BIG rewrite and changes (too many to list)

TODO.md

@@ -1,13 +1,20 @@
 ### Todo:
-- Auto create a mp4 from generate images
-    - Instead of using the command `ffmpeg -r 20 -i tmp/out_%d.png -vcodec libx265 -crf 25 -s 512x512 test.mp4` maybe use a rust library to do the same (more research needed)
-- GPU compute 
+1. `grid.rs`
+    - Remove need for `deposit`/`deposit_all`
+      - Possible solution: Make it so when data is called, it generates it in a function when needed
+2. GPU compute 
     - Tried [ArrayFire-rust](https://github.com/arrayfire/arrayfire-rust) didn't work well, looking for another library
     - Try using [emu](https://github.com/calebwin/emu) (seems to be a very good option)
-- sin and cos optimizations
-    - sin/cos table?
-- Make colisions for walls of grid
-- Add config and cmd arguments when running the binary to adjust simulation settings
-- Rewrite `grid.rs`
-    - Move agent list to grid type
-    - Remove need for `deposit` function
+      - emu seems to be the way to go
+      - May have to completely rewrite simulation to run on the gpu (that'll be fun *pain*)
+3. Auto create a video from generated images
+    - Instead of using the command `ffmpeg -r 20 -i tmp/out_%d.png -vcodec libx265 -crf 25 -s 512x512 test.mp4` maybe use a rust library to do the same (more research needed)
+4. Live output
+   - Might want to do after #3 ("Auto create a video from generated images")
+5. Make collisions for walls of grid
+6. Add config and cmd arguments when running the binary to adjust simulation settings7.
+7. sin and cos optimizations
+    - sin/cos table
+      - precompute before simulation
+    - Cache sin/cos values in hashmap to be recalled later
+      - In order to peruse this route, I have to figure out how to access a hashmap in parallel

src/agent.rs

@@ -22,12 +22,8 @@ impl Display for Agent {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         write!(
             f,
-            "{{\n (x,y): ({},{})\n angle: {}\n population id: {}, i: {} }}",
-            self.x,
-            self.y,
-            self.angle,
-            self.population_id,
-            self.i,
+            "{{\n(x,y): ({},{})\nangle: {}\npopulation id: {}\ni: {}}}",
+            self.x, self.y, self.angle, self.population_id, self.i,
         )
     }
 }

src/grid.rs

@@ -4,8 +4,8 @@ use crate::{
 };
 
 use rand::{distributions::Uniform, Rng};
-
 use std::fmt::{Display, Formatter};
+use rayon::{iter::ParallelIterator, prelude::*};
 
 // A population configuration.
 #[derive(Debug)]
@@ -159,6 +159,22 @@ impl Grid {
         );
     }
 
+    #[inline]
+    pub fn tick(&mut self) {
+        let self_immutable = self.clone();
+        self.agents.par_iter_mut().for_each(|agent| {
+            agent.tick(&self_immutable);
+        });
+    }
+
+    #[inline]
+    pub fn deposit_all(&mut self) {
+        let agent_list = self.agents.clone();
+        for agent in agent_list.iter() {
+            self.deposit(agent.x, agent.y);
+        }
+    }
+
     // No longer needed (moved to imgdata.rs)
     /*
     pub fn quantile(&self, fraction: f32) -> f32 {

src/main.rs

@@ -11,8 +11,8 @@ fn main() {
     // let (width, height) = (1024, 1024);
 
     // # of agents
-    let n_particles = 1 << 10;
-    // let n_particles = 1 << 16;
+    // let n_particles = 1 << 10;
+    let n_particles = 1 << 16;
     println!("n_particles: {}", n_particles);
 
     let diffusivity = 1;

src/model.rs

@@ -118,23 +118,16 @@ impl Model {
             // Combine grids
             let grids = &mut self.grids;
             combine(grids, &self.attraction_table);
-            let grids_immutable_1 = &grids.clone();
-
             let agents_tick_time = Instant::now();
 
             // Tick agents
             for grid in grids.iter_mut() {
-                grid.agents.par_iter_mut().for_each(|agent| {
-                    agent.tick(&grids_immutable_1[agent.population_id]);
-                });
+                grid.tick();
             }
 
             // Deposit
-            let grids_immutable_2 = &grids.clone();
-            for grid in grids_immutable_2.iter() {
-                for agent in grid.agents.iter() {
-                    self.grids[agent.population_id].deposit(agent.x, agent.y);
-                }
+            for grid in self.grids.iter_mut() {
+                grid.deposit_all();
             }
 
             // Diffuse + Decay

src/util.rs

@@ -1,4 +1,4 @@
-#[inline(always)]
+#[inline]
 pub fn wrap(x: f32, max: f32) -> f32 {
     x - max * ((x > max) as i32 as f32 - (x < 0.0_f32) as i32 as f32)
 }