add basic functions

frontend/Cargo.toml

@@ -28,6 +28,7 @@ wee_alloc = { version = "0.4.2", optional = true }
 serde = "1.0.100"
 serde_derive = "1.0.100"
 serde_json = "1.0"
+octoon-math = "0.1.7"
 
 [dev-dependencies]
 wasm-bindgen-test = "0.2"

frontend/src/lib.rs

@@ -2,6 +2,9 @@ extern crate serde;
 #[macro_use]
 extern crate serde_derive;
 extern crate serde_json;
+extern crate octoon_math;
+
+use octoon_math::{Mat3, Vec3};
 
 mod utils;
 mod types;
@@ -14,19 +17,17 @@ use wasm_bindgen::prelude::*;
 #[global_allocator]
 static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 
-#[wasm_bindgen]
-pub struct Location {
-    x: f64,
-    y: f64,
-    angle: f64,
-}
-
 #[wasm_bindgen]
 pub struct Game {
-    states : Vec<types::State>,
+    states: Vec<types::State>,
+    turn: usize,
 
     /* put extra shit here */
-    current_turn: Vec<Location>,
+    planets: Vec<Vec3<f64>>,
+    view_box: Vec<f64>,
+
+    ship_locations: Vec<Mat3<f64>>,
+    current_planet_colours: Vec<Vec3<f64>>,
 }
 
 #[wasm_bindgen]
@@ -35,32 +36,70 @@ impl Game {
         utils::set_panic_hook();
 
         // First line is fucked but we just filter out things that cannot parse
-        let states = file.split("\n").filter_map(|line|
+        let states: Vec<types::State> = file.split("\n").filter_map(|line|
             serde_json::from_str(line).ok()
         ).collect();
 
         Self {
+            planets: utils::get_planets(&states[0].planets, 10.0),
+            view_box: utils::caclulate_viewbox(&states[0].planets),
+            turn: 0,
             states,
-            current_turn: Vec::new()
+            ship_locations: Vec::new(),
+            current_planet_colours: Vec::new(),
         }
     }
 
+    pub fn get_viewbox(&self) -> *const f64 {
+        self.view_box.as_ptr()
+    }
+
+    pub fn get_planets(&self) -> *const Vec3<f64> {
+        self.planets.as_ptr()
+    }
+
+    pub fn get_planet_colors(&self) -> *const Vec3<f64> {
+        self.current_planet_colours.as_ptr()
+    }
+
+    pub fn get_planet_count(&self) -> usize {
+        self.planets.len()
+    }
+
     pub fn turn_count(&self) -> usize {
         self.states.len()
     }
 
-    pub fn add_location(&mut self, x: f64, y: f64, angle: f64) {
-        self.current_turn.push(
-            Location { x, y, angle}
-        );
+    pub fn update_turn(&mut self, turn: usize) {
+        self.turn = turn.min(self.states.len());
+
+        self.update_planet_colours();
+        self.update_ship_locations()
     }
 
+    fn update_planet_colours(&mut self) {
+        self.current_planet_colours = self.states[self.turn].planets
+            .iter()
+            .map(|p| utils::COLORS[p.owner.unwrap_or(0) as usize % utils::COLORS.len()].into())
+            .collect();
+    }
+
+    fn update_ship_locations(&mut self) {
+
+    }
+
+    // pub fn add_location(&mut self, x: f64, y: f64, angle: f64) {
+    //     self.current_turn.push(
+    //         Location { x, y, angle}
+    //     );
+    // }
+
     pub fn location_count(&self) -> usize {
-        self.current_turn.len()
+        self.ship_locations.len()
     }
 
-    pub fn locations(&self) -> *const Location {
-        self.current_turn.as_ptr()
+    pub fn get_ship_locations(&self) -> *const Mat3<f64> {
+        self.ship_locations.as_ptr()
     }
 }
 

frontend/src/utils.rs

@@ -8,3 +8,44 @@ pub fn set_panic_hook() {
     #[cfg(feature = "console_error_panic_hook")]
     console_error_panic_hook::set_once();
 }
+
+use octoon_math::{Vec3};
+
+/// this is total extra, so it the planet viewbox is like 100px wide, it will now be in total 110 pixels wide
+static VIEWBOX_SCALE: f64 = 0.1;
+
+pub static COLORS: [[f64; 3]; 10] = [
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+    [1.0, 0.0, 0.0],
+];
+
+use super::types;
+
+pub fn caclulate_viewbox(planets: &Vec<types::Planet>) -> Vec<f64> {
+    let mut iter = planets.iter();
+
+    let init = match iter.next() {
+        Some(p) => (p.x, p.y, p.x, p.y),
+        None => return vec![0.0, 0.0, 0.0, 0.0],
+    };
+    let (min_x, min_y, max_x, max_y) = planets
+        .iter()
+        .fold(init, |(min_x, min_y, max_x, max_y), p| (min_x.min(p.x), min_y.min(p.y), max_x.max(p.x), max_y.max(p.y)));
+
+    let (width, height) = (max_x - min_x, max_y - min_y);
+    let (dx, dy) = (VIEWBOX_SCALE * width, VIEWBOX_SCALE * height);
+
+    vec![min_x - dx/2.0, min_y - dy/2.0, width + dx, height + dy]
+}
+
+pub fn get_planets(planets: &Vec<types::Planet>, r: f64) -> Vec<Vec3<f64>> {
+    planets.iter().map(|p| Vec3::new(p.x, p.y, r)).collect()
+}