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

39 lines
3.0 KiB
XML

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 180" fill="none">
<title>Kneeling Hip Flexor Stretch</title>
<defs>
<linearGradient id="grad-leg_l-0" gradientUnits="userSpaceOnUse" x1="167.9" y1="110.8" x2="142.2" y2="148.3"><stop offset="0" stop-color="#72c5bb"/><stop offset="1" stop-color="#86cfc5"/></linearGradient>
<linearGradient id="grad-leg_r-1" gradientUnits="userSpaceOnUse" x1="208.0" y1="111.3" x2="210.0" y2="150.6"><stop offset="0" stop-color="#3a3f4b"/><stop offset="1" stop-color="#3b404c"/></linearGradient>
<linearGradient id="grad-leg_r-2" gradientUnits="userSpaceOnUse" x1="210.0" y1="150.6" x2="220.9" y2="148.9"><stop offset="0" stop-color="#3b404c"/><stop offset="1" stop-color="#3a3f4b"/></linearGradient>
</defs>
<path d="M 80.8 160.5 L 277.7 160.5 L 277.7 150.1 L 80.8 150.1 Z" fill="none" stroke="#b9bec9" stroke-width="3" stroke-linejoin="round"/>
<g id="leg_l">
<path d="M 167.9 110.8 L 142.2 148.3" stroke="url(#grad-leg_l-0)" stroke-width="5.08225" stroke-linecap="round"/>
<path d="M 142.2 148.3 L 102.4 144.2" stroke="#86cfc5" stroke-width="5" stroke-linecap="round"/>
<path d="M 102.4 144.2 L 92.8 149.4" stroke="#86cfc5" stroke-width="5" stroke-linecap="round"/>
</g>
<g id="arm_l">
<path d="M 241.9 81.7 L 211.9 80.6" stroke="#a9afba" stroke-width="5" stroke-linecap="round"/>
<path d="M 211.9 80.6 L 210.0 110.1" stroke="#a9afba" stroke-width="5" stroke-linecap="round"/>
</g>
<path id="girdle" d="M 241.9 81.7 L 236.0 81.7 L 236.0 83.6" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
<path id="pelvisBar" d="M 167.9 110.8 L 162.0 110.0 L 162.0 111.2" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
<path id="spine" d="M 162.0 110.0 Q 188.9 67.5 236.0 81.7" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
<g id="leg_r">
<path d="M 162.0 111.2 L 208.0 111.3" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round"/>
<path d="M 208.0 111.3 L 210.0 150.6" stroke="url(#grad-leg_r-1)" stroke-width="5.99576" stroke-linecap="round"/>
<path d="M 210.0 150.6 L 220.9 148.9" stroke="url(#grad-leg_r-2)" stroke-width="5.99576" stroke-linecap="round"/>
</g>
<g id="arm_r">
<path d="M 236.0 83.6 L 206.0 82.4" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round"/>
<path d="M 206.0 82.4 L 206.0 111.9" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round"/>
</g>
<circle id="head" cx="255.7" cy="84.7" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
<line id="nose" x1="256.4" y1="94.7" x2="256.9" y2="101.6" 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>