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template <typename T, typename... Args>
void ComponentManager::AddComponent(std::uint32_t id, Args &&... args) {
std::type_index type = typeid(
T); //Determine the type of T (this is used as the key of the unordered_map<>)
if (mComponents.find(type)
== mComponents
.end()) { //Check if this component type is already in the unordered_map<>
mComponents[type] = std::vector<std::vector<std::unique_ptr<
Component>>>(); //If not, create a new (empty) vector<> of vector<unique_ptr<Component>>
}
if (id
>= mComponents[type]
.size()) { //Resize the vector<> if the id is greater than the current size
mComponents[type].resize(
id
+ 1); //Initialize new slots to nullptr (resize does automatically init to nullptr)
}
mComponents[type][id].push_back(std::make_unique<T>(std::forward<Args>(
args)...)); //Create a new component of type T using perfect forwarding and store its unique_ptr in the vector<>
}
template <typename T>
void ComponentManager::DeleteComponentsById(std::uint32_t id) {
std::type_index type = typeid(
T); //Determine the type of T (this is used as the key of the unordered_map<>)
if (mComponents.find(type)
!= mComponents.end()) { //Find the type (in the unordered_map<>)
std::vector<std::vector<std::unique_ptr<Component>>> & componentArray
= mComponents[type]; //Get the correct vector<>
if (id
< componentArray
.size()) { //Make sure that the id (that we are looking for) is within the boundaries of the vector<>
componentArray[id]
.clear(); //Clear the whole vector<> of this specific type and id
}
}
}
template <typename T> void ComponentManager::DeleteComponents() {
std::type_index type = typeid(
T); //Determine the type of T (this is used as the key of the unordered_map<>)
if (mComponents.find(type)
!= mComponents.end()) { //Find the type (in the unordered_map<>)
mComponents[type]
.clear(); //Clear the whole vector<> of this specific type
}
}
template <typename T>
std::vector<std::reference_wrapper<T>>
ComponentManager::GetComponentsByID(std::uint32_t id) const {
std::type_index type = typeid(
T); //Determine the type of T (this is used as the key of the unordered_map<>)
std::vector<std::reference_wrapper<T>>
componentVector; //Create an empty vector<>
if (mComponents.find(type)
!= mComponents.end()) { //Find the type (in the unordered_map<>)
const std::vector<std::vector<std::unique_ptr<Component>>> &
componentArray
= mComponents.at(type); //Get the correct vector<>
if (id
< componentArray
.size()) { //Make sure that the id (that we are looking for) is within the boundaries of the vector<>
for (const std::unique_ptr<Component> & componentPtr :
componentArray[id]) { //Loop trough the whole vector<>
T * castedComponent = static_cast<T *>(
componentPtr.get()); //Cast the unique_ptr to a raw pointer
if (castedComponent) { //Ensure that the cast was successful
componentVector.push_back(
*castedComponent); //Add the dereferenced raw pointer to the vector<>
}
}
}
}
return componentVector; //Return the vector<>
}
template <typename T>
std::vector<std::reference_wrapper<T>>
ComponentManager::GetComponentsByType() const {
std::type_index type = typeid(
T); //Determine the type of T (this is used as the key of the unordered_map<>)
std::vector<std::reference_wrapper<T>>
componentVector; //Create an empty vector<>
//std::uint32_t id = 0; //Set the id to 0 (the id will also be stored in the returned vector<>)
if (mComponents.find(type)
!= mComponents.end()) { //Find the type (in the unordered_map<>)
const std::vector<std::vector<std::unique_ptr<Component>>> &
componentArray
= mComponents.at(type); //Get the correct vector<>
for (const std::vector<std::unique_ptr<Component>> & component :
componentArray) { //Loop through the whole vector<>
for (const std::unique_ptr<Component> & componentPtr :
component) { //Loop trough the whole vector<>
T * castedComponent = static_cast<T *>(
componentPtr.get()); //Cast the unique_ptr to a raw pointer
if (castedComponent) { //Ensure that the cast was successful
componentVector.emplace_back(std::ref(
*castedComponent)); //Pair the dereferenced raw pointer and the id and add it to the vector<>
}
}
//++id; //Increase the id (the id will also be stored in the returned vector<>)
}
}
return componentVector; //Return the vector<>
}
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