FA-51821 / Raster clipping / Open access
Circle span scissor: row sample offset · case 01
Row distance is measured from the row top rather than the pixel center, skewing the disc vertically.
ROOT CAUSE
Row distance is measured from the row top rather than the pixel center, skewing the disc vertically.
VERIFIED REPAIR
Restore the specified clipping decision at row sample offset. Each command is [cx,cy,r,scissor] for a filled disc centred on the integer pixel-corner point (cx,cy). Pixel (x,y) is covered when its center (x+1/2,y+1/2) lies within the closed disc. Rows of the half-open scissor [left,top,right,bottom) intersected with [0,size) are scanned in order, computing exact integer span bounds with half-pixel doubled coordinates and an integer square root, then clipping to scissor columns. Non-empty spans are [row,start,end).
Unsuccessful approach: Measuring from the row bottom mirrors the vertical skew.
Case contract
Each command is [cx,cy,r,scissor] for a filled disc centred on the integer pixel-corner point (cx,cy). Pixel (x,y) is covered when its center (x+1/2,y+1/2) lies within the closed disc. Rows of the half-open scissor [left,top,right,bottom) intersected with [0,size) are scanned in order, computing exact integer span bounds with half-pixel doubled coordinates and an integer square root, then clipping to scissor columns. Non-empty spans are [row,start,end).
Why this case matters
Raster clipping decides which pixels a primitive may touch; a single wrong clip decision writes outside the target or scissor, or silently drops visible coverage.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
from math import isqrt
N = 1
observations = []
def solve(commands, size):
out=[]
for cx,cy,r,clip in commands:
l,t,rr,b=max(clip[0],0),max(clip[1],0),min(clip[2],size),min(clip[3],size)
spans=[]
for y in range(t,b):
m=4*r*r-(2*y-2*cy)**2
if m<0: continue
k=isqrt(m)
xa=-((1+k-2*cx)//2)
xb=(2*cx-1+k)//2+1
xa,xb=max(xa,l),min(xb,rr)
if xa<xb: spans.append([y,xa,xb])
out.append(spans)
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 6, 6]]], 6), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 6, 6]]], 6), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[3, 3, 3, [1, 1, 6, 5]]], 6), [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 6, 6]]], 6), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[6, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 6, 4]]], 6), [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 6, 6]]], 6), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 6, 6]]], 6), [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]])
if N == 2:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 7, 7]]], 7), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 7, 7]]], 7), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[3, 3, 3, [1, 1, 7, 6]]], 7), [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6], [5, 1, 5]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 7, 7]]], 7), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[7, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 6, 7], [2, 5, 7], [3, 5, 7], [4, 6, 7]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 7, 4]]], 7), [[[0, 2, 7], [1, 2, 7], [2, 2, 7], [3, 2, 7]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 7, 7]]], 7), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 7, 7]]], 7), [[[0, 0, 7], [1, 0, 7], [2, 0, 7], [3, 0, 7], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 3:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 8, 8]]], 8), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 8, 8]]], 8), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[4, 4, 4, [1, 1, 8, 7]]], 8), [[[1, 1, 7], [2, 1, 8], [3, 1, 8], [4, 1, 8], [5, 1, 8], [6, 1, 7]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 8, 8]]], 8), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[8, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 7, 8], [2, 6, 8], [3, 6, 8], [4, 7, 8]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 8, 4]]], 8), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 8, 8]]], 8), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 8, 8]]], 8), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 4:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 9, 9]]], 9), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 9, 9]]], 9), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[4, 4, 4, [1, 1, 9, 8]]], 9), [[[1, 1, 7], [2, 1, 8], [3, 1, 8], [4, 1, 8], [5, 1, 8], [6, 1, 7], [7, 2, 6]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 9, 9]]], 9), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[9, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 8, 9], [2, 7, 9], [3, 7, 9], [4, 8, 9]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 9, 4]]], 9), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 9, 9]]], 9), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 9, 9]]], 9), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 5:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 10, 10]]], 10), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 10, 10]]], 10), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[5, 5, 5, [1, 1, 10, 9]]], 10), [[[1, 1, 9], [2, 1, 9], [3, 1, 10], [4, 1, 10], [5, 1, 10], [6, 1, 10], [7, 1, 9], [8, 1, 9]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 10, 10]]], 10), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[10, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 9, 10], [2, 8, 10], [3, 8, 10], [4, 9, 10]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 10, 4]]], 10), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 10, 10]]], 10), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 10, 10]]], 10), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| explicit case 0 | [[[2, 1, 5], [3, 1, 5], [4, 1, 5]]] | [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]] | Failed |
| explicit case 1 | [[[1, 1, 5], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]] | [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]] | Failed |
| explicit case 2 | [[[2, 1, 3]]] | [[[1, 1, 3], [2, 1, 3]]] | Failed |
| explicit case 3 | [[[1, 1, 5], [2, 1, 6], [3, 1, 6], [4, 1, 6]]] | [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]] | Failed |
| explicit case 4 | [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]] | [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]] | Passed |
| explicit case 5 | [[[2, 4, 6], [3, 4, 6], [4, 4, 6]]] | [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]] | Failed |
| explicit case 6 | [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]] | [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]] | Passed |
| explicit case 7 | [[[2, 0, 3], [3, 0, 3], [4, 0, 3]]] | [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]] | Failed |
| explicit case 8 | [[[2, 0, 4], [3, 0, 5], [4, 0, 5], [5, 0, 5]]] | [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]] | Failed |
| explicit case 9 | [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]] | [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]] | Passed |
SHA-256 / e673a7bbad193bce917755510ddd8835b43655687daef1cd312962358665c3d8
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
from math import isqrt
N = 1
observations = []
def solve(commands, size):
out=[]
for cx,cy,r,clip in commands:
l,t,rr,b=max(clip[0],0),max(clip[1],0),min(clip[2],size),min(clip[3],size)
spans=[]
for y in range(t,b):
m=4*r*r-(2*y+2-2*cy)**2
if m<0: continue
k=isqrt(m)
xa=-((1+k-2*cx)//2)
xb=(2*cx-1+k)//2+1
xa,xb=max(xa,l),min(xb,rr)
if xa<xb: spans.append([y,xa,xb])
out.append(spans)
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 6, 6]]], 6), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 6, 6]]], 6), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[3, 3, 3, [1, 1, 6, 5]]], 6), [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 6, 6]]], 6), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[6, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 6, 4]]], 6), [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 6, 6]]], 6), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 6, 6]]], 6), [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]])
if N == 2:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 7, 7]]], 7), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 7, 7]]], 7), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[3, 3, 3, [1, 1, 7, 6]]], 7), [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6], [5, 1, 5]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 7, 7]]], 7), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[7, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 6, 7], [2, 5, 7], [3, 5, 7], [4, 6, 7]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 7, 4]]], 7), [[[0, 2, 7], [1, 2, 7], [2, 2, 7], [3, 2, 7]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 7, 7]]], 7), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 7, 7]]], 7), [[[0, 0, 7], [1, 0, 7], [2, 0, 7], [3, 0, 7], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 3:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 8, 8]]], 8), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 8, 8]]], 8), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[4, 4, 4, [1, 1, 8, 7]]], 8), [[[1, 1, 7], [2, 1, 8], [3, 1, 8], [4, 1, 8], [5, 1, 8], [6, 1, 7]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 8, 8]]], 8), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[8, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 7, 8], [2, 6, 8], [3, 6, 8], [4, 7, 8]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 8, 4]]], 8), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 8, 8]]], 8), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 8, 8]]], 8), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 4:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 9, 9]]], 9), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 9, 9]]], 9), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[4, 4, 4, [1, 1, 9, 8]]], 9), [[[1, 1, 7], [2, 1, 8], [3, 1, 8], [4, 1, 8], [5, 1, 8], [6, 1, 7], [7, 2, 6]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 9, 9]]], 9), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[9, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 8, 9], [2, 7, 9], [3, 7, 9], [4, 8, 9]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 9, 4]]], 9), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 9, 9]]], 9), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 9, 9]]], 9), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 5:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 10, 10]]], 10), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 10, 10]]], 10), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[5, 5, 5, [1, 1, 10, 9]]], 10), [[[1, 1, 9], [2, 1, 9], [3, 1, 10], [4, 1, 10], [5, 1, 10], [6, 1, 10], [7, 1, 9], [8, 1, 9]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 10, 10]]], 10), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[10, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 9, 10], [2, 8, 10], [3, 8, 10], [4, 9, 10]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 10, 4]]], 10), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 10, 10]]], 10), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 10, 10]]], 10), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| explicit case 0 | [[[1, 1, 5], [2, 1, 5], [3, 1, 5]]] | [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]] | Failed |
| explicit case 1 | [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 1, 5]]] | [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]] | Failed |
| explicit case 2 | [[[1, 1, 3]]] | [[[1, 1, 3], [2, 1, 3]]] | Failed |
| explicit case 3 | [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 5]]] | [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]] | Failed |
| explicit case 4 | [[[0, 0, 3], [1, 0, 2]]] | [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]] | Failed |
| explicit case 5 | [[[1, 4, 6], [2, 4, 6], [3, 4, 6]]] | [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]] | Failed |
| explicit case 6 | [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]] | [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]] | Passed |
| explicit case 7 | [[[1, 0, 3], [2, 0, 3], [3, 0, 3]]] | [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]] | Failed |
| explicit case 8 | [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 4]]] | [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]] | Failed |
| explicit case 9 | [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]] | [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]] | Passed |
SHA-256 / e42374eab7016fc5e1dc553ab085f8e31d503896625f1b576c27777d2c9a6d59
3 / The verified repair
Exit 0"""Failure Map reference implementation. Python standard library only."""
import json
from math import isqrt
N = 1
observations = []
def solve(commands, size):
out=[]
for cx,cy,r,clip in commands:
l,t,rr,b=max(clip[0],0),max(clip[1],0),min(clip[2],size),min(clip[3],size)
spans=[]
for y in range(t,b):
m=4*r*r-(2*y+1-2*cy)**2
if m<0: continue
k=isqrt(m)
xa=-((1+k-2*cx)//2)
xb=(2*cx-1+k)//2+1
xa,xb=max(xa,l),min(xb,rr)
if xa<xb: spans.append([y,xa,xb])
out.append(spans)
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 6, 6]]], 6), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 6, 6]]], 6), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[3, 3, 3, [1, 1, 6, 5]]], 6), [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 6, 6]]], 6), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[6, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 6, 4]]], 6), [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 6, 6]]], 6), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 6, 6]]], 6), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 6, 6]]], 6), [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]])
if N == 2:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 7, 7]]], 7), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 7, 7]]], 7), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[3, 3, 3, [1, 1, 7, 6]]], 7), [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6], [5, 1, 5]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 7, 7]]], 7), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[7, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 6, 7], [2, 5, 7], [3, 5, 7], [4, 6, 7]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 7, 4]]], 7), [[[0, 2, 7], [1, 2, 7], [2, 2, 7], [3, 2, 7]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 7, 7]]], 7), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 7, 7]]], 7), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 7, 7]]], 7), [[[0, 0, 7], [1, 0, 7], [2, 0, 7], [3, 0, 7], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 3:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 8, 8]]], 8), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 8, 8]]], 8), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[4, 4, 4, [1, 1, 8, 7]]], 8), [[[1, 1, 7], [2, 1, 8], [3, 1, 8], [4, 1, 8], [5, 1, 8], [6, 1, 7]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 8, 8]]], 8), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[8, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 7, 8], [2, 6, 8], [3, 6, 8], [4, 7, 8]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 8, 4]]], 8), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 8, 8]]], 8), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 8, 8]]], 8), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 8, 8]]], 8), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 4:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 9, 9]]], 9), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 9, 9]]], 9), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[4, 4, 4, [1, 1, 9, 8]]], 9), [[[1, 1, 7], [2, 1, 8], [3, 1, 8], [4, 1, 8], [5, 1, 8], [6, 1, 7], [7, 2, 6]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 9, 9]]], 9), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[9, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 8, 9], [2, 7, 9], [3, 7, 9], [4, 8, 9]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 9, 4]]], 9), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 9, 9]]], 9), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 9, 9]]], 9), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 9, 9]]], 9), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
if N == 5:
check('explicit case 0', solve([[3, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]])
check('explicit case 1', solve([[3, 3, 3, [0, 0, 10, 10]]], 10), [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]])
check('explicit case 2', solve([[2, 2, 1, [0, 0, 10, 10]]], 10), [[[1, 1, 3], [2, 1, 3]]])
check('explicit case 3', solve([[5, 5, 5, [1, 1, 10, 9]]], 10), [[[1, 1, 9], [2, 1, 9], [3, 1, 10], [4, 1, 10], [5, 1, 10], [6, 1, 10], [7, 1, 9], [8, 1, 9]]])
check('explicit case 4', solve([[0, 0, 3, [0, 0, 10, 10]]], 10), [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]])
check('explicit case 5', solve([[10, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 9, 10], [2, 8, 10], [3, 8, 10], [4, 9, 10]]])
check('explicit case 6', solve([[4, 2, 4, [2, 0, 10, 4]]], 10), [[[0, 2, 8], [1, 2, 8], [2, 2, 8], [3, 2, 8]]])
check('explicit case 7', solve([[1, 3, 2, [0, 0, 10, 10]]], 10), [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]])
check('explicit case 8', solve([[2, 4, 3, [0, 0, 10, 10]]], 10), [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5], [6, 0, 4]]])
check('explicit case 9', solve([[3, 2, 5, [0, 0, 10, 10]]], 10), [[[0, 0, 8], [1, 0, 8], [2, 0, 8], [3, 0, 8], [4, 0, 7], [5, 0, 7], [6, 1, 5]]])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| explicit case 0 | [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]] | [[[1, 2, 4], [2, 1, 5], [3, 1, 5], [4, 2, 4]]] | Passed |
| explicit case 1 | [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]] | [[[0, 1, 5], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 1, 5]]] | Passed |
| explicit case 2 | [[[1, 1, 3], [2, 1, 3]]] | [[[1, 1, 3], [2, 1, 3]]] | Passed |
| explicit case 3 | [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]] | [[[1, 1, 6], [2, 1, 6], [3, 1, 6], [4, 1, 6]]] | Passed |
| explicit case 4 | [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]] | [[[0, 0, 3], [1, 0, 3], [2, 0, 2]]] | Passed |
| explicit case 5 | [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]] | [[[1, 5, 6], [2, 4, 6], [3, 4, 6], [4, 5, 6]]] | Passed |
| explicit case 6 | [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]] | [[[0, 2, 6], [1, 2, 6], [2, 2, 6], [3, 2, 6]]] | Passed |
| explicit case 7 | [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]] | [[[1, 0, 2], [2, 0, 3], [3, 0, 3], [4, 0, 2]]] | Passed |
| explicit case 8 | [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]] | [[[1, 0, 4], [2, 0, 5], [3, 0, 5], [4, 0, 5], [5, 0, 5]]] | Passed |
| explicit case 9 | [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]] | [[[0, 0, 6], [1, 0, 6], [2, 0, 6], [3, 0, 6], [4, 0, 6], [5, 0, 6]]] | Passed |
SHA-256 / c548acc932506688c4fae5fdb9262f2a9392099598ab72612c7ca12b67705445
Verification & scope
Exact integer/rational arithmetic on small stipulated fixtures models the clipping decision only; no memory layout, GPU pipeline, graphics API or standards conformance is claimed. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.
Observations recorded using Python 3.12.14 at 2026-09-29T14:45:22.670494+00:00.
Case digest / a77f183e1af92a128cce1dec06ac63a7faf44b3f6bb5f6d4c25f19487966f611