From 6ebd267bcf026343c354fb107fb03ba800eb9aca Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sun, 15 Jan 2023 17:20:10 +0100
Subject: Implemented naive on-death markers

---
 kurator/src/Battle.cpp           | 42 ++++++++++++++++++++++++++++++++++++++++
 kurator/src/Battle.h             |  3 ++-
 kurator/src/components.h         |  9 +++++++++
 sim/include/kurator/sim/events.h |  6 ++++++
 sim/src/BaseBattle.cpp           |  1 +
 5 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/kurator/src/Battle.cpp b/kurator/src/Battle.cpp
index 3d0ac72..d7232ff 100644
--- a/kurator/src/Battle.cpp
+++ b/kurator/src/Battle.cpp
@@ -44,6 +44,7 @@ Battle::Battle(std::shared_ptr<Session> _session, campaign::Scenario scenario, B
 {
 	battle->dispatcher().sink<sim::End>().connect<&Battle::on_end>(*this);
 	battle->dispatcher().sink<sim::Hit>().connect<&Battle::on_hit>(*this);
+	battle->dispatcher().sink<sim::Destroyed>().connect<&Battle::on_destroyed>(*this);
 	battle->dispatcher().sink<stats::ShipLeft>().connect<&Battle::on_ship_left>(*this);
 	auto& registry = battle->registry();
 	auto ships = registry.view<sim::Team, universe::ShipType, universe::UniqueIdentifier>();
@@ -58,6 +59,7 @@ Battle::~Battle()
 {
 	battle->dispatcher().sink<sim::End>().disconnect(*this);
 	battle->dispatcher().sink<sim::Hit>().disconnect(*this);
+	battle->dispatcher().sink<sim::Destroyed>().disconnect(*this);
 	battle->dispatcher().sink<stats::ShipLeft>().disconnect(*this);
 }
 
@@ -84,6 +86,13 @@ Battle::update(const float dt)
 		pop.speed.x -= damp.x;
 		pop.speed.y -= damp.y;
 	}
+	auto crosses = registry.view<Cross>();
+	for (auto&& [entity, cross] : crosses.each()) {
+		cross.timer += dt;
+		const auto dphase = cross.phase * 2;
+		if (cross.timer > dphase)
+			cross.timer -= dphase;
+	}
 	auto lines = registry.view<Line>();
 	for (auto&& [entity, line] : lines.each())
 		line.position += (1.0 + line.hlength) / line.duration * dt * time_factor;
@@ -115,6 +124,25 @@ Battle::draw() const
 	const int hheight = GetScreenHeight() / 2;
 	const double scale = std::min(hwidth/15000.0, hheight/15000.0);
 	auto& registry = battle->registry();
+	auto crosses = registry.view<sim::Transform, Cross>();
+	for (const auto& [entity, transform, cross] : crosses.each()) {
+		if (cross.timer > cross.phase)
+			continue;
+		const int x = hwidth + transform.position.x*scale;
+		const int y = hheight + transform.position.y*scale;
+		DrawLine(
+			x - cross.hlength,
+			y - cross.hlength,
+			x + cross.hlength,
+			y + cross.hlength,
+			cross.color);
+		DrawLine(
+			x + cross.hlength,
+			y - cross.hlength,
+			x - cross.hlength,
+			y + cross.hlength,
+			cross.color);
+	}
 	auto lines = registry.view<Line>();
 	for (const auto& [entity, line] : lines.each()) {
 		const auto diff = line.end - line.start;
@@ -189,6 +217,20 @@ Battle::on_hit(const sim::Hit& hit)
 
 
 void
+Battle::on_destroyed(const sim::Destroyed& event)
+{
+	auto& registry = battle->registry();
+	if (!registry.valid(event.victim))
+		return;
+	const auto& victim = registry.get<sim::Transform>(event.victim);
+	const auto cross = registry.create();
+	registry.emplace<Timed>(cross, 1.6);
+	registry.emplace<Cross>(cross, 0.2, 6.0);
+	registry.emplace<sim::Transform>(cross, victim.position, 0.0);
+}
+
+
+void
 Battle::on_ship_left(const stats::ShipLeft& event)
 {
 	log.push_back(event);
diff --git a/kurator/src/Battle.h b/kurator/src/Battle.h
index 500318a..7a48e21 100644
--- a/kurator/src/Battle.h
+++ b/kurator/src/Battle.h
@@ -29,7 +29,8 @@ public:
 	void draw() const override;
 	void on_end(const sim::End& end);
 	void on_hit(const sim::Hit& hit);
-	void on_ship_left(const stats::ShipLeft& event);
+	void on_destroyed(const sim::Destroyed& event);
+	void on_ship_left(const stats::ShipLeft& event);  // duplicated?
 private:
 	std::shared_ptr<Session> session;
 	std::unique_ptr<sim::Battle> battle;
diff --git a/kurator/src/components.h b/kurator/src/components.h
index 7d0239f..bcd34e6 100644
--- a/kurator/src/components.h
+++ b/kurator/src/components.h
@@ -58,4 +58,13 @@ struct Line
 };
 
 
+struct Cross
+{
+	double phase;
+	double hlength;
+	Color color = GRAY;
+	double timer = 0.0;
+};
+
+
 }  // namespace kurator
diff --git a/sim/include/kurator/sim/events.h b/sim/include/kurator/sim/events.h
index 71ce098..87cd430 100644
--- a/sim/include/kurator/sim/events.h
+++ b/sim/include/kurator/sim/events.h
@@ -22,5 +22,11 @@ struct End
 };
 
 
+struct Destroyed
+{
+	entt::entity victim;
+};
+
+
 }  // namespace sim
 }  // namespace kurator
diff --git a/sim/src/BaseBattle.cpp b/sim/src/BaseBattle.cpp
index 5173892..99a0199 100644
--- a/sim/src/BaseBattle.cpp
+++ b/sim/src/BaseBattle.cpp
@@ -105,6 +105,7 @@ BaseBattle::kill_off_dead()
 		if (_registry.all_of<universe::UniqueIdentifier, Team>(entity)) {
 			const auto& [identifier, team] = _registry.get<universe::UniqueIdentifier, Team>(entity);
 			_dispatcher.trigger(stats::ShipLeft{time, identifier, team.id, true});
+			_dispatcher.trigger(Destroyed{entity});
 		}
 		_registry.destroy(entity);
 	}
-- 
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