fix: remodel vertex-weight-limit's mech arm as an actual machine#80
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The previous asset read as stacked barrels with a pool-float elbow and horn claws: the 'boot' hid the joint, the prongs were thin spikes, and the forearm was stubby while the upper arm was long. Rebuilt as a machine: bolted pedestal and shoulder fairing, shoulder hub, upper arm ending in clevis cheeks, the elbow hinge pin capped through a ribbed flex bellows, a long plated forearm, wrist bellows and collar, palm, and a three-finger two-segment gripper. The teal accent still marks the pruned-weight zones (bellows at the elbow hinge and wrist). Every check contract holds on the remodel: the flex bellows keep the z ranges the five-bone bumps are tuned for (pre_max=5), and measured values are identical on 5.1.2 and 4.5.11 (verts=1840, limited=128, sum 2.98e-08, pose 2.73e-03, lbs 2.67e-07). Re-falsified: probe A exit 4, probe B exit 6 (1.269e-02), probe C exit 8 (1.796). No tolerance loosened. Signed-off-by: fOuttaMyPaint <TMhospitalitystrategies@gmail.com>
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Summary
The maintainer flagged the deployed hero: the previous asset read as stacked barrels with a pool-float elbow and horn claws — not a mech arm. Honest diagnosis: the 'boot' hid the joint entirely, the prongs were thin spikes reading as horns, and proportions were inverted (stubby forearm, long upper arm).
Remodel (build_arm rewritten), keeping every check contract:
Contract preservation: the flex bellows keep the z ranges the five-bone bumps are tuned for, so
pre_max=5holds; no count assertions exist in this example's check (verified: it asserts influence counts, sums, pose, LBS, root pin — no totals). Measured values identical on both binaries:verts=1840 pre=5 post=4 limited=128 sum_err=2.98e-08 pose_dev=2.73e-03 lbs_err=2.67e-07 root_move=0.Re-falsified on the remodel (5.1.2): probe A (no limit) exit 4; probe B (no renormalize) exit 6 (sums 1.269e-02); probe C (no vertex groups) exit 8 (LBS dev 1.796). No tolerance loosened. README intro/render paragraph and the top-level README alt text updated to the new part descriptions; group contact sheet refreshed (luminance 111.4, in set range).
Live-run verification: check + render on
.scratch/blender-5.1.2-windows-x64/blender.exe(Blender 5.1.2) and.scratch/blender-4.5.11-windows-x64/blender.exe(Blender 4.5.11 LTS); pixels inspected at full size (gripper and elbow crops) and card crop. Render path green on both.Test plan
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