/****************************************************************************
* VCGLib                                                            o o     *
* Visual and Computer Graphics Library                            o     o   *
*                                                                _   O  _   *
* Copyright(C) 2004                                                \/)\/    *
* Visual Computing Lab                                            /\/|      *
* ISTI - Italian National Research Council                           |      *
*                                                                    \      *
* All rights reserved.                                                      *
*                                                                           *
* This program is free software; you can redistribute it and/or modify      *
* it under the terms of the GNU General Public License as published by      *
* the Free Software Foundation; either version 2 of the License, or         *
* (at your option) any later version.                                       *
*                                                                           *
* This program is distributed in the hope that it will be useful,           *
* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
* for more details.                                                         *
*                                                                           *
****************************************************************************/
#ifndef __VCGLIB_IMPORTERPLY
#define __VCGLIB_IMPORTERPLY

#include <stddef.h>
#include<wrap/callback.h>
#include<wrap/ply/plylib.h>
#include<wrap/io_trimesh/io_mask.h>
#include<wrap/io_trimesh/io_ply.h>
#include<vcg/complex/algorithms/create/platonic.h>

namespace vcg {
namespace tri {
namespace io {

template <class TYPE>
int PlyType ()  { return 0;}


// 10/6/05 Cignoni this specialization must be inlined becouse otherwise if we include this
// .h in two different cpp we should get a double definition error during linking

template <> inline int PlyType <float >()  { return ply::T_FLOAT; }
template <> inline int PlyType <double>()  { return ply::T_DOUBLE; }
template <> inline int PlyType <int   >()  { return ply::T_INT; }
template <> inline int PlyType <short >()  { return ply::T_SHORT; }
template <> inline int PlyType <unsigned char >()  { return ply::T_UCHAR; }

/**
This class encapsulate a filter for opening ply meshes.
The ply file format is quite extensible...
*/
template <class OpenMeshType>
class ImporterPLY
{
public:

typedef ::vcg::ply::PropDescriptor PropDescriptor ;
typedef typename OpenMeshType::VertexPointer VertexPointer;
typedef typename OpenMeshType::ScalarType ScalarType;
typedef typename OpenMeshType::VertexType VertexType;
typedef typename OpenMeshType::FaceType FaceType;
typedef typename OpenMeshType::VertexIterator VertexIterator;
typedef typename OpenMeshType::FaceIterator FaceIterator;
typedef typename OpenMeshType::EdgeIterator EdgeIterator;

#define MAX_USER_DATA 256
// Auxiliary structure for reading ply files
struct LoadPly_FaceAux
{
	unsigned char size;
	int v[512];
	int flags;
	float q;
	float texcoord[32];
	unsigned char ntexcoord;
	int texcoordind;
	float colors[32];
	unsigned char ncolors;

	unsigned char r;
	unsigned char g;
	unsigned char b;

	unsigned char data[MAX_USER_DATA];
};

struct LoadPly_TristripAux
{
	int size;
	int *v;
	unsigned char data[MAX_USER_DATA];
};

struct LoadPly_EdgeAux
{
	int v1,v2;
	unsigned char data[MAX_USER_DATA];
};

// Yet another auxiliary data structure for loading some strange ply files
// the original stanford range data...
struct LoadPly_RangeGridAux {
	unsigned char num_pts;
	int pts[5];
};


// Auxiliary structure to load vertex data
template<class S>
struct LoadPly_VertAux
{
	S p[3];
	S n[3];
	int flags;
	float q; // the confidence
	float intensity;
	unsigned char r;
	unsigned char g;
	unsigned char b;
	unsigned char data[MAX_USER_DATA];
	float radius;
	float u,v,w;
};

// Auxiliary structure to load the camera
struct LoadPly_Camera
{
	float view_px;
	float view_py;
	float view_pz;
	float x_axisx;
	float x_axisy;
	float x_axisz;
	float y_axisx;
	float y_axisy;
	float y_axisz;
	float z_axisx;
	float z_axisy;
	float z_axisz;
	float focal;
	float scalex;
	float scaley;
	float centerx;
	float centery;
	int   viewportx;
	int   viewporty;
	float k1;
	float k2;
	float k3;
	float k4;
};

