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使用lambda函数和模板函数重构Copy组件功能

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This commit is contained in:
Atdunbg
2025-07-06 12:58:48 +08:00
parent fadb73243d
commit 37c17bdb5c
4 changed files with 47 additions and 20 deletions
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10
Hazel/src/Hazel/Scene/Components.h
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@ -159,6 +159,16 @@ namespace Hazel
CircleCollider2DComponent() = default;
CircleCollider2DComponent(const CircleCollider2DComponent&) = default;
};
template<typename... Components>
struct ComponentGroup
{
};
using AllComponents =
ComponentGroup<TransformComponent, SpriteRendererComponent,
CircleRendererComponent, BoxCollider2DComponent,
CircleCollider2DComponent, CameraComponent,
NativeScriptComponent, RigidBody2DComponent>;
}

2
Hazel/src/Hazel/Scene/Entity.h
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@ -35,7 +35,7 @@ namespace Hazel
}
template<typename T, typename... Args>
T& AddOrRelpaceComponent(Args&&... args)
T& AddOrReplaceComponent(Args&&... args)
{
T& component = m_Scene->m_Registry.emplace_or_replace<T>(m_EntityHandle, std::forward<Args>(args)...);
m_Scene->OnComponentAdded<T>(*this, component);

48
Hazel/src/Hazel/Scene/Scene.cpp
View File

@ -40,31 +40,42 @@ namespace Hazel
delete m_PhysicsWorld;
}
template<typename Component>
template<typename... Component>
static void CopyComponent(entt::registry& dst, entt::registry& src, const std::unordered_map<UUID, entt::entity>& enttMap)
{
([&]()
{
auto view = src.view<Component>();
for (auto e : view)
for (auto srcEntity : view)
{
UUID uuid = src.get<IDComponent>(e).ID;
if (enttMap.find(uuid) == enttMap.end())
entt::entity dstEntity = enttMap.at(src.get<IDComponent>(srcEntity).ID);
auto& srcComponent = src.get<Component>(srcEntity);
dst.emplace_or_replace<Component>(dstEntity, srcComponent);
}
}(), ...);
}
template<typename... Component>
static void CopyComponent(ComponentGroup<Component ...>, entt::registry& dst, entt::registry& src, const std::unordered_map<UUID, entt::entity>& enttMap)
{
HZ_CORE_ERROR("ERROR");
assert(-1);
CopyComponent<Component ...>(dst, src, enttMap);
}
entt::entity entity = enttMap.at(uuid);
auto& component = view.get<Component>(e);
dst.emplace_or_replace<Component>(entity, component);
}
}
template<typename Component>
template<typename... Component>
static void CopyComponentIfExists(Entity dst, Entity src)
{
([&](){
if (src.HasComponent<Component>())
dst.AddOrRelpaceComponent<Component>(src.GetComponent<Component>());
dst.AddOrReplaceComponent<Component>(src.GetComponent<Component>());
}(), ...);
}
template<typename... Component>
static void CopyComponentIfExists(ComponentGroup<Component ...>, Entity dst, Entity src)
{
CopyComponentIfExists<Component ...>(dst, src);
}
Ref<Scene> Scene::Copy(Ref<Scene> other)
@ -89,6 +100,9 @@ namespace Hazel
enttMap[uuid] = (entt::entity)newEntity;
}
// Copy all components except IDComponent and TagComponent
CopyComponent(AllComponents{}, dstSceneRegistry, srcSceneRegistry, enttMap);
/*
CopyComponent<TransformComponent>(dstSceneRegistry, srcSceneRegistry, enttMap);
CopyComponent<SpriteRendererComponent>(dstSceneRegistry, srcSceneRegistry, enttMap);
CopyComponent<CircleRendererComponent>(dstSceneRegistry, srcSceneRegistry, enttMap);
@ -97,6 +111,7 @@ namespace Hazel
CopyComponent<RigidBody2DComponent>(dstSceneRegistry, srcSceneRegistry, enttMap);
CopyComponent<BoxCollider2DComponent>(dstSceneRegistry, srcSceneRegistry, enttMap);
CopyComponent<CircleCollider2DComponent>(dstSceneRegistry, srcSceneRegistry, enttMap);
*/
return newScene;
}
@ -388,6 +403,8 @@ namespace Hazel
{
Entity newEntity = CreateEntity(entity.GetName() + " copy");
CopyComponentIfExists(AllComponents{}, newEntity, entity);
/*
CopyComponentIfExists<TransformComponent>(newEntity, entity);
CopyComponentIfExists<SpriteRendererComponent>(newEntity, entity);
CopyComponentIfExists<CircleRendererComponent>(newEntity, entity);
@ -396,6 +413,7 @@ namespace Hazel
CopyComponentIfExists<RigidBody2DComponent>(newEntity, entity);
CopyComponentIfExists<BoxCollider2DComponent>(newEntity, entity);
CopyComponentIfExists<CircleCollider2DComponent>(newEntity, entity);
*/
}
Entity Scene::GetPrimaryCameraEntity()

5
Sandbox/src/Editor/EditorLayer.cpp
View File

@ -146,7 +146,6 @@ namespace Hazel
if (m_ShowPhysicsColliders)
{
// box collider
auto bcview = m_ActiveScene->GetAllEntitiesWith<TransformComponent, BoxCollider2DComponent>();
for (auto entity : bcview)
{
@ -169,7 +168,7 @@ namespace Hazel
Renderer2D::DrawRect(transform, glm::vec4(0.2f, 1.0f, 0.2f, 1.0f));
}
// circle collider
auto ccview = m_ActiveScene->GetAllEntitiesWith<TransformComponent, CircleCollider2DComponent>();
for (auto entity : ccview)
{
@ -562,7 +561,7 @@ namespace Hazel
m_CameraController.OnEvent(e);
m_EditorCamera.OnEvent(e);
}
if (e.button.clicks && m_ViewportHovered && !ImGuizmo::IsOver() && Input::IsMouseButtonPressed(SDL_BUTTON_LEFT) && !Input::IsKeyPressed(SDL_SCANCODE_LALT))
if (e.button.clicks && m_ViewportHovered && !ImGuizmo::IsOver() && Input::IsMouseButtonPressed(BUTTON_LEFT) && !Input::IsKeyPressed(SDL_SCANCODE_LALT))
m_SceneHierachyPanel.SetSelectedEntity(m_HoveredEntity);
#define SHORTCUT_EXIT (SDL_KMOD_CTRL + SDLK_W)