place food, add drawable trait

src/ant.rs

@@ -1,39 +1,41 @@
+use crate::constants::{ANT_SPEED, FLOOR_COLOR};
+use crate::Drawable;
 use macroquad::prelude::*;
-use std::f32::consts::PI;
-use crate::constants::{FLOOR_COLOR, ANT_SPEED};
 use macroquad::rand::RandomRange;
+use std::f32::consts::PI;
 
 pub(crate) struct Ant {
-  pos: Vec2,
-  dir: f32,
+    pos: Vec2,
+    dir: f32,
 }
 
 impl Ant {
-  pub(crate)fn walk(&mut self, map_data: &Image) {
-    let new_dir = PI / 8. * RandomRange::gen_range(-2, 2) as f32;
-    self.dir = self.dir + new_dir;
-    self.dir = self.dir.clamp(0., PI * 2.);
-
-
-    let acceleration = Vec2::new(self.dir.sin(), -self.dir.cos());
-    let new_pos = self.pos + acceleration * ANT_SPEED * get_frame_time();
-    let dest_pixel = map_data.get_pixel(new_pos.x as u32, new_pos.y as u32);
-    if dest_pixel == FLOOR_COLOR {
-      self.pos = new_pos;
+    pub(crate) fn init(num: i32) -> Vec<Self> {
+        let dir_steps = PI * 2. / num as f32;
+        (0..num)
+            .into_iter()
+            .map(|n| Ant {
+                pos: Vec2::new(400., 200.),
+                dir: n as f32 * dir_steps,
+            })
+            .collect()
+    }
+    pub(crate) fn walk(&mut self, map_data: &Image) {
+        let new_dir = PI / 8. * RandomRange::gen_range(-2, 2) as f32;
+        self.dir += new_dir;
+        self.dir = self.dir.clamp(0., PI * 2.);
+
+        let acceleration = Vec2::new(self.dir.sin(), -self.dir.cos());
+        let new_pos = self.pos + acceleration * ANT_SPEED * get_frame_time();
+        let dest_pixel = map_data.get_pixel(new_pos.x as u32, new_pos.y as u32);
+        if dest_pixel == FLOOR_COLOR {
+            self.pos = new_pos;
+        }
     }
-  }
-  pub(crate)fn draw(&self) {
-    draw_circle(self.pos.x, self.pos.y, 1., BLACK);
-  }
 }
 
-pub(crate) fn init_ants(num_ants: i32) -> Vec<Ant> {
-  let dir_steps = PI * 2. / num_ants as f32;
-  (0..num_ants)
-    .into_iter()
-    .map(|n| Ant {
-      pos: Vec2::new(400., 200.),
-      dir: n as f32 * dir_steps,
-    })
-    .collect()
+impl Drawable for Ant {
+    fn draw(&self) {
+        draw_circle(self.pos.x, self.pos.y, 1., BLACK);
+    }
 }

src/constants.rs

@@ -2,3 +2,5 @@ use macroquad::color::Color;
 
 pub static ANT_SPEED: f32 = 20.;
 pub static FLOOR_COLOR: Color = Color::new(0.46666667, 0.38431373, 0.3019608, 1.);
+pub static SCREEN_WIDTH: i32 = 1280;
+pub static SCREEN_HEIGHT: i32 = 720;

src/food.rs

@@ -0,0 +1,33 @@
+use crate::Drawable;
+use macroquad::color::GREEN;
+use macroquad::math::Vec2;
+use macroquad::prelude::*;
+
+pub(crate) struct Food {
+    pos: Vec2,
+}
+
+impl Food {
+    pub(crate) fn new(pos: Vec2) -> Self {
+        Food { pos }
+    }
+    #[rustfmt::skip]
+    pub(crate) fn init() -> Vec<Self> {
+        vec![
+            Food::new(Vec2::new(335., 75.)),
+            Food::new(Vec2::new(340., 75.)),
+            Food::new(Vec2::new(335., 80.)),
+            Food::new(Vec2::new(340., 80.)),
+            Food::new(Vec2::new(615., 195.)),
+            Food::new(Vec2::new(620., 195.)),
+            Food::new(Vec2::new(615., 200.)),
+            Food::new(Vec2::new(620., 200.)),
+        ]
+    }
+}
+
+impl Drawable for Food {
+    fn draw(&self) {
+        draw_circle(self.pos.x, self.pos.y, 1., GREEN);
+    }
+}

src/main.rs

@@ -1,23 +1,32 @@
 mod ant;
 mod constants;
+mod food;
 
-use macroquad::prelude::*;use crate::ant::init_ants;
+use crate::ant::Ant;
+use crate::constants::{SCREEN_HEIGHT, SCREEN_WIDTH};
+use crate::food::Food;
+use macroquad::prelude::*;
 
 fn window_conf() -> Conf {
     Conf {
         window_title: "Ants".to_string(),
         fullscreen: false,
-        window_width: 1280,
-        window_height: 720,
+        window_width: SCREEN_WIDTH,
+        window_height: SCREEN_HEIGHT,
         ..Default::default()
     }
 }
 
+trait Drawable {
+    fn draw(&self);
+}
+
 #[macroquad::main(window_conf)]
 async fn main() {
     let map = load_texture("map_scaled.png").await.unwrap();
     let map_data = map.get_texture_data();
-    let mut ants = init_ants(16);
+    let mut ants = Ant::init(16);
+    let mut food = Food::init();
 
     loop {
         // actions
@@ -25,11 +34,16 @@ async fn main() {
         if is_key_down(KeyCode::Escape) || is_quit_requested() {
             return;
         }
+        if is_mouse_button_down(MouseButton::Left) {
+            let mouse = mouse_position();
+            food.push(Food::new(Vec2::new(mouse.0, mouse.1)));
+        }
 
         // render
         clear_background(BEIGE);
         draw_texture(map, 0., 0., WHITE);
         ants.iter().for_each(|ant| ant.draw());
+        food.iter().for_each(|food| food.draw());
 
         next_frame().await
     }