 0 0 0", Intersections{
			{Point{0.0, 0.0}, [2]float64{0.0, 1.0}, [2]float64{0.0, math.Pi}, true, true},
			{Point{0.0, 10.0}, [2]float64{1.0, 0.0}, [2]float64{math.Pi, 0.0}, true, true},
		}},

		// partly same
		{"A5 5 0 0 1 0 10", "A5 5 0 0 1 5 5", Intersections{
			{Point{0.0, 0.0}, [2]float64{0.0, 0.0}, [2]float64{0.0, 0.0}, true, true},
			{Point{5.0, 5.0}, [2]float64{0.5, 1.0}, [2]float64{0.5 * math.Pi, 0.5 * math.Pi}, true, true},
		}},
		{"A5 5 0 0 1 0 10", "M5 5A5 5 0 0 1 0 10", Intersections{
			{Point{5.0, 5.0}, [2]float64{0.5, 0.0}, [2]float64{0.5 * math.Pi, 0.5 * math.Pi}, true, true},
			{Point{0.0, 10.0}, [2]float64{1.0, 1.0}, [2]float64{math.Pi, math.Pi}, true, true},
		}},
		{"A5 5 0 0 1 0 10", "M5 5A5 5 0 0 1 -5 5", Intersections{
			{Point{5.0, 5.0}, [2]float64{0.5, 0.0}, [2]float64{0.5 * math.Pi, 0.5 * math.Pi}, true, true},
			{Point{0.0, 10.0}, [2]float64{1.0, 0.5}, [2]float64{math.Pi, math.Pi}, true, true},
		}},

		{"M30.170131507649785 37.66143576791836A0.8700000000002787 0.8700000000002787 0 0 1 28.82999999999447 36.92939999999941", "M30.242341004748596 37.609669236818846A0.8700000000000001 0.8700000000000001 0 0 1 28.82999999999447 36.9294", Intersections{
			{Point{30.170131507649785, 37.66143576791836}, [2]float64{0.0, 0.0455326614}, [2]float64{2.5707027528269983, 2.5707027528269983}, true, true},
			{Point{28.82999999999447, 36.92939999999941}, [2]float64{1.0, 1.0}, [2]float64{1.5 * math.Pi, 1.5 * math.Pi}, true, true},
		}}, // #280
	}
	origEpsilon := Epsilon
	for _, tt := range tts {
		t.Run(fmt.Sprint(tt.arc, "x", tt.arc2), func(t *testing.T) {
			Epsilon = origEpsilon
			arc := MustParseSVGPath(tt.arc).ReverseScanner()
			arc2 := MustParseSVGPath(tt.arc2).ReverseScanner()
			arc.Scan()
			arc2.Scan()

			rx, ry, rot, large, sweep := arc.Arc()
			phi := rot * math.Pi / 180.0
			cx, cy, theta0, theta1 := ellipseToCenter(arc.Start().X, arc.Start().Y, rx, ry, phi, large, sweep, arc.End().X, arc.End().Y)

			rx2, ry2, rot2, large2, sweep2 := arc2.Arc()