34 lines
1.1 KiB
C#
34 lines
1.1 KiB
C#
using System.Collections.Generic;
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using Engine.Core;
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namespace Engine.Systems.Graphics;
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public class TriangleBatcher : Behaviour, IFirstFrameUpdate, IDraw
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{
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private static Comparer<int> SortByAscendingPriority() => Comparer<int>.Create((x, y) => x.CompareTo(y));
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private static System.Func<IBehaviour, int> GetPriority() => (b) => b.Priority;
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private ITriangleBatch triangleBatch = null!;
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private ICamera camera = null!;
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private readonly ActiveBehaviourCollectorOrdered<int, IDrawableTriangle> drawableShapes = new(GetPriority(), SortByAscendingPriority());
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public void FirstActiveFrame()
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{
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camera = Universe.FindRequiredBehaviour<ICamera>();
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triangleBatch = Universe.FindRequiredBehaviour<ITriangleBatch>();
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drawableShapes.Unassign();
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drawableShapes.Assign(Universe);
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}
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public void Draw()
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{
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triangleBatch.Begin(camera.ViewMatrix, camera.ProjectionMatrix);
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for (int i = 0; i < drawableShapes.Count; i++)
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drawableShapes[i].Draw(triangleBatch);
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triangleBatch.End();
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}
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}
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