run 20260429T001423Z-1f2b

Summary

Prompt

Make a single solid that is the union of two cylinders intersecting at right angles. Vertical cylinder: outside diameter 20mm, length 40mm, axis along Z, base on the XY plane (z = 0 to z = 40), centered on the Z axis. Horizontal cylinder: outside diameter 20mm, length 40mm, axis along the X axis, centered at (0, 0, 20) (so it passes through the middle of the vertical cylinder). The two cylinders are merged into one solid (their intersection region counts only once).

Checks

params: {
  "type": "valid_solid"
}

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

params: {
  "type": "bbox",
  "min": [
    -20,
    -10,
    0
  ],
  "max": [
    20,
    10,
    40
  ],
  "tolerance_mm": 0.2
}

details: {
  "actual_max": [
    20,
    10,
    40
  ],
  "actual_min": [
    -20,
    -10,
    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": 19799.41,
  "tolerance_pct": 1.5
}

details: {
  "volume": {
    "actual_mm3": 19542.540886227045,
    "deviation_pct": 1.297357415059109,
    "pass": true,
    "spec_mm3": 19799.41,
    "tolerance_pct": 1.5
  }
}

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1.5
}

details: {
  "per_solid": [
    {
      "index": 0,
      "pass": false,
      "reason": "solid is not BRep-backed (mesh-only after a boolean fallback?)"
    }
  ],
  "tolerance_pct": 1.5
}

Tool calls

{
  "model": "gpt-5-mini",
  "max_tokens": 8000,
  "system_chars": 1674,
  "user_chars": 530
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260429T001423Z-1f2b.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "vertical_cylinder",
      "op": {
        "type": "Cylinder",
        "radius": 10,
        "height": 40,
        "segments": 32
      }
    },
    "2": {
      "id": 2,
      "name": "horizontal_cylinder_prim",
      "op": {
        "type": "Cylinder",
        "radius": 10,
        "height": 40,
        "segments": 32
      }
    },
    "3": {
      "id": 3,
      "name": "horizontal_cylinder_rotated",
      "op": {
        "type": "Rotate",
        "child": 2,
        "angles": {
          "x": 0,
          "y": 90,
          "z": 0
        }
      }
    },
    "4": {
      "id": 4,
      "name": "horizontal_cylinder_translated",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": {
          "x": -20,
          "y": 0,
          "z": 20
        }
      }
    },
    "5": {
      "id": 5,
      "name": "cross_shaft_union",
      "op": {
        "type": "Union",
        "left": 1,
        "right": 4
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 5,
      "material": "default"
    }
  ]
}

generated 2026-06-19T01:47:55.831Z · static site, regenerate with npm run build -w @mecheval/leaderboard