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
1.5 KiB
JSON

{
"name": "Calfs",
"primary": 2,
"working": ["leg_r", "leg_l"],
"props": [
{"type": "scene", "shapes": [
{"kind": "line", "pts": [[124, 126], [158, 124]], "w": 9, "depth": 8},
{"kind": "line", "pts": [[138, 128], [138, 150]], "w": 5},
{"kind": "line", "pts": [[120, 150], [156, 150]], "w": 5, "depth": 5},
{"kind": "line", "pts": [[201, 150], [229, 150]], "w": 6, "depth": 7},
{"kind": "line", "pts": [[183, 62], [183, 122]], "w": 4},
{"kind": "line", "pts": [[164, 76], [183, 76]], "w": 3, "color": "prop"}
]},
{"type": "pad", "at": ["knee_r", "knee_l"], "angle": 0, "halfLen": 14, "w": 7},
{"type": "pad", "at": ["foot_r", "foot_l"], "angle": 15, "halfLen": 7, "w": 5}
],
"frames": [
{
"hold": 0.4, "tween": 0.9,
"root": {"pos": [140, 118], "pitch": -10},
"spine": [0, 4],
"neck": 16,
"shoulder_r": 44, "elbow_r": 25,
"shoulder_l": 44, "elbow_l": 25,
"hip_r": 62, "knee_r": 50, "ankle_r": 12,
"hip_l": 62, "knee_l": 56, "ankle_l": 12,
"pins": {"hand_r": [166, 74], "hand_l": [170, 76], "foot_r": [212, 148], "foot_l": [216, 150]}
},
{
"hold": 0.4, "tween": 1.2,
"root": {"pos": [140, 118], "pitch": -10},
"spine": [0, 4],
"neck": 16,
"shoulder_r": 44, "elbow_r": 25,
"shoulder_l": 44, "elbow_l": 25,
"hip_r": 66, "knee_r": 59, "ankle_r": -18,
"hip_l": 66, "knee_l": 64, "ankle_l": -18,
"pins": {"hand_r": [166, 74], "hand_l": [170, 76], "foot_r": [212, 139], "foot_l": [216, 141]}
}
]
}