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refactor!: renamed GameManager to Universe and HierarchyObject to UniverseObject

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Syntriax
2025-04-13 21:57:05 +03:00
parent a9f5974568
commit 70c884acfe
46 changed files with 749 additions and 750 deletions
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26
Engine.Core/Abstract/Assignable/IHasGameManager.cs
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@@ -1,26 +0,0 @@
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="ITransform2D"/> field.
/// </summary>
public interface IHasGameManager : IAssignable
{
/// <summary>
/// Event triggered when the <see cref="IGameManager"/> value has has been assigned a new value.
/// </summary>
event GameManagerAssignedEventHandler? OnGameManagerAssigned;
/// <inheritdoc cref="IGameManager" />
IGameManager GameManager { get; }
/// <summary>
/// Assign a value to the <see cref="IGameManager"/> field of this object.
/// </summary>
/// <param name="gameManager">New <see cref="IGameManager"/> to assign.</param>
/// <returns>
/// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
/// </returns>
bool Assign(IGameManager gameManager);
delegate void GameManagerAssignedEventHandler(IHasGameManager sender);
}

26
Engine.Core/Abstract/Assignable/IHasHierarchyObject.cs
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@@ -1,26 +0,0 @@
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IHierarchyObject"/> field.
/// </summary>
public interface IHasHierarchyObject : IAssignable
{
/// <summary>
/// Event triggered when the <see cref="IHierarchyObject"/> value has has been assigned a new value.
/// </summary>
event HierarchyObjectAssignedEventHandler? OnHierarchyObjectAssigned;
/// <inheritdoc cref="IHierarchyObject" />
IHierarchyObject HierarchyObject { get; }
/// <summary>
/// Assign a value to the <see cref="IHierarchyObject"/> field of this object.
/// </summary>
/// <param name="hierarchyObject">New <see cref="IHierarchyObject"/> to assign.</param>
/// <returns>
/// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
/// </returns>
bool Assign(IHierarchyObject hierarchyObject);
delegate void HierarchyObjectAssignedEventHandler(IHasHierarchyObject sender);
}

26
Engine.Core/Abstract/Assignable/IHasUniverse.cs Normal file
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@@ -0,0 +1,26 @@
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IUniverse"/> field.
/// </summary>
public interface IHasUniverse : IAssignable
{
/// <summary>
/// Event triggered when the <see cref="IUniverse"/> value has has been assigned a new value.
/// </summary>
event UniverseAssignedEventHandler? OnUniverseAssigned;
/// <inheritdoc cref="IUniverse" />
IUniverse Universe { get; }
/// <summary>
/// Assign a value to the <see cref="IUniverse"/> field of this object.
/// </summary>
/// <param name="universe">New <see cref="IUniverse"/> to assign.</param>
/// <returns>
/// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
/// </returns>
bool Assign(IUniverse universe);
delegate void UniverseAssignedEventHandler(IHasUniverse sender);
}

26
Engine.Core/Abstract/Assignable/IHasUniverseObject.cs Normal file
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@@ -0,0 +1,26 @@
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IUniverseObject"/> field.
/// </summary>
public interface IHasUniverseObject : IAssignable
{
/// <summary>
/// Event triggered when the <see cref="IUniverseObject"/> value has has been assigned a new value.
/// </summary>
event UniverseObjectAssignedEventHandler? OnUniverseObjectAssigned;
/// <inheritdoc cref="IUniverseObject" />
IUniverseObject UniverseObject { get; }
/// <summary>
/// Assign a value to the <see cref="IUniverseObject"/> field of this object.
/// </summary>
/// <param name="universeObject">New <see cref="IUniverseObject"/> to assign.</param>
/// <returns>
/// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
/// </returns>
bool Assign(IUniverseObject universeObject);
delegate void UniverseObjectAssignedEventHandler(IHasUniverseObject sender);
}

2
Engine.Core/Abstract/IBehaviour.cs
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@@ -1,7 +1,7 @@
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents a behaviour that any object in the game might use to interact with itself or other objects.
/// Represents a behaviour that any object in the engine that might use to interact with itself or other objects.
/// </summary>
public interface IBehaviour : IEntity, IActive, IHasBehaviourController, IHasStateEnable
{

4
Engine.Core/Abstract/IBehaviourCollector.cs
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@@ -4,10 +4,10 @@ namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents a collector for the class type of <typeparamref name="T"/>.
/// Provides mechanisms for tracking additions and removals, and notifies subscribers when such events occur on the assigned <see cref="IGameManager"/>.
/// Provides mechanisms for tracking additions and removals, and notifies subscribers when such events occur on the assigned <see cref="IUniverse"/>.
/// </summary>
/// <typeparam name="T">The type of objects tracked by the collector.</typeparam>
public interface IBehaviourCollector<T> : IHasGameManager, IEnumerable<T> where T : class
public interface IBehaviourCollector<T> : IHasUniverse, IEnumerable<T> where T : class
{
/// <summary>
/// Event triggered when an object of type <typeparamref name="T"/> is added to the collector.

4
Engine.Core/Abstract/IBehaviourController.cs
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@@ -3,9 +3,9 @@ using System.Collections.Generic;
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents a controller for managing <see cref="IBehaviour"/>s and notify them accordingly about the engine's updates. Connected to an <see cref="IHierarchyObject"/>.
/// Represents a controller for managing <see cref="IBehaviour"/>s and notify them accordingly about the engine's updates. Connected to an <see cref="IUniverseObject"/>.
/// </summary>
public interface IBehaviourController : IInitializable, IHasHierarchyObject, IEnumerable<IBehaviour>
public interface IBehaviourController : IInitializable, IHasUniverseObject, IEnumerable<IBehaviour>
{
/// <summary>
/// Event triggered before the update of <see cref="IBehaviour"/>s.

91
Engine.Core/Abstract/IGameManager.cs
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@@ -1,91 +0,0 @@
using System.Collections.Generic;
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents a game world responsible for managing <see cref="IHierarchyObject"/>s.
/// </summary>
public interface IGameManager : IEntity, IEnumerable<IHierarchyObject>
{
/// <summary>
/// Event triggered when <see cref="Update(EngineTime)"/> is about to be called called on the <see cref="IGameManager"/>.
/// </summary>
event UpdateEventHandler? OnPreUpdate;
/// <summary>
/// Event triggered when <see cref="Update(EngineTime)"/> is called on the <see cref="IGameManager"/>.
/// </summary>
event UpdateEventHandler? OnUpdate;
/// <summary>
/// Event triggered when <see cref="PreDraw"/> is called on the <see cref="IGameManager"/>.
/// </summary>
event PreDrawEventHandler? OnPreDraw;
/// <summary>
/// Event triggered when a <see cref="IHierarchyObject"/> is registered to the <see cref="IGameManager"/>.
/// </summary>
event HierarchyObjectRegisteredEventHandler? OnHierarchyObjectRegistered;
/// <summary>
/// Event triggered when a <see cref="IHierarchyObject"/> is unregistered from the <see cref="IGameManager"/>.
/// </summary>
event HierarchyObjectUnRegisteredEventHandler? OnHierarchyObjectUnRegistered;
/// <summary>
/// Current time scale the <see cref="IGameManager"/> operates on.
/// </summary>
float TimeScale { get; set; }
/// <summary>
/// Contains time data related to this <see cref="IGameManager"/>.
/// </summary>
EngineTime Time { get; }
/// <summary>
/// Contains unscaled time data related to this <see cref="IGameManager"/>.
/// </summary>
EngineTime UnscaledTime { get; }
/// <summary>
/// Gets a read-only list of <see cref="IHierarchyObject"/>s managed by the <see cref="IGameManager"/>.
/// </summary>
IReadOnlyList<IHierarchyObject> HierarchyObjects { get; }
/// <summary>
/// Registers an <see cref="IHierarchyObject"/> to the <see cref="IGameManager"/>.
/// </summary>
/// <param name="hierarchyObject">The <see cref="IHierarchyObject"/> to register.</param>
void Register(IHierarchyObject hierarchyObject);
/// <summary>
/// Instantiates a <see cref="IHierarchyObject"/> of type T with the given arguments and registers it to the <see cref="IGameManager"/>.
/// </summary>
/// <typeparam name="T">The type of <see cref="IHierarchyObject"/> to instantiate.</typeparam>
/// <param name="args">Constructor parameters for the given type of <see cref="IHierarchyObject"/>.</param>
/// <returns>The instantiated <see cref="IHierarchyObject"/>.</returns>
T InstantiateHierarchyObject<T>(params object?[]? args) where T : class, IHierarchyObject;
/// <summary>
/// Removes an <see cref="IHierarchyObject"/> from the <see cref="IGameManager"/>.
/// </summary>
/// <param name="hierarchyObject">The <see cref="IHierarchyObject"/> to remove.</param>
void Remove(IHierarchyObject hierarchyObject);
/// <summary>
/// Updates the <see cref="IGameManager"/> with the given delta time.
/// </summary>
/// <param name="engineTime">Delta time.</param>
void Update(EngineTime engineTime);
/// <summary>
/// Performs operations that should be done before the draw calls.
/// </summary>
void PreDraw();
delegate void UpdateEventHandler(IGameManager sender, EngineTime engineTime);
delegate void PreDrawEventHandler(IGameManager sender);
delegate void HierarchyObjectRegisteredEventHandler(IGameManager sender, IHierarchyObject hierarchyObjectRegistered);
delegate void HierarchyObjectUnRegisteredEventHandler(IGameManager sender, IHierarchyObject hierarchyObjectUnregistered);
}

131
Engine.Core/Abstract/IHierarchyObject.cs
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@@ -1,131 +0,0 @@
using System.Collections.Generic;
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents an <see cref="IEntity"/> that can enter and exit a hierarchy within the <see cref="IGameManager"/> system.
/// This interface allows for tracking the object's presence in the hierarchy and provides events
/// for notifying when the see enters or exits the hierarchy.
/// </summary>
public interface IHierarchyObject : IEntity, IActive, INameable, IHasBehaviourController, IEnumerable<IHierarchyObject>
{
/// <summary>
/// Event triggered when the <see cref="IHierarchyObject"/> enters the hierarchy.
/// </summary>
event EnteredHierarchyEventHandler? OnEnteredHierarchy;
/// <summary>
/// Event triggered when the <see cref="IHierarchyObject"/> exits the hierarchy.
/// </summary>
event ExitedHierarchyEventHandler? OnExitedHierarchy;
/// <summary>
/// Event triggered when the <see cref="Parent"/> of the <see cref="IHierarchyObject"/> changes. The second parameter is the old <see cref="IHierarchyObject"/>.
/// </summary>
event ParentChangedEventHandler? OnParentChanged;
/// <summary>
/// Event triggered when a new <see cref="IHierarchyObject"/> is added to the <see cref="Children"/>.
/// </summary>
event ChildrenAddedEventHandler? OnChildrenAdded;
/// <summary>
/// Event triggered when an <see cref="IHierarchyObject"/> is removed from the <see cref="Children"/>.
/// </summary>
event ChildrenRemovedEventHandler? OnChildrenRemoved;
/// <summary>
/// Gets the <see cref="IGameManager"/> this <see cref="IHierarchyObject"/> is connected to, if any.
/// </summary>
IGameManager GameManager { get; }
/// <summary>
/// Indicates whether the <see cref="IHierarchyObject"/> is currently in the hierarchy.
/// </summary>
bool IsInHierarchy { get; }
/// <summary>
/// The parent <see cref="IHierarchyObject"/> of the <see cref="IHierarchyObject"/>.
/// </summary>
IHierarchyObject? Parent { get; }
/// <summary>
/// The <see cref="IHierarchyObject"/>s that have this <see cref="IHierarchyObject"/> as their <see cref="Parent"/>.
/// </summary>
IReadOnlyList<IHierarchyObject> Children { get; }
/// <summary>
/// Internal method to handle entering the hierarchy.
/// This should be called by the system to properly manage hierarchy states.
/// </summary>
/// <param name="gameManager">The <see cref="IGameManager"/> that is managing this hierarchy.</param>
/// <returns>
/// <see cref="true"/> if the <see cref="IHierarchyObject"/> successfully entered the hierarchy;
/// <see cref="false"/> if it failed to do so.
/// </returns>
internal bool EnterHierarchy(IGameManager gameManager);
/// <summary>
/// Internal method to handle exiting the hierarchy.
/// This should be called by the system to properly manage hierarchy states.
/// </summary>
/// <returns>
/// <see cref="true"/> if the <see cref="IHierarchyObject"/> successfully exited the hierarchy;
/// <see cref="false"/> if it failed to do so.
/// </returns>
internal bool ExitHierarchy();
/// <summary>
/// Sets the parent <see cref="IHierarchyObject"/> of this <see cref="IHierarchyObject"/>.
/// </summary>
/// <param name="hierarchyObject">The parent <see cref="IHierarchyObject"/> to set.</param>
void SetParent(IHierarchyObject? hierarchyObject);
/// <summary>
/// Adds a child <see cref="IHierarchyObject"/> to this <see cref="IHierarchyObject"/>.
/// </summary>
/// <param name="hierarchyObject">The child <see cref="IHierarchyObject"/> to add.</param>
void AddChild(IHierarchyObject hierarchyObject);
/// <summary>
/// Removes a child <see cref="IHierarchyObject"/> from this <see cref="IHierarchyObject"/>.
/// </summary>
/// <param name="hierarchyObject">The child <see cref="IHierarchyObject"/> to remove.</param>
void RemoveChild(IHierarchyObject hierarchyObject);
/// <summary>
/// EventHandler delegate for the event triggered when the <see cref="IHierarchyObject"/> enters the hierarchy of a <see cref="IGameManager">.
/// </summary>
/// <param name="sender">The <see cref="IHierarchyObject"/> that entered the hierarchy.</param>
/// <param name="gameManager">The <see cref="IGameManager"/> that the <see cref="IHierarchyObject"/> has entered it's hierarchy.</param>
delegate void EnteredHierarchyEventHandler(IHierarchyObject sender, IGameManager gameManager);
/// <summary>
/// EventHandler delegate for the event triggered when the <see cref="IHierarchyObject"/> exits the hierarchy of a <see cref="IGameManager">.
/// </summary>
/// <param name="sender">The <see cref="IHierarchyObject"/> that exited the hierarchy.</param>
/// <param name="gameManager">The <see cref="IGameManager"/> that the <see cref="IHierarchyObject"/> has exited it's hierarchy.</param>
delegate void ExitedHierarchyEventHandler(IHierarchyObject sender, IGameManager gameManager);
/// <summary>
/// Delegate for the event triggered when the <see cref="IHierarchyObject"/>'s parent changes.
/// </summary>
/// <param name="sender">The <see cref="IHierarchyObject"/> that the parent has changed.</param>
/// <param name="previousParent">The previous <see cref="IHierarchyObject"/> the sender was a child of.</param>
/// <param name="newParent">The new and current <see cref="IHierarchyObject"/> the sender is a child of.</param>
delegate void ParentChangedEventHandler(IHierarchyObject sender, IHierarchyObject? previousParent, IHierarchyObject? newParent);
/// <summary>
/// Delegate for the event triggered when a new <see cref="IHierarchyObject"/> added as a child.
/// </summary>
/// <param name="sender">The parent <see cref="IHierarchyObject"/> this event is being called from.</param>
/// <param name="childrenAdded">The <see cref="IHierarchyObject"/> that got removed as a children of the sender <see cref="IHierarchyObject"/>.</param>
delegate void ChildrenAddedEventHandler(IHierarchyObject sender, IHierarchyObject childrenAdded);
/// <summary>
/// Delegate for the event triggered when a new <see cref="IHierarchyObject"/> removed from being a child.
/// </summary>
/// <param name="sender">The parent <see cref="IHierarchyObject"/> this event is being called from.</param>
/// <param name="childrenAdded">The <see cref="IHierarchyObject"/> that got removed as a children of the sender <see cref="IHierarchyObject"/>.</param>
delegate void ChildrenRemovedEventHandler(IHierarchyObject sender, IHierarchyObject childrenRemoved);
}

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Engine.Core/Abstract/IUniverse.cs Normal file
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using System.Collections.Generic;
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents a universe responsible for managing <see cref="IUniverseObject"/>s.
/// </summary>
public interface IUniverse : IEntity, IEnumerable<IUniverseObject>
{
/// <summary>
/// Event triggered when <see cref="Update(UniverseTime)"/> is about to be called called on the <see cref="IUniverse"/>.
/// </summary>
event UpdateEventHandler? OnPreUpdate;
/// <summary>
/// Event triggered when <see cref="Update(UniverseTime)"/> is called on the <see cref="IUniverse"/>.
/// </summary>
event UpdateEventHandler? OnUpdate;
/// <summary>
/// Event triggered when <see cref="PreDraw"/> is called on the <see cref="IUniverse"/>.
/// </summary>
event PreDrawEventHandler? OnPreDraw;
/// <summary>
/// Event triggered when a <see cref="IUniverseObject"/> is registered to the <see cref="IUniverse"/>.
/// </summary>
event UniverseObjectRegisteredEventHandler? OnUniverseObjectRegistered;
/// <summary>
/// Event triggered when a <see cref="IUniverseObject"/> is unregistered from the <see cref="IUniverse"/>.
/// </summary>
event UniverseObjectUnRegisteredEventHandler? OnUniverseObjectUnRegistered;
/// <summary>
/// Current time scale the <see cref="IUniverse"/> operates on.
/// </summary>
float TimeScale { get; set; }
/// <summary>
/// Contains time data related to this <see cref="IUniverse"/>.
/// </summary>
UniverseTime Time { get; }
/// <summary>
/// Contains unscaled time data related to this <see cref="IUniverse"/>.
/// </summary>
UniverseTime UnscaledTime { get; }
/// <summary>
/// Gets a read-only list of <see cref="IUniverseObject"/>s managed by the <see cref="IUniverse"/>.
/// </summary>
IReadOnlyList<IUniverseObject> UniverseObjects { get; }
/// <summary>
/// Registers an <see cref="IUniverseObject"/> to the <see cref="IUniverse"/>.
/// </summary>
/// <param name="universeObject">The <see cref="IUniverseObject"/> to register.</param>
void Register(IUniverseObject universeObject);
/// <summary>
/// Instantiates a <see cref="IUniverseObject"/> of type T with the given arguments and registers it to the <see cref="IUniverse"/>.
/// </summary>
/// <typeparam name="T">The type of <see cref="IUniverseObject"/> to instantiate.</typeparam>
/// <param name="args">Constructor parameters for the given type of <see cref="IUniverseObject"/>.</param>
/// <returns>The instantiated <see cref="IUniverseObject"/>.</returns>
T InstantiateUniverseObject<T>(params object?[]? args) where T : class, IUniverseObject;
/// <summary>
/// Removes an <see cref="IUniverseObject"/> from the <see cref="IUniverse"/>.
/// </summary>
/// <param name="universeObject">The <see cref="IUniverseObject"/> to remove.</param>
void Remove(IUniverseObject universeObject);
/// <summary>
/// Updates the <see cref="IUniverse"/> with the given delta time.
/// </summary>
/// <param name="universeTime">Delta time.</param>
void Update(UniverseTime universeTime);
/// <summary>
/// Performs operations that should be done before the draw calls.
/// </summary>
void PreDraw();
delegate void UpdateEventHandler(IUniverse sender, UniverseTime engineTime);
delegate void PreDrawEventHandler(IUniverse sender);
delegate void UniverseObjectRegisteredEventHandler(IUniverse sender, IUniverseObject universeObjectRegistered);
delegate void UniverseObjectUnRegisteredEventHandler(IUniverse sender, IUniverseObject universeObjectUnregistered);
}

131
Engine.Core/Abstract/IUniverseObject.cs Normal file
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@@ -0,0 +1,131 @@
using System.Collections.Generic;
namespace Syntriax.Engine.Core.Abstract;
/// <summary>
/// Represents an <see cref="IEntity"/> that can enter and exit a universe within the <see cref="IUniverse"/> system.
/// This interface allows for tracking the object's presence in the universe and provides events
/// for notifying when the see enters or exits the universe.
/// </summary>
public interface IUniverseObject : IEntity, IActive, INameable, IHasBehaviourController, IEnumerable<IUniverseObject>
{
/// <summary>
/// Event triggered when the <see cref="IUniverseObject"/> enters the universe.
/// </summary>
event EnteredUniverseEventHandler? OnEnteredUniverse;
/// <summary>
/// Event triggered when the <see cref="IUniverseObject"/> exits the universe.
/// </summary>
event ExitedUniverseEventHandler? OnExitedUniverse;
/// <summary>
/// Event triggered when the <see cref="Parent"/> of the <see cref="IUniverseObject"/> changes. The second parameter is the old <see cref="IUniverseObject"/>.
/// </summary>
event ParentChangedEventHandler? OnParentChanged;
/// <summary>
/// Event triggered when a new <see cref="IUniverseObject"/> is added to the <see cref="Children"/>.
/// </summary>
event ChildrenAddedEventHandler? OnChildrenAdded;
/// <summary>
/// Event triggered when an <see cref="IUniverseObject"/> is removed from the <see cref="Children"/>.
/// </summary>
event ChildrenRemovedEventHandler? OnChildrenRemoved;
/// <summary>
/// Gets the <see cref="IUniverse"/> this <see cref="IUniverseObject"/> is connected to, if any.
/// </summary>
IUniverse Universe { get; }
/// <summary>
/// Indicates whether the <see cref="IUniverseObject"/> is currently in the universe.
/// </summary>
bool IsInUniverse { get; }
/// <summary>
/// The parent <see cref="IUniverseObject"/> of the <see cref="IUniverseObject"/>.
/// </summary>
IUniverseObject? Parent { get; }
/// <summary>
/// The <see cref="IUniverseObject"/>s that have this <see cref="IUniverseObject"/> as their <see cref="Parent"/>.
/// </summary>
IReadOnlyList<IUniverseObject> Children { get; }
/// <summary>
/// Internal method to handle entering the universe.
/// This should be called by the system to properly manage universe states.
/// </summary>
/// <param name="universe">The <see cref="IUniverse"/> that is managing this universe.</param>
/// <returns>
/// <see cref="true"/> if the <see cref="IUniverseObject"/> successfully entered the universe;
/// <see cref="false"/> if it failed to do so.
/// </returns>
internal bool EnterUniverse(IUniverse universe);
/// <summary>
/// Internal method to handle exiting the universe.
/// This should be called by the system to properly manage universe states.
/// </summary>
/// <returns>
/// <see cref="true"/> if the <see cref="IUniverseObject"/> successfully exited the universe;
/// <see cref="false"/> if it failed to do so.
/// </returns>
internal bool ExitUniverse();
/// <summary>
/// Sets the parent <see cref="IUniverseObject"/> of this <see cref="IUniverseObject"/>.
/// </summary>
/// <param name="universeObject">The parent <see cref="IUniverseObject"/> to set.</param>
void SetParent(IUniverseObject? universeObject);
/// <summary>
/// Adds a child <see cref="IUniverseObject"/> to this <see cref="IUniverseObject"/>.
/// </summary>
/// <param name="universeObject">The child <see cref="IUniverseObject"/> to add.</param>
void AddChild(IUniverseObject universeObject);
/// <summary>
/// Removes a child <see cref="IUniverseObject"/> from this <see cref="IUniverseObject"/>.
/// </summary>
/// <param name="universeObject">The child <see cref="IUniverseObject"/> to remove.</param>
void RemoveChild(IUniverseObject universeObject);
/// <summary>
/// EventHandler delegate for the event triggered when the <see cref="IUniverseObject"/> enters the universe of a <see cref="IUniverse">.
/// </summary>
/// <param name="sender">The <see cref="IUniverseObject"/> that entered the universe.</param>
/// <param name="universe">The <see cref="IUniverse"/> that the <see cref="IUniverseObject"/> has entered it's universe.</param>
delegate void EnteredUniverseEventHandler(IUniverseObject sender, IUniverse universe);
/// <summary>
/// EventHandler delegate for the event triggered when the <see cref="IUniverseObject"/> exits the universe of a <see cref="IUniverse">.
/// </summary>
/// <param name="sender">The <see cref="IUniverseObject"/> that exited the universe.</param>
/// <param name="universe">The <see cref="IUniverse"/> that the <see cref="IUniverseObject"/> has exited it's universe.</param>
delegate void ExitedUniverseEventHandler(IUniverseObject sender, IUniverse universe);
/// <summary>
/// Delegate for the event triggered when the <see cref="IUniverseObject"/>'s parent changes.
/// </summary>
/// <param name="sender">The <see cref="IUniverseObject"/> that the parent has changed.</param>
/// <param name="previousParent">The previous <see cref="IUniverseObject"/> the sender was a child of.</param>
/// <param name="newParent">The new and current <see cref="IUniverseObject"/> the sender is a child of.</param>
delegate void ParentChangedEventHandler(IUniverseObject sender, IUniverseObject? previousParent, IUniverseObject? newParent);
/// <summary>
/// Delegate for the event triggered when a new <see cref="IUniverseObject"/> added as a child.
/// </summary>
/// <param name="sender">The parent <see cref="IUniverseObject"/> this event is being called from.</param>
/// <param name="childrenAdded">The <see cref="IUniverseObject"/> that got removed as a children of the sender <see cref="IUniverseObject"/>.</param>
delegate void ChildrenAddedEventHandler(IUniverseObject sender, IUniverseObject childrenAdded);
/// <summary>
/// Delegate for the event triggered when a new <see cref="IUniverseObject"/> removed from being a child.
/// </summary>
/// <param name="sender">The parent <see cref="IUniverseObject"/> this event is being called from.</param>
/// <param name="childrenAdded">The <see cref="IUniverseObject"/> that got removed as a children of the sender <see cref="IUniverseObject"/>.</param>
delegate void ChildrenRemovedEventHandler(IUniverseObject sender, IUniverseObject childrenRemoved);
}