rssn 0.2.9

A comprehensive scientific computing library for Rust, aiming for feature parity with NumPy and SymPy.
Documentation 
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//! Handle-based FFI API for physics sim FDTD electrodynamics functions.

use crate::numerical::matrix::Matrix;
use crate::physics::physics_sim::fdtd_electrodynamics::FdtdParameters;
use crate::physics::physics_sim::fdtd_electrodynamics::{
    self,
};

/// Runs a 2D FDTD simulation and returns the final Ez field as a Matrix handle (`WxH`).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_physics_sim_fdtd_run_2d(
    width: usize,
    height: usize,
    time_steps: usize,
    source_x: usize,
    source_y: usize,
    source_freq: f64,
) -> *mut Matrix<f64> {
    let params = FdtdParameters {
        width,
        height,
        time_steps,
        source_pos: (source_x, source_y),
        source_freq,
    };

    let snapshots = fdtd_electrodynamics::run_fdtd_simulation(&params);

    if let Some(final_ez) = snapshots.last() {
        let rows = final_ez.nrows();

        let cols = final_ez.ncols();

        let (data, _offset) = final_ez.clone().into_raw_vec_and_offset();

        Box::into_raw(Box::new(Matrix::new(rows, cols, data)))
    } else {
        std::ptr::null_mut()
    }
}