run 20260429T002000Z-8a02

Summary

Prompt

Make a single solid consisting of a cube with a hemispherical dome fused onto its top face. Cube: 40mm × 40mm × 40mm, centered in X and Y with the bottom face on the XY plane (so it spans x in [-20, 20], y in [-20, 20], z in [0, 40]). Dome: a hemisphere of radius 15mm sitting on top of the cube, centered on the Z axis. The flat (circular) face of the hemisphere is flush with the top face of the cube at z = 40, and the dome extends upward from there. The two parts are joined into a single solid (their shared circular interface is internal, not a face). Note: the kernel only has a full Sphere primitive — to get a hemisphere you must boolean a sphere with a half-space (e.g. intersect a sphere with a large cube positioned at z ≥ 40).

Checks

params: {
  "type": "valid_solid"
}

details: {
  "root_count": 1,
  "solids_produced": 1
}

params: {
  "type": "bbox",
  "min": [
    -20,
    -20,
    0
  ],
  "max": [
    20,
    20,
    55
  ],
  "tolerance_mm": 0.2
}

details: {
  "actual_max": [
    20,
    20,
    55
  ],
  "actual_min": [
    -20,
    -20,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.2
}

params: {
  "type": "mass_props",
  "volume_mm3": 71068.58,
  "tolerance_pct": 2
}

details: {
  "volume": {
    "actual_mm3": 71014.22599097838,
    "deviation_pct": 0.07648106803544766,
    "pass": true,
    "spec_mm3": 71068.58,
    "tolerance_pct": 2
  }
}

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 2
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          20,
          20,
          55
        ],
        "original_min": [
          -20,
          -20,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          20,
          20,
          55
        ],
        "roundtripped_min": [
          -20,
          -20,
          0
        ],
        "tolerance_mm": 1.57797338380595
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.010455034469166093,
        "original_mm3": 71014.20159492244,
        "pass": true,
        "roundtripped_mm3": 71021.6261541772
      }
    }
  ],
  "tolerance_pct": 2
}

Tool calls

{
  "model": "gpt-5",
  "max_tokens": 8000,
  "system_chars": 1674,
  "user_chars": 808
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260429T002000Z-8a02.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": { "id": 1, "name": "BaseCube", "op": { "type": "Cube", "size": { "x": 40, "y": 40, "z": 40 } } },
    "2": { "id": 2, "name": "BaseCube_Pos", "op": { "type": "Translate", "child": 1, "offset": { "x": -20, "y": -20, "z": 0 } } },
    "3": { "id": 3, "name": "Sphere_r15", "op": { "type": "Sphere", "radius": 15, "segments": 32 } },
    "4": { "id": 4, "name": "Sphere_At_Z40", "op": { "type": "Translate", "child": 3, "offset": { "x": 0, "y": 0, "z": 40 } } },
    "5": { "id": 5, "name": "HalfspaceCube", "op": { "type": "Cube", "size": { "x": 200, "y": 200, "z": 200 } } },
    "6": { "id": 6, "name": "Halfspace_Z>=40", "op": { "type": "Translate", "child": 5, "offset": { "x": -100, "y": -100, "z": 40 } } },
    "7": { "id": 7, "name": "Hemisphere_Top", "op": { "type": "Intersection", "left": 4, "right": 6 } },
    "8": { "id": 8, "name": "CubePlusDome", "op": { "type": "Union", "left": 2, "right": 7 } }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    { "root": 8, "material": "default" }
  ]
}

generated 2026-06-19T01:47:55.961Z · static site, regenerate with npm run build -w @mecheval/leaderboard