#define _VERTDESC_LAST_  29
static const  PropDescriptor &VertDesc(int i)
{
	static const PropDescriptor pv[_VERTDESC_LAST_]={
/*00*/ {"vertex", "x",         ply::T_FLOAT, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,p),0,0,0,0,0  ,0},
/*01*/ {"vertex", "y",         ply::T_FLOAT, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,p) + sizeof(ScalarType),0,0,0,0,0  ,0},
/*02*/ {"vertex", "z",         ply::T_FLOAT, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,p) + 2*sizeof(ScalarType),0,0,0,0,0  ,0},
/*03*/ {"vertex", "flags",     ply::T_INT,   ply::T_INT,           offsetof(LoadPly_VertAux<ScalarType>,flags),0,0,0,0,0  ,0},
/*04*/ {"vertex", "quality",   ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,q),0,0,0,0,0  ,0},
/*05*/ {"vertex", "red"  ,     ply::T_UCHAR, ply::T_UCHAR,         offsetof(LoadPly_VertAux<ScalarType>,r),0,0,0,0,0  ,0},
/*06*/ {"vertex", "green",     ply::T_UCHAR, ply::T_UCHAR,         offsetof(LoadPly_VertAux<ScalarType>,g),0,0,0,0,0  ,0},
/*07*/ {"vertex", "blue" ,     ply::T_UCHAR, ply::T_UCHAR,         offsetof(LoadPly_VertAux<ScalarType>,b),0,0,0,0,0  ,0},
/*08*/ {"vertex", "diffuse_red"  ,     ply::T_UCHAR, ply::T_UCHAR,         offsetof(LoadPly_VertAux<ScalarType>,r),0,0,0,0,0  ,0},
/*09*/ {"vertex", "diffuse_green",     ply::T_UCHAR, ply::T_UCHAR,         offsetof(LoadPly_VertAux<ScalarType>,g),0,0,0,0,0  ,0},
/*10*/ {"vertex", "diffuse_blue" ,     ply::T_UCHAR, ply::T_UCHAR,         offsetof(LoadPly_VertAux<ScalarType>,b),0,0,0,0,0  ,0},
/*11*/ {"vertex", "confidence", ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,q),0,0,0,0,0  ,0},
/*12*/ {"vertex", "nx",         ply::T_FLOAT, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,n)                       ,0,0,0,0,0  ,0},
/*13*/ {"vertex", "ny",         ply::T_FLOAT, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,n) + 1*sizeof(ScalarType),0,0,0,0,0  ,0},
/*14*/ {"vertex", "nz",         ply::T_FLOAT, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,n) + 2*sizeof(ScalarType),0,0,0,0,0  ,0},
/*15*/ {"vertex", "radius",     ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,radius),0,0,0,0,0  ,0},
/*16*/ {"vertex", "texture_u",  ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,u),0,0,0,0,0  ,0},
/*17*/ {"vertex", "texture_v",  ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,v),0,0,0,0,0  ,0},
/*18*/ {"vertex", "texture_w",  ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,w),0,0,0,0,0  ,0},
/*19*/ {"vertex", "intensity",  ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,intensity),0,0,0,0,0  ,0},
/*20*/ {"vertex", "s",    ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,u),0,0,0,0,0  ,0},
/*21*/ {"vertex", "t",    ply::T_FLOAT, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,v),0,0,0,0,0  ,0},
// DOUBLE
/*22*/ {"vertex", "x",         ply::T_DOUBLE, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,p),0,0,0,0,0  ,0},
/*23*/ {"vertex", "y",         ply::T_DOUBLE, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,p) + sizeof(ScalarType)  ,0,0,0,0,0  ,0},
/*24*/ {"vertex", "z",         ply::T_DOUBLE, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,p) + 2*sizeof(ScalarType),0,0,0,0,0  ,0},
/*25*/ {"vertex", "nx",        ply::T_DOUBLE, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,n)                       ,0,0,0,0,0  ,0},
/*26*/ {"vertex", "ny",        ply::T_DOUBLE, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,n) + 1*sizeof(ScalarType),0,0,0,0,0  ,0},
/*27*/ {"vertex", "nz",        ply::T_DOUBLE, PlyType<ScalarType>(),offsetof(LoadPly_VertAux<ScalarType>,n) + 2*sizeof(ScalarType),0,0,0,0,0  ,0},
/*28*/ {"vertex", "radius",    ply::T_DOUBLE, ply::T_FLOAT,         offsetof(LoadPly_VertAux<ScalarType>,radius),0,0,0,0,0  ,0},

	};
	return pv[i];
}

#define _FACEDESC_FIRST_  9 // the first descriptor with possible vertex indices
#define _FACEDESC_LAST_  21
static const  PropDescriptor &FaceDesc(int i)
{
	static const 	PropDescriptor qf[_FACEDESC_LAST_]=
	{
/*      	                           on file       on memory                                                on file       on memory */
/*  0 */	{"face", "vertex_indices", ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_UCHAR, ply::T_UCHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/*  1 */	{"face", "flags",          ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,flags),       0,0,0,0,0  ,0},
/*  2 */	{"face", "quality",        ply::T_FLOAT, ply::T_FLOAT, offsetof(LoadPly_FaceAux,q),           0,0,0,0,0  ,0},
/*  3 */	{"face", "texcoord",       ply::T_FLOAT, ply::T_FLOAT, offsetof(LoadPly_FaceAux,texcoord),    1,0,ply::T_UCHAR, ply::T_UCHAR,offsetof(LoadPly_FaceAux,ntexcoord) ,0},
/*  4 */	{"face", "color",          ply::T_FLOAT, ply::T_FLOAT, offsetof(LoadPly_FaceAux,colors),      1,0,ply::T_UCHAR, ply::T_UCHAR,offsetof(LoadPly_FaceAux,ncolors)   ,0},
/*  5 */	{"face", "texnumber",      ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,texcoordind), 0,0,0,0,0  ,0},
/*  6 */	{"face", "red"  ,          ply::T_UCHAR, ply::T_UCHAR, offsetof(LoadPly_FaceAux,r),           0,0,0,0,0  ,0},
/*  7 */	{"face", "green",          ply::T_UCHAR, ply::T_UCHAR, offsetof(LoadPly_FaceAux,g),           0,0,0,0,0  ,0},
/*  8 */	{"face", "blue" ,          ply::T_UCHAR, ply::T_UCHAR, offsetof(LoadPly_FaceAux,b),           0,0,0,0,0  ,0},
/*  9 */	{"face", "vertex_index",   ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_UCHAR, ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 10 */	{"face", "vertex_index",   ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_CHAR,  ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 11 */	{"face", "vertex_index",   ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_INT,   ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},

/* 12 */	{"face", "vertex_indices", ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_CHAR,  ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 13 */	{"face", "vertex_indices", ply::T_INT,   ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_INT,   ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 14 */	{"face", "vertex_indices", ply::T_UINT,  ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_UCHAR, ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 15 */	{"face", "vertex_indices", ply::T_UINT,  ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_CHAR,  ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 16 */	{"face", "vertex_indices", ply::T_UINT,  ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_INT,   ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 17 */	{"face", "vertex_indices", ply::T_SHORT, ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_CHAR,  ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 18 */	{"face", "vertex_indices", ply::T_SHORT, ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_UCHAR, ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 19 */	{"face", "vertex_indices", ply::T_SHORT, ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_INT,   ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0},
/* 20 */	{"face", "vertex_indices", ply::T_CHAR,  ply::T_INT,   offsetof(LoadPly_FaceAux,v),           1,0,ply::T_UCHAR, ply::T_CHAR,offsetof(LoadPly_FaceAux,size)   ,0}
	};
	return qf[i];
}
static const PropDescriptor &TristripDesc(int i)
{
	static const PropDescriptor qf[1]=
	{
		{"tristrips","vertex_indices", ply::T_INT,  ply::T_INT,  offsetof(LoadPly_TristripAux,v),		  1,1,ply::T_INT,ply::T_INT,offsetof(LoadPly_TristripAux,size) ,0},
	};
	return qf[i];
}

static const PropDescriptor &EdgeDesc(int i)
{
	static const PropDescriptor qf[2]=
	{
		{"edge","vertex1", ply::T_INT,  ply::T_INT,  offsetof(LoadPly_EdgeAux,v1),		  0,0,0,0,0  ,0},
		{"edge","vertex2", ply::T_INT,  ply::T_INT,  offsetof(LoadPly_EdgeAux,v2),		  0,0,0,0,0  ,0},
	};
	return qf[i];
}

