Minor - Améliore la gestion des entités ImGui - V14.8.0

Optimizes entity list updates in the ImGui interface by caching entity names and IDs.

This reduces unnecessary string operations during rendering and improves performance, especially when dealing with a large number of entities.

The initial ImGui window size has also been reduced for performance reasons.

enginecustom/imgui.ini

@@ -1,6 +1,6 @@
 [Window][DockSpace]
 Pos=0,0
-Size=1536,793
+Size=32,32
 Collapsed=0
 
 [Window][Debug##Default]
@@ -22,15 +22,15 @@ DockId=0x00000009,0
 
 [Window][Objects]
 Pos=0,19
-Size=251,774
+Size=15,22
 Collapsed=0
-DockId=0x0000000B,1
+DockId=0x0000000B,0
 
 [Window][Terrain]
 Pos=0,19
-Size=251,774
+Size=15,22
 Collapsed=0
-DockId=0x0000000B,0
+DockId=0x0000000B,1
 
 [Window][Log Window]
 Pos=0,630
@@ -57,7 +57,7 @@ Collapsed=0
 DockId=0x00000002,0
 
 [Docking][Data]
-DockSpace         ID=0xCCBD8CF7 Window=0x3DA2F1DE Pos=0,19 Size=1536,774 Split=X
+DockSpace         ID=0xCCBD8CF7 Window=0x3DA2F1DE Pos=0,19 Size=32,22 Split=X
   DockNode        ID=0x00000001 Parent=0xCCBD8CF7 SizeRef=1350,842 Split=X
     DockNode      ID=0x00000005 Parent=0x00000001 SizeRef=1265,842 Split=Y
       DockNode    ID=0x00000003 Parent=0x00000005 SizeRef=1584,609 Split=X

enginecustom/src/inc/system/imguiManager.h

@@ -39,6 +39,12 @@ struct ComponentEntry {
 	std::function<void()> addFunc;
 };
 
+struct CachedEntity
+{
+	std::string name;
+	ecs::EntityID id;
+};
+
 class imguiManager
 {
 public:
@@ -175,6 +181,10 @@ private:
 	// --------------------------------------------- //
 	// ----------------- Functions ----------------- //
 	// --------------------------------------------- //
+	/**
+	 * Update the cached entity list if there is a new, delete or rename entity
+	 */
+	void UpdateCachedEntitiesIfNeeded();
 
 	// --------------------------------------------- //
 	// ----------------- Variables ----------------- //
@@ -232,6 +242,8 @@ private:
 	std::string version_driver_;
 
 	ecs::EntityID m_selected_entity_id = 0; // ID of the currently selected entity
+	std::vector<CachedEntity> cachedEntities_;
+	bool entityListDirty = true;
 
 	int BUILD_VERSION_VER = -1;
 };

enginecustom/src/src/system/imguiManager.cpp

@@ -603,25 +603,17 @@ void imguiManager::WidgetObjectWindow()
 	TEXT_V("Number of cubes: %d", entity_manager_->GetEntityCount())
 	SEP
 
-	auto entities = entity_manager_->GetAllEntities();
+	UpdateCachedEntitiesIfNeeded();
 
 	ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing,ImVec2(4,2));
 
-	for (auto& entity : entities)
+	for (auto& cachedEntitie : cachedEntities_)
 	{
-		auto identity = entity->GetComponent<ecs::IdentityComponent>();
-		if (identity)
+		bool isSelected = (cachedEntitie.id == m_selected_entity_id);
+		if (SEL(cachedEntitie.name.c_str(), isSelected))
 		{
-			std::string name = identity->GetName();
-			if (name.empty()) name = "Entity #" + std::to_string(identity->GetId());
-			// avoid same label by adding the ID at the end
-			name += "##" + std::to_string(identity->GetId());
-			bool isSelected = (entity->GetID() == m_selected_entity_id);
-			if (SEL(name.c_str(), isSelected))
-			{
-				m_selected_entity_id = entity->GetID();
-				show_inspector_window_ = true;
-			}
+			m_selected_entity_id = cachedEntitie.id;
+			show_inspector_window_ = true;
 		}
 	}
 
@@ -1223,3 +1215,18 @@ void imguiManager::WidgetRenderStats()
     END
 }
 
+void imguiManager::UpdateCachedEntitiesIfNeeded() {
+	if (!entityListDirty) return;
+	cachedEntities_.clear();
+	auto entities = entity_manager_->GetAllEntities();
+	for (auto& entity : entities) {
+		auto identity = entity->GetComponent<ecs::IdentityComponent>();
+		if (identity) {
+			std::string name = identity->GetName();
+			if (name.empty())
+				name = "Entity " + std::to_string(identity->GetId());
+			cachedEntities_.push_back({ name, identity->GetId() });
+		}
+	}
+	entityListDirty = false;
+}