Function TestIntersectionLineQuad

path_intersection_test.go:249–286

(t *testing.T)

}

func TestIntersectionLineQuad(t *testing.T) {
	var tts = []struct {
		line, quad string
		zs         Intersections
	}{
		// secant
		{"M0 5L10 5", "Q10 5 0 10", Intersections{
			{Point{5.0, 5.0}, [2]float64{0.5, 0.5}, [2]float64{0.0, 0.5 * math.Pi}, false, false},
		}},

		// tangent
		{"L0 10", "Q10 5 0 10", Intersections{
			{Point{0.0, 0.0}, [2]float64{0.0, 0.0}, [2]float64{0.5 * math.Pi, Point{2.0, 1.0}.Angle()}, true, false},
			{Point{0.0, 10.0}, [2]float64{1.0, 1.0}, [2]float64{0.5 * math.Pi, Point{-2.0, 1.0}.Angle()}, true, false},
		}},
		{"M5 0L5 10", "Q10 5 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},
		}},

		// none
		{"M-1 0L-1 10", "Q10 5 0 10", Intersections{}},
	}
	origEpsilon := Epsilon
	for _, tt := range tts {
		t.Run(fmt.Sprint(tt.line, "x", tt.quad), func(t *testing.T) {
			Epsilon = origEpsilon
			line := MustParseSVGPath(tt.line).ReverseScanner()
			quad := MustParseSVGPath(tt.quad).ReverseScanner()
			line.Scan()
			quad.Scan()

			zs := intersectionLineQuad(nil, line.Start(), line.End(), quad.Start(), quad.CP1(), quad.End())
			Epsilon = 3.0 * origEpsilon
			test.T(t, zs, tt.zs)
		})
	}
	Epsilon = origEpsilon
}

func TestIntersectionLineCube(t *testing.T) {
	var tts = []struct {