// Descriptor for the Stanford Data Repository Range Maps.
// In practice a grid with some invalid elements. Coords are saved only for good elements
static const  PropDescriptor &RangeDesc(int i)
{
	static const PropDescriptor range_props[1] = {
		{"range_grid","vertex_indices", ply::T_INT, ply::T_INT, offsetof(LoadPly_RangeGridAux,pts), 1, 0, ply::T_UCHAR, ply::T_UCHAR, offsetof(LoadPly_RangeGridAux,num_pts),0},
	};
	return range_props[i];
}


static const  PropDescriptor &CameraDesc(int i)
{
	static const PropDescriptor cad[23] =
	{
		{"camera","view_px",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,view_px),0,0,0,0,0  ,0},
		{"camera","view_py",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,view_py),0,0,0,0,0  ,0},
		{"camera","view_pz",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,view_pz),0,0,0,0,0  ,0},
		{"camera","x_axisx",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,x_axisx),0,0,0,0,0  ,0},
		{"camera","x_axisy",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,x_axisy),0,0,0,0,0  ,0},
		{"camera","x_axisz",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,x_axisz),0,0,0,0,0  ,0},
		{"camera","y_axisx",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,y_axisx),0,0,0,0,0  ,0},
		{"camera","y_axisy",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,y_axisy),0,0,0,0,0  ,0},
		{"camera","y_axisz",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,y_axisz),0,0,0,0,0  ,0},
		{"camera","z_axisx",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,z_axisx),0,0,0,0,0  ,0},
		{"camera","z_axisy",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,z_axisy),0,0,0,0,0  ,0},
		{"camera","z_axisz",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,z_axisz),0,0,0,0,0  ,0},
		{"camera","focal"  ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,focal  ),0,0,0,0,0  ,0},
		{"camera","scalex" ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,scalex ),0,0,0,0,0  ,0},
		{"camera","scaley" ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,scaley ),0,0,0,0,0  ,0},
		{"camera","centerx",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,centerx),0,0,0,0,0  ,0},
		{"camera","centery",ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,centery),0,0,0,0,0  ,0},
		{"camera","viewportx",ply::T_INT,ply::T_INT  ,offsetof(LoadPly_Camera,viewportx),0,0,0,0,0  ,0},
		{"camera","viewporty",ply::T_INT,ply::T_INT  ,offsetof(LoadPly_Camera,viewporty),0,0,0,0,0  ,0},
		{"camera","k1"     ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,k1 ),0,0,0,0,0  ,0},
		{"camera","k2"     ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,k2 ),0,0,0,0,0  ,0},
		{"camera","k3"     ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,k3 ),0,0,0,0,0  ,0},
		{"camera","k4"     ,ply::T_FLOAT,ply::T_FLOAT,offsetof(LoadPly_Camera,k4 ),0,0,0,0,0  ,0}
	};
	return cad[i];
}
/// Standard call for knowing the meaning of an error code
static const char *ErrorMsg(int error)
{
	static std::vector<std::string> ply_error_msg;
	if(ply_error_msg.empty())
	{
		ply_error_msg.resize(PlyInfo::E_MAXPLYINFOERRORS );
		ply_error_msg[ply::E_NOERROR				]="No errors";
		ply_error_msg[ply::E_CANTOPEN				]="Can't open file";
		ply_error_msg[ply::E_NOTHEADER ]="Header not found";
		ply_error_msg[ply::E_UNESPECTEDEOF	]="Eof in header";
		ply_error_msg[ply::E_NOFORMAT				]="Format not found";
		ply_error_msg[ply::E_SYNTAX				]="Syntax error on header";
		ply_error_msg[ply::E_PROPOUTOFELEMENT]="Property without element";
		ply_error_msg[ply::E_BADTYPENAME		]="Bad type name";
		ply_error_msg[ply::E_ELEMNOTFOUND		]="Element not found";
		ply_error_msg[ply::E_PROPNOTFOUND		]="Property not found";
		ply_error_msg[ply::E_BADTYPE				]="Bad type on addtoread";
		ply_error_msg[ply::E_INCOMPATIBLETYPE]="Incompatible type";
		ply_error_msg[ply::E_BADCAST				]="Bad cast";

		ply_error_msg[PlyInfo::E_NO_VERTEX      ]="No vertex field found";
		ply_error_msg[PlyInfo::E_NO_FACE        ]="No face field found";
		ply_error_msg[PlyInfo::E_SHORTFILE      ]="Unespected eof";
		ply_error_msg[PlyInfo::E_NO_3VERTINFACE ]="Face with more than 3 vertices";
		ply_error_msg[PlyInfo::E_BAD_VERT_INDEX ]="Bad vertex index in face";
		ply_error_msg[PlyInfo::E_BAD_VERT_INDEX_EDGE ]="Bad vertex index in edge";
		ply_error_msg[PlyInfo::E_NO_6TCOORD     ]="Face with no 6 texture coordinates";
		ply_error_msg[PlyInfo::E_DIFFER_COLORS  ]="Number of color differ from vertices";
	}

	if(error>PlyInfo::E_MAXPLYINFOERRORS || error<0) return "Unknown error";
	else return ply_error_msg[error].c_str();
};

// to check if a given error is critical or not.
static bool ErrorCritical(int err)
{
	if(err == PlyInfo::E_NO_FACE) return false;
	return true;
}


/// Standard call for reading a mesh, returns 0 on success.
static int Open( OpenMeshType &m, const char * filename, CallBackPos *cb=0)
{
	PlyInfo pi;
	pi.cb=cb;
	return Open(m, filename, pi);
}

/// Read a mesh and store in loadmask the loaded field
/// Note that loadmask is not read! just modified. You cannot specify what fields
/// have to be read. ALL the data for which your mesh HasSomething and are present
/// in the file are read in.
static int Open( OpenMeshType &m, const char * filename, int & loadmask, CallBackPos *cb =0)
{
	PlyInfo pi;
	pi.cb=cb;
	int r = Open(m, filename,pi);
	loadmask=pi.mask;
	return r;
}


