Cargo.toml

@@ -6,4 +6,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+skunk2d = {path = "../skunk2d"}
 rand = "0.8.5"

assets/units/tank.pal

@@ -0,0 +1 @@
+ŚŠŚüţü¤˘¤”–”DBD¬®¬”’”|~|\Z\śžś´˛´ŚŽŚ¤¦¤

rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly"

src/interpolator.rs

@@ -0,0 +1,42 @@
+use std::time::{Duration, Instant};
+use skunk2d::Vec2;
+
+pub struct Interpolator {
+    start: Instant,
+    end: Instant,
+    length: Duration
+}
+
+impl Interpolator {
+    pub fn new(start: Instant, length: Duration) -> Self {
+        Interpolator {
+            start,
+            end: start + length,
+            length
+        }
+    }
+
+    //interpolator that will always return 1.0f64
+    pub fn fake() -> Self {
+        //ugly <_<
+        let meh = Instant::now() - Duration::from_secs(100);
+        Interpolator::new(meh, Duration::from_secs(1))
+    }
+
+    pub fn get(&self, pos: Instant) -> f64 {
+        (pos - self.start).div_duration_f64(self.length).max(0f64).min(1f64)
+    }
+
+    pub fn apply_vec2(&self, pos: Instant, v1: Vec2<i32>, v2: Vec2<i32>) -> Vec2<i32> {
+        let p = self.get(pos);
+        let delta = v2 - v1;
+        if delta.x.abs() > 100 || delta.y.abs() > 100 {
+            v2
+        } else {
+            Vec2 {
+                x: (v1.x as f64 + delta.x as f64 * p).round() as i32,
+                y: (v1.y as f64 + delta.y as f64 * p).round() as i32
+            }
+        }
+    }
+}

src/main.rs

@@ -1,3 +1,89 @@
-fn main() {
-    println!("Hello World nyaa");
+#![feature(div_duration)]
+
+mod unit_kind;
+mod unit;
+mod interpolator;
+
+use std::cell::RefCell;
+use std::rc::Rc;
+use std::time::{Duration, Instant};
+use rand::Rng;
+use skunk2d::{Direction, Event, HexMap, Image, run, Tileset, Vec2, WindowState};
+use crate::unit::Unit;
+use crate::unit_kind::UnitKind;
+
+//todo: keep unit_map position and unit's position in sync... how?
+
+struct Game {
+    map: HexMap,
+    unit_map: Vec<Option<Rc<RefCell<Unit>>>>,
+    unit: Rc<RefCell<Unit>>,
+    last_tick: Instant,
+    tick_duration: Duration,
+    current_tick: i32,
+}
+
+fn setup_palette(ws: &mut WindowState) {
+    ws.set_palette(0, 0xc0, 0xf0, 0xd0);
+    ws.set_palette(2, 0x10, 0x30, 0x20);
+    ws.set_palette(1, 0xb0, 0xe0, 0xc0);
+    ws.set_palette(3, 0xa0, 0xd0, 0xb0);
+
+    ws.set_palette(255, 0xff, 0xff, 0xff);
+    ws.set_palette(254, 0x00, 0x00, 0x00);
+    ws.set_palette(253, 0x80, 0x80, 0x80);
+
+}
+
+impl Game {
+    pub fn tick(&mut self, window_state: &mut WindowState) {
+        window_state.log(format!("tick: {}", self.current_tick).as_str());
+
+        let mut unit = self.unit.borrow_mut();
+        unit.cool();
+        unit.move_unit(rand::thread_rng().gen(), &self.map);
+        //unit.set_pos(Vec2{x: 5, y: self.current_tick % self.map.size().y});
+    }
+}
+
+impl skunk2d::Game for Game {
+    fn new(window_state: &mut WindowState) -> Self {
+        setup_palette(window_state);
+        window_state.scramble_palette();
+        let tick_duration = Duration::from_secs(1) / 10;
+        let tileset = Tileset::load("assets/hex3.gif", Vec2{x: 1, y: 1});
+        let kind = UnitKind::new("tank", 4, tick_duration);
+        let map = HexMap::new(Vec2{x: 26, y: 22}, tileset, Vec2{ x: 72, y: 24 });
+        let idx_size = map.idx_size();
+        Game {
+            map,
+            unit_map: vec![None; idx_size],
+            unit: kind.spawn(Vec2{x: 5, y: 5}),
+            last_tick: Instant::now(),
+            tick_duration,
+            current_tick: 0
+        }
+    }
+
+    fn update(&mut self, window_state: &mut WindowState) {
+        if Instant::now() - self.last_tick >= self.tick_duration {
+            self.tick(window_state);
+            self.last_tick += self.tick_duration;
+            self.current_tick += 1;
+        }
+    }
+
+    fn on_event(&mut self, window_state: &mut WindowState, event: Event) {
+    }
+
+    fn draw(&self, target: &mut Image) {
+        let now = Instant::now();
+        target.clear();
+        target.draw_hexmap(Vec2::zero(), &self.map);
+        self.unit.borrow().draw(target, &self.map, now);
+    }
+}
+
+fn main() {
+    run::<Game>(1920, 1080, 60);
 }

src/unit.rs

@@ -0,0 +1,47 @@
+use std::rc::Rc;
+use std::time::Instant;
+use skunk2d::{HexMap, Image, Vec2, Direction};
+use crate::interpolator::Interpolator;
+use crate::unit_kind::UnitKind;
+
+pub struct Unit {
+    pub kind: Rc<UnitKind>,
+    pub pos: Vec2<i32>,
+    pub interpolator: Interpolator,
+    pub old_pos: Vec2<i32>,
+    pub cooldown: i32
+}
+
+impl Unit {
+    pub fn cool(&mut self) {
+        self.cooldown = (self.cooldown - 1).max(0)
+    }
+
+    pub fn draw(&self, target: &mut Image, map: &HexMap, time: Instant) {
+        let old_pos = map.coord_to_pixel(self.old_pos);
+        let new_pos = map.coord_to_pixel(self.pos);
+        let pos = self.interpolator.apply_vec2(time, old_pos, new_pos);
+        //todo: don't hardcode offset :P
+        target.draw_image( pos + Vec2{x: 0, y: -24}, &self.kind.sprite);
+    }
+
+    pub fn move_unit(&mut self, dir: Direction, map: &HexMap) {
+        if self.cooldown == 0 {
+            let new_pos = HexMap::get_neighbour(self.pos, dir);
+            if map.is_valid_coord(new_pos) {
+                self.set_pos(new_pos);
+                self.cooldown = self.kind.speed;
+            }
+        }
+    }
+
+    pub fn set_pos(&mut self, pos: Vec2<i32>) {
+        self.interpolator = Interpolator::new(Instant::now(), self.kind.movement_duration);
+        self.old_pos = self.pos;
+        self.pos = pos;
+    }
+
+    pub fn add_pos(&mut self, pos: Vec2<i32>) {
+        self.set_pos(self.pos + pos);
+    }
+}

src/unit_kind.rs

@@ -0,0 +1,36 @@
+use std::cell::RefCell;
+use std::ops::Mul;
+use std::rc::Rc;
+use std::time::Duration;
+use skunk2d::{Image, Vec2};
+use crate::interpolator::Interpolator;
+use crate::unit::Unit;
+
+pub struct UnitKind {
+    pub sprite: Rc<Image>,
+    pub name: String,
+    pub speed: i32,
+    pub movement_duration: Duration
+}
+
+impl UnitKind {
+    pub fn new(name: &str, speed: i32, tick_duration: Duration) -> Rc<Self> {
+        UnitKind {
+            sprite: Image::load(format!("assets/units/{}.gif", name).as_str()),
+            name: name.into(),
+            speed,
+            movement_duration: tick_duration.mul(speed as u32)
+        }.into()
+    }
+
+    pub fn spawn(self: Rc<Self>, pos: Vec2<i32>) -> Rc<RefCell<Unit>> {
+        RefCell::new(Unit {
+            kind: self,
+            pos,
+            interpolator: Interpolator::fake(),
+            old_pos: pos,
+            cooldown: 0
+        }).into()
+    }
+}
+