(xa, ya, xb, yb)
| 9 | c = random.random() |
| 10 | |
| 11 | def frCurve(xa, ya, xb, yb): |
| 12 | dx = xb - xa |
| 13 | dy = yb - ya |
| 14 | d = math.hypot(dx, dy) |
| 15 | if d <= 1: |
| 16 | if xa >= 0 and xa < imgx and ya >=0 and ya < imgy: |
| 17 | image.putpixel((xa, ya), (0, 255, 0)) |
| 18 | if xb >= 0 and xb < imgx and yb >=0 and yb < imgy: |
| 19 | image.putpixel((xb, yb), (0, 255, 0)) |
| 20 | return |
| 21 | xm = xa + dx * c |
| 22 | ym = ya + dy * c + math.copysign(dx * c, random.random() - 0.5) |
| 23 | frCurve(xa, ya, xm, ym) |
| 24 | frCurve(xm, ym, xb, yb) |
| 25 | |
| 26 | # main |
| 27 | frCurve(0, (imgy - 1) / 2, imgx - 1, (imgy - 1) / 2) |
no test coverage detected