From 7644b740e87053838f3c7a80e88ad192fcf1a5e2 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Sat, 21 Oct 2017 13:50:04 -0400
Subject: lightsgit status! fireflies

---
 src/engine.cpp        |  3 +++
 src/render.cpp        |  2 ++
 src/systems/light.cpp | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/world.cpp         |  2 ++
 4 files changed, 67 insertions(+)
 create mode 100644 src/systems/light.cpp

(limited to 'src')

diff --git a/src/engine.cpp b/src/engine.cpp
index bf0bca9..232d11c 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -13,6 +13,7 @@
 #include <particle.hpp>
 #include <weather.hpp>
 #include <attack.hpp>
+#include <systems/light.hpp>
 
 Engine::Engine(void)
     : shouldRun(true), systems(game::entities, game::events)
@@ -40,6 +41,7 @@ void Engine::init(void) {
 	systems.add<AttackSystem>();
 
 	systems.add<UISystem>();
+	systems.add<LightSystem>();
 	systems.add<SDLReceiver>();
 
     systems.configure();
@@ -69,6 +71,7 @@ void Engine::update(entityx::TimeDelta dt)
 	systems.update<ParticleSystem>(dt);
 	systems.update<AttackSystem>(dt);
 	systems.update<RenderSystem>(dt);
+	systems.update<LightSystem>(dt);
 	//systems.update<UISystem>(dt);
 }
 
diff --git a/src/render.cpp b/src/render.cpp
index 85384ce..f9f84c9 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -7,6 +7,7 @@
 #include <glm.hpp>
 #include <font.hpp>
 #include <texture.hpp>
+#include <systems/light.hpp>
 
 extern vec2 offset;
 
@@ -198,5 +199,6 @@ void render(const int& fps)
 		FontSystem::setFontZ();
 	}
 	
+	LightSystem::render();
 	WindowSystem::render();
 }
diff --git a/src/systems/light.cpp b/src/systems/light.cpp
new file mode 100644
index 0000000..361099d
--- /dev/null
+++ b/src/systems/light.cpp
@@ -0,0 +1,60 @@
+#include <systems/light.hpp>
+
+#include <components/light.hpp>
+#include <components/position.hpp>
+#include <components/solid.hpp>
+
+std::vector<Light> LightSystem::lights;
+
+void LightSystem::update(entityx::EntityManager& en, entityx::EventManager& ev, entityx::TimeDelta dt) {
+	(void)ev;
+	(void)dt;
+
+	en.each<Illuminate, Position, Solid>([&](entityx::Entity e, Illuminate& ill, Position& pos,
+		Solid& dim) {
+		(void)e;
+		vec2 p (pos.x, pos.y);
+		vec2 d (dim.width, dim.height);
+		LightSystem::updateLight(ill.index, p + d / 2); 
+	});
+}
+
+void LightSystem::render(void) {
+	auto coords = new GLfloat[lights.size() * 4];
+	auto colors = new GLfloat[lights.size() * 4];
+
+	unsigned int offset = 0;
+	for (const auto& l : lights) {
+		coords[offset] = l.pos.x, coords[offset + 1] = l.pos.y,
+			coords[offset + 2] = 0, coords[offset + 3] = l.radius;
+		colors[offset] = l.color.red, colors[offset + 1] = l.color.green,
+			colors[offset + 2] = l.color.blue, colors[offset + 3] = 1.0f;
+		offset += 4;
+	}
+
+	Render::worldShader.use();
+	Render::worldShader.enable();
+
+	glUniform4fv(Render::worldShader.uniform[WU_light], lights.size(), coords);
+	glUniform4fv(Render::worldShader.uniform[WU_light_color], lights.size(), colors);
+	glUniform1i(Render::worldShader.uniform[WU_light_size], lights.size());
+
+	Render::worldShader.disable();
+	Render::worldShader.unuse();
+}
+
+int LightSystem::addLight(vec2 pos, float radius, Color color) {
+	lights.emplace_back(pos, radius, color);
+	return lights.size() - 1;
+}
+
+void LightSystem::updateLight(int index, vec2 pos, float radius) {
+	lights[index].pos = pos;
+	if (radius >= 0)
+		lights[index].radius = radius;
+}
+
+void LightSystem::removeLight(int index) {
+	lights.erase(lights.begin() + index);
+}
+
diff --git a/src/world.cpp b/src/world.cpp
index b163979..ea2566a 100644
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -371,6 +371,8 @@ void WorldSystem::loader(void)
 						entity.assign<Trigger>(wxml, abcd);
 					else if (tname == "Drop")
 						entity.assign<Drop>(wxml, abcd);
+					else if (tname == "Illuminate")
+						entity.assign<Illuminate>(wxml, abcd);
 
 					abcd = abcd->NextSiblingElement();
 				}
-- 
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