Draws a line between the coordinates in the xy list. Pythonの http://effbot.org/imagingbook/imagedraw.htm#tag-ImageDraw.Draw.line のようなことしたい

drawline.go

package main

import (
    "github.com/akavel/polyclip-go"
    "github.com/akavel/polyclip-go/polyutil"
    "image"
    "image/color"
    "image/draw"
    "image/png"
    "os"
)

var list []float64 = []float64{x0, y0, x1, y1,......}

func main() {

    m := image.NewRGBA(image.Rect(0, 0, 500, 500))
    draw.Draw(m, m.Bounds(), &image.Uniform{color.RGBA{0, 0, 255,
255}}, image.ZP, draw.Src)

    pts := list2points(list)
    polyutil.DrawPolyline(pts, brush(m))

    w, _ := os.Create("new.png")
    defer w.Close()
    png.Encode(w, m)
}

func brush(im draw.Image) func(x, y int) {
    return func(x, y int) {
        im.Set(x, y, color.RGBA{255, 255, 255, 255})
    }
}

func list2points(l []float64) []polyclip.Point {
    pts := make([]polyclip.Point, 0)
    for i := 0; i < len(l); i = i + 2 {
        p := polyclip.Point{l[i], l[i+1]}
        pts = append(pts, p)
    }
    return pts
}