From 5795e8939bcd5e849c5e63e2c443bada03c93a20 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 3 Apr 2026 14:17:38 +0100
Subject: Create mix-ins for handling asset and instance lights

---
 game/mixins/lights.cpp | 30 ++++++++++++++++++++++++++++++
 game/mixins/lights.h   | 26 ++++++++++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 game/mixins/lights.cpp
 create mode 100644 game/mixins/lights.h

(limited to 'game/mixins')

diff --git a/game/mixins/lights.cpp b/game/mixins/lights.cpp
new file mode 100644
index 0000000..6829bbb
--- /dev/null
+++ b/game/mixins/lights.cpp
@@ -0,0 +1,30 @@
+#include "lights.h"
+#include "gfx/renderable.h"
+
+bool
+AssetLights::persist(Persistence::PersistenceStore & store)
+{
+	return STORE_HELPER(pointLight, Persistence::Appender<decltype(pointLight)>)
+			&& STORE_HELPER(spotLight, Persistence::Appender<decltype(spotLight)>);
+}
+
+void
+InstanceLights::lightsEnable(AnyPtr<const AssetLights> asset, uint32_t owner)
+{
+	auto createLights = [owner](const auto & assetLights, auto & lightInstances, auto commonLights) {
+		std::ranges::transform(assetLights | std::views::enumerate, std::inserter(lightInstances, lightInstances.end()),
+				[&commonLights, owner](const auto & idxAndLight) {
+					const auto & [idx, light] = idxAndLight;
+					return std::make_pair(idx, commonLights->acquire(*light, owner));
+				});
+	};
+	createLights(asset->spotLight, spotLightInstances, Renderable::commonSpotLights.lock());
+	createLights(asset->pointLight, pointLightInstances, Renderable::commonPointLights.lock());
+}
+
+void
+InstanceLights::lightsDisable()
+{
+	spotLightInstances.clear();
+	pointLightInstances.clear();
+}
diff --git a/game/mixins/lights.h b/game/mixins/lights.h
new file mode 100644
index 0000000..c2207a5
--- /dev/null
+++ b/game/mixins/lights.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include "assetFactory/lights.h"
+#include "gfx/gl/instanceVertices.h"
+#include <flat_map>
+
+class AssetLights {
+protected:
+	bool persist(Persistence::PersistenceStore & store);
+	template<typename T> using LightVec = std::vector<typename T::Ptr>;
+
+	LightVec<SpotLight> spotLight;
+	LightVec<PointLight> pointLight;
+
+	friend class InstanceLights;
+};
+
+class InstanceLights {
+protected:
+	template<typename V> using LightInstanceMap = std::flat_map<size_t, typename InstanceVertices<V>::InstanceProxy>;
+	LightInstanceMap<SpotLightVertex> spotLightInstances;
+	LightInstanceMap<PointLightVertex> pointLightInstances;
+
+	void lightsEnable(AnyPtr<const AssetLights>, uint32_t);
+	void lightsDisable();
+};
-- 
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