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Source/Engine/Particles/ParticleManager.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Compiler.h"
+
+struct RenderContext;
+struct RenderView;
+class ParticleEmitter;
+class ParticleSystemInstance;
+class ParticleEffect;
+class ParticleSystem;
+class ParticleBuffer;
+class SceneRenderTask;
+class Actor;
+
+/// <summary>
+/// The particles service used for simulation and emitters data pooling.
+/// </summary>
+class FLAXENGINE_API ParticleManager
+{
+public:
+
+    /// <summary>
+    /// Updates the effect during next particles simulation tick.
+    /// </summary>
+    /// <param name="effect">The effect.</param>
+    static void UpdateEffect(ParticleEffect* effect);
+
+    /// <summary>
+    /// Called when effect gets removed from gameplay. All references to it should be cleared.
+    /// </summary>
+    /// <param name="effect">The effect.</param>
+    static void OnEffectDestroy(ParticleEffect* effect);
+
+public:
+
+    /// <summary>
+    /// Draws the particles.
+    /// </summary>
+    /// <param name="renderContext">The rendering context.</param>
+    /// <param name="effect">The owning actor.</param>
+    static void DrawParticles(RenderContext& renderContext, ParticleEffect* effect);
+
+public:
+
+    /// <summary>
+    /// Enables or disables particle buffer pooling.
+    /// </summary>
+    static bool EnableParticleBufferPooling;
+
+    /// <summary>
+    /// The particle buffer recycle timeout (in seconds).
+    /// </summary>
+    static float ParticleBufferRecycleTimeout;
+
+    /// <summary>
+    /// Acquires the free particle buffer for the emitter instance data.
+    /// </summary>
+    /// <param name="emitter">The emitter.</param>
+    /// <returns>The particle buffer.</returns>
+    static ParticleBuffer* AcquireParticleBuffer(ParticleEmitter* emitter);
+
+    /// <summary>
+    /// Recycles the used particle buffer.
+    /// </summary>
+    /// <param name="buffer">The particle buffer.</param>
+    static void RecycleParticleBuffer(ParticleBuffer* buffer);
+
+    /// <summary>
+    /// Called when emitter gets unloaded. Particle buffers using this emitter has to be cleared.
+    /// </summary>
+    /// <param name="emitter">The emitter.</param>
+    static void OnEmitterUnload(ParticleEmitter* emitter);
+};