Files
rzen 79e75a9127 Fix figure IK snapping and gate the library on a fail-hard motion checker
Three solver defects made limbs teleport, twist, or windmill: write-back
angles wrapped at ±180 and lerped the long way around; branch flips landed
on configurations the anatomical write-back cannot represent, silently
pulling pinned extremities off their pins; and the degenerate straight-limb
bend plane fell back to the camera axis instead of the anatomical anterior.
solve_limb now verifies each branch reproduces the solved end before
accepting it, resolve unwraps written-back angles toward the pose they
replace, and the degenerate plane comes from the parent's anterior axis.

render.py --check replays every exercise's full tween loop and fails hard
on six invariants (pin fidelity, continuity, wraps, authored-vs-resolved
drift, ground penetration, resolved ROM); --export refuses to ship a
failing exercise. All 66 motions re-authored or retouched to pass: honest
authored angles where pins used to override them silently, grounded feet
on the seated machines, a vertical bench-press bar path, straight-armed
child's pose, a butterfly stretch seated on the mat, and FK arms where
pins forced impossible reaches. MotionSolver.swift mirrors the solver
changes line for line, held by regenerated fixtures.

Claude-Session: https://claude.ai/code/session_01PKptrgbx74peTwHGRxBojv
2026-07-12 00:37:23 -04:00

43 lines
3.3 KiB
XML

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 180" fill="none">
<title>Hip Thrust</title>
<defs>
<linearGradient id="grad-leg_l-0" gradientUnits="userSpaceOnUse" x1="155.9" y1="136.8" x2="193.4" y2="110.6"><stop offset="0" stop-color="#86cfc5"/><stop offset="1" stop-color="#71c5ba"/></linearGradient>
<linearGradient id="grad-leg_l-1" gradientUnits="userSpaceOnUse" x1="193.4" y1="110.6" x2="207.0" y2="147.6"><stop offset="0" stop-color="#71c5ba"/><stop offset="1" stop-color="#86cfc5"/></linearGradient>
</defs>
<path d="M 32.5 160.9 L 229.8 160.9 L 229.8 150.5 L 32.5 150.5 Z" fill="none" stroke="#b9bec9" stroke-width="3" stroke-linejoin="round"/>
<path d="M 50.0 122.0 L 88.0 122.0 L 88.0 122.0 L 50.0 122.0 Z" fill="#c5cad4" stroke="#c5cad4" stroke-width="9" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M 68.0 127.0 L 68.0 150.0" stroke="#c5cad4" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
<g id="arm_l">
<path d="M 75.2 110.3 L 98.1 129.3" stroke="#a9afba" stroke-width="5" stroke-linecap="round"/>
<path d="M 98.1 129.3 L 128.0 127.2" stroke="#a9afba" stroke-width="5" stroke-linecap="round"/>
</g>
<g id="leg_l">
<path d="M 155.9 136.8 L 193.4 110.6" stroke="url(#grad-leg_l-0)" stroke-width="5.08861" stroke-linecap="round"/>
<path d="M 193.4 110.6 L 207.0 147.6" stroke="url(#grad-leg_l-1)" stroke-width="5.08861" stroke-linecap="round"/>
<path d="M 207.0 147.6 L 217.0 143.1" stroke="#86cfc5" stroke-width="5" stroke-linecap="round"/>
</g>
<path id="girdle" d="M 75.2 110.3 L 69.3 110.2 L 69.3 112.1" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
<path id="pelvisBar" d="M 155.9 136.8 L 150.0 136.0 L 150.0 137.2" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
<path id="spine" d="M 150.0 136.0 Q 107.3 127.0 69.3 110.2" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
<g id="leg_r">
<path d="M 150.0 137.2 L 187.9 111.6" stroke="#0d9488" stroke-width="6" stroke-linecap="round"/>
<path d="M 187.9 111.6 L 203.0 148.0" stroke="#0d9488" stroke-width="6" stroke-linecap="round"/>
<path d="M 203.0 148.0 L 212.8 143.1" stroke="#0d9488" stroke-width="6" stroke-linecap="round"/>
</g>
<g id="arm_r">
<path d="M 69.3 112.1 L 94.0 128.8" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round"/>
<path d="M 94.0 128.8 L 124.0 129.0" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round"/>
</g>
<path d="M 126.0 123.6 L 126.0 132.7" stroke="#6b7180" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
<circle cx="126.0" cy="123.6" r="13" fill="#6b7180"/>
<circle cx="126.0" cy="132.7" r="13" fill="#6b7180"/>
<circle id="head" cx="60.2" cy="92.7" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
<line id="nose" x1="68.8" y1="87.6" x2="74.8" y2="84.0" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
<g font-family="-apple-system, Helvetica, sans-serif" font-size="11" fill="#6b7180">
<line x1="224" y1="16" x2="238" y2="16" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
<text x="243" y="20">near</text>
<line x1="273" y1="16" x2="287" y2="16" stroke="#a9afba" stroke-width="4" stroke-linecap="round"/>
<text x="292" y="20">far</text>
</g>
</svg>