a bit more collision detection logic

game_core/src/field/field.rs

@@ -0,0 +1,30 @@
+#[derive(Clone, Copy, PartialEq)]
+pub enum Tile {
+    Empty,
+    Wall,
+    Food,
+}
+
+pub struct Field {
+    pub width: usize,
+    pub height: usize,
+    pub tiles: Vec<Tile>,
+}
+
+impl Field {
+    pub fn new(width: usize, height: usize) -> Self {
+        Self {
+            width,
+            height,
+            tiles: vec![Tile::Empty; width * height],
+        }
+    }
+
+    pub fn get_tile(&self, x: usize, y: usize) -> Tile {
+        self.tiles[y * self.width + x]
+    }
+
+    pub fn set_tile(&mut self, x: usize, y: usize, tile: Tile) {
+        self.tiles[y * self.width + x] = tile;
+    }
+}

game_core/src/field/mod.rs

@@ -0,0 +1 @@
+pub mod field;