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kernel-cases: the hollow ball of case 450 has two shells

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The case's own method says one body with an inner shell (the void of
radius 18.5 inside the ball of radius 40), but without a "shells" entry
the rig asks one shell per body. It now asks two, as the method derives.
SMLib still fails the case on its volume: 294558 mm3, near the sum of
the two balls (294604) rather than their difference (241561), so the
inner shell is not taken as a void.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017itGh5fpMEousnZ91cYcVt
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jyviko
2026-10-21 23:14:00 -04:00
parent f97b721287
commit 4b2c0eaff1
1 changed files with 2 additions and 1 deletions
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tests/kernel-cases/sweeps/450-revolve-spherical-shell-sketched-off-the-origin/expected.json
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@@ -5,8 +5,9 @@
],
"what": "a half ring between two arcs (both radial lines on the axis) revolved a full turn from a sketch plane 10 mm above the origin (volume +34 %)",
"source": "analytic",
"method": "the revolve is a hollow ball of radii 40 and 18.5 centred at (0,0,10): V = 4/3 pi (40^3 - 18.5^3), A = 4 pi (40^2 + 18.5^2); two spherical faces, one body with an inner shell.",
"method": "the revolve is a hollow ball of radii 40 and 18.5 centred at (0,0,10): V = 4/3 pi (40^3 - 18.5^3), A = 4 pi (40^2 + 18.5^2); two spherical faces, one body with an inner shell. The inner sphere bounds the void, so the body has two shells.",
"body_count": 1,
"shells": 2,
"volume_mm3": 241560.72432594837,
"area_mm2": 24407.033325739103,
"faces": 2,