fougue/mayo

3D CAD viewer and converter based on Qt + OpenCascade

Developer toolsC++#cad#opencascade#iges#step#brep

1.5 Steady Magnitude out of 10. Star growth looks organic. Data as of September 18, 2026.

About the project

Open-source 3D CAD viewer and converter built on Qt and OpenCascade that reads and writes STEP, IGES, STL, BREP, glTF and other CAD formats. Aimed at engineers and developers who need to view, measure and batch-convert 3D models on Windows, Linux and macOS.

Useful for

Open a STEP assembly and measure lengths, angles and bounding boxes of parts
Batch-convert CAD files from STEP to STL or glTF via the command-line utility
Enable clip planes and explode the assembly to inspect internal parts of a complex model

README summarized by DeepSeek V4.1 Flash. Details may be inaccurate.

Why it’s trending

5 stars so far today, about 6 expected by the end of the day.
The spike has held for 3 days in a row — not a one-off blip.

Stars per day

Bars are daily stars, the line is the usual pace. Red marks spike days.

Numbers

Total stars: 2,217
Stars in a day: 6
Forks: 359
Issues and pull requests: 391
Watchers: 60
Language: C++
License: BSD-2-Clause
Latest release: v0.10.0 · July 3, 2026
Created: July 29, 2016
Last push: September 18, 2026

Star trust

Growth looks organic: forks and discussion are in line with active projects, and stars arrive unevenly, the way people give them.

These are heuristics, not a verdict: we judge by the repository’s behavior, not by a list of stargazers.

Spotted in

September 18, 2026GitHub Trending C++ today: #17, +10 stars
September 17, 2026GitHub Trending C++ today: #17, +8 stars

README badge

Paste it into your README — the badge shows the current magnitude and links to this page.

[![Seismograph](https://gitnova.dev/badge/fougue/mayo.svg?lang=en)](https://gitnova.dev/en/r/fougue/mayo)

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