From e17ecf3a851219791e150493e812275cd8e7a486 Mon Sep 17 00:00:00 2001
From: "Simon A. Berger" <simberger@gmail.com>
Date: Sat, 9 Dec 2023 13:09:37 +0100
Subject: [PATCH] disable game logic in pause state

---
 src/droid/ai.rs  | 10 +++++++---
 src/droid/mod.rs | 12 +++++++++---
 src/ship.rs      |  8 ++++++--
 src/state.rs     | 14 ++++++++++++++
 4 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/src/droid/ai.rs b/src/droid/ai.rs
index 909e8a4..1e3825c 100644
--- a/src/droid/ai.rs
+++ b/src/droid/ai.rs
@@ -1,4 +1,5 @@
 use crate::player::PlayerMarker;
+use crate::prelude::*;
 use crate::weapon::PROJECTILE_SPEED;
 use crate::{droid::WeaponState, weapon::Projectile};
 use bevy::{
@@ -346,7 +347,8 @@ impl Plugin for AiPlugin {
             (
                 assault_predict_system,
                 incomping_projectile_evaluation_system,
-            ),
+            )
+                .run_if(in_state(GameState::Game)),
         );
         // app
         //     // .add_system(movement_update_system)
@@ -373,7 +375,8 @@ impl Plugin for AiPlugin {
                 actions::evade_enemy_action_system.in_set(BigBrainSet::Actions),
                 actions::evade_projectile_action_system.in_set(BigBrainSet::Actions),
                 actions::roam_action_system.in_set(BigBrainSet::Actions),
-            ),
+            )
+                .run_if(in_state(GameState::Game)),
         );
         app.add_systems(
             PreUpdate,
@@ -382,7 +385,8 @@ impl Plugin for AiPlugin {
                 scorers::projectile_incoming_score_system.in_set(BigBrainSet::Scorers),
                 scorers::enemy_close_system.in_set(BigBrainSet::Scorers),
                 scorers::idle_boredom_score_system.in_set(BigBrainSet::Scorers),
-            ),
+            )
+                .run_if(in_state(GameState::Game)),
         );
     }
 }
diff --git a/src/droid/mod.rs b/src/droid/mod.rs
index eb82300..94d0ef1 100644
--- a/src/droid/mod.rs
+++ b/src/droid/mod.rs
@@ -263,8 +263,14 @@ impl Plugin for DroidPlugin {
     fn build(&self, app: &mut App) {
         app
             // .add_system(droid_stop_system)
-            .add_systems(Update, droid_apply_direction_system) //.after(droid_stop_system))
-            .add_systems(Update, droid_attack_system)
-            .add_systems(Update, droid_overload_system);
+            .add_systems(
+                Update,
+                (
+                    droid_apply_direction_system, //.after(droid_stop_system))
+                    droid_attack_system,
+                    droid_overload_system,
+                )
+                    .run_if(in_state(GameState::Game)),
+            );
     }
 }
diff --git a/src/ship.rs b/src/ship.rs
index ef00686..b419243 100644
--- a/src/ship.rs
+++ b/src/ship.rs
@@ -409,8 +409,12 @@ impl Plugin for ShipPlugin {
                 ship_thruster_system.after(ship_brake_maneuver_system),
                 ship_attack_system,
                 ship_thruster_particle_system.after(ship_thruster_system),
-            ),
+            )
+                .run_if(in_state(GameState::Game)),
         )
-        .add_systems(PostUpdate, ship_attach_thruster_particle_spawner_system);
+        .add_systems(
+            PostUpdate,
+            ship_attach_thruster_particle_spawner_system.run_if(in_state(GameState::Game)),
+        );
     }
 }
diff --git a/src/state.rs b/src/state.rs
index 5f28792..5fd8c4a 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -1,4 +1,5 @@
 use bevy::prelude::*;
+use bevy_rapier2d::plugin::RapierConfiguration;
 
 // if true, GameState::None will automatically switch through to GameState::Game
 // can be used for restarting game.
@@ -79,6 +80,16 @@ fn auto_start_system(
         next_state.set(GameState::Game);
     }
 }
+fn startup_system(mut rapier_config: ResMut<RapierConfiguration>) {
+    rapier_config.physics_pipeline_active = false;
+}
+fn enter_game_state(mut rapier_config: ResMut<RapierConfiguration>) {
+    rapier_config.physics_pipeline_active = true;
+}
+
+fn exit_game_state(mut rapier_config: ResMut<RapierConfiguration>) {
+    rapier_config.physics_pipeline_active = false;
+}
 
 pub struct StatePlugin;
 
@@ -86,7 +97,10 @@ impl Plugin for StatePlugin {
     fn build(&self, app: &mut App) {
         app.add_state::<GameState>()
             .insert_resource(AutoStart(false))
+            .add_systems(Startup, startup_system)
             .add_systems(PreUpdate, auto_start_system)
+            .add_systems(OnEnter(GameState::Game), enter_game_state)
+            .add_systems(OnExit(GameState::Game), exit_game_state)
             .add_systems(
                 Last,
                 game_despawn_reaper_system.run_if(in_state(GameState::Game)),