DimensionFaceMatcher

DimensionFaceMatcher is a prototype matcher for linking 2D drawing dimensions to 3D B-rep face pairs.

It does not require SolidWorks or AutoCAD at runtime. It consumes:

section_brep_report.json from tools/model-diagnostics/SectionBrepExtractor
a normalized 2D dimension anchor JSON file

The matcher projects each 3D face center and BBox into the selected drawing view, normalizes both 2D and projected 3D coordinates by their overall bounds, and ranks face pairs by:

dimension value match
projected position match for the two dimension anchors
projected BBox similarity
owner component hints
face type and coarse relation semantics

Run

dotnet run --project tools\drawing-diagnostics\DimensionFaceMatcher\DimensionFaceMatcher.csproj -- `
  --brep-report tools\drawing-diagnostics\DimensionFaceMatcher\examples\minimal_brep_report.json `
  --dimensions tools\drawing-diagnostics\DimensionFaceMatcher\examples\minimal_dimensions.json `
  --view-direction +Z `
  --roll 0 `
  --output-dir runtime\dimension-face-matcher-smoke

Output:

runtime\dimension-face-matcher-smoke\dimension_face_matches.json

Dimension Input

{
  "view": {
    "direction": "+X",
    "rollDeg": 270,
    "drawingBBox": { "minX": 0, "minY": 0, "maxX": 300, "maxY": 200 }
  },
  "dimensions": [
    {
      "id": "dim_001",
      "text": "Phi30 H7/h6",
      "measurementMm": 30,
      "kind": "cylindrical_fit",
      "ownerComponents": ["shaft", "bearing"],
      "anchors": [
        { "id": "a", "bbox": { "minX": 10, "minY": 20, "maxX": 10, "maxY": 60 } },
        { "id": "b", "bbox": { "minX": 45, "minY": 20, "maxX": 45, "maxY": 60 } }
      ]
    }
  ]
}

Supported kind values:

cylindrical_fit
diameter
plane_distance
linear_distance
axis_distance

If kind is missing, the matcher infers a coarse type from the dimension text.

Notes

This first version intentionally uses approximate projection:

face center projection
face BBox corner projection
cylinder diameter/radius and axis metadata
plane normal and center distance

It does not compute exact visible outlines, hidden-line occlusion, or tangent/silhouette curves. Those should be added later through SolidWorks drawing-view entity references if higher confidence is needed.