Before an agent exports a 3D mesh: a 10 × 20 × 30 unit check
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Guide
Disclosure: I build CELL FACTORY. This is a reproducible example using our already-public browser-local 3D editor, not a customer case or an engineering certification.
A triangle mesh is not a validated manufactured part. Before passing an exported model to another tool, test dimensions, units and what the export actually contains.
Try this small round-trip check:
- Open the editor below with the caliper starting template.
- In Parts, select the last part and Remove part; repeat until only the first part remains. Choose Box as its shape.
- Set position X/Y/Z to 0 and rotation X/Y/Z to 0. Set width=10, height=20 and depth=30. The editor uses millimetres.
- Export OBJ. Read the vertex coordinates and compute max minus min on each axis. The expected extents are 10, 20 and 30. This checks the numeric geometry, not whether the part meets a design standard.
- Export STL and explicitly select millimetres when importing downstream. STL has no standardized unit field; the filename or a solid name is not a reliable unit declaration.
- Save the JSON project, remove the part or edit a dimension, then load the project and check the extents again.
The editor has 20 original starting templates and editable component meshes. Those are 20 templates in one tool, not 20 separate CAD systems. They approximate shapes; they are not verified manufacturer models. Intersecting bodies may remain separate meshes. Export does not certify watertightness, print readiness, mechanical strength or fit.
This 10 × 20 × 30 OBJ example was independently run in Chromium against the public editor and produced those three extents. It is a synthetic software check, not field validation. The browser supports local project import/export; do not put private customer models in a public discussion.
What small unit or geometry test do you run before an agent hands an exported mesh to a downstream application?