From 97257c552c546c1924ccc9348f0ad7a95dea169b Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Mon, 5 Dec 2022 00:32:14 +0100
Subject: Extracted force balance bar into own file

---
 kurator/CMakeLists.txt       |  1 +
 kurator/src/Battle.cpp       | 14 ++------------
 kurator/src/Battle.h         |  2 ++
 kurator/src/ForceBalance.cpp | 43 +++++++++++++++++++++++++++++++++++++++++++
 kurator/src/ForceBalance.h   | 23 +++++++++++++++++++++++
 5 files changed, 71 insertions(+), 12 deletions(-)
 create mode 100644 kurator/src/ForceBalance.cpp
 create mode 100644 kurator/src/ForceBalance.h

diff --git a/kurator/CMakeLists.txt b/kurator/CMakeLists.txt
index 61b348c..fab8d3f 100644
--- a/kurator/CMakeLists.txt
+++ b/kurator/CMakeLists.txt
@@ -3,6 +3,7 @@ add_executable(
 	${PROJECT_NAME}
 	src/Battle.cpp
 	src/colors.cpp
+	src/ForceBalance.cpp
 	src/main.cpp
 	src/Session.cpp
 	src/Skybox.cpp
diff --git a/kurator/src/Battle.cpp b/kurator/src/Battle.cpp
index 7bb4e7d..9c5afc6 100644
--- a/kurator/src/Battle.cpp
+++ b/kurator/src/Battle.cpp
@@ -63,6 +63,7 @@ Battle::update(const float dt)
 		pop.speed.x -= damp.x;
 		pop.speed.y -= damp.y;
 	}
+	balance.update(registry);
 	if (IsKeyPressed(KEY_SPACE))
 		session->set(std::make_shared<Title>(session));
 }
@@ -99,18 +100,7 @@ Battle::draw() const
 		const int y = hheight + transform.position.y*scale - text.font_size/2 + offset.y;
 		DrawText(text.text.c_str(), x, y, text.font_size, text.color);
 	}
-	auto points = registry.view<sim::HitPoints, sim::Team>();
-	double totals[2] {0.0, 0.0};  // FIXME and extract
-	for (const auto& [entity, points, team] : points.each()) {
-		if (team.id < 2)
-			totals[team.id] += points.health;
-	}
-	const int x1 = hwidth / 2.0;
-	const int w1 = hwidth * totals[1] / (totals[0] + totals[1]);
-	const int x2 = x1 + w1;
-	const int w2 = hwidth * totals[0] / (totals[0] + totals[1]);
-	DrawRectangle(x1, 10, w1, 10, GREEN);
-	DrawRectangle(x2, 10, w2, 10, RED);
+	balance.draw();
 }
 
 
diff --git a/kurator/src/Battle.h b/kurator/src/Battle.h
index 85d4b18..b3a0d38 100644
--- a/kurator/src/Battle.h
+++ b/kurator/src/Battle.h
@@ -5,6 +5,7 @@
 #include <kurator/sim/Battle.h>
 #include <kurator/sim/events.h>
 
+#include "ForceBalance.h"
 #include "Scene.h"
 #include "Session.h"
 
@@ -24,6 +25,7 @@ public:
 private:
 	std::shared_ptr<Session> session;
 	std::unique_ptr<sim::Battle> battle;
+	ForceBalance balance;
 };
 
 
diff --git a/kurator/src/ForceBalance.cpp b/kurator/src/ForceBalance.cpp
new file mode 100644
index 0000000..4d56357
--- /dev/null
+++ b/kurator/src/ForceBalance.cpp
@@ -0,0 +1,43 @@
+#include "ForceBalance.h"
+
+#include <entt/entity/registry.hpp>
+#include <raylib.h>
+
+#include <kurator/sim/components.h>
+
+#include "colors.h"
+
+
+namespace kurator
+{
+
+
+void
+ForceBalance::update(const entt::registry& registry)
+{
+	total = 0.0;
+	teams.clear();
+	auto points = registry.view<sim::HitPoints, sim::Team>();
+	for (const auto& [entity, points, team] : points.each()) {
+		while (teams.size() <= static_cast<unsigned>(team.id))
+			teams.emplace_back(0.0);
+		total += points.health;
+		teams[team.id] += points.health;
+	}
+}
+
+
+void
+ForceBalance::draw() const
+{
+	const int width = GetScreenWidth() / 2;
+	int x = GetScreenWidth() / 4;
+	for (unsigned int i = 0; i < teams.size(); ++i) {
+		const int segment = width * teams[i] / total;
+		DrawRectangle(x, 10, segment, 10, team_color(i));
+		x += segment;
+	}
+}
+
+
+}  // namespace kurator
diff --git a/kurator/src/ForceBalance.h b/kurator/src/ForceBalance.h
new file mode 100644
index 0000000..317a4e8
--- /dev/null
+++ b/kurator/src/ForceBalance.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <vector>
+
+#include <entt/entity/registry.hpp>
+
+
+namespace kurator
+{
+
+
+class ForceBalance
+{
+public:
+	void update(const entt::registry& registry);
+	void draw() const;
+private:
+	double total;
+	std::vector<double> teams;
+};
+
+
+}  // namespace kurator
-- 
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