Function TestPathBounds

path_test.go:360–393

(t *testing.T)

}

func TestPathBounds(t *testing.T) {
	var tts = []struct {
		p      string
		bounds Rect
	}{
		{"", Rect{}},
		{"Q50 100 100 0", Rect{0, 0, 100, 50}},
		{"Q100 50 0 100", Rect{0, 0, 50, 100}},
		{"Q0 0 100 0", Rect{0, 0, 100, 0}},
		{"Q100 0 100 0", Rect{0, 0, 100, 0}},
		{"Q100 0 100 100", Rect{0, 0, 100, 100}},
		{"C0 0 100 0 100 0", Rect{0, 0, 100, 0}},
		{"C0 100 100 100 100 0", Rect{0, 0, 100, 75}},
		{"C0 0 100 90 100 0", Rect{0, 0, 100, 40}},
		{"C0 90 100 0 100 0", Rect{0, 0, 100, 40}},
		{"C100 100 0 100 100 0", Rect{0, 0, 100, 75}},
		{"C66.667 0 100 33.333 100 100", Rect{0, 0, 100, 100}},
		{"M3.1125 1.7812C3.4406 1.7812 3.5562 1.5938 3.4578 1.2656", Rect{3.1125, 1.2656, 3.1125 + 0.379252, 1.2656 + 0.515599}},
		{"A100 100 0 0 0 100 100", Rect{0, 0, 100, 100}},
		{"A50 100 90 0 0 200 0", Rect{0, 0, 200, 50}},
		{"A100 100 0 1 0 -100 100", Rect{-200, -100, 0, 100}}, // hit xmin, ymin
		{"A100 100 0 1 1 -100 100", Rect{-100, 0, 100, 200}},  // hit xmax, ymax
	}
	origEpsilon := Epsilon
	for _, tt := range tts {
		t.Run(tt.p, func(t *testing.T) {
			Epsilon = origEpsilon
			bounds := MustParseSVGPath(tt.p).Bounds()
			Epsilon = 1e-6
			test.T(t, bounds, tt.bounds)
		})
	}
	Epsilon = origEpsilon
}

// for quadratic Bézier use https://www.wolframalpha.com/input/?i=length+of+the+curve+%7Bx%3D2*(1-t)*t*50.00+%2B+t%5E2*100.00,+y%3D2*(1-t)*t*66.67+%2B+t%5E2*0.00%7D+from+0+to+1
// for cubic Bézier use https://www.wolframalpha.com/input/?i=length+of+the+curve+%7Bx%3D3*(1-t)%5E2*t*0.00+%2B+3*(1-t)*t%5E2*100.00+%2B+t%5E3*100.00,+y%3D3*(1-t)%5E2*t*66.67+%2B+3*(1-t)*t%5E2*66.67+%2B+t%5E3*0.00%7D+from+0+to+1