FrustumOctree has its own system, won't cull away explosion effects.

src/Engine/Collision/FillFrustumOctreeSystem.cpp

@@ -0,0 +1,21 @@
+#include "Collision/FillFrustumOctreeSystem.h"
+
+void FillFrustumOctreeSystem::Update(double dt)
+{
+    m_Octree->ClearDynamicObjects();
+}
+
+void FillFrustumOctreeSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& component, double dt)
+{
+    if (entity.HasComponent("ExplosionEffect")) {
+        //TODO: Fix hack, get real box by using shader equation.
+        EntityAABB aabb = AABB(glm::vec3(-300), glm::vec3(300));
+        aabb.Entity = entity;
+        m_Octree->AddDynamicObject(aabb);
+    } else {
+        boost::optional<EntityAABB> absoluteAABB = Collision::EntityAbsoluteAABB(entity);
+        if (absoluteAABB) {
+            m_Octree->AddDynamicObject(*absoluteAABB);
+        }
+    }
+}