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Emscripten converts C++ floats to doubles, which produces rounding errors. In the Graph application, when displaying y=sin(x), the ordinate '1' displayed "10" instead, because the exponent of 1000f was wrongly computed. To prevent this, we add the -s PRECISE_F32=1 flag, which uses 32-bits floating point values for floats. See https://kripken.github.io/emscripten-site/docs/getting_started/FAQ.html#why-do-i-get-odd-rounding-errors-when-using-float-variables
Epsilon is a high-performance graphing calculator operating system. It includes eight apps that cover the high school mathematics curriculum.
You can try Epsilon straight from your browser in the online simulator.
Diving in
We highly recommend you start by reading the online documentation for this project. You'll learn about:
- Installing the SDK
- The design decisions that were made
- The overall software architecture of the firmware
Contributing
If you run into an issue, we would be very happy if you would file a bug on the issue tracker.
We welcome contributions. For smaller changes just open a pull request straight away. For larger changes we recommend you open an issue first for discussion.
License
NumWorks Epsilon is released under a CC BY-NC-SA License. NumWorks is a registered trade mark.