Workbench / Examples

Files with an answer you can check

These experiments start with known geometry. Compare the expected result with the measured output, download the actual files, and inspect what each check leaves unresolved.

• A missing face and a duplicated face give different findings

  A missing face and a duplicated face can both make a mesh unsuitable for an intended solid, but they produce different edge findings. These files change one face of the same right tetrahedron, so the expected counts can be worked out before running the checker.

• One reversed face, three inconsistent edges

  Reversing one face of a closed tetrahedron leaves the four triangles in the same positions. It changes the direction of the three shared edges around that face. With four faces, you can count the affected edges before opening the file.

• One coordinate unit becomes one inch

  A coordinate value of one does not say whether a part measures one inch or one millimetre. The source STL here spans exactly one coordinate unit along each axis. The experiment assigns inches, then exports a 3MF that explicitly records millimetres.

• The same four triangles in STL, 3MF, and OBJ

  A ten-millimetre right tetrahedron takes different amounts of space in three mesh containers. With just four triangles, indexing and container overhead account for much of the difference; the result does not rank the formats for larger models. Each downloadable file was created by this project.

• JSON and binary glTF for the same geometry

  Binary and JSON glTF can carry the same geometry while packaging their buffers differently. These two self-contained files represent a ten-millimetre tetrahedron with four triangles. Neither sample contains textures, animation, or an external resource dependency.

• Three tessellations of an analytic cylinder

  A cylinder supplies a curved reference whose radius is known independently of the generated mesh. Holding angular deflection fixed lets this experiment show what changes when the requested linear deflection becomes finer. The table records each output rather than assuming the requested tolerance is a measured error.

• One cylinder imported from STEP and IGES

  The two source files describe the same analytic cylinder, exported as STEP and IGES. Their matched mesh results make a reproducible import example with a known physical scale. The known radius and height provide independent checks on the imported mesh.

• Mesh-to-STEP keeps planar faces

  A STEP file can contain planar faces reconstructed from a mesh. This example writes a tetrahedron and inspects the resulting entities to distinguish a successful container conversion from recovery of a CAD design. The source shape is already planar, so no curved surface is needed.

All sample geometry is project-created and available under CC0. No visitor models enter this collection. The recorded hashes distinguish these exact outputs from files generated by a different writer version or setting.