140 lines
3.3 KiB
C++
140 lines
3.3 KiB
C++
// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
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#pragma once
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#include "Engine/Core/Types/String.h"
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#include "Engine/Core/Types/Pair.h"
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#include "Engine/Core/Collections/Array.h"
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#include "Engine/Core/Collections/Dictionary.h"
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#include "Engine/Core/Math/Vector3.h"
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#include "Engine/Graphics/DynamicBuffer.h"
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class SkinnedMesh;
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class SkinnedModel;
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class GPUBuffer;
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/// <summary>
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/// The blend shape vertex data optimized for runtime meshes morphing.
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/// </summary>
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struct BlendShapeVertex
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{
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/// <summary>
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/// The position offset.
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/// </summary>
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Vector3 PositionDelta;
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/// <summary>
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/// The normal vector offset (tangent Z).
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/// </summary>
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Vector3 NormalDelta;
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/// <summary>
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/// The index of the vertex in the mesh to blend.
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/// </summary>
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uint32 VertexIndex;
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};
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template<>
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struct TIsPODType<BlendShapeVertex>
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{
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enum { Value = true };
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};
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/// <summary>
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/// Data container for the blend shape.
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/// </summary>
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class BlendShape
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{
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public:
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/// <summary>
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/// The name of the blend shape.
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/// </summary>
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String Name;
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/// <summary>
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/// The weight of the blend shape.
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/// </summary>
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float Weight;
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/// <summary>
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/// True if blend shape contains deltas for normal vectors of the mesh, otherwise calculations related to tangent space can be skipped.
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/// </summary>
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bool UseNormals;
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/// <summary>
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/// The minimum index of the vertex in all blend shape vertices. Used to optimize blend shapes updating.
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/// </summary>
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uint32 MinVertexIndex;
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/// <summary>
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/// The maximum index of the vertex in all blend shape vertices. Used to optimize blend shapes updating.
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/// </summary>
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uint32 MaxVertexIndex;
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/// <summary>
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/// The list of shape vertices.
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/// </summary>
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Array<BlendShapeVertex> Vertices;
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};
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/// <summary>
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/// The blend shapes runtime instance data. Handles blend shapes updating, blending and preparing for skinned mesh rendering.
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/// </summary>
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class BlendShapesInstance
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{
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public:
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/// <summary>
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/// The runtime data for blend shapes used for on a mesh.
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/// </summary>
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class MeshInstance
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{
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public:
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bool IsUsed;
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bool IsDirty;
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uint32 DirtyMinVertexIndex;
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uint32 DirtyMaxVertexIndex;
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DynamicVertexBuffer VertexBuffer;
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MeshInstance();
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~MeshInstance();
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};
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public:
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/// <summary>
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/// The blend shapes weights (pair of blend shape name and the weight).
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/// </summary>
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Array<Pair<String, float>> Weights;
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/// <summary>
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/// Flag that marks if blend shapes weights has been modified.
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/// </summary>
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bool WeightsDirty = false;
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/// <summary>
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/// The blend shapes meshes data.
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/// </summary>
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Dictionary<SkinnedMesh*, MeshInstance*> Meshes;
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public:
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/// <summary>
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/// Finalizes an instance of the <see cref="BlendShapesInstance"/> class.
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/// </summary>
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~BlendShapesInstance();
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/// <summary>
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/// Updates the instanced meshes. Performs the blend shapes blending (only if weights were modified).
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/// </summary>
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/// <param name="skinnedModel">The skinned model used for blend shapes.</param>
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void Update(SkinnedModel* skinnedModel);
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/// <summary>
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/// Clears the runtime data.
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/// </summary>
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void Clear();
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};
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