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/systems/light.cpp | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 src/systems/light.cpp

(limited to 'src/systems')

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);
+}
+
-- 
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