/// read a mesh with all the possible option specified in the PlyInfo obj, returns 0 on success.
static int Open( OpenMeshType &m, const char * filename, PlyInfo &pi )
{
	assert(filename!=0);
	std::vector<VertexPointer> index;
	LoadPly_FaceAux fa;
	LoadPly_EdgeAux ea;
	LoadPly_TristripAux tsa;
	LoadPly_VertAux<ScalarType> va;

	LoadPly_RangeGridAux rga;
	std::vector<int> RangeGridAuxVec;
	int RangeGridCols=0;
	int RangeGridRows=0;


	pi.mask = 0;
	bool hasIntensity = false; // the intensity is a strange way to code single channel color used sometimes in rangemap. it is a kind of color. so it do not need another entry in the IOM mask.
	bool multit = false; // true if texture has a per face int spec the texture index

	va.flags = 42;

	pi.status = ::vcg::ply::E_NOERROR;

	/*
	// TO BE REMOVED: tv not used AND "spurious" vertex declaration causes error if ocf

	// init defaults
	VertexType tv;
	//tv.ClearFlags();

	if (vcg::tri::HasPerVertexQuality(m)) tv.Q() = (typename OpenMeshType::VertexType::QualityType)1.0;
	if (vcg::tri::HasPerVertexColor  (m)) tv.C() = Color4b(Color4b::White);
	*/

	// Descrittori delle strutture

	//bool isvflags = false;	// Il file contiene i flags


	// The main descriptor of the ply file
	vcg::ply::PlyFile pf;

	// Open the file and parse the header
	if( pf.Open(filename,vcg::ply::PlyFile::MODE_READ)==-1 )
	{
		pi.status = pf.GetError();
		return pi.status;
	}
	pi.header = pf.GetHeader();

	// Descrittori della camera
	{  // Check that all the camera properties are present.
		bool found = true;
		for(int i=0;i<23;++i)
		{
			if( pf.AddToRead(CameraDesc(i))==-1 ) {
				found = false;
				break;
			}
		}
		if(found) pi.mask |= Mask::IOM_CAMERA;
	}

	// Standard data desciptors (vertex coord and faces)
	if( pf.AddToRead(VertDesc(0))==-1 && pf.AddToRead(VertDesc(22)) ) { pi.status = PlyInfo::E_NO_VERTEX; return pi.status; }
	if( pf.AddToRead(VertDesc(1))==-1 && pf.AddToRead(VertDesc(23)) ) { pi.status = PlyInfo::E_NO_VERTEX; return pi.status; }
	if( pf.AddToRead(VertDesc(2))==-1 && pf.AddToRead(VertDesc(24)) ) { pi.status = PlyInfo::E_NO_VERTEX; return pi.status; }
	if( pf.AddToRead(FaceDesc(0))==-1 ) // Se fallisce si prova anche la sintassi di rapidform con index al posto di indices
	{
		int ii;
		for (ii=_FACEDESC_FIRST_;ii< _FACEDESC_LAST_;++ii)
			if( pf.AddToRead(FaceDesc(ii))!=-1 ) break;

		if (ii==_FACEDESC_LAST_)
		if(pf.AddToRead(TristripDesc(0))==-1) // Se fallisce tutto si prova a vedere se ci sono tristrip alla levoy.
		if(pf.AddToRead(RangeDesc(0))==-1) // Se fallisce tutto si prova a vedere se ci sono rangemap alla levoy.
		{
			pi.status = PlyInfo::E_NO_FACE;
			//return pi.status;  no face is not a critical error. let's continue.
		}

	}
	// Optional flag descriptors
	if(pf.AddToRead(EdgeDesc(0) )!= -1 && pf.AddToRead(EdgeDesc(1)) != -1 )
		pi.mask |= Mask::IOM_EDGEINDEX;

	if(vcg::tri::HasPerVertexFlags(m) && pf.AddToRead(VertDesc(3))!=-1 )
		pi.mask |= Mask::IOM_VERTFLAGS;

	if( vcg::tri::HasPerVertexNormal(m) )
	{
		if(		pf.AddToRead(VertDesc(12))!=-1  && pf.AddToRead(VertDesc(13))!=-1  && pf.AddToRead(VertDesc(14))!=-1 )
			pi.mask |= Mask::IOM_VERTNORMAL;
		else // try also for Normals stored with doubles
			if(		pf.AddToRead(VertDesc(25))!=-1  && pf.AddToRead(VertDesc(26))!=-1  && pf.AddToRead(VertDesc(27))!=-1 )
				pi.mask |= Mask::IOM_VERTNORMAL;

	 }

	if( vcg::tri::HasPerVertexQuality(m) )
	{
		if( pf.AddToRead(VertDesc(4))!=-1 ||
				pf.AddToRead(VertDesc(11))!=-1 )
			pi.mask |= Mask::IOM_VERTQUALITY;
	}

	if(vcg::tri::HasPerVertexColor(m) )
	{
		if( pf.AddToRead(VertDesc(5))!=-1 )
		{
			pf.AddToRead(VertDesc(6));
			pf.AddToRead(VertDesc(7));
			pi.mask |= Mask::IOM_VERTCOLOR;
		}
		if( pf.AddToRead(VertDesc(8))!=-1 )
		{
			pf.AddToRead(VertDesc(9));
			pf.AddToRead(VertDesc(10));
			pi.mask |= Mask::IOM_VERTCOLOR;
		}
		if( pf.AddToRead(VertDesc(19))!=-1 )
		{
			hasIntensity = true;
			pi.mask |= Mask::IOM_VERTCOLOR;
		}

