magnet_rs 0.2.3

User friendly magnetic field calculations in Rust
magnet_rs-0.2.3 is not a library.


License: MPL 2.0 License: CC BY-SA 4.0 build status crate documentation

Magnet_RS is a command line program to calculate the magnetic fields of any object or objects in 2D and 3D; along with any induced forces and torques. This uses the lodestone_core crate, which is a rewrite of a python package, pymagnet:

Github, or PyPi.


This binary reads a toml file containing the magnets and list of points to run the calculation over. This is then saved to a JSON file with the following keys:

  • magnets: an array of the magnets and their properties
  • points: points where the field is calculated
  • field: calculated magnetic field

Currently, only 2D features are available.


Run the demo calculation:

magnet_rs -d

which saves the computed field to example_out.json

The Python script in the data folder, will plot the resulting json file.

Reading input files

Save the following into input.toml

kind = "rectangle"
size = [1.0, 1.0]
center = [-1.0, -0.5]
magnetisation = [1.0, 90.0]
magAngle = "degrees"
alpha = 0.0
alphaAngle = "degrees"

kind = "rectangle"
size = [1.0, 1.0]
center = [1.0, -2.0]
magnetisation = [-1.0, 0.5]
magAngle = "degrees"
alpha = 0.0
alphaAngle = "degrees"

# Then define the type of grid for calculating over
kind = "grid"
start = [-2.0, -2.0]
stop = [2.0, 2.0]
numPoints = 101
units = "mm" # NOTE: Units are not yet implemented 

then run the following to save the data in a JSON file:

magnet_rs -i input.toml -o out.json


Source code licensed under the Mozilla Public License Version 2.0

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