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using System;
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using System.Collections.Generic;
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namespace Encompass
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{
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internal class RenderManager
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{
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private readonly EntityManager _entityManager;
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private readonly DrawLayerManager _drawLayerManager;
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private readonly Dictionary<Type, Action<Entity>> _drawComponentTypeToOrderedRenderer = new Dictionary<Type, Action<Entity>>(256);
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public RenderManager(EntityManager entityManager, DrawLayerManager drawLayerManager)
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{
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_entityManager = entityManager;
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_drawLayerManager = drawLayerManager;
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}
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public void RegisterOrderedRenderer<TComponent>(Action<Entity> renderAction) where TComponent : struct
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{
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_drawComponentTypeToOrderedRenderer.Add(typeof(TComponent), renderAction);
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_drawLayerManager.RegisterOrderedDrawable<TComponent>();
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}
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public void RegisterGeneralRendererWithLayer(GeneralRenderer renderer, int layer)
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{
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_drawLayerManager.RegisterGeneralRendererWithLayer(renderer, layer);
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}
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public void Draw()
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{
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foreach (var layer in _drawLayerManager.LayerOrder)
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{
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var generalRendererSet = _drawLayerManager.GeneralRenderersByLayer(layer);
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foreach (var (entityID, componentType) in _drawLayerManager.AllInLayer(layer))
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{
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if (_drawComponentTypeToOrderedRenderer.ContainsKey(componentType))
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{
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var internalRenderAction = _drawComponentTypeToOrderedRenderer[componentType];
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internalRenderAction(_entityManager.GetEntity(entityID));
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}
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}
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foreach (var generalRenderer in generalRendererSet)
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{
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generalRenderer.Render();
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}
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}
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}
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}
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}
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