func drawCurve(dc *gg.Context) { dc.SetRGBA(0, 0, 0, 0.1) dc.FillPreserve() dc.SetRGB(0, 0, 0) dc.SetLineWidth(12) dc.Stroke() }
func drawStartPoint(dc *gg.Context) { dc.SetRGBA(0, 1, 0, 1) dc.SetLineWidth(20) dc.Stroke() }
func drawPoints(dc *gg.Context) { dc.SetRGBA(1, 0, 0, 1) dc.SetLineWidth(2) dc.Stroke() }