Updated dependencies to support WebAssembly

Cargo.toml

@@ -12,18 +12,23 @@ Kessler is a library for simulating fragmentation events in low Earth orbit.
 """
 
 [dependencies]
-blas-src = { version = "0.8", features = ["openblas"] }
-js-sys = "0.3.67"
-ndarray = { version = "=0.15.6", features = ["blas", "rayon", "serde"] }
-ndarray-linalg = "0.14"
+ndarray = { version = "0.15.6", features = ["rayon", "serde"] }
 ndarray-rand = "0.13.0"
-openblas-src = { version = "0.10", features = ["cblas", "system"] }
 rand = "0.8.5"
 rand_distr = "0.4.3"
 serde = { version = "1.0", features = ["derive"] }
 serde-wasm-bindgen = "0.4"
 wasm-bindgen = { version = "0.2.90", features = ["serde"]}
 
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+blas-src = { version = "0.8", features = ["openblas"] }
+ndarray-linalg = "0.14"
+openblas-src = { version = "0.10", features = ["cblas", "system"] }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+js-sys = "0.3.67"
+getrandom = { version = "0.2", features = ["js"] }
+
 [lib]
 crate-type = ["cdylib", "rlib"]
 

src/event.rs

@@ -1,7 +1,6 @@
 use crate::satellite::{SatKind, Satellite};
 
 use ndarray::*;
-use ndarray_linalg::*;
 use wasm_bindgen::prelude::*;
 
 pub trait FragmentationEvent {
@@ -96,7 +95,7 @@ impl FragmentationEvent for CollisionEvent {
         // Determine impact velocity
         let v1 = satellite_1.get_velocity();
         let v2 = satellite_2.get_velocity();
-        let v_impact = (Array1::from_vec(v1) - Array1::from_vec(v2)).norm();
+        let v_impact = norm(Array1::from_vec(v1) - Array1::from_vec(v2));
 
         // Target is the larger satellite
         let m_targ = satellite_1.mass;
@@ -198,3 +197,8 @@ impl FragmentationEvent for ExplosionEvent {
         [0.2, 1.85]
     }
 }
+
+// Calculate the l-2 norm of an array
+fn norm(arr: Array1<f32>) -> f32 {
+    arr.iter().map(|x| x.powi(2)).sum::<f32>().sqrt()
+}