From f77c0c278f343422ce5c7a55ec5c126b3e190f77 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sun, 19 Feb 2023 00:35:48 +0100
Subject: Draw turret ranges for selected ships

---
 kurator/src/Battle.cpp  |  1 +
 kurator/src/inspect.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++++--
 kurator/src/inspect.h   | 12 ++++++++++
 kurator/src/markers.cpp |  7 +++---
 kurator/src/markers.h   |  1 +
 5 files changed, 74 insertions(+), 5 deletions(-)

diff --git a/kurator/src/Battle.cpp b/kurator/src/Battle.cpp
index 93a1444..b0719ea 100644
--- a/kurator/src/Battle.cpp
+++ b/kurator/src/Battle.cpp
@@ -161,6 +161,7 @@ Battle::draw() const
 {
 	ClearBackground(BLACK);
 	Grid().draw(ctx.camera);
+	draw_turret_visuals(ctx);
 	draw_crosses(ctx);
 	draw_lines(ctx);
 	draw_markers(ctx);
diff --git a/kurator/src/inspect.cpp b/kurator/src/inspect.cpp
index 4dff0a6..4795068 100644
--- a/kurator/src/inspect.cpp
+++ b/kurator/src/inspect.cpp
@@ -5,6 +5,7 @@
 #include <entt/entt.hpp>
 #include <imgui.h>
 
+#include <kurator/sim/components.h>
 #include <kurator/sim/FloatingMovement.h>
 #include <kurator/sim/HitPoints.h>
 #include <kurator/sim/TurretControl.h>
@@ -12,6 +13,8 @@
 #include <kurator/universe/TurretType.h>
 #include <kurator/universe/UniqueIdentifier.h>
 
+#include "markers.h"
+
 
 namespace kurator
 {
@@ -40,6 +43,7 @@ InspectionWindow::show()
 	if (ImGui::Begin("Inspect", &open)) {
 		auto it = selected.begin();
 		while (it != selected.end()) {
+			ImGui::PushID(it - selected.begin());
 			if (!it->valid()) {
 				it = selected.erase(it);
 				continue;
@@ -49,30 +53,52 @@ InspectionWindow::show()
 			inspect<universe::TurretType>(*it);
 			inspect<sim::FloatingMovement>(*it);
 			inspect<sim::HitPoints>(*it);
+			inspect<TurretVisuals>(*it);
 			it = std::next(it);
+			ImGui::PopID();
 		}
 		if (selected.empty())
 			ImGui::Text("Nothing selected");
 	}
 	ImGui::End();
+	if (!open)
+		deselect();
 }
 
 
 void
 InspectionWindow::select(entt::handle entity)
 {
-	selected.clear();
+	deselect();
+	if (!entity)
+		return;
+	entity.get<Marker>().selected = true;
 	auto* registry = entity.registry();
 	auto turrets = registry->view<sim::TurretControl>();
 	selected.push_back(std::move(entity));
 	for (auto&& [entity_, turret] : turrets.each()) {
-		if (turret.owner == entity)
+		if (turret.owner == entity) {
+			registry->emplace<TurretVisuals>(entity_);
 			selected.push_back(entt::handle{*registry, entity_});
+		}
 	}
 	open = true;
 }
 
 
+void
+InspectionWindow::deselect()
+{
+	for (auto&& entity_ : selected) {
+		if (entity_.all_of<Marker>())
+			entity_.get<Marker>().selected = false;
+		if (entity_.all_of<TurretVisuals>())
+			entity_.remove<TurretVisuals>();
+	}
+	selected.clear();
+}
+
+
 template <>
 void
 inspect(entt::handle&, universe::UniqueIdentifier& identifier)
@@ -117,4 +143,32 @@ inspect(entt::handle&, sim::HitPoints& points)
 }
 
 
+template <>
+void
+inspect(entt::handle&, TurretVisuals& visuals)
+{
+	ImGui::Checkbox("Show Turret Ranges", &visuals.visible);
+}
+
+
+static Color OPTIMAL {0x88, 0x22, 0x22, 0xff};
+static Color EFFECTIVE {0x77, 0x50, 0x22, 0xff};
+
+void
+draw_turret_visuals(const sim::State& ctx)
+{
+	const auto helpers = ctx.registry.view<TurretVisuals, universe::TurretType, sim::TurretControl>();
+	for (const auto& [entity, visuals, type, turret] : helpers.each()) {
+		if (!visuals.visible)
+			continue;
+		const auto& transform = ctx.registry.get<sim::Transform>(turret.owner);
+		const auto center = ctx.camera.to_screen(transform.position);
+		const auto optimal = type.optimal_range * ctx.camera.scale;
+		const auto effective = type.effective_range() * ctx.camera.scale;
+		DrawCircleLines(center.x, center.y, optimal, OPTIMAL);
+		DrawCircleLines(center.x, center.y, effective, EFFECTIVE);
+	}
+}
+
+
 }  // namespace kurator
diff --git a/kurator/src/inspect.h b/kurator/src/inspect.h
index 77daa76..b123219 100644
--- a/kurator/src/inspect.h
+++ b/kurator/src/inspect.h
@@ -4,6 +4,8 @@
 
 #include <entt/entt.hpp>
 
+#include <kurator/sim/State.h>
+
 
 namespace kurator
 {
@@ -15,7 +17,17 @@ struct InspectionWindow
 	std::vector<entt::handle> selected = {};
 	void show();
 	void select(entt::handle entity);
+	void deselect();
 };
 
 
+struct TurretVisuals
+{
+	bool visible = true;
+};
+
+
+void draw_turret_visuals(const sim::State& ctx);
+
+
 }  // namespace kurator
diff --git a/kurator/src/markers.cpp b/kurator/src/markers.cpp
index 2b04129..f9e19b7 100644
--- a/kurator/src/markers.cpp
+++ b/kurator/src/markers.cpp
@@ -72,11 +72,12 @@ draw_markers(const sim::State& ctx)
 		}
 		const engine::Point direction {std::cos(transform.angle), std::sin(transform.angle)};
 		const auto edge = pos + direction.scale(marker.radius);
-		if (marker.hovered)
-			DrawCircle(pos.x, pos.y, marker.radius + 2, WHITE);
+		if (marker.hovered || marker.selected)
+			DrawCircle(pos.x, pos.y, marker.radius + 2, marker.selected ? YELLOW : WHITE);
 		DrawCircle(pos.x, pos.y, marker.radius, marker.color);
 		DrawLine(pos.x, pos.y, edge.x, edge.y, WHITE);
-		DrawText(marker.name.c_str(), pos.x+10, pos.y-5, 10.0f, marker.hovered ? WHITE : GRAY);
+		const auto colour = marker.selected ? YELLOW : marker.hovered ? WHITE : GRAY;
+		DrawText(marker.name.c_str(), pos.x+10, pos.y-5, 10.0f, colour);
 	}
 }
 
diff --git a/kurator/src/markers.h b/kurator/src/markers.h
index a702b2e..c2fdd8b 100644
--- a/kurator/src/markers.h
+++ b/kurator/src/markers.h
@@ -21,6 +21,7 @@ struct Marker
 	Color color;
 	std::string name;
 	bool hovered = false;
+	bool selected = false;
 };
 
 
-- 
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