animation/clothing/configs/hunter_skirt_v5.json

{
  "name": "hunter_skirt_v5",
  "_worksheet": {
    "block": "aline_skirt (generated), panel outline then hand-shaped",
    "reference": "male-clothing-hunter-gpt-v2{,-side,-back}.png",
    "measured_targets": {
      "waist_top_m": 1.075,
      "solid_hem_m": 0.685,
      "fray_tips_m": 0.65,
      "method": "garment band located by warm-dark mask in all 3 reference views, expressed as fraction of figure height (back 0.598/0.373, side 0.610/0.396), averaged and projected onto Lena's 1.777 m",
      "flare_measured": 1.38,
      "flare_used": 1.45,
      "flare_note": "reference flares 1.38 (widths 98->134 px back, 102->142 px front); raised to 1.45 because 1.38 clears Lena's 109.5 cm hip by only 2.7 cm and a binding hem rides up"
    },
    "why_shaped": "v1 and v2 both failed in SIMULATION while their pre-sim snapshots were clean, which is what proved the pattern and arrangement were right. The straight-sided trapezoid takes its waist from 0.91 x HIP (99.6 cm), but at z=1.075 Lena measures only 71.5 cm -- 28 cm of surplus. v1 (no elastic) slid to the crotch and folded inside out; v2 cinched it with elastic but only at frame 250, by which time the surplus had already buckled into a flap that flipped through itself. Lena's 42 cm hip-to-waist drop over 13 cm of height is the root cause: no straight-sided cone can both grip a 71.5 cm waist and clear a 109.5 cm hip (it would need a 209 cm hem). A curved side seam solves it the way real tailoring does.",
    "ease_profile_cm": {
      "waist_z1.075": -3.5,
      "z1.010": 5.0,
      "hip_z0.945": 6.1
    },
    "hem_circ_cm": 126.0,
    "silhouette_note": "hem/waist ratio is 1.85 vs the reference's measured 1.38. The extra fullness is forced by Lena's hips, not a drafting choice -- the same garment on the male reference body hangs nearly straight.",
    "seam_pairing_discovery": "CROSS-PAIRED sides, front RIGHT <-> back LEFT: [(1,7),(2,6),(3,5),(7,1),(6,2),(5,3)] with (False, False). Established by a 4-cell sweep with the failing case as control (scratchpad/seams/seam_sheet.png): same-index (True,True) -- the rule in the marvelous-designer skill and what blocks.py emits -- COLLAPSES this panel, and so does same-index (False,False). Both cross-paired variants hold. The skill's rule ('identical panels need (True,True) on same-index sides') is derived from a trapezoid whose side is a SINGLE edge; reversal emulates mirroring there. With a 3-segment shaped side seam it does not, and the unrolled-cylinder truth takes over: front spans 0-180 deg and back 180-360, so front's right edge meets back's LEFT.",
    "failure_history": "v1 no elastic: slid to the crotch, folded inside out. v2 elastic at frame 250: too late, surplus had already buckled. v3 shaped panel but negative waist clearance: solver ejected the penetrating cloth, blew up by frame 20 in BOTH stiff and soft (that symmetry is what ruled out fabric stiffness). v4 clearances fixed but still collapsed -> isolated to seam pairing. Every failure had a CLEAN pre-sim snapshot, which is what kept pointing away from the pattern and at the sim."
  },
  "md": {
    "reset": "new_project",
    "avatar_fbx": "C:/Users/Jeremy/tinqs/animation/tools/tailor/avatar/Lena_QuatSkin_Avatar.fbx",
    "avatar_scale": 10.0,
    "add_arrangement_points": true,
    "auto_translate": true,
    "zfab": "C:/Users/Public/Documents/MarvelousDesigner/New Assets/Fabric/(Default for Simulation).zfab",
    "texture": "tools/tailor/textures/hunter_cloth.png",
    "texture_dpi": 130.0,
    "panels": [
      {
        "name": "front",
        "dx": 0.0,
        "note": "SHAPED skirt panel with POSITIVE clearance everywhere above the hip. Waist half 370 (+2.5 cm ease -- v4's -3.5 cm started the cloth INSIDE the body and MD ejected it), 468 at y=325 (+3.0), 575 at the hip y=260 (+5.5), 625 at the hem. Lines: 0 waist | 1-3 side_R | 4 hem | 5-7 side_L.",
        "points": [
          [
            127.5,
            390.0
          ],
          [
            497.5,
            390.0
          ],
          [
            546.5,
            325.0
          ],
          [
            600.0,
            260.0
          ],
          [
            625.0,
            0.0
          ],
          [
            0.0,
            0.0
          ],
          [
            25.0,
            260.0
          ],
          [
            78.5,
            325.0
          ]
        ]
      },
      {
        "name": "back",
        "dx": 875.0,
        "note": "identical panel offset by dx (NOT mirrored) -> sides must CROSS-pair",
        "points": [
          [
            127.5,
            390.0
          ],
          [
            497.5,
            390.0
          ],
          [
            546.5,
            325.0
          ],
          [
            600.0,
            260.0
          ],
          [
            625.0,
            0.0
          ],
          [
            0.0,
            0.0
          ],
          [
            25.0,
            260.0
          ],
          [
            78.5,
            325.0
          ]
        ]
      }
    ],
    "seams": [
      {
        "a": "front",
        "a_line": 1,
        "b": "back",
        "b_line": 7,
        "reverse_a": false,
        "reverse_b": false
      },
      {
        "a": "front",
        "a_line": 2,
        "b": "back",
        "b_line": 6,
        "reverse_a": false,
        "reverse_b": false
      },
      {
        "a": "front",
        "a_line": 3,
        "b": "back",
        "b_line": 5,
        "reverse_a": false,
        "reverse_b": false
      },
      {
        "a": "front",
        "a_line": 7,
        "b": "back",
        "b_line": 1,
        "reverse_a": false,
        "reverse_b": false
      },
      {
        "a": "front",
        "a_line": 6,
        "b": "back",
        "b_line": 2,
        "reverse_a": false,
        "reverse_b": false
      },
      {
        "a": "front",
        "a_line": 5,
        "b": "back",
        "b_line": 3,
        "reverse_a": false,
        "reverse_b": false
      }
    ],
    "arrangements": [
      {
        "panel": "front",
        "point": "Leg_Skirt_Front",
        "offset": [
          50,
          92,
          50
        ]
      },
      {
        "panel": "back",
        "point": "Leg_Skirt_Back",
        "offset": [
          0,
          92,
          50
        ]
      }
    ],
    "sim": {
      "strengthen": true,
      "settle_frames": 150,
      "relax_frames": 50,
      "elastic": [
        {
          "panel": "front",
          "line": 0,
          "total_length": 350.0
        },
        {
          "panel": "back",
          "line": 0,
          "total_length": 350.0
        }
      ],
      "elastic_frames": 60
    },
    "cam_viewpoint": 2,
    "presim_snapshot": "C:/Users/Jeremy/AppData/Local/Temp/tinqs_md_hunter_skirt_v5_presim.png",
    "snapshot": "C:/Users/Jeremy/AppData/Local/Temp/tinqs_md_hunter_skirt_v5.png",
    "back_snapshot": "C:/Users/Jeremy/AppData/Local/Temp/tinqs_md_hunter_skirt_v5_back.png",
    "export_dir": "C:/Users/Jeremy/tinqs/animation/tools/tailor",
    "export_basename": "lena_hunter_skirt_v5",
    "exports": []
  },
  "expect": {
    "bands": {
      "hunter_skirt_v2": {
        "top_m": 1.075,
        "bottom_m": 0.685,
        "tol_m": 0.03,
        "bottom_tol_m": 0.04,
        "from": "cover"
      }
    }
  }
}