	}
	if( tri::HasPerVertexTexCoord(m) )
	{
		if(( pf.AddToRead(VertDesc(20))!=-1 )&&  (pf.AddToRead(VertDesc(21))!=-1))
		{
			pi.mask |= Mask::IOM_VERTTEXCOORD;
		}
		if(( pf.AddToRead(VertDesc(16))!=-1 )&&  (pf.AddToRead(VertDesc(17))!=-1))
		{
			pi.mask |= Mask::IOM_VERTTEXCOORD;
		}
	}
	if(tri::HasPerVertexRadius(m))
	{
		if( pf.AddToRead(VertDesc(15))!=-1 )
			pi.mask |= Mask::IOM_VERTRADIUS;
		else if( pf.AddToRead(VertDesc(28))!=-1 )
			pi.mask |= Mask::IOM_VERTRADIUS;
	}
	// se ci sono i flag per vertice ci devono essere anche i flag per faccia
	if( pf.AddToRead(FaceDesc(1))!=-1 )
		pi.mask |= Mask::IOM_FACEFLAGS;

	if( vcg::tri::HasPerFaceQuality(m) )
	{
		if( pf.AddToRead(FaceDesc(2))!=-1 )
			pi.mask |= Mask::IOM_FACEQUALITY;
	}

	if( vcg::tri::HasPerFaceColor(m)  )
	{
		if( pf.AddToRead(FaceDesc(6))!=-1 )
		{
			pf.AddToRead(FaceDesc(7));
			pf.AddToRead(FaceDesc(8));
			pi.mask |= Mask::IOM_FACECOLOR;
		}
	}


	if( vcg::tri::HasPerWedgeTexCoord(m) )
	{
		if( pf.AddToRead(FaceDesc(3))!=-1 )
		{
			if(pf.AddToRead(FaceDesc(5))==0) {
				multit=true; // try to read also the multi texture indicies
				pi.mask |= Mask::IOM_WEDGTEXMULTI;
			}
			pi.mask |= Mask::IOM_WEDGTEXCOORD;
		}
	}

	if( vcg::tri::HasPerFaceColor(m) || vcg::tri::HasPerVertexColor(m) || vcg::tri::HasPerWedgeColor(m) )
	{
		if( pf.AddToRead(FaceDesc(4))!=-1 )
		{
			pi.mask |= Mask::IOM_WEDGCOLOR;
		}
	}

	// User defined descriptors
	std::vector<PropDescriptor> VPV(pi.vdn); // property descriptor relative al tipo LoadPly_VertexAux
	std::vector<PropDescriptor> FPV(pi.fdn); // property descriptor relative al tipo LoadPly_FaceAux
	if(pi.vdn>0){
		// Compute the total size needed to load additional per vertex data.
		size_t totsz=0;
		for(int i=0;i<pi.vdn;i++){
			VPV[i] = pi.VertexData[i];
			VPV[i].offset1=offsetof(LoadPly_VertAux<ScalarType>,data)+totsz;
			totsz+=pi.VertexData[i].memtypesize();
			if( pf.AddToRead(VPV[i])==-1 ) { pi.status = pf.GetError(); return pi.status; }
		}
		if(totsz > MAX_USER_DATA)
		{
			pi.status = vcg::ply::E_BADTYPE;
			return pi.status;
		}
	}
	if(pi.fdn>0){
		size_t totsz=0;
		for(int i=0;i<pi.fdn;i++){
			FPV[i] = pi.FaceData[i];
			FPV[i].offset1=offsetof(LoadPly_FaceAux,data)+totsz;
			totsz+=pi.FaceData[i].memtypesize();
			if( pf.AddToRead(FPV[i])==-1 ) { pi.status = pf.GetError(); return pi.status; }
		}
		if(totsz > MAX_USER_DATA)
		{
			pi.status = vcg::ply::E_BADTYPE;
			return pi.status;
		}
	}

	/**************************************************************/
	/* Main Reading Loop */
	/**************************************************************/
	m.Clear();
	for(int i=0;i<int(pf.elements.size());i++)
	{
		int n = pf.ElemNumber(i);

		if( !strcmp( pf.ElemName(i),"camera" ) )
		{
			pf.SetCurElement(i);

			LoadPly_Camera ca;

			for(int j=0;j<n;++j)
			{
				if( pf.Read( (void *)&(ca) )==-1 )
				{
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}
				//camera.valid     = true;

				// extrinsic
				m.shot.Extrinsics.SetIdentity();
				// view point
				m.shot.Extrinsics.SetTra(Point3<ScalarType>( ca.view_px,ca.view_py,ca.view_pz));

				// axis (i.e. rotation).
				Matrix44<ScalarType> rm;
				rm.SetIdentity();
				rm[0][0] = ca.x_axisx;
				rm[0][1] = ca.x_axisy;
				rm[0][2] = ca.x_axisz;

				rm[1][0] = ca.y_axisx;
				rm[1][1] = ca.y_axisy;
				rm[1][2] = ca.y_axisz;

				rm[2][0] = ca.z_axisx;
				rm[2][1] = ca.z_axisy;
				rm[2][2] = ca.z_axisz;

				m.shot.Extrinsics.SetRot(rm);

				//intrinsic
				m.shot.Intrinsics.FocalMm        = ca.focal;
				m.shot.Intrinsics.PixelSizeMm[0] = ca.scalex;
				m.shot.Intrinsics.PixelSizeMm[1] = ca.scaley;
				m.shot.Intrinsics.CenterPx[0]    = ca.centerx;
				m.shot.Intrinsics.CenterPx[1]    = ca.centery;
				m.shot.Intrinsics.ViewportPx[0]  = ca.viewportx;
				m.shot.Intrinsics.ViewportPx[1]  = ca.viewporty;
				m.shot.Intrinsics.k[0]           = ca.k1;
				m.shot.Intrinsics.k[1]           = ca.k2;
				m.shot.Intrinsics.k[2]           = ca.k3;
				m.shot.Intrinsics.k[3]           = ca.k4;

			}
		}
		else if( !strcmp( pf.ElemName(i),"vertex" ) )
		{
			int j;

			pf.SetCurElement(i);
			VertexIterator vi=Allocator<OpenMeshType>::AddVertices(m,n);

			for(j=0;j<n;++j)
			{
				if(pi.cb && (j%1000)==0) pi.cb(j*50/n,"Vertex Loading");
				if( pf.Read( (void *)&(va) )==-1 )
				{
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}

