用Rust编写的时域有限差分(FDTD)模拟器_rems_rems_下.zip

   ```rems``` (Rust ElectroMagnetic Simulator) is a [Finite Difference Time Domain](https://en.wikipedia.org/wiki/Finite-difference_time-domain_method) (FDTD) simulator written in Rust. It is capable of generating animated graphs of your simulations, like this:  # Install ```rems``` is [available on crates.io](https://crates.io/crates/rems). You can install rems by first installing ```ffmpeg```, then [installing Rust](https://www.rust-lang.org/tools/install), and then using Rust's ```rustup``` tool to install Rust nightly, and then you can use ```cargo``` to install rems: ``` $ rustup install nightly $ rustup override set nightly # Be sure to read the output of this command and adjust your PATH as instructed. $ cargo install rems ``` # Quick start To get started with a quick simulation, have a look at the [examples/](https://github.com/bowlofeggs/rems/blob/master/examples) folder. You will find two files in there. ```1d_simulation.yml``` file is a simulation parameter file, and ```1d_signal.py``` is a Python script that generates a signal in the format that rems expects. Install Python's bson library, run the signal generator file, and then run the simulation: ``` $ pip install bson $ python3 examples/1d_signal.py $ rems examples/1d_simulation.yml ``` This will generate a video file on your system called ```simulation.mp4``` that will show you the signal propagating in space. Good job! # Simulation parameter configuration REMS expects you to define a simulation by providing it with a YAML file describing all the parameters. Here is an example config showing all available options, with commented default options: ``` --- # How many dimensions we have in space. Right now, only 1 is supported. dimensions: 1 # Define a list of signals signals: # This signal is at location 600 in space - location: 600 # Read this path to get the signal. See below for a description of this file. path: examples/1d_signal.bson # Define how large the universe should be, in cells size: 1920 # Define how many time steps the simulation should run for time: 32768 # This is a list of oscilloscopes, or outputs for your simulation. Right now, only the movie # type is supported, but one could imagine other types added in the future. oscilloscopes: - type: movie # How large of a magnitude to use for the y-axis on the graphs # range: 1.0 # The path to write the movie to path: examples/1d_simulation.mp4 # The framerate of the resulting movie, in Hz # framerate: 60 # How often to generate a graph in simulation time steps # graph_period: 16 # The resolution you desire for the resulting video, expressed as an array of two integers # resolution: # - 1920 # - 1080 # How many snapshots to buffer in memory before handing them off to a Python subprocess to # generate graphs out of them. # snapshot_buffer_len: 47 ``` # The signal BSON file The signals should be defined in a BSON file, with three fields: ```ex```, ```_version```, and ```dimensions```. ```_version``` should be set to 0, ```dimensions``` should be set to 1, and ```ex``` should be an array of floating point numbers that express which value the signal should have for each time step in the simulation. Here is a YAML example that corresponds in spirit to that schema: ``` --- _version: 0 dimensions: 1 ex: - 0.0 - 0.1 - 0.2 - 0.3 ``` # Links * [Bugs](https://github.com/bowlofeggs/rems/issues) * [Changelog](https://github.com/bowlofeggs/rems/blob/master/CHANGELOG.md) * [Code](https://github.com/bowlofeggs/rems) * [Documentation](https://docs.rs/rems) # Contribute If you would like to contribute to rems, send me a patch! There is a Makefile that is handy for development if you have podman on your system. It's default target is a help that shows the various targets that are available. ``` # Note that root is not required. $ make check ``` Happy hacking!