commit 9cc9512771ce3433c7a7780697517150d520cbbf
Author: nkoch001 <nilskoch94@gmail.com>
Date:   Thu Jan 24 18:20:02 2019 +0100

    initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..53eaa21
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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+**/*.rs.bk
diff --git a/Cargo.lock b/Cargo.lock
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index 0000000..65c23f3
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..0542df5
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "rustic_swarm"
+version = "0.1.1"
+authors = ["Cpt.Captain <nilskoch94@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+rand = "0.6"
+piston = "0.40.0"
+piston2d-graphics = "0.29.0"
+pistoncore-glutin_window = "0.52.0"
+piston2d-opengl_graphics = "0.58.0"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..fd2672b
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,288 @@
+extern crate glutin_window;
+extern crate graphics;
+extern crate opengl_graphics;
+extern crate piston;
+extern crate rand;
+
+use glutin_window::GlutinWindow as Window;
+use opengl_graphics::{GlGraphics, OpenGL};
+use piston::event_loop::*;
+use piston::input::*;
+use piston::window::WindowSettings;
+use rand::seq::SliceRandom;
+use std::f64::consts::PI;
+
+pub struct App {
+    gl: GlGraphics,
+}
+
+#[derive(Clone)]
+pub struct Object {
+    color: [f32; 4],
+    rotation: f64,
+    pos: Vec<f64>,
+    vel: Vec<f64>,
+    border_dist: Vec<f64>,
+    window_size: Vec<f64>,
+}
+
+impl App {
+    fn render(&mut self, objs: &[Object], args: &RenderArgs) {
+        use graphics::*;
+        const BLACK: [f32; 4] = [0.1, 0.1, 0.1, 0.0];
+
+        //         let square = rectangle::square(0.0, 0.0, 50.0);
+        let square = rectangle::centered([0.0, 0.0, 40.0, 25.0]);
+
+        self.gl.draw(args.viewport(), |c, gl| {
+            clear(BLACK, gl);
+
+            for obj in objs {
+                let transform = c
+                    .transform
+                    .trans(obj.pos[0], obj.pos[1])
+                    .rot_rad(obj.rotation)
+                    .trans(-35.0, -12.5);
+
+                rectangle(obj.color, square, transform, gl);
+            }
+        });
+    }
+}
+
+fn calc_amount(vec: &mut Vec<f64>) -> f64 {
+    (vec[0].powi(2) + vec[1].powi(2)).sqrt()
+}
+
+impl Object {
+    pub fn new(
+        color: [f32; 4],
+        rotation: f64,
+        pos: Vec<f64>,
+        vel: Vec<f64>,
+        border_dist: Vec<f64>,
+        window_size: Vec<f64>,
+    ) -> Object {
+        Object {
+            color,
+            rotation,
+            pos,
+            vel,
+            border_dist,
+            window_size,
+        }
+    }
+
+    pub fn new_rand(color: [f32; 4]) -> Object {
+        Object::new(
+            color,
+            rand::random::<f64>(),
+            vec![rand::random::<f64>(); 2],
+            vec![rand::random::<f64>(); 2],
+            vec![rand::random::<f64>(); 2],
+            vec![0.0, 0.0],
+        )
+    }
+
+    fn get_pos(&mut self) -> Vec<f64> {
+        self.pos.clone()
+    }
+
+    fn update_border_dist(&mut self, args: &RenderArgs) {
+        self.window_size = vec![args.width, args.height];
+
+        let mut middle: Vec<f64> = Vec::new();
+        for size in &self.window_size {
+            middle.push(size / 2.0);
+        }
+
+        for (i, pos) in &mut self.pos.iter().enumerate() {
+            if pos < &mut middle[i as usize] {
+                self.border_dist[i as usize] = *pos;
+            } else {
+                self.border_dist[i as usize] = self.window_size[i as usize] - *pos;
+            }
+        }
+    }
+
+    fn edge_repel(weighted_bd: f64, vel: f64, limiter: f64) -> f64 {
+        rand::random::<f64>() * 0.1 * vel.abs().round().min(4.0).max(2.0) / weighted_bd.max(limiter)
+    }
+
+    fn mouse_attract(&mut self, mouse_pos: [f64; 2]) {
+        let pos: Vec<f64> = self.get_pos();
+        let mut dist: Vec<f64> = vec![pos[0] - mouse_pos[0], pos[1] - mouse_pos[1]];
+        let amount = calc_amount(&mut dist);
+        for (i, d) in dist.iter().enumerate() {
+            self.vel[i] -= 0.2 * d / amount.max(0.1);
+            self.vel[i] = self.vel[i].min(10.0).max(-10.0);
+        }
+    }
+
+    fn attract(&mut self, objs: &mut Vec<Vec<f64>>) {
+        let this_pos: Vec<f64> = self.get_pos();
+        let mut distances: Vec<Vec<f64>> = Vec::new();
+        for obj_pos in objs {
+            let mut dist_vec: Vec<f64> = Vec::new();
+            for (i, op) in obj_pos.iter().enumerate() {
+                dist_vec.push(op - this_pos[i]);
+            }
+            distances.push(dist_vec);
+        }
+        for mut dist in distances {
+            let amount = calc_amount(&mut dist);
+            for (i, d) in dist.iter().enumerate() {
+                self.vel[i] += 1.0 * (d / amount.max(0.01));
+            }
+        }
+    }
+
+    fn repel(&mut self, obj_pos: &mut Vec<Vec<f64>>) {
+        let this_pos: Vec<f64> = self.get_pos();
+        for pos in obj_pos {
+            let mut dist_vec: Vec<f64> = Vec::new();
+            for i in 0..2 {
+                dist_vec.push(this_pos[i] - pos[i]);
+            }
+            let amount = calc_amount(&mut dist_vec);
+
+            for (i, d) in dist_vec.iter().enumerate() {
+                self.vel[i] += 1.5 * d.min(150.0).max(-150.0) / (amount).max(0.01);
+            }
+        }
+    }
+
+    fn calc_vel(&mut self) -> Vec<f64> {
+        let mut vel: Vec<f64> = Vec::new();
+        for i in 0..2 {
+            let weighted_bd: f64 = self.border_dist[i] / (self.window_size[i] / 2.0);
+            let mut change = Object::edge_repel(weighted_bd, self.vel[i], 0.1);
+            change *= change;
+            if self.pos[i] > self.window_size[i] / 2.0 {
+                change = -change;
+            }
+            vel.push(self.vel[i] + (change * weighted_bd))
+        }
+        vel
+    }
+
+    fn update_vel(&mut self, new_vel: Vec<f64>) {
+        for (i, d) in new_vel.iter().enumerate() {
+            self.vel[i] = ((self.vel[i] + d) / 2.0).max(-10.0).min(10.0);
+        }
+        let amount = calc_amount(&mut self.vel);
+        for i in 0..2 {
+            self.vel[i] *= 10.0 / amount;
+        }
+    }
+
+    fn move_me(&mut self) {
+        for i in 0..2 {
+            if self.window_size[i] < self.pos[i] + self.vel[i] || self.pos[i] + self.vel[i] < 0.0 {
+                if self.pos[i] + self.vel[i] < 0.0 {
+                    self.pos[i] = self.window_size[i];
+                    self.vel[i] *= 0.2;
+                } else {
+                    self.pos[i] = 0.0;
+                }
+            }
+            self.pos[i] += self.vel[i];
+        }
+    }
+
+    fn calc_direction(&mut self) -> f64 {
+        let mut dir = (self.vel[0] / calc_amount(&mut self.vel)).acos();
+        if self.vel[1].signum() < 0.0 {
+            dir = 2.0 * PI - dir;
+        }
+        dir
+    }
+
+    fn update(&mut self) {
+        let new_vel = self.calc_vel();
+        self.update_vel(new_vel);
+        self.move_me();
+        let dir = self.calc_direction();
+        self.rotation = dir;
+    }
+}
+
+fn main() {
+    println!("Hello there!");
+    let mut m_attract = false;
+
+    const RED: [f32; 4] = [1.0, 0.0, 0.0, 0.8];
+    const GREEN: [f32; 4] = [0.0, 1.0, 0.0, 1.0];
+
+    const FRUNK: [f32; 4] = [0.0, 0.0, 1.0, 0.8];
+    const GNORM: [f32; 4] = [1.0, 1.0, 0.0, 0.8];
+
+    const WHITE: [f32; 4] = [1.0, 1.0, 1.0, 0.8];
+
+    let colors = [RED, FRUNK, GNORM, WHITE, GREEN];
+
+    let opengl = OpenGL::V3_2;
+
+    let num_objs = 12;
+
+    let mut window: Window = WindowSettings::new("Test", [200, 200])
+        .opengl(opengl)
+        .exit_on_esc(true)
+        .build()
+        .unwrap();
+
+    let mut app = App {
+        gl: GlGraphics::new(opengl),
+    };
+
+    let mut objects = Vec::new();
+    for _ in 0..num_objs {
+        objects.push(Object::new_rand(
+            *colors
+                .choose(&mut rand::thread_rng())
+                .expect("Color failure!"),
+        ))
+    }
+
+    let mut positions: Vec<Vec<f64>> = Vec::new();
+
+    let mut events = Events::new(EventSettings::new());
+    while let Some(e) = events.next(&mut window) {
+        if let Some(r) = e.render_args() {
+            for obj in &mut objects {
+                obj.update_border_dist(&r);
+                obj.update();
+                positions.push(obj.get_pos());
+            }
+            app.render(&objects, &r);
+        }
+
+        if let Some(_u) = e.update_args() {
+            for obj in &mut objects {
+                obj.attract(&mut positions);
+                obj.repel(&mut positions);
+            }
+            positions.clear()
+        }
+
+        if let Some(p) = e.press_args() {
+            if p == Button::Mouse(MouseButton::Left) {
+                m_attract = true;
+            }
+        }
+
+        if let Some(r) = e.release_args() {
+            if r == Button::Mouse(MouseButton::Left) {
+                m_attract = false;
+            }
+        }
+
+        if let Some(c) = e.mouse_cursor_args() {
+            if m_attract {
+                for obj in &mut objects {
+                    obj.mouse_attract(c);
+                }
+            }
+        }
+    }
+}