				(*vi).P()[0] = va.p[0];
				(*vi).P()[1] = va.p[1];
				(*vi).P()[2] = va.p[2];

				if( HasPerVertexFlags(m) &&  (pi.mask & Mask::IOM_VERTFLAGS) )
					(*vi).Flags() = va.flags;

				if( pi.mask & Mask::IOM_VERTQUALITY )
					(*vi).Q() = (typename OpenMeshType::VertexType::QualityType)va.q;

				if( pi.mask & Mask::IOM_VERTNORMAL )
				{
					(*vi).N()[0]=va.n[0];
					(*vi).N()[1]=va.n[1];
					(*vi).N()[2]=va.n[2];
				}

				if( pi.mask & Mask::IOM_VERTTEXCOORD )
				{
					(*vi).T().P().X() = va.u;
					(*vi).T().P().Y() = va.v;
				}

				if( pi.mask & Mask::IOM_VERTCOLOR )
				{
					if(hasIntensity)
						(*vi).C().SetGrayShade(va.intensity);
					else
					{
						(*vi).C()[0] = va.r;
						(*vi).C()[1] = va.g;
						(*vi).C()[2] = va.b;
						(*vi).C()[3] = 255;
					}
				}
				if( pi.mask & Mask::IOM_VERTRADIUS )
					(*vi).R() = va.radius;


				for(int k=0;k<pi.vdn;k++)
					memcpy((char *)(&*vi) + pi.VertexData[k].offset1,
						   (char *)(&va) + VPV[k].offset1,
						   VPV[k].memtypesize());
				++vi;
			}

			index.resize(n);
			for(j=0,vi=m.vert.begin();j<n;++j,++vi)
				index[j] = &*vi;
		}
		else if( !strcmp( pf.ElemName(i),"edge") && (n>0) )/******************** EDGE READING *******************************/
		{
			assert( pi.mask & Mask::IOM_EDGEINDEX );
			EdgeIterator ei=Allocator<OpenMeshType>::AddEdges(m,n);
			pf.SetCurElement(i);
			for(int j=0;j<n;++j)
			{
				if(pi.cb && (j%1000)==0) pi.cb(50+j*50/n,"Edge Loading");
				if( pf.Read(&ea)==-1 )
				{
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}
				if( ea.v1<0 || ea.v2<0 || ea.v1>=m.vn || ea.v2>=m.vn)
				{
					pi.status = PlyInfo::E_BAD_VERT_INDEX_EDGE;
					return pi.status;
				}
				(*ei).V(0) = index[ ea.v1 ];
				(*ei).V(1) = index[ ea.v2 ];
				++ei;
			}
		}
		else if( !strcmp( pf.ElemName(i),"face") && (n>0) )/******************** FACE READING ****************************************/
		{
			int j;

			FaceIterator fi=Allocator<OpenMeshType>::AddFaces(m,n);
			pf.SetCurElement(i);

			for(j=0;j<n;++j)
			{
				int k;

				if(pi.cb && (j%1000)==0) pi.cb(50+j*50/n,"Face Loading");
				if( pf.Read(&fa)==-1 )
				{
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}
				if(fa.size!=3)
				{ // Non triangular face are manageable ONLY if there are no Per Wedge attributes
					if( ( pi.mask & Mask::IOM_WEDGCOLOR ) || ( pi.mask & Mask::IOM_WEDGTEXCOORD ) )
					{
						pi.status = PlyInfo::E_NO_3VERTINFACE;
						return pi.status;
					}
				}

				if(HasPolyInfo(m)) (*fi).Alloc(3);

				if(HasPerFaceFlags(m) &&( pi.mask & Mask::IOM_FACEFLAGS) )
				{
					(*fi).Flags() = fa.flags;
				}

				if( pi.mask & Mask::IOM_FACEQUALITY )
				{
					(*fi).Q() = (typename OpenMeshType::FaceType::QualityType) fa.q;
				}

				if( pi.mask & Mask::IOM_FACECOLOR )
				{
					(*fi).C()[0] = fa.r;
					(*fi).C()[1] = fa.g;
					(*fi).C()[2] = fa.b;
					(*fi).C()[3] = 255;
				}

				if( pi.mask & Mask::IOM_WEDGTEXCOORD )
				{
					for(int k=0;k<3;++k)
					{
						(*fi).WT(k).u() = fa.texcoord[k*2+0];
						(*fi).WT(k).v() = fa.texcoord[k*2+1];
						if(multit) (*fi).WT(k).n() = fa.texcoordind;
						else (*fi).WT(k).n()=0; // safely intialize texture index
					}
				}

				if( pi.mask & Mask::IOM_WEDGCOLOR )
				{
					if(FaceType::HasWedgeColor()){
						for(int k=0;k<3;++k)
						{
							(*fi).WC(k)[0] = (unsigned char)(fa.colors[k*3+0]*255);
							(*fi).WC(k)[1] = (unsigned char)(fa.colors[k*3+1]*255);
							(*fi).WC(k)[2] = (unsigned char)(fa.colors[k*3+2]*255);
						}
					}
					//if(FaceType::HasFaceColor()){
					//if(pi.mask & Mask::IOM_FACECOLOR){
					if(HasPerFaceColor(m))	{
						(*fi).C()[0] = (unsigned char)((fa.colors[0*3+0]*255+fa.colors[1*3+0]*255+fa.colors[2*3+0]*255)/3.0f);
						(*fi).C()[1] = (unsigned char)((fa.colors[0*3+1]*255+fa.colors[1*3+1]*255+fa.colors[2*3+1]*255)/3.0f);
						(*fi).C()[2] = (unsigned char)((fa.colors[0*3+2]*255+fa.colors[1*3+2]*255+fa.colors[2*3+2]*255)/3.0f);
					}
				}
				/// Now the temporary struct 'fa' is ready to be copied into the real face '*fi'
				/// This loop
				for(k=0;k<3;++k)
				{
					if( fa.v[k]<0 || fa.v[k]>=m.vn )
					{
						pi.status = PlyInfo::E_BAD_VERT_INDEX;
						return pi.status;
					}
					(*fi).V(k) = index[ fa.v[k] ];
				}

				// tag faux vertices of first face
				if (fa.size>3) fi->SetF(2);

				for(k=0;k<pi.fdn;k++)
					memcpy((char *)(&(*fi)) + pi.FaceData[k].offset1,
						   (char *)(&fa) + FPV[k].offset1,
						   FPV[k].memtypesize());


				++fi;

