started implementing hexmap

examples/test.rs

@@ -5,7 +5,7 @@ const HEIGHT: i32 = 720;
 
 struct World {
     img: Image,
-    pos: Vec2<i32>
+    pos: Vec2<i32>,
 }
 
 fn main() {
@@ -18,7 +18,7 @@ impl Game for World {
         window_state.scramble_palette();
         Self {
             img: Image::load("examples/assets/test.gif"),
-            pos: Vec2::zero()
+            pos: Vec2::zero(),
         }
     }
 
@@ -40,6 +40,13 @@ impl Game for World {
         target.draw_image(Vec2 { x: 200, y: 100 }, &self.img);
         target.draw_image(self.pos, &self.img);
 
-        target.draw_line(Vec2{x: WIDTH/2, y: HEIGHT/2}, self.pos, 10);
+        target.draw_line(
+            Vec2 {
+                x: WIDTH / 2,
+                y: HEIGHT / 2,
+            },
+            self.pos,
+            10,
+        );
     }
 }

src/hexmap.rs

@@ -0,0 +1,43 @@
+use crate::Vec2;
+
+//odd-q vertical layout https://www.redblobgames.com/grids/hexagons
+pub struct HexMap<T: Default> {
+    size: Vec2<i32>,
+    data: Vec<T>,
+    tile_size: Vec2<i32>,
+}
+
+impl<T: Default + Clone> HexMap<T> {
+    //pub static
+    pub fn new(size: Vec2<i32>, tile_size: Vec2<i32>) -> Self {
+        HexMap {
+            size,
+            data: vec![T::default(); size.size()],
+            tile_size,
+        }
+    }
+
+    //pub
+    pub fn get(&self, coord: Vec2<i32>) -> &T {
+        &self.data[self.coord_to_idx(coord)]
+    }
+
+    pub fn get_mut(&mut self, coord: Vec2<i32>) -> &mut T {
+        let idx = self.coord_to_idx(coord);
+        &mut self.data[idx]
+    }
+
+    pub fn set(&mut self, coord: Vec2<i32>, val: T) {
+        let idx = self.coord_to_idx(coord);
+        self.data[idx] = val;
+    }
+
+    pub fn size(&self) -> Vec2<i32> {
+        self.size
+    }
+
+    //priv
+    fn coord_to_idx(&self, coord: Vec2<i32>) -> usize {
+        (coord.x + coord.y * self.size.x) as usize
+    }
+}

src/lib.rs

@@ -1,9 +1,11 @@
-mod window;
+mod hexmap;
 mod image;
-mod vec2;
 mod rect;
+mod vec2;
+mod window;
 
-pub use window::*;
+pub use hexmap::*;
 pub use image::*;
-pub use vec2::*;
 pub use rect::*;
+pub use vec2::*;
+pub use window::*;