From ec95776771d061c21af17686491181c78b7955c9 Mon Sep 17 00:00:00 2001
From: Tom Barrett <tom@tombarrett.xyz>
Date: Sat, 20 Mar 2021 12:35:38 +0100
Subject: draw grid

---
 assets/cosmonaut.png | Bin 1066 -> 0 bytes
 assets/tileset.png   | Bin 2662 -> 18168 bytes
 src/constants.rs     |   2 +-
 src/main.rs          |  89 ++++++++++++++++++++++++++++++++++-----------------
 4 files changed, 61 insertions(+), 30 deletions(-)
 delete mode 100644 assets/cosmonaut.png

diff --git a/assets/cosmonaut.png b/assets/cosmonaut.png
deleted file mode 100644
index a4fd017..0000000
Binary files a/assets/cosmonaut.png and /dev/null differ
diff --git a/assets/tileset.png b/assets/tileset.png
index d519715..1d190d8 100644
Binary files a/assets/tileset.png and b/assets/tileset.png differ
diff --git a/src/constants.rs b/src/constants.rs
index f9a5003..5952fa5 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,5 +1,5 @@
 pub const TILE_SCALE: f32 = 3.0;
-pub const TILE_HEIGHT: f32 = 16.0;
+pub const TILE_SIZE: f32 = 16.0;
 pub const TILE_WIDTH: f32 = 16.0;
 pub const BORDER_SIZE: f32 = 3.0;
 pub const SHIFT_X: f32 = 50.0;
diff --git a/src/main.rs b/src/main.rs
index c4e40f9..acecaad 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -23,55 +23,86 @@ impl Cell {
     }
 }
 
-struct Position {
-    x: f32,
-    y: f32,
-}
-
-pub fn add_cells(commands: &mut Commands) {
-    for i in 0..8 {
-        for j in 0..8 {
-            commands.spawn((
-                Cell::new(i, j),
-                Position {
-                    x: (i as f32 * constants::TILE_HEIGHT),
-                    y: (j as f32 * constants::TILE_WIDTH),
-                },
-            ));
-        }
-    }
-}
-
-pub fn add_background(
+pub fn setup(
     commands: &mut Commands,
     asset_server: Res<AssetServer>,
     mut materials: ResMut<Assets<ColorMaterial>>,
+    mut texture_atlases: ResMut<Assets<TextureAtlas>>,
 ) {
-    let texture_handle = asset_server.load("background.png");
+    let background = asset_server.load("background.png");
+    let tileset = asset_server.load("tileset.png");
+
+    let atlas = TextureAtlas::from_grid(tileset, Vec2::new(16.0, 16.0), 4, 4);
+    let atlas_handle = texture_atlases.add(atlas);
+
     commands
-        .spawn(Camera2dBundle {
+        .spawn(Camera2dBundle::default())
+        .spawn(SpriteBundle {
+            material: materials.add(background.into()),
             transform: Transform {
-                translation: Vec3{
-                    x: -40.0,
+                translation: Vec3 {
+                    x: 50.0,
                     y: 0.0,
                     z: 0.0,
                 },
-                scale: Vec3::splat(0.3),
+                scale: Vec3::splat(3.5),
                 ..Default::default()
             },
             ..Default::default()
         })
-        .spawn(SpriteBundle {
-            material: materials.add(texture_handle.into()),
+        .spawn(SpriteSheetBundle {
+            sprite: TextureAtlasSprite::new(8),
+            texture_atlas: atlas_handle.clone(),
+            transform: Transform {
+                translation: Vec3 {
+                    x: 225.0,
+                    y: -200.0,
+                    z: 0.0,
+                },
+                scale: Vec3::splat(3.5),
+                ..Default::default()
+            },
+            ..Default::default()
+        })
+        .spawn(SpriteSheetBundle {
+            sprite: TextureAtlasSprite::new(12),
+            texture_atlas: atlas_handle.clone(),
+            transform: Transform {
+                translation: Vec3 {
+                    x: 225.0,
+                    y: -200.0 + (-16.0) * 3.5,
+                    z: 0.0,
+                },
+                scale: Vec3::splat(3.5),
+                ..Default::default()
+            },
             ..Default::default()
         });
+
+    for i in 0..8 {
+        for j in 0..8 {
+            commands.spawn(SpriteSheetBundle {
+                sprite: TextureAtlasSprite::new(1),
+                texture_atlas: atlas_handle.clone(),
+                transform: Transform {
+                    translation: Vec3 {
+                        x: ((i as f32) * 16.0 * 3.5) - 320.0,
+                        y: ((j as f32) * 16.0 * 3.5) - 170.0,
+                        z: 0.0,
+                    },
+                    scale: Vec3::splat(3.5),
+                    ..Default::default()
+                },
+                ..Default::default()
+            });
+        }
+    }
 }
 
 pub struct GemsPlugin;
 impl Plugin for GemsPlugin {
     fn build(&self, app: &mut AppBuilder) {
-        app.add_startup_system(add_background.system());
-        app.add_startup_system(add_cells.system());
+        app.add_startup_system(setup.system());
     }
 }
 
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