				// Non Triangular Faces Loop
				// It performs a simple fan triangulation.
				if(fa.size>3)
				{
					int curpos=int(fi-m.face.begin());
					Allocator<OpenMeshType>::AddFaces(m,fa.size-3);
					fi=m.face.begin()+curpos;
					pi.mask |= Mask::IOM_BITPOLYGONAL;
				}
				for(int qq=0;qq<fa.size-3;++qq)
				{
					(*fi).V(0) = index[ fa.v[0] ];
					for(k=1;k<3;++k)
					{
						if( fa.v[2+qq]<0 || fa.v[2+qq]>=m.vn )
						{
							pi.status = PlyInfo::E_BAD_VERT_INDEX;
							return pi.status;
						}
						(*fi).V(k) = index[ fa.v[1+qq+k] ];

					}

					// tag faux vertices of extra faces
					fi->SetF(0);
					if (qq!=fa.size-3) fi->SetF(2);

					for(k=0;k<pi.fdn;k++)
						memcpy((char *)(&(*fi)) + pi.FaceData[k].offset1,
							   (char *)(&fa) + FPV[k].offset1, FPV[k].memtypesize());
					++fi;
				}

			}
		}else if( !strcmp( pf.ElemName(i),"tristrips") )//////////////////// LETTURA TRISTRIP DI STANFORD
		{
			int j;
			pf.SetCurElement(i);
			int numvert_tmp = (int)m.vert.size();
			for(j=0;j<n;++j)
			{
				int k;
				if(pi.cb && (j%1000)==0) pi.cb(50+j*50/n,"Tristrip Face Loading");
				if( pf.Read(&tsa)==-1 )
				{
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}
				int remainder=0;
				for(k=0;k<tsa.size-2;++k)
				{
					if(pi.cb && (k%1000)==0) pi.cb(50+k*50/tsa.size,"Tristrip Face Loading");
					if(tsa.v[k]<0 || tsa.v[k]>=numvert_tmp )	{
						pi.status = PlyInfo::E_BAD_VERT_INDEX;
						return pi.status;
					}
					if(tsa.v[k+2]==-1)
					{
						k+=2;
						if(k%2) remainder=0;
						else remainder=1;
						continue;
					}
					Allocator<OpenMeshType>::AddFaces(m,1);
					FaceType &tf =m.face.back();
					tf.V(0) = index[ tsa.v[k+0] ];
					tf.V(1) = index[ tsa.v[k+1] ];
					tf.V(2) = index[ tsa.v[k+2] ];
					if((k+remainder)%2) std::swap (tf.V(0), tf.V(1) );
				}
			}
		}
		else if( !strcmp( pf.ElemName(i),"range_grid") )//////////////////// LETTURA RANGEMAP DI STANFORD
		{
			//qDebug("Starting Reading of Range Grid");
			if(RangeGridCols==0) // not initialized.
			{
				for(int co=0;co<int(pf.comments.size());++co)
				{
					std::string num_cols = "num_cols";
					std::string num_rows = "num_rows";
					std::string &c = pf.comments[co];
					std::string bufstr,bufclean;
					if( num_cols == c.substr(0,num_cols.length()) )
					{
						bufstr = c.substr(num_cols.length()+1);
						RangeGridCols = atoi(bufstr.c_str());
					}
					if( num_rows == c.substr(0,num_cols.length()) )
					{
						bufstr = c.substr(num_rows.length()+1);
						RangeGridRows = atoi(bufstr.c_str());
					}
				}
				//qDebug("Rows %i Cols %i",RangeGridRows,RangeGridCols);
			}
			int totPnt = RangeGridCols*RangeGridRows;
			// standard reading;
			pf.SetCurElement(i);
			for(int j=0;j<totPnt;++j)
			{
				if(pi.cb && (j%1000)==0) pi.cb(50+j*50/totPnt,"RangeMap Face Loading");
				if( pf.Read(&rga)==-1 )
				{
					//qDebug("Error after loading %i elements",j);
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}
				else
				{
					if(rga.num_pts == 0)
						RangeGridAuxVec.push_back(-1);
					else
						RangeGridAuxVec.push_back(rga.pts[0]);
				}
			}
			//qDebug("Completed the reading of %i indexes",RangeGridAuxVec.size());
			tri::FaceGrid(m, RangeGridAuxVec, RangeGridCols,RangeGridRows);
		}
		else
		{
			// Skippaggio elementi non gestiti
			int n = pf.ElemNumber(i);
			pf.SetCurElement(i);

			for(int j=0;j<n;j++)
			{
				if( pf.Read(0)==-1)
				{
					pi.status = PlyInfo::E_SHORTFILE;
					return pi.status;
				}
			}
		}
	}

	// Parsing texture names
	m.textures.clear();
	m.normalmaps.clear();

	for(int co=0;co<int(pf.comments.size());++co)
	{
		std::string TFILE = "TextureFile";
		std::string NFILE = "TextureNormalFile";
		std::string &c = pf.comments[co];
		//		char buf[256];
		std::string bufstr,bufclean;
		int i,n;

		if( TFILE == c.substr(0,TFILE.length()) )
		{
			bufstr = c.substr(TFILE.length()+1);
			n = static_cast<int>(bufstr.length());
			for(i=0;i<n;i++)
				if( bufstr[i]!=' ' && bufstr[i]!='\t' && bufstr[i]>32 && bufstr[i]<125 )	bufclean.push_back(bufstr[i]);

			char buf2[255];
			ply::interpret_texture_name( bufclean.c_str(),filename,buf2 );
			m.textures.push_back( std::string(buf2) );
		}
		/*if( !strncmp(c,NFILE,strlen(NFILE)) )
		{
			strcpy(buf,c+strlen(NFILE)+1);
			n = strlen(buf);
			for(i=j=0;i<n;i++)
				if( buf[i]!=' ' && buf[i]!='\t' && buf[i]>32 && buf[i]<125 )	buf[j++] = buf[i];

			buf[j] = 0;
			char buf2[255];
			__interpret_texture_name( buf,filename,buf2 );
			m.normalmaps.push_back( string(buf2) );
		}*/
	}

