// Copyright (C) 2012 Jérôme Leclercq
// This file is part of the "Nazara Engine - Utility module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_KEYFRAMEMESH_HPP
#define NAZARA_KEYFRAMEMESH_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Utility/Mesh.hpp>
#include <Nazara/Utility/SubMesh.hpp>

struct NzKeyframeMeshImpl;

class NAZARA_API NzKeyframeMesh final : public NzSubMesh
{
	friend NzMesh;

	public:
		NzKeyframeMesh(const NzMesh* parent);
		virtual ~NzKeyframeMesh();

		bool Create(NzVertexBuffer* vertexBuffer, unsigned int frameCount);
		void Destroy();

		void Finish();

		const NzAxisAlignedBox& GetAABB() const override;
		nzAnimationType GetAnimationType() const override;
		unsigned int GetFrameCount() const;
		const NzIndexBuffer* GetIndexBuffer() const override;
		NzVector3f GetNormal(unsigned int frameIndex, unsigned int vertexIndex) const;
		NzVector3f GetPosition(unsigned int frameIndex, unsigned int vertexIndex) const;
		NzVector3f GetTangent(unsigned int frameIndex, unsigned int vertexIndex) const;
		NzVector2f GetTexCoords(unsigned int vertexIndex) const;
		void GetVertex(unsigned int frameIndex, unsigned int vertexIndex, NzMeshVertex* dest) const;

		NzVertexBuffer* GetVertexBuffer() override;
		const NzVertexBuffer* GetVertexBuffer() const override;

		void Interpolate(const NzAnimation* animation, unsigned int frameA, unsigned int frameB, float interpolation) const;

		bool IsAnimated() const override;
		bool IsValid();

		void SetAABB(unsigned int frameIndex, const NzAxisAlignedBox& aabb);
		void SetIndexBuffer(const NzIndexBuffer* indexBuffer);
		void SetNormal(unsigned int frameIndex, unsigned int vertexIndex, const NzVector3f& normal);
		void SetPosition(unsigned int frameIndex, unsigned int vertexIndex, const NzVector3f& position);
		void SetTangent(unsigned int frameIndex, unsigned int vertexIndex, const NzVector3f& tangent);
		void SetTexCoords(unsigned int vertexIndex, const NzVector2f& texCoords);

	private:
		void InterpolateImpl(unsigned int frameA, unsigned int frameB, float interpolation) const;

		NzKeyframeMeshImpl* m_impl = nullptr;
};

#endif // NAZARA_KEYFRAMEMESH_HPP