Move to serde to allow for better coordinate changing

Cargo.lock

@@ -2722,6 +2722,7 @@ dependencies = [
  "nd_array",
  "num-integer",
  "rand",
+ "serde",
 ]
 
 [[package]]

Cargo.toml

@@ -37,6 +37,7 @@ nd_array = "0.1.0"
 num-integer = "0.1.45"
 rand = { version = "0.8.5", features = ["default", "small_rng"] }
 csv = "1.1"
+serde = { version = "1.0.152", features = ["derive"] }
 
 [build-dependencies]
 cbindgen = "0.24.3"

src/system/mod.rs

@@ -1,4 +1,5 @@
 use std::ops::Add;
+use serde::{Serialize, Deserialize};
 
 pub mod walker;
 pub mod storage;
@@ -6,16 +7,23 @@ pub mod model;
 
 pub(crate) const DIM: u32 = 2;
 
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct Position(pub i32, pub i32);
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Position {
+    x: i32,
+    y: i32,
+}
 
 impl Position {
+    pub fn zero() -> Position {
+        Position { x: 0, y: 0 }
+    }
+
     pub fn abs(&self) -> f32 {
-        ((self.0.pow(2) + self.1.pow(2)) as f32).powf(0.5)
+        ((self.x.pow(2) + self.y.pow(2)) as f32).powf(0.5)
     }
 
     pub fn in_direction(direction: u32, value: i32) -> Self {
-        if direction == 0 { Position(value, 0) } else { Position(0, value) }
+        if direction == 0 { Position { x: value, y: 0 } } else { Position { x: 0, y: value } }
     }
 
     pub fn neighbours(&self) -> impl Iterator<Item=Self> + '_ {
@@ -32,6 +40,6 @@ impl Add for Position {
     type Output = Position;
 
     fn add(self, rhs: Self) -> Self::Output {
-        Position(self.0 + rhs.0, self.1 + rhs.1)
+        Position { x: self.x + rhs.x, y: self.y + rhs.y }
     }
 }

src/system/model.rs

@@ -7,6 +7,7 @@ use rand::prelude::*;
 use crate::system::{DIM, Position};
 use crate::system::storage::{Storage, VectorStorage};
 use crate::system::walker::{LocalRandomWalker, Walker};
+use serde::{Serialize, Deserialize};
 
 pub struct DLASystem<R: Rng, S: Storage, W: Walker<R>> {
     rng: R,
@@ -49,7 +50,7 @@ impl<R: Rng, S: Storage, W: Walker<R>> DLASystem<R, S, W> {
             cluster_radius: 0.0,
         };
 
-        sys.deposit(&Position(0, 0));
+        sys.deposit(&Position::zero());
 
         sys
     }
@@ -97,7 +98,7 @@ impl<R: Rng, S: Storage, W: Walker<R>> DLASystem<R, S, W> {
     fn spawn_particle(&mut self) {
         let theta = self.rng.gen_range(0f32..1.0) * 2.0 * PI;
         let (x, y) = (self.add_circle * theta.cos(), self.add_circle * theta.sin());
-        let position = Position(x as i32, y as i32);
+        let position = Position { x: x as i32, y: y as i32 };
 
         if !self.storage.at(&position) {
             self.active_particle = Some(position);
@@ -121,13 +122,13 @@ impl<R: Rng, S: Storage, W: Walker<R>> DLASystem<R, S, W> {
     }
 
     pub fn export_data(&self, path: &Path) -> io::Result<()> {
-        let mut file = File::create(path)?;
-        writeln!(&mut file, "x, y")?;
+        let mut wtr = csv::Writer::from_path(path)?;
 
         for particle in &self.particles {
-            writeln!(&mut file, "{}, {}", particle.0, particle.1)?;
+            wtr.serialize(particle)?;
         }
 
+        wtr.flush()?;
         Ok(())
     }
 }

src/system/storage.rs

@@ -17,11 +17,11 @@ impl VectorStorage {
     }
 
     pub fn linear_index(&self, position: &Position) -> usize {
-        assert!(position.0 <= self.grid_size as i32 && -(self.grid_size as i32) <= position.0);
-        assert!(position.1 <= self.grid_size as i32 && -(self.grid_size as i32) <= position.1);
+        assert!(position.x <= self.grid_size as i32 && -(self.grid_size as i32) <= position.x);
+        assert!(position.y <= self.grid_size as i32 && -(self.grid_size as i32) <= position.y);
 
-        let x = (position.0 + (self.grid_size as i32) / 2) as usize;
-        let y = (position.1 + (self.grid_size as i32) / 2) as usize;
+        let x = (position.x + (self.grid_size as i32) / 2) as usize;
+        let y = (position.y + (self.grid_size as i32) / 2) as usize;
 
         return self.grid_size as usize * y + x
     }