	// vn and fn should be correct but if someone wrongly saved some deleted elements they can be wrong.
	m.vn = 0;
	for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)
		if( ! (*vi).IsD() )
			++m.vn;

	m.fn = 0;
	for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi)
		if( ! (*fi).IsD() )
			++m.fn;

	tri::UpdateBounding<OpenMeshType>::Box(m);
	return 0;
}


// Caricamento camera da un ply
int LoadCamera(const char * filename)
{
	vcg::ply::PlyFile pf;
	if( pf.Open(filename,vcg::ply::PlyFile::MODE_READ)==-1 )
	{
		this->pi.status = pf.GetError();
		return this->pi.status;
	}


	bool found = true;
	int i;
	for(i=0;i<23;++i)
	{
		if( pf.AddToRead(CameraDesc(i))==-1 )
		{
			found = false;
			break;
		}
	}

	if(!found)
		return this->pi.status;

	for(i=0;i<int(pf.elements.size());i++)
	{
		int n = pf.ElemNumber(i);

		if( !strcmp( pf.ElemName(i),"camera" ) )
		{
			pf.SetCurElement(i);

			LoadPly_Camera ca;

			for(int j=0;j<n;++j)
			{
				if( pf.Read( (void *)&(ca) )==-1 )
				{
					this->pi.status = PlyInfo::E_SHORTFILE;
					return this->pi.status;
				}
				this->camera.valid     = true;
				this->camera.view_p[0] = ca.view_px;
				this->camera.view_p[1] = ca.view_py;
				this->camera.view_p[2] = ca.view_pz;
				this->camera.x_axis[0] = ca.x_axisx;
				this->camera.x_axis[1] = ca.x_axisy;
				this->camera.x_axis[2] = ca.x_axisz;
				this->camera.y_axis[0] = ca.y_axisx;
				this->camera.y_axis[1] = ca.y_axisy;
				this->camera.y_axis[2] = ca.y_axisz;
				this->camera.z_axis[0] = ca.z_axisx;
				this->camera.z_axis[1] = ca.z_axisy;
				this->camera.z_axis[2] = ca.z_axisz;
				this->camera.f         = ca.focal;
				this->camera.s[0]      = ca.scalex;
				this->camera.s[1]      = ca.scaley;
				this->camera.c[0]      = ca.centerx;
				this->camera.c[1]      = ca.centery;
				this->camera.viewport[0] = ca.viewportx;
				this->camera.viewport[1] = ca.viewporty;
				this->camera.k[0]      = ca.k1;
				this->camera.k[1]      = ca.k2;
				this->camera.k[2]      = ca.k3;
				this->camera.k[3]      = ca.k4;
			}
			break;
		}
	}

	return 0;
}


static bool LoadMask(const char * filename, int &mask)
{
	PlyInfo pi;
	return LoadMask(filename, mask,pi);
}
static bool LoadMask(const char * filename, int &mask, PlyInfo &pi)
{
	mask=0;
	vcg::ply::PlyFile pf;
	if( pf.Open(filename,vcg::ply::PlyFile::MODE_READ)==-1 )
	{
		pi.status = pf.GetError();
		return false;
	}

	if( pf.AddToRead(VertDesc( 0))!=-1 &&
		pf.AddToRead(VertDesc( 1))!=-1 &&
		pf.AddToRead(VertDesc( 2))!=-1 )   mask |= Mask::IOM_VERTCOORD;
	if( pf.AddToRead(VertDesc(22))!=-1 &&
		pf.AddToRead(VertDesc(23))!=-1 &&
		pf.AddToRead(VertDesc(24))!=-1 )   mask |= Mask::IOM_VERTCOORD;

	if( pf.AddToRead(VertDesc(12))!=-1 &&
		pf.AddToRead(VertDesc(13))!=-1 &&
		pf.AddToRead(VertDesc(14))!=-1 )   mask |= Mask::IOM_VERTNORMAL;
	if( pf.AddToRead(VertDesc(25))!=-1 &&
		pf.AddToRead(VertDesc(26))!=-1 &&
		pf.AddToRead(VertDesc(27))!=-1 )   mask |= Mask::IOM_VERTNORMAL;

	if( pf.AddToRead(VertDesc( 3))!=-1 )   mask |= Mask::IOM_VERTFLAGS;
	if( pf.AddToRead(VertDesc( 4))!=-1 )   mask |= Mask::IOM_VERTQUALITY;
	if( pf.AddToRead(VertDesc(11))!=-1 )   mask |= Mask::IOM_VERTQUALITY;
	if( pf.AddToRead(VertDesc(15))!=-1 )   mask |= Mask::IOM_VERTRADIUS;
	if( pf.AddToRead(VertDesc(28))!=-1 )   mask |= Mask::IOM_VERTRADIUS;
	if( pf.AddToRead(VertDesc( 5))!=-1 &&
		pf.AddToRead(VertDesc( 6))!=-1 &&
		pf.AddToRead(VertDesc( 7))!=-1  )  mask |= Mask::IOM_VERTCOLOR;
	if( pf.AddToRead(VertDesc( 8))!=-1 &&
		pf.AddToRead(VertDesc( 9))!=-1 &&
		pf.AddToRead(VertDesc(10))!=-1  )  mask |= Mask::IOM_VERTCOLOR;
	if( pf.AddToRead(VertDesc(19))!=-1  )  mask |= Mask::IOM_VERTCOLOR;

	if( pf.AddToRead(VertDesc(20))!=-1  &&
		pf.AddToRead(VertDesc(21))!=-1)    mask |= Mask::IOM_VERTTEXCOORD;

	if( pf.AddToRead(VertDesc(16))!=-1  &&
		pf.AddToRead(VertDesc(17))!=-1)    mask |= Mask::IOM_VERTTEXCOORD;

	if( pf.AddToRead(FaceDesc(0))!=-1 )    mask |= Mask::IOM_FACEINDEX;
	if( pf.AddToRead(FaceDesc(1))!=-1 )    mask |= Mask::IOM_FACEFLAGS;

	if( pf.AddToRead(FaceDesc(2))!=-1 )    mask |= Mask::IOM_FACEQUALITY;
	if( pf.AddToRead(FaceDesc(3))!=-1 )    mask |= Mask::IOM_WEDGTEXCOORD;
	if( pf.AddToRