From dd997209468bde60f57089960f46067a375890ca Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sun, 29 Jan 2023 02:06:52 +0100
Subject: Damage popups will now merge when possible

---
 kurator/CMakeLists.txt       |  1 +
 kurator/src/Battle.cpp       | 11 ++++-------
 kurator/src/PopupEmitter.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 kurator/src/PopupEmitter.h   | 20 ++++++++++++++++++++
 4 files changed, 63 insertions(+), 7 deletions(-)
 create mode 100644 kurator/src/PopupEmitter.cpp
 create mode 100644 kurator/src/PopupEmitter.h

diff --git a/kurator/CMakeLists.txt b/kurator/CMakeLists.txt
index e2e4821..5b49bfb 100644
--- a/kurator/CMakeLists.txt
+++ b/kurator/CMakeLists.txt
@@ -8,6 +8,7 @@ add_executable(
 	src/ForceBalance.cpp
 	src/main.cpp
 	src/Pause.cpp
+	src/PopupEmitter.cpp
 	src/ScenarioEditor.cpp
 	src/SceneBuilder.cpp
 	src/SceneFrame.cpp
diff --git a/kurator/src/Battle.cpp b/kurator/src/Battle.cpp
index d7232ff..8073585 100644
--- a/kurator/src/Battle.cpp
+++ b/kurator/src/Battle.cpp
@@ -22,6 +22,7 @@
 #include "colors.h"
 #include "components.h"
 #include "Pause.h"
+#include "PopupEmitter.h"
 #include "Session.h"
 #include "Summary.h"
 
@@ -51,6 +52,7 @@ Battle::Battle(std::shared_ptr<Session> _session, campaign::Scenario scenario, B
 	for (const auto& [entity, team, type, identifier] : ships.each()) {
 		std::string label = TextFormat("%s (%d)", type.name.c_str(), identifier.id);
 		registry.emplace<Marker>(entity, 5.0, team_color(team.id), std::move(label));
+		registry.emplace<PopupEmitter>(entity);
 	}
 }
 
@@ -195,15 +197,10 @@ Battle::on_hit(const sim::Hit& hit)
 	auto& registry = battle->registry();
 	if (!registry.valid(hit.victim))
 		return;
-	const std::string text = TextFormat("%.1f", hit.damage);
 	const auto& source = registry.get<sim::Transform>(hit.source);
 	const auto& victim = registry.get<sim::Transform>(hit.victim);
-	const auto popup = registry.create();
-	registry.emplace<Timed>(popup, 1.2);
-	registry.emplace<CenteredText>(popup, text, MeasureText(text.c_str(), 10), 10, RED);
-	registry.emplace<sim::Transform>(popup, victim.position, 0.0);
-	registry.emplace<UIOffset>(popup, 0, 0);
-	registry.emplace<PopMove>(popup, sim::Point{0.0, -20}, 0.9998);
+	auto& popup = registry.get<PopupEmitter>(hit.victim);
+	popup.emit(registry, victim, hit.damage);
 	const auto line = registry.create();
 	registry.emplace<Timed>(line, 0.2, true);
 	registry.emplace<Line>(
diff --git a/kurator/src/PopupEmitter.cpp b/kurator/src/PopupEmitter.cpp
new file mode 100644
index 0000000..c382ef1
--- /dev/null
+++ b/kurator/src/PopupEmitter.cpp
@@ -0,0 +1,38 @@
+#include "PopupEmitter.h"
+
+#include <string>
+
+#include <entt/entity/registry.hpp>
+#include <raylib.h>
+
+#include <kurator/sim/components.h>
+#include <kurator/sim/Point.h>
+
+#include "components.h"
+
+
+namespace kurator
+{
+
+
+void
+PopupEmitter::emit(entt::registry& registry, const sim::Transform& transform, const double damage)
+{
+	constexpr int size = 10;
+	if (!registry.valid(popup)) {
+		total = 0.0;
+		popup = registry.create();
+		registry.emplace<Timed>(popup, 1.2);
+		registry.emplace<sim::Transform>(popup, transform.position, 0.0);
+		registry.emplace<CenteredText>(popup, std::string{}, 0, size, RED);
+		registry.emplace<UIOffset>(popup, 0, 0);
+		registry.emplace<PopMove>(popup, sim::Point{0, -20}, 0.9998);
+	}
+	total += damage;
+	auto& text = registry.get<CenteredText>(popup);
+	text.text = TextFormat("%.1f", total);
+	text.width = MeasureText(text.text.c_str(), size);
+}
+
+
+}  // namespace kurator
diff --git a/kurator/src/PopupEmitter.h b/kurator/src/PopupEmitter.h
new file mode 100644
index 0000000..0d90427
--- /dev/null
+++ b/kurator/src/PopupEmitter.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <entt/entity/registry.hpp>
+
+#include <kurator/sim/components.h>
+
+
+namespace kurator
+{
+
+
+struct PopupEmitter
+{
+	entt::entity popup = entt::null;
+	double total = 0.0;
+	void emit(entt::registry& registry, const sim::Transform& transform, double damage);
+};
+
+
+}  // namespace kurator
-- 
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