Method QuadTo

path.go:453–470

QuadTo adds a quadratic Bézier path with control point (cpx,cpy) and end point (x,y).

(cpx, cpy, x, y float64)

// QuadTo adds a quadratic Bézier path with control point (cpx,cpy) and end point (x,y).
func (p *Path) QuadTo(cpx, cpy, x, y float64) {
	start := p.Pos()
	cp := Point{cpx, cpy}
	end := Point{x, y}
	if start.Equals(end) && start.Equals(cp) {
		return
	} else if !start.Equals(end) && (start.Equals(cp) || angleEqual(end.Sub(start).AngleBetween(cp.Sub(start)), 0.0)) && (end.Equals(cp) || angleEqual(end.Sub(start).AngleBetween(end.Sub(cp)), 0.0)) {
		p.LineTo(end.X, end.Y)
		return
	}

	if len(p.d) == 0 {
		p.MoveTo(0.0, 0.0)
	} else if p.d[len(p.d)-1] == CloseCmd {
		p.MoveTo(p.d[len(p.d)-3], p.d[len(p.d)-2])
	}
	p.d = append(p.d, QuadToCmd, cp.X, cp.Y, end.X, end.Y, QuadToCmd)
}

// CubeTo adds a cubic Bézier path with control points (cpx1,cpy1) and (cpx2,cpy2) and end point (x,y).
func (p *Path) CubeTo(cpx1, cpy1, cpx2, cpy2, x, y float64) {