Syntriax.Engine/Engine.Core/Behaviour.cs

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using Syntriax.Engine.Core.Abstract;
namespace Syntriax.Engine.Core;
public abstract class Behaviour : BehaviourBase
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{
private bool isInitializedThisFrame = false;
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protected IGameObject GameObject => BehaviourController.GameObject;
protected ITransform Transform => BehaviourController.GameObject.Transform;
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public Behaviour()
{
OnInitialized += OnInitialize;
OnFinalized += OnFinalize;
OnUnassigned += OnUnassign;
}
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protected virtual void OnUnassign() { }
private void OnUnassign(IAssignable assignable) => OnUnassign();
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protected virtual void OnInitialize() { }
private void OnInitialize(IInitialize _)
{
isInitializedThisFrame = true;
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BehaviourController.OnPreUpdate += PreUpdate;
BehaviourController.OnPreDraw += PreDraw;
BehaviourController.OnUpdate += Update;
BehaviourController.GameObject.OnEnteredHierarchy += EnteredHierarchy;
BehaviourController.GameObject.OnExitedHierarchy += ExitedHierarchy;
OnInitialize();
if (GameObject.IsInHierarchy)
EnteredHierarchy(GameObject);
}
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protected virtual void OnFinalize() { }
private void OnFinalize(IInitialize _)
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{
BehaviourController.OnPreUpdate -= PreUpdate;
BehaviourController.OnPreDraw -= PreDraw;
BehaviourController.OnUpdate -= Update;
BehaviourController.GameObject.OnEnteredHierarchy -= EnteredHierarchy;
BehaviourController.GameObject.OnExitedHierarchy -= ExitedHierarchy;
OnFinalize();
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}
protected virtual void OnPreUpdatePreActiveCheck() { }
protected virtual void OnPreUpdate() { }
private void PreUpdate(IBehaviourController _)
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{
OnPreUpdatePreActiveCheck();
if (!IsActive)
return;
if (isInitializedThisFrame)
FirstActiveFrame();
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OnPreUpdate();
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}
protected virtual void OnFirstActiveFrame() { }
private void FirstActiveFrame()
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{
OnFirstActiveFrame();
isInitializedThisFrame = false;
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}
protected virtual void OnUpdatePreActiveCheck() { }
protected virtual void OnUpdate() { }
private void Update(IBehaviourController _)
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{
OnUpdatePreActiveCheck();
if (!IsActive)
return;
OnUpdate();
}
protected virtual void OnPreDrawPreActiveCheck() { }
protected virtual void OnPreDraw() { }
private void PreDraw(IBehaviourController _)
{
OnPreDrawPreActiveCheck();
if (!StateEnable.Enabled)
return;
OnPreDraw();
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}
protected virtual void OnEnteredHierarchy() { }
private void EnteredHierarchy(IHierarchyObject sender) => OnEnteredHierarchy();
protected virtual void OnExitedHierarchy() { }
private void ExitedHierarchy(IHierarchyObject sender) => OnExitedHierarchy();
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}