{
  "method": "Existing local parser/checkGeometry and bidirectional surfaceDifference; independent binary edge incidence and signed-volume checks.",
  "observedDate": "2026-10-26",
  "toolRoutes": ["/stl-compare", "/stl-viewer"],
  "captureCommand": "INSPECTMESH_REFRESH_EVIDENCE=1 npx vitest run scripts/export-fidelity.spec.mts",
  "executionPath": "Local functions in Vitest; not browser UI, deployed server, CAD export or physical print.",
  "sourceRevision": "3bd76d856da9ea12c463f83f02269651d94059c7",
  "controls": [
    {
      "name": "square-hole-8mm.stl",
      "sha256": "cddc7eb789a1f06c45fe5ce01e9bd04d8601a34fc27e75eabd3928c24cf39ac0",
      "bytes": 1684,
      "analytical": {
        "holeWidthMm": 8,
        "triangles": 32,
        "volumeMm3": 11360
      },
      "independentlyReopened": {
        "count": 32,
        "bounds": [
          {
            "min": 0,
            "max": 40
          },
          {
            "min": 0,
            "max": 30
          },
          {
            "min": 0,
            "max": 10
          }
        ],
        "signedVolume": 11360.000000000002
      },
      "localCheck": {
        "dimensionsMm": {
          "width": 40,
          "height": 30,
          "depth": 10
        },
        "triangles": 32,
        "topology": {
          "openEdges": 0,
          "nonManifoldEdges": 0,
          "degenerateTriangles": 0,
          "duplicateTriangles": 0,
          "shells": 1,
          "orientationConflicts": 0,
          "volume": 11360,
          "volumeReliable": true
        },
        "fit": null,
        "thickness": {
          "method": "Bounded triangle-centroid normal rays",
          "samples": 32,
          "measured": 32,
          "unmeasured": 0,
          "belowThreshold": 0,
          "minimumMm": 9.99999,
          "thresholdMm": 1.2
        },
        "skipped": [
          "Self intersections and nested-shell solid interpretation are not checked.",
          "Slicer settings, supports, strength and actual print success are not checked.",
          "Printer fit skipped: no printer selected."
        ]
      }
    },
    {
      "name": "square-hole-6mm.stl",
      "sha256": "3c2baec1967cacee89eb2a2aabb9ab19ad3590735f10235bd0f9a50e42bd16cc",
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      "analytical": {
        "holeWidthMm": 6,
        "triangles": 32,
        "volumeMm3": 11640
      },
      "independentlyReopened": {
        "count": 32,
        "bounds": [
          {
            "min": 0,
            "max": 40
          },
          {
            "min": 0,
            "max": 30
          },
          {
            "min": 0,
            "max": 10
          }
        ],
        "signedVolume": 11640
      },
      "localCheck": {
        "dimensionsMm": {
          "width": 40,
          "height": 30,
          "depth": 10
        },
        "triangles": 32,
        "topology": {
          "openEdges": 0,
          "nonManifoldEdges": 0,
          "degenerateTriangles": 0,
          "duplicateTriangles": 0,
          "shells": 1,
          "orientationConflicts": 0,
          "volume": 11640,
          "volumeReliable": true
        },
        "fit": null,
        "thickness": {
          "method": "Bounded triangle-centroid normal rays",
          "samples": 32,
          "measured": 32,
          "unmeasured": 0,
          "belowThreshold": 0,
          "minimumMm": 9.99999,
          "thresholdMm": 1.2
        },
        "skipped": [
          "Self intersections and nested-shell solid interpretation are not checked.",
          "Slicer settings, supports, strength and actual print success are not checked.",
          "Printer fit skipped: no printer selected."
        ]
      }
    }
  ],
  "comparison": {
    "units": "mm",
    "alignment": "original coordinates",
    "translationMm": [0, 0, 0],
    "toleranceMm": 0.1,
    "samplesPerDirection": 5000,
    "forward": {
      "samples": 5000,
      "maximumSampledMm": 1.412438826600542,
      "meanSampledMm": 0.07416838644006189,
      "samplesOverTolerance": 392
    },
    "reverse": {
      "samples": 5000,
      "maximumSampledMm": 1.0000000000000036,
      "meanSampledMm": 0.06714301916152095,
      "samplesOverTolerance": 364
    },
    "maximumSampledMm": 1.412438826600542,
    "meanSampledMm": 0.07065570280079105,
    "samplesOverTolerance": 756,
    "limitation": "Finite area-distributed point-to-triangle samples; not a whole-surface bound or automatic hole recognition."
  },
  "curves": [
    {
      "name": "circle-24-segments.stl",
      "sha256": "c1586cbca807323a87880a2f94afb0ce9b5f5599db1b8de0a256487017fb394c",
      "bytes": 4884,
      "segments": 24,
      "analytical": {
        "radiusMm": 10,
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        "sagittaMm": 0.08555138626189618,
        "volumeMm3": 6211.657082460498
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      "independentlyReopened": {
        "count": 96,
        "bounds": [
          {
            "min": -10,
            "max": 10
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          {
            "min": -10,
            "max": 10
          },
          {
            "min": 0,
            "max": 20
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        ],
        "signedVolume": 6211.657101514176
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      "localCheck": {
        "dimensionsMm": {
          "width": 20,
          "height": 20,
          "depth": 20
        },
        "triangles": 96,
        "topology": {
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          "nonManifoldEdges": 0,
          "degenerateTriangles": 0,
          "duplicateTriangles": 0,
          "shells": 1,
          "orientationConflicts": 0,
          "volume": 6211.657101514171,
          "volumeReliable": true
        },
        "fit": null,
        "thickness": {
          "method": "Bounded triangle-centroid normal rays",
          "samples": 96,
          "measured": 96,
          "unmeasured": 0,
          "belowThreshold": 0,
          "minimumMm": 19.828886870225915,
          "thresholdMm": 1.2
        },
        "skipped": [
          "Self intersections and nested-shell solid interpretation are not checked.",
          "Slicer settings, supports, strength and actual print success are not checked.",
          "Printer fit skipped: no printer selected."
        ]
      }
    },
    {
      "name": "circle-72-segments.stl",
      "sha256": "0ea5178a999f12014889f1008e05b03da137ece0e590a20e86ce962b6c892a49",
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      "segments": 72,
      "analytical": {
        "radiusMm": 10,
        "heightMm": 20,
        "sagittaMm": 0.009517784181422018,
        "volumeMm3": 6275.213477831388
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      "independentlyReopened": {
        "count": 288,
        "bounds": [
          {
            "min": -10,
            "max": 10
          },
          {
            "min": -10,
            "max": 10
          },
          {
            "min": 0,
            "max": 20
          }
        ],
        "signedVolume": 6275.213559930391
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      "localCheck": {
        "dimensionsMm": {
          "width": 20,
          "height": 20,
          "depth": 20
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        "triangles": 288,
        "topology": {
          "openEdges": 0,
          "nonManifoldEdges": 0,
          "degenerateTriangles": 0,
          "duplicateTriangles": 0,
          "shells": 1,
          "orientationConflicts": 0,
          "volume": 6275.213559930398,
          "volumeReliable": true
        },
        "fit": null,
        "thickness": {
          "method": "Bounded triangle-centroid normal rays",
          "samples": 288,
          "measured": 288,
          "unmeasured": 0,
          "belowThreshold": 0,
          "minimumMm": 19.980953869773966,
          "thresholdMm": 1.2
        },
        "skipped": [
          "Self intersections and nested-shell solid interpretation are not checked.",
          "Slicer settings, supports, strength and actual print success are not checked.",
          "Printer fit skipped: no printer selected."
        ]
      }
    }
  ],
  "implementations": [
    {
      "source": "src/app/features/repeat-workflows/mesh-workflows.ts",
      "sha256": "cf5cdca541537405fc148925329ed621f060c7f50b6b6c275716cbb53c9f1d66"
    },
    {
      "source": "src/app/features/stl-reducer/stl-reducer.ts",
      "sha256": "566ff7b88bf0501d48bff54934d9d4a0fa6ee8002612a2277c0c6f5ed055acc7"
    },
    {
      "source": "src/app/features/stl-print-preflight/stl-print-preflight-analysis.ts",
      "sha256": "486e156a0a52c5660cad3019b97b8368c7e7fe17843f201f624061a791fef6fe"
    }
  ],
  "rights": "Original InspectMesh mathematical controls and diagrams, CC0-1.0. No physical validation."
}