From 03bb1614c25a56ef6225db09c4c59b7a5f8fa808 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Mon, 13 Feb 2023 01:06:31 +0100
Subject: Externalized part of simulation systems

---
 sim/CMakeLists.txt                |  1 +
 sim/include/kurator/sim/systems.h | 17 ++++++++++++++
 sim/src/BaseBattle.cpp            | 39 +------------------------------
 sim/src/systems.cpp               | 49 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 68 insertions(+), 38 deletions(-)
 create mode 100644 sim/include/kurator/sim/systems.h
 create mode 100644 sim/src/systems.cpp

diff --git a/sim/CMakeLists.txt b/sim/CMakeLists.txt
index 9d24182..27f312b 100644
--- a/sim/CMakeLists.txt
+++ b/sim/CMakeLists.txt
@@ -7,6 +7,7 @@ add_library(
 	src/FloatingMovement.cpp
 	src/HitPoints.cpp
 	src/RandomSpawner.cpp
+	src/systems.cpp
 	src/TeamManager.cpp
 	src/TurretControl.cpp
 )
diff --git a/sim/include/kurator/sim/systems.h b/sim/include/kurator/sim/systems.h
new file mode 100644
index 0000000..76353c2
--- /dev/null
+++ b/sim/include/kurator/sim/systems.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <kurator/engine/Context.h>
+
+
+namespace kurator
+{
+namespace sim
+{
+
+
+void keep_at_range(engine::Context& ctx);
+void kill_off_dead(engine::Context& ctx);
+
+
+}  // namespace sim
+}  // namespace kurator
diff --git a/sim/src/BaseBattle.cpp b/sim/src/BaseBattle.cpp
index 0c23065..888379e 100644
--- a/sim/src/BaseBattle.cpp
+++ b/sim/src/BaseBattle.cpp
@@ -8,11 +8,9 @@
 #include <kurator/engine/Context.h>
 #include <kurator/campaign/Scenario.h>
 #include <kurator/sim/components.h>
-#include <kurator/sim/events.h>
 #include <kurator/sim/FloatingMovement.h>
-#include <kurator/sim/HitPoints.h>
+#include <kurator/sim/systems.h>
 #include <kurator/sim/TurretControl.h>
-#include <kurator/stats/events.h>
 #include <kurator/universe/UniqueIdentifier.h>
 
 #include "Builder.h"
@@ -67,10 +65,6 @@ BaseBattle::dispatcher()
 }
 
 
-static void keep_at_range(engine::Context& ctx);
-static void kill_off_dead(engine::Context& ctx);
-
-
 void
 BaseBattle::update(engine::Context& ctx)
 {
@@ -94,36 +88,5 @@ BaseBattle::pick_random_targets()
 }
 
 
-void
-keep_at_range(engine::Context& ctx)
-{
-	auto view = ctx.registry.view<Transform, AIState>();
-	for (auto&& [entity, self, ai] : view.each()) {
-		if (!ctx.registry.valid(ai.target))
-			continue;
-		const auto target = ctx.registry.get<Transform>(ai.target);
-		const auto offset = target.position - self.position;
-		ai.destination = target.position - offset.normalized().scale(ai.keep_at_range);
-	}
-}
-
-
-void
-kill_off_dead(engine::Context& ctx)
-{
-	auto view = ctx.registry.view<HitPoints>();
-	for (auto&& [entity, points] : view.each()) {
-		if (points.is_alive())
-			continue;
-		if (ctx.registry.all_of<universe::UniqueIdentifier, Team>(entity)) {
-			const auto& [identifier, team] = ctx.registry.get<universe::UniqueIdentifier, Team>(entity);
-			ctx.dispatcher.trigger(stats::ShipLeft{ctx.clock.game, identifier, team.id, true});
-			ctx.dispatcher.trigger(Destroyed{entity});
-		}
-		ctx.registry.destroy(entity);
-	}
-}
-
-
 }  // namespace sim
 }  // namespace kurator
diff --git a/sim/src/systems.cpp b/sim/src/systems.cpp
new file mode 100644
index 0000000..114ed2f
--- /dev/null
+++ b/sim/src/systems.cpp
@@ -0,0 +1,49 @@
+#include <kurator/sim/systems.h>
+
+#include <kurator/engine/Context.h>
+#include <kurator/sim/components.h>
+#include <kurator/sim/events.h>
+#include <kurator/sim/HitPoints.h>
+#include <kurator/stats/events.h>
+#include <kurator/universe/UniqueIdentifier.h>
+
+
+namespace kurator
+{
+namespace sim
+{
+
+
+void
+keep_at_range(engine::Context& ctx)
+{
+	auto view = ctx.registry.view<Transform, AIState>();
+	for (auto&& [entity, self, ai] : view.each()) {
+		if (!ctx.registry.valid(ai.target))
+			continue;
+		const auto target = ctx.registry.get<Transform>(ai.target);
+		const auto offset = target.position - self.position;
+		ai.destination = target.position - offset.normalized().scale(ai.keep_at_range);
+	}
+}
+
+
+void
+kill_off_dead(engine::Context& ctx)
+{
+	auto view = ctx.registry.view<HitPoints>();
+	for (auto&& [entity, points] : view.each()) {
+		if (points.is_alive())
+			continue;
+		if (ctx.registry.all_of<universe::UniqueIdentifier, Team>(entity)) {
+			const auto& [identifier, team] = ctx.registry.get<universe::UniqueIdentifier, Team>(entity);
+			ctx.dispatcher.trigger(stats::ShipLeft{ctx.clock.game, identifier, team.id, true});
+			ctx.dispatcher.trigger(Destroyed{entity});
+		}
+		ctx.registry.destroy(entity);
+	}
+}
+
+
+}  // namespace sim
+}  // namespace kurator
-- 
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