Learning Gmsh Geometry Inspection

Gmsh Geometry Inspection

Level

Beginner to advanced.

Audience

Geometry users, mesh-generation learners, and developers studying adapter behavior.

Learning objectives

By the end, you can:

1. inspect a Gmsh .geo file;
2. describe what geometry evidence CaeReflex can extract;
3. avoid treating geometry inspection as mesh or design validation; and
4. connect adapter output to the ReflexCase model.

Files used

• examples/gmsh_minimal/t1.geo
• Architecture: Adapters
• Developer Guide: Adding Adapters

Walkthrough

caereflex inspect-gmsh examples/gmsh_minimal/t1.geo --out gmsh_case.json
caereflex export markdown gmsh_case.json --out gmsh_report.md

Review the report:

sed -n '1,140p' gmsh_report.md

What to observe

• The input is a geometry script, not a completed engineering validation package.
• CaeReflex can record file evidence, detected format, and adapter findings.
• Any downstream mesh adequacy or physical suitability claim requires independent engineering review.

Expected output and interpretation

A representative gmsh_case.json for examples/gmsh_minimal/t1.geo should include geometry-script evidence like this:

{
  "case_name": "t1",
  "case_type": "gmsh",
  "detected_formats": [".geo"],
  "detected_tools": ["Gmsh"],
  "source_files": [
    {"relative_path": "t1.geo", "suffix": ".geo", "hash_status": "complete"}
  ],
  "assets": [
    {
      "asset_type": "geometry",
      "name": "t1.geo",
      "metrics": {"points_declared": 4, "lines_declared": 4, "surfaces_declared": 2, "physical_groups": 2}
    }
  ]
}

Interpret the output as follows:

• Extracted evidence: the .geo suffix, file hash status, declared points, lines, surfaces, and physical groups come from examples/gmsh_minimal/t1.geo.
• Inferred context: case_type: "gmsh", detected_tools: ["Gmsh"], and asset_type: "geometry" are adapter classifications based on the input file.
• Warnings: any warning about missing mesh-reader support or partial parsing should be treated as a review prompt, not hidden from learners.
• Provenance: a full case includes events such as gmsh_inspection_started with the inspected path.
• Unsafe claims to avoid: do not claim that a mesh was generated, mesh quality is acceptable, geometry is watertight, boundary groups are physically correct, or the design is validated.

Beginner exercise

Identify the inspected source file, detected format, and generated output file.

Practitioner exercise

Explain which facts came from the .geo file and which statements would be unsafe to infer.

Expert extension

Read the Gmsh adapter and answer:

1. Which fields are extracted directly?
2. Which limitations should appear in the report or agent context?
3. How would optional Gmsh SDK support change inspection without breaking base imports?

Assessment checklist

• The learner inspected the Gmsh example.
• The learner can describe geometry evidence without claiming mesh adequacy.
• The learner identifies where adapter responsibilities end.