fix(mask): cap radius under PYAUTO_SMALL_DATASETS#325
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Mask2D.circular already clamps shape_native and pixel_scales when PYAUTO_SMALL_DATASETS=1, but left radius untouched. Group SLaM scripts asking for radius=6.0-7.5 inside the post-clamp 15x15/0.6 grid silently received a fully-unmasked square, which the post-cef28716 strict is_circular correctly rejected — causing Hilbert image-mesh to raise PixelizationException. Cap radius to min(shape_native) * pixel_scales / 2.0 (handling both float and tuple pixel_scales). Three tests added: oversized clamps, in-bounds passes through, tuple-scales path covered. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
When
PYAUTO_SMALL_DATASETS=1,Mask2D.circularclampedshape_nativeto(15, 15)andpixel_scalesto0.6but leftradiusuntouched. Callers asking forradiuslarger than the post-clamp grid half-extent silently received a fully-unmasked 15×15 square instead of a circular disc.After
cef28716tightenedis_circular, this surfaced as aPixelizationExceptionfrom Hilbert image-mesh in two group SLaM scripts (group/features/{linear_light_profiles,no_lens_light}/slam.py). The cluster's prescribed root cause ("scripts pass a non-circular mask") was misleading — both scripts already useMask2D.circular; the fault was in the small-datasets shim.API Changes
None — internal behaviour change only. Under
PYAUTO_SMALL_DATASETS=1,Mask2D.circularnow also clampsradiustomin(shape_native) * pixel_scales / 2.0. Outside that env var the function is unchanged.See full details below.
Test Plan
pytest test_autoarray/mask/test_mask_2d.py— 59 passed (3 new tests)PYAUTO_SMALL_DATASETS=1 PYAUTO_TEST_MODE=2 ... python scripts/group/features/no_lens_light/slam.py— completes 4 searches end-to-end (was raisingPixelizationException)PYAUTO_SMALL_DATASETS=1 PYAUTO_TEST_MODE=2 ... python scripts/group/features/linear_light_profiles/slam.py— completes 6 searches end-to-end (was raisingPixelizationException)Full API Changes (for automation & release notes)
Changed Behaviour
Mask2D.circular(shape_native, pixel_scales, radius, ...)— whenPYAUTO_SMALL_DATASETS=1,radiusis now clamped tomin(shape_native) * pixel_scales / 2.0. No effect outside the env var; no effect whenradiusalready fits.Not Changed
Mask2D.circular_annular,Mask2D.elliptical,Mask2D.elliptical_annularcarry the same latent overflow pattern but are untouched here — no failing cluster exercises them. Same fix can be applied if/when needed.🤖 Generated with Claude Code