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

42 lines
3.7 KiB
XML

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 180" fill="none">
<title>Hip Circles</title>
<defs>
<linearGradient id="grad-leg_l-0" gradientUnits="userSpaceOnUse" x1="166.4" y1="88.7" x2="168.9" y2="120.7"><stop offset="0" stop-color="#525763"/><stop offset="1" stop-color="#7b818c"/></linearGradient>
<linearGradient id="grad-leg_l-1" gradientUnits="userSpaceOnUse" x1="168.9" y1="120.7" x2="164.1" y2="147.1"><stop offset="0" stop-color="#7b818c"/><stop offset="1" stop-color="#a9afba"/></linearGradient>
<linearGradient id="grad-leg_r-1" gradientUnits="userSpaceOnUse" x1="156.5" y1="120.7" x2="155.8" y2="148.2"><stop offset="0" stop-color="#3a3f4b"/><stop offset="1" stop-color="#a9afba"/></linearGradient>
<linearGradient id="grad-leg_r-2" gradientUnits="userSpaceOnUse" x1="155.8" y1="148.2" x2="161.2" y2="149.3"><stop offset="0" stop-color="#a9afba"/><stop offset="1" stop-color="#3a3f4b"/></linearGradient>
<linearGradient id="grad-arm_l-1" gradientUnits="userSpaceOnUse" x1="176.9" y1="40.6" x2="182.9" y2="37.5"><stop offset="0" stop-color="#a9afba"/><stop offset="1" stop-color="#979da8"/></linearGradient>
<linearGradient id="grad-arm_r-0" gradientUnits="userSpaceOnUse" x1="152.4" y1="30.4" x2="140.3" y2="45.5"><stop offset="0" stop-color="#404551"/><stop offset="1" stop-color="#3a3f4b"/></linearGradient>
</defs>
<path d="M 115.1 151.2 L 180.7 162.5 L 210.4 157.4 L 144.8 146.0 Z" fill="none" stroke="#b9bec9" stroke-width="2.1" stroke-linejoin="round"/>
<g id="leg_l">
<path d="M 166.4 88.7 L 168.9 120.7" stroke="url(#grad-leg_l-0)" stroke-width="3.91818" stroke-linecap="round"/>
<path d="M 168.9 120.7 L 164.1 147.1" stroke="url(#grad-leg_l-1)" stroke-width="3.6437" stroke-linecap="round"/>
<path d="M 164.1 147.1 L 169.4 149.6" stroke="#a9afba" stroke-width="3.5" stroke-linecap="round"/>
</g>
<g id="leg_r">
<path d="M 156.5 88.9 L 156.5 120.7" stroke="#3a3f4b" stroke-width="4.2" stroke-linecap="round"/>
<path d="M 156.5 120.7 L 155.8 148.2" stroke="url(#grad-leg_r-1)" stroke-width="3.85" stroke-linecap="round"/>
<path d="M 155.8 148.2 L 161.2 149.3" stroke="url(#grad-leg_r-2)" stroke-width="3.85" stroke-linecap="round"/>
</g>
<g id="arm_l">
<path d="M 166.2 29.4 L 176.9 40.6" stroke="#a9afba" stroke-width="3.5" stroke-linecap="round"/>
<path d="M 176.9 40.6 L 182.9 37.5" stroke="url(#grad-arm_l-1)" stroke-width="3.55726" stroke-linecap="round"/>
</g>
<path id="girdle" d="M 166.2 29.4 L 157.8 29.4 L 152.4 30.4" stroke="#0d9488" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"/>
<path id="pelvisBar" d="M 166.4 88.7 L 160.0 88.3 L 156.5 88.9" stroke="#0d9488" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"/>
<path id="spine" d="M 160.0 88.3 Q 159.6 58.2 157.8 29.4" stroke="#0d9488" stroke-width="4.2" stroke-linecap="round" stroke-linejoin="round"/>
<g id="arm_r">
<path d="M 152.4 30.4 L 140.3 45.5" stroke="url(#grad-arm_r-0)" stroke-width="4.18121" stroke-linecap="round"/>
<path d="M 140.3 45.5 L 159.4 40.1" stroke="#3a3f4b" stroke-width="4.2" stroke-linecap="round"/>
</g>
<circle id="head" cx="157.1" cy="15.5" r="7.0" fill="white" stroke="#3a3f4b" stroke-width="4.2"/>
<line id="nose" x1="164.1" y1="16.1" x2="167.6" y2="16.3" stroke="#3a3f4b" stroke-width="2.8" 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>