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Source/Engine/Graphics/Models/SkinnedMeshDrawData.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Common.h"
+#include "Engine/Graphics/GPUBuffer.h"
+
+/// <summary>
+/// Data storage for the skinned meshes rendering
+/// </summary>
+class FLAXENGINE_API SkinnedMeshDrawData
+{
+private:
+
+    bool _hasValidData = false;
+    bool _isDirty = false;
+
+public:
+
+    /// <summary>
+    /// The bones count.
+    /// </summary>
+    int32 BonesCount = 0;
+
+    /// <summary>
+    /// The bone matrices buffer. Contains prepared skeletal bones transformations (stored as 4x3, 3 Vector4 behind each other).
+    /// </summary>
+    GPUBuffer* BoneMatrices = nullptr;
+
+    /// <summary>
+    /// The bone matrices buffer used during the previous update. Used by per-bone motion blur.
+    /// </summary>
+    GPUBuffer* PrevBoneMatrices = nullptr;
+
+    /// <summary>
+    /// The CPU data buffer with the bones transformations (ready to be flushed with the GPU).
+    /// </summary>
+    Array<byte> Data;
+
+public:
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SkinnedMeshDrawData"/> class.
+    /// </summary>
+    SkinnedMeshDrawData()
+    {
+    }
+
+    /// <summary>
+    /// Finalizes an instance of the <see cref="SkinnedMeshDrawData"/> class.
+    /// </summary>
+    ~SkinnedMeshDrawData();
+
+public:
+
+    /// <summary>
+    /// Determines whether this instance is ready for rendering.
+    /// </summary>
+    /// <returns>True if has valid data and can be rendered, otherwise false.</returns>
+    FORCE_INLINE bool IsReady() const
+    {
+        return BoneMatrices != nullptr && BoneMatrices->IsAllocated();
+    }
+
+    /// <summary>
+    /// Setups the data container for the specified bones amount.
+    /// </summary>
+    /// <param name="bonesCount">The bones count.</param>
+    void Setup(int32 bonesCount);
+
+    /// <summary>
+    /// Sets the bone matrices data for the GPU buffer. Ensure to call Flush before rendering.
+    /// </summary>
+    /// <param name="bones">The bones data.</param>
+    /// <param name="dropHistory">True if drop previous update bones used for motion blur, otherwise will keep them and do the update.</param>
+    void SetData(const Matrix* bones, bool dropHistory);
+
+    /// <summary>
+    /// Flushes the bones data buffer with the GPU by sending the data fro the CPU.
+    /// </summary>
+    /// <param name="context">The GPU context.</param>
+    void Flush(class GPUContext* context);
+};