separate out visualizer library

1 files changed, 373 insertions, 0 deletions

diff --git a/web/planetwars-rs/src/lib.rs b/web/planetwars-rs/src/lib.rs
new file mode 100644
index 0000000..f2ba7e1
--- /dev/null
+++ b/web/planetwars-rs/src/lib.rs
@@ -0,0 +1,373 @@
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
+extern crate octoon_math;
+extern crate serde_json;
+extern crate voronoi;
+
+use octoon_math::Mat3;
+use voronoi::{make_polygons, voronoi, Point};
+
+mod types;
+mod utils;
+
+use std::collections::HashMap;
+use wasm_bindgen::prelude::*;
+
+macro_rules! console_log {
+    // Note that this is using the `log` function imported above during
+    // `bare_bones`
+    ($($t:tt)*) => (log(&format_args!($($t)*).to_string()))
+}
+
+// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+// allocator.
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+#[derive(Debug, Clone)]
+pub struct Circle {
+    r: f32,
+    x: f32,
+    y: f32,
+    a0: f32,
+    ad: f32,
+    distance: usize,
+}
+
+use std::f32::consts::PI;
+fn spr(from: f32) -> f32 {
+    let pi2 = PI * 2.;
+    ((from % pi2) + pi2) % pi2
+}
+
+impl Circle {
+    pub fn new(p1: &types::Planet, p2: &types::Planet) -> Self {
+        let x1 = p1.x;
+        let y1 = p1.y;
+        let x2 = p2.x;
+        let y2 = p2.y;
+
+        // Distance between planets
+        let q = ((x2 - x1).powi(2) + (y2 - y1).powi(2)).sqrt();
+        // Center of between planets
+        let x3 = (x1 + x2) / 2.0;
+        let y3 = (y1 + y2) / 2.0;
+
+        // Radius of circle
+        let r = q * 1.0;
+
+        // Center of circle
+        let x = x3 + (r.powi(2) - (q / 2.0).powi(2)).sqrt() * (y1 - y2) / q;
+        let y = y3 + (r.powi(2) - (q / 2.0).powi(2)).sqrt() * (x2 - x1) / q;
+        // console_log!("{},{} -> {},{} ({},{} r={})", x1, y1, x2, y2, x, y, r);
+
+        let a0 = spr((y - y1).atan2(x - x1));
+        let a2 = spr((y - y2).atan2(x - x2));
+
+        let mut ad = spr(a0 - a2);
+        if ad > PI {
+            ad = spr(a2 - a0);
+        }
+        // console_log!("a1 {} a2 {} ad {}", a0/PI * 180.0, a2/PI * 180.0, ad/PI*180.0);
+
+        let distance = q.ceil() as usize + 1;
+        Self {
+            r,
+            x,
+            y,
+            a0,
+            ad,
+            distance,
+        }
+    }
+
+    pub fn get_for_remaining(&self, remaining: usize) -> ((Mat3<f32>, f32), (Mat3<f32>, f32)) {
+        (
+            self.get_remaining(remaining),
+            self.get_remaining((remaining + 1).min(self.distance - 1)),
+        )
+    }
+
+    fn get_remaining(&self, remaining: usize) -> (Mat3<f32>, f32) {
+        let alpha = self.a0 + (1.0 - (remaining as f32 / self.distance as f32)) * self.ad;
+
+        let cos = alpha.cos();
+        let sin = alpha.sin();
+        (
+            Mat3::new(
+                0.3,
+                0.0,
+                0.0,
+                0.0,
+                0.3,
+                0.0,
+                -self.x + cos * self.r,
+                -self.y + sin * self.r,
+                0.3,
+            ),
+            alpha,
+        )
+    }
+}
+
+fn create_voronoi(planets: &Vec<types::Planet>, bbox: f32) -> (Vec<f32>, Vec<usize>) {
+    let mut verts: Vec<[f32; 2]> = planets.iter().map(|p| [p.x, p.y]).collect();
+    let mut ids = Vec::new();
+
+    let vor_points = planets
+        .iter()
+        .map(|p| Point::new(p.x as f64, p.y as f64))
+        .collect();
+
+    let vor = voronoi(vor_points, bbox as f64);
+    let vor = make_polygons(&vor);
+
+    for poly in vor.iter() {
+        // Get planet index for planet that is inside this poligon
+        let idx = 0;
+
+        let mut prev = ids.len() + poly.len() - 1;
+        for p in poly.iter() {
+            let now = verts.len();
+            verts.push([p.x.0 as f32, p.y.0 as f32]);
+
+            ids.push(idx);
+            ids.push(now);
+            ids.push(prev);
+            prev = now;
+        }
+    }
+
+    (verts.concat(), ids)
+}
+
+#[wasm_bindgen]
+pub struct Game {
+    states: Vec<types::State>,
+    turn: usize,
+
+    planet_map: HashMap<(String, String), Circle>,
+
+    /* put extra shit here */
+    view_box: Vec<f32>,
+
+    planets: Vec<f32>,
+    planet_ships: Vec<usize>,
+
+    ship_locations: Vec<f32>,
+    ship_label_locations: Vec<f32>,
+    ship_colours: Vec<f32>,
+    ship_counts: Vec<usize>,
+
+    current_planet_colours: Vec<f32>,
+
+    voronoi_vertices: Vec<f32>,
+    voronoi_colors: Vec<f32>,
+    voronoi_indices: Vec<usize>,
+}
+
+#[wasm_bindgen]
+impl Game {
+    pub fn new(file: &str) -> Self {
+        utils::set_panic_hook();
+
+        // First line is fucked but we just filter out things that cannot parse
+        let states: Vec<types::State> = file
+            .split("\n")
+            .filter_map(|line| serde_json::from_str(line).ok())
+            .collect();
+
+        let mut planet_map = HashMap::new();
+
+        // Iterator?
+        for p1 in states[0].planets.iter() {
+            for p2 in states[0].planets.iter() {
+                planet_map.insert((p1.name.clone(), p2.name.clone()), Circle::new(&p1, &p2));
+            }
+        }
+        let view_box = utils::caclulate_viewbox(&states[0].planets);
+
+        let (voronoi_vertices, voronoi_indices) =
+            create_voronoi(&states[0].planets, view_box[2].max(view_box[3]));
+
+        let voronoi_colors: Vec<f32> = voronoi_indices
+            .iter()
+            .map(|_| [0.0, 0.0, 0.0])
+            .collect::<Vec<[f32; 3]>>()
+            .concat(); // Init these colours on black
+
+        Self {
+            planets: utils::get_planets(&states[0].planets, 2.0),
+            planet_ships: Vec::new(),
+            view_box,
+
+            planet_map,
+            turn: 0,
+            states,
+            ship_locations: Vec::new(),
+            ship_label_locations: Vec::new(),
+            ship_colours: Vec::new(),
+            ship_counts: Vec::new(),
+            current_planet_colours: Vec::new(),
+
+            voronoi_vertices,
+            voronoi_indices,
+            voronoi_colors,
+        }
+    }
+
+    pub fn push_state(&mut self, state_str: &str) {
+        if let Ok(state) = serde_json::from_str(state_str) {
+            self.states.push(state);
+        }
+    }
+
+    pub fn get_viewbox(&self) -> Vec<f32> {
+        self.view_box.clone()
+    }
+
+    pub fn get_planets(&self) -> Vec<f32> {
+        self.planets.clone()
+    }
+
+    pub fn get_planet_ships(&self) -> Vec<usize> {
+        self.planet_ships.clone()
+    }
+
+    pub fn get_planet_colors(&self) -> Vec<f32> {
+        self.current_planet_colours.clone()
+    }
+
+    pub fn turn_count(&self) -> usize {
+        self.states.len()
+    }
+
+    pub fn update_turn(&mut self, turn: usize) -> usize {
+        self.turn = turn.min(self.states.len() - 1);
+
+        self.update_planet_ships();
+        self.update_planet_colours();
+        self.update_voronoi_colors();
+        self.update_ship_locations();
+        self.update_ship_counts();
+
+        self.turn
+    }
+
+    fn update_planet_ships(&mut self) {
+        self.planet_ships = self.states[self.turn]
+            .planets
+            .iter()
+            .map(|p| p.ship_count as usize)
+            .collect();
+    }
+
+    fn update_voronoi_colors(&mut self) {
+        for (i, p) in self.states[self.turn].planets.iter().enumerate() {
+            let color = utils::COLORS[p.owner.unwrap_or(0) as usize % utils::COLORS.len()];
+            self.voronoi_colors[i * 3 + 0] = color[0];
+            self.voronoi_colors[i * 3 + 1] = color[1];
+            self.voronoi_colors[i * 3 + 2] = color[2];
+        }
+    }
+
+    fn update_planet_colours(&mut self) {
+        let mut new_vec: Vec<[f32; 3]> = Vec::new();
+        let planets_now = self.states[self.turn].planets.iter();
+        let planets_later = self.states[(self.turn + 1).min(self.states.len() - 1)]
+            .planets
+            .iter();
+
+        for (p1, p2) in planets_now.zip(planets_later) {
+            new_vec
+                .push(utils::COLORS[p1.owner.unwrap_or(0) as usize % utils::COLORS.len()].into());
+            new_vec
+                .push(utils::COLORS[p2.owner.unwrap_or(0) as usize % utils::COLORS.len()].into());
+        }
+
+        self.current_planet_colours = new_vec.concat::<f32>();
+    }
+
+    fn update_ship_locations(&mut self) {
+        let mut new_sl = Vec::new();
+        let mut new_sll = Vec::new();
+
+        let t = Mat3::new(0.2, 0., 0., 0., 0.2, 0.0, 0., -0.5, 0.2);
+
+        for ship in self.states[self.turn].expeditions.iter() {
+            let ((o1, a1), (o2, a2)) = self
+                .planet_map
+                .get(&(ship.origin.clone(), ship.destination.clone()))
+                .unwrap()
+                .get_for_remaining(ship.turns_remaining as usize);
+            new_sl.push((o1 * Mat3::rotate_z(a1)).to_array());
+            new_sl.push((o2 * Mat3::rotate_z(a2)).to_array());
+
+            new_sll.push((o1 + t).to_array());
+            new_sll.push((o2 + t).to_array());
+        }
+
+        self.ship_locations = new_sl.concat();
+        self.ship_label_locations = new_sll.concat();
+
+        self.ship_colours = self.states[self.turn]
+            .expeditions
+            .iter()
+            .map(|s| utils::COLORS[s.owner as usize % utils::COLORS.len()])
+            .collect::<Vec<[f32; 3]>>()
+            .concat();
+    }
+
+    fn update_ship_counts(&mut self) {
+        self.ship_counts = self.states[self.turn]
+            .expeditions
+            .iter()
+            .map(|s| s.ship_count as usize)
+            .collect();
+    }
+
+    pub fn get_max_ships(&self) -> usize {
+        self.states
+            .iter()
+            .map(|s| s.expeditions.len())
+            .max()
+            .unwrap()
+    }
+
+    pub fn get_ship_locations(&self) -> Vec<f32> {
+        self.ship_locations.clone()
+    }
+
+    pub fn get_ship_label_locations(&self) -> Vec<f32> {
+        self.ship_label_locations.clone()
+    }
+
+    pub fn get_ship_colours(&self) -> Vec<f32> {
+        self.ship_colours.clone()
+    }
+
+    pub fn get_ship_counts(&self) -> Vec<usize> {
+        self.ship_counts.clone()
+    }
+
+    pub fn get_voronoi_verts(&self) -> Vec<f32> {
+        self.voronoi_vertices.clone()
+    }
+
+    pub fn get_voronoi_colours(&self) -> Vec<f32> {
+        self.voronoi_colors.clone()
+    }
+
+    pub fn get_voronoi_inds(&self) -> Vec<usize> {
+        self.voronoi_indices.clone()
+    }
+}
+
+#[wasm_bindgen]
+extern "C" {
+    fn alert(s: &str);
+    #[wasm_bindgen(js_namespace = console)]
+    fn log(s: &str);
+}