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从连续几何到离散像素：亲手观察每一个像素如何被算法选中
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| step | i | xFloat | yFloat | round(x) | round(y) | pixel |
|---|---|---|---|---|---|---|
| 0 | 0 | 3.00 | 4.00 | 3 | 4 | (3,4) |
| 1 | 1 | 4.00 | 4.63 | 4 | 5 | (4,5) |
| 2 | 2 | 5.00 | 5.26 | 5 | 5 | (5,5) |
| 3 | 3 | 6.00 | 5.89 | 6 | 6 | (6,6) |
| 4 | 4 | 7.00 | 6.53 | 7 | 7 | (7,7) |
| 5 | 5 | 8.00 | 7.16 | 8 | 7 | (8,7) |
| 6 | 6 | 9.00 | 7.79 | 9 | 8 | (9,8) |
| 7 | 7 | 10.00 | 8.42 | 10 | 8 | (10,8) |
| 8 | 8 | 11.00 | 9.05 | 11 | 9 | (11,9) |
| 9 | 9 | 12.00 | 9.68 | 12 | 10 | (12,10) |
| 10 | 10 | 13.00 | 10.32 | 13 | 10 | (13,10) |
| 11 | 11 | 14.00 | 10.95 | 14 | 11 | (14,11) |
| 12 | 12 | 15.00 | 11.58 | 15 | 12 | (15,12) |
| 13 | 13 | 16.00 | 12.21 | 16 | 12 | (16,12) |
| 14 | 14 | 17.00 | 12.84 | 17 | 13 | (17,13) |
| 15 | 15 | 18.00 | 13.47 | 18 | 13 | (18,13) |
| 16 | 16 | 19.00 | 14.11 | 19 | 14 | (19,14) |
| 17 | 17 | 20.00 | 14.74 | 20 | 15 | (20,15) |
| 18 | 18 | 21.00 | 15.37 | 21 | 15 | (21,15) |
| 19 | 19 | 22.00 | 16.00 | 22 | 16 | (22,16) |