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package main
import "github.com/fogleman/gg"
func main() {
const S = 1000
dc := gg.NewContext(S, S)
dc.SetRGB(1, 1, 1)
dc.Clear()
dc.Translate(S/2, S/2)
dc.Scale(40, 40)
var x0, y0, x1, y1, x2, y2, x3, y3 float64
x0, y0 = -10, 0
x1, y1 = -8, -8
x2, y2 = 8, 8
x3, y3 = 10, 0
dc.MoveTo(x0, y0)
dc.CubicTo(x1, y1, x2, y2, x3, y3)
dc.SetRGBA(0, 0, 0, 0.2)
dc.SetLineWidth(8)
dc.FillPreserve()
dc.SetRGB(0, 0, 0)
dc.SetDash(16, 24)
dc.Stroke()
dc.MoveTo(x0, y0)
dc.LineTo(x1, y1)
dc.LineTo(x2, y2)
dc.LineTo(x3, y3)
dc.SetRGBA(1, 0, 0, 0.4)
dc.SetLineWidth(2)
dc.SetDash(4, 8, 1, 8)
dc.Stroke()
dc.SavePNG("out.png")
}
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