[Patch] fixed the "no entity found" issue

Author: untoldengine

Sources/UntoldEngine/ECS/Scenes.swift

@@ -18,7 +18,7 @@ public struct Scene {
     public mutating func remove<T: Component>(component _: T.Type, from entityId: EntityID) {
         let entityIndex = getEntityIndex(entityId)
         guard entities[Int(entityIndex)].entityId == entityId else {
-            handleError(.entityMissing)
+            handleError(.entityMissing, entityId)
             return
         }
 
@@ -29,7 +29,7 @@ public struct Scene {
     public mutating func destroyEntity(_ entityId: EntityID) {
         let entityIndex = getEntityIndex(entityId)
         guard entities[Int(entityIndex)].entityId == entityId else {
-            handleError(.entityMissing)
+            handleError(.entityMissing, entityId)
             return
         }
         let newId = createEntityId(EntityIndex(UInt32.max), getEntityVersion(entityId))
@@ -59,7 +59,7 @@ public struct Scene {
         let entityIndex = getEntityIndex(entityId)
 
         guard entities[Int(entityIndex)].entityId == entityId else {
-            handleError(.entityMissing)
+            handleError(.entityMissing, entityId)
             return nil
         }
 
@@ -99,7 +99,7 @@ public struct Scene {
         }
 
         guard entities[Int(entityIndex)].entityId == entityId else {
-            handleError(.entityMissing)
+            handleError(.entityMissing, entityId)
             return nil
         }
 

Sources/UntoldEngine/Editor/EditorView.swift

@@ -112,12 +112,9 @@ public struct EditorView: View {
 
     private func editor_clearScene() {
         destroyAllEntities()
+        removeGizmo()
         EditorComponentsState.shared.clear()
 
-        let gameCamera = createEntity()
-        setEntityName(entityId: gameCamera, name: "Main Camera")
-        createGameCamera(entityId: gameCamera)
-
         let light = createEntity()
         setEntityName(entityId: light, name: "Directional Light")
         createDirLight(entityId: light)

Sources/UntoldEngine/Systems/RegistrationSystem.swift

@@ -39,15 +39,17 @@ public func destroyEntity(entityId: EntityID) {
 }
 
 public func destroyAllEntities() {
-    for entity in scene.getAllEntities() {
-        // scene camera should not be destroyed
-        if hasComponent(entityId: entity, componentType: SceneCameraComponent.self) {
-            continue
-        }
+    // Take a snapshot so iteration isn't affected by mutations
+    // Note, we only get parents.
+    let toDestroy = getEntitiesWithLevel(level: 0).filter {
+        !hasComponent(entityId: $0, componentType: SceneCameraComponent.self)
+    }
 
+    for entity in toDestroy {
         destroyEntity(entityId: entity)
-        globalEntityCounter = 0
     }
+
+    globalEntityCounter = 0
 }
 
 private func setEntityMeshCommon(