Method tick

src/World.cpp:22–95

const float RavEngine::World::evalNormal = 60;

void RavEngine::World::tick() {
	
	//setup framerate scaling for next frame
	auto now = clocktype::now();
	deltaTimeMicroseconds = duration_cast<timeDiff>((now-lastFrameTime));

    float deltaSeconds = deltaTimeMicroseconds.count() / 1000.0 / 1000;
    float scale = deltaSeconds * evalNormal;
    pretick(scale);
	
	//spawn entities that are pending spawn
	for (auto& e : PendingSpawn){
		Entities.insert(e);
        e->SetWorld(this);

		//start all scripts
		e->Start();
		auto coms = e->Components().GetAllComponentsOfSubclass<ScriptComponent>();
		for (auto& c : coms) {
			c->Start();
		}
        
        //make the render engine and the physics system aware of this entity
        Solver->Spawn(e);
        Renderer->Spawn(e);
		
		//for each type of component (pair of type : list), make it available to the World
		allcomponents.AddComponentsFrom(e->Components());
	}
	PendingSpawn.clear();
	
	//Tick the game code
	tick(scale);

	//process component add and removal on spawned entities
	while (!component_addremove.empty()) {
		auto& op = component_addremove.front();
		if (op.add) {
			allcomponents.AddComponentsFrom(op.store);
		}
		else {
			allcomponents.RemoveComponentsInOtherFromThis(op.store);
		}
		component_addremove.pop();
	}
	
	//destroy objects that are pending removal
	for( auto& e : PendingDestruction){
		//stop all scripts
		auto coms = e->Components().GetAllComponentsOfSubclass<ScriptComponent>();
		for (auto& c : coms) {
			c->Stop();
		}
		e->Stop();

        e->SetWorld(nullptr);
		//also remove its components
		allcomponents.RemoveComponentsInOtherFromThis(e->Components());