WIP World changes

Escape-the-Dawn/World.cpp

@@ -0,0 +1,87 @@
+#include "World.h"
+
+void World::RecycleEntityID(EntityID id)
+{
+	m_RecycledEntityIDs.push(id);
+}
+
+EntityID World::GenerateEntityID()
+{
+	if (!m_RecycledEntityIDs.empty()) {
+		EntityID id = m_RecycledEntityIDs.top();
+		m_RecycledEntityIDs.pop();
+		return id;
+	} else {
+		return ++m_LastEntityID;
+	}
+}
+
+void World::RecursiveUpdate(std::shared_ptr<System> system, double dt, EntityID parentEntity)
+{
+	for (auto pair : m_EntityParents) {
+		EntityID child = pair.first;
+		EntityID parent = pair.second;
+
+		if (parent == parentEntity)	{
+			system->Update(dt, child, parent);
+			RecursiveUpdate(system, dt, child);
+		}
+	}
+}
+
+void World::Update(double dt)
+{
+	for (auto system : m_Systems) {
+		RecursiveUpdate(system, dt, 0);
+	}
+}
+
+void World::AddSystem(System* system)
+{
+
+}
+
+//std::vector<EntityID> GetEntityChildren(EntityID entity);
+//{
+//	std::vector<EntityID> children;
+//	auto range = m_SceneGraph.equal_range(entity);
+//	for (auto it = range.first; it != range.second; ++it)
+//		children.push_back(it->second);
+//	return children;
+//}
+
+EntityID World::GetEntityParent(EntityID entity)
+{
+	auto it = m_EntityParents.find(entity);
+	return it == m_EntityParents.end() ? 0 : it->second;
+}
+
+bool World::ValidEntity(EntityID entity)
+{
+	return m_EntityParents.find(entity) != m_EntityParents.end();
+}
+
+void World::RemoveEntity(EntityID entity)
+{
+	m_EntityParents.erase(entity);
+	RecycleEntityID(entity);
+}
+
+EntityID World::CreateEntity(EntityID parent /*= 0*/)
+{
+	EntityID newEntity = GenerateEntityID();
+	m_EntityParents.insert(std::pair<EntityID, EntityID>(newEntity, parent));
+	return newEntity;
+}
+
+World::~World()
+{
+
+}
+
+World::World()
+{
+	m_LastEntityID = 0;
+
+	m_Systems.push_back(std::make_shared<Systems::Collision>(this));
+}