From cefff9652b9ec037ea59be5034c08ff985431ad4 Mon Sep 17 00:00:00 2001
From: Edgar Luque <git@edgarluque.com>
Date: Thu, 29 Jun 2023 10:56:38 +0200
Subject: [PATCH] camera moves

---
 src/main.rs   |  3 +++
 src/player.rs | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 48508c6..aa97461 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::type_complexity)]
+
 use bevy::prelude::*;
 use bevy_ecs_tilemap::prelude::*;
 use bevy_inspector_egui::quick::WorldInspectorPlugin;
@@ -27,6 +29,7 @@ fn main() {
         .add_systems((player::player_input, player::player_mouse).before(physics::move_system))
         .add_system(physics::move_system)
         .add_system(misc::aim_target_system.after(physics::move_system))
+        .add_system(player::player_camera.after(misc::aim_target_system))
         .run();
 }
 
diff --git a/src/player.rs b/src/player.rs
index bb37dd9..6c75762 100644
--- a/src/player.rs
+++ b/src/player.rs
@@ -71,3 +71,28 @@ pub fn player_mouse(
         }
     }
 }
+
+pub fn player_camera(
+    mut query_player: Query<(&mut AimTarget, &Transform), (With<Player>, Without<MainCamera>)>,
+    mut query_camera: Query<&mut Transform, With<MainCamera>>,
+) {
+    let mut camera_transform = query_camera.single_mut();
+    let (mut aim_target, player_transform) = query_player.single_mut();
+
+    let old = camera_transform.translation;
+
+    camera_transform.translation = Vec3::new(
+        player_transform.translation.x,
+        player_transform.translation.y,
+        camera_transform.translation.z,
+    );
+
+    // Keep the aim same when camera is moving
+    let diff = camera_transform.translation - old;
+
+    if diff.length() > 0.0 {
+        if let Some(t) = aim_target.0.as_mut() {
+            *t += diff.xy();
+        }
+    }
+}