run 20260428T233002Z-e5f6

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: {
  "error": "parse: Invalid JSON vcad file: invalid type: map, expected u64 at line 35 column 5",
  "reason": "fatal evaluation error"
}

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

details: {
  "reason": "no valid solid to measure"
}

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

details: {
  "reason": "no valid solid to measure"
}

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

details: {
  "reason": "no valid solid to round-trip"
}

Tool calls

{
  "model": "gpt-4o-mini",
  "max_tokens": 8000,
  "system_chars": 1674,
  "user_chars": 808
}

What the model built

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Cube",
      "op": {
        "type": "Cube",
        "size": {
          "x": 40,
          "y": 40,
          "z": 40
        }
      }
    },
    "2": {
      "id": 2,
      "name": "Dome",
      "op": {
        "type": "Intersection",
        "left": {
          "type": "Sphere",
          "radius": 15,
          "segments": 32
        },
        "right": {
          "type": "Cube",
          "size": {
            "x": 100,
            "y": 100,
            "z": 100
          }
        }
      }
    },
    "3": {
      "id": 3,
      "name": "Dome_Translate",
      "op": {
        "type": "Translate",
        "child": 2,
        "offset": {
          "x": 0,
          "y": 0,
          "z": 40
        }
      }
    },
    "4": {
      "id": 4,
      "name": "Final_Solid",
      "op": {
        "type": "Union",
        "left": 1,
        "right": 3
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{
    "root": 4,
    "material": "default"
  }]
}

generated 2026-06-19T01:47:55.956Z · static site, regenerate with npm run build -w @mecheval/leaderboard