AMZN-koppersr
5e4094b258
Updated AzFramework::Scene to allow it to serve as the one-stop location for localized singletons. Localized singletons in this case are instance that can only occur once in an environment but multiple times within an application. As an example, this allows settings up a single camera per viewport for instance. Highlights of changes: Replaced the original ebuses with interfaces and events for easy of use and performance. Removed the Entity Context specific code and moved that to new locations within the Entity Context itself. Allowed basic inheritance. If a subsystem isn't found in a scene the parent can optionally be searched. Scenes can enter a zombie state and avoid immediately being deleted. This is needed for situations where subsystems can't be destroyed until async calls have been completed.
116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#include <AzFramework/Scene/Scene.h>
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namespace AzFramework
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{
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Scene::Scene(AZStd::string name)
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: m_name(AZStd::move(name))
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{
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}
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Scene::Scene(AZStd::string name, AZStd::shared_ptr<Scene> parent)
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: m_name(AZStd::move(name))
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, m_parent(AZStd::move(parent))
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{
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}
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Scene::~Scene()
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{
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m_removalEvent.Signal(*this, RemovalEventType::Destroyed);
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}
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const AZStd::string& Scene::GetName() const
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{
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return m_name;
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}
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const AZStd::shared_ptr<Scene>& Scene::GetParent()
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{
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return m_parent;
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}
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AZStd::shared_ptr<const Scene> Scene::GetParent() const
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{
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return m_parent;
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}
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bool Scene::IsAlive() const
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{
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return m_isAlive;
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}
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void Scene::ConnectToEvents(RemovalEvent::Handler& handler)
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{
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handler.Connect(m_removalEvent);
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}
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void Scene::ConnectToEvents(SubsystemEvent::Handler& handler)
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{
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handler.Connect(m_subsystemEvent);
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}
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AZStd::any* Scene::FindSubsystem(const AZ::TypeId& typeId)
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{
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AZStd::any* result = FindSubsystemInScene(typeId);
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return (!result && m_parent) ? m_parent->FindSubsystem(typeId) : result;
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}
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const AZStd::any* Scene::FindSubsystem(const AZ::TypeId& typeId) const
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{
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return const_cast<Scene*>(this)->FindSubsystem(typeId);
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}
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AZStd::any* Scene::FindSubsystemInScene(const AZ::TypeId& typeId)
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{
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// Spot check that the internal arrays remain consistent.
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AZ_Assert(
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m_systemKeys.size() == m_systemObjects.size(), "Key and object list in AzFramework::Scene '%s' have gone out of sync.",
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m_name.c_str());
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const size_t m_systemKeysCount = m_systemKeys.size();
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for (size_t i = 0; i < m_systemKeysCount; ++i)
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{
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if (m_systemKeys[i] != typeId)
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{
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continue;
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}
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else
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{
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return &m_systemObjects[i];
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}
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}
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return nullptr;
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}
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const AZStd::any* Scene::FindSubsystemInScene(const AZ::TypeId& typeId) const
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{
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return const_cast<Scene*>(this)->FindSubsystemInScene(typeId);
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}
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void Scene::MarkForDestruction()
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{
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m_isAlive = false;
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m_removalEvent.Signal(*this, RemovalEventType::Zombified);
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}
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void Scene::RemoveSubsystem(size_t index, const AZ::TypeId& subsystemType)
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{
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m_systemKeys[index] = m_systemKeys.back();
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m_systemObjects[index] = AZStd::move(m_systemObjects.back());
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m_systemKeys.pop_back();
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m_systemObjects.pop_back();
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m_subsystemEvent.Signal(*this, SubsystemEventType::Removed, subsystemType);
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}
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}
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