#pragma once

struct Tri;

class MeshExploder
{
	LPDIRECT3DDEVICE9 device;

	LPD3DXMESH originalMesh;
	D3DXMATERIAL* originalMaterials;
	D3DXEFFECTINSTANCE* originalShaders;

	wchar_t** materialNames;

	unsigned int nPieces;
	LPD3DXMESH* fragmentMeshes;
	DWORD* fragmentAttribIndices;

public:
	LPD3DXMESH composedMesh;
	D3DXMATERIAL* composedMaterials;
	D3DXEFFECTINSTANCE* composedShaders;

	wchar_t** composedMaterialNames;

	MeshExploder(LPDIRECT3DDEVICE9 device,
		LPD3DXMESH originalMesh,
		D3DXMATERIAL* originalMaterials,
		wchar_t** materialNames,
		D3DXEFFECTINSTANCE* originalShaders,
		unsigned int nPieces);
	~MeshExploder(void);

	//create #nPieces partial meshes
	//attributes are kept for every face
	void explode();

	//generate atlas for all fragment meshes
	//attributes are kept
	void generateAtlas(int atlasSize);

	//combine all fragment meshes into one
	//attributes are (original x fragmentIndex)
	//new material buffer
	void merge();

	void saveFragMeshes();
	void saveComposedMesh(LPCSTR name);

	void saveComposedMeshToOgreXML(LPCSTR name);

	static void clusterTrisKMeans(Tri* triArray, int nTris, int nClusters, int* clusterLenghts);
};