Syntriax
988a6f67f2
Original Behaviour was using old methods for detecting entering/exiting universe, they are now all under the same hood and the original is kept for UniverseEntranceManager because it needs to enter the universe without itself. The internal behaviour kept under a subnamespace of "Core.Internal" for the purpose that it might come in handy for other use cases.
55 lines
1.9 KiB
C#
55 lines
1.9 KiB
C#
using System.Collections.Generic;
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namespace Engine.Core;
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public class DrawManager : Behaviour, IEnterUniverse, IExitUniverse
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{
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// We use Descending order because draw calls are running from last to first
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private static Comparer<int> SortByDescendingPriority() => Comparer<int>.Create((x, y) => y.CompareTo(x));
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private static System.Func<IBehaviour, int> GetPriority() => (b) => b.Priority;
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private readonly ActiveBehaviourCollectorOrdered<int, IPreDraw> preDrawEntities = new(GetPriority(), SortByDescendingPriority());
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private readonly ActiveBehaviourCollectorOrdered<int, IDraw> drawEntities = new(GetPriority(), SortByDescendingPriority());
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private readonly ActiveBehaviourCollectorOrdered<int, IPostDraw> postDrawEntities = new(GetPriority(), SortByDescendingPriority());
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private void OnPreDraw(IUniverse sender)
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{
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for (int i = preDrawEntities.Count - 1; i >= 0; i--)
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preDrawEntities[i].PreDraw();
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}
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private void OnDraw(IUniverse sender)
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{
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for (int i = drawEntities.Count - 1; i >= 0; i--)
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drawEntities[i].Draw();
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}
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private void OnPostDraw(IUniverse sender)
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{
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for (int i = postDrawEntities.Count - 1; i >= 0; i--)
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postDrawEntities[i].PostDraw();
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}
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public void EnterUniverse(IUniverse universe)
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{
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preDrawEntities.Assign(universe);
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drawEntities.Assign(universe);
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postDrawEntities.Assign(universe);
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universe.OnPreDraw.AddListener(OnPreDraw);
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universe.OnDraw.AddListener(OnDraw);
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universe.OnPostDraw.AddListener(OnPostDraw);
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}
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public void ExitUniverse(IUniverse universe)
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{
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preDrawEntities.Unassign();
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drawEntities.Unassign();
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postDrawEntities.Unassign();
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universe.OnPreDraw.RemoveListener(OnPreDraw);
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universe.OnDraw.RemoveListener(OnDraw);
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universe.OnPostDraw.RemoveListener(OnPostDraw);
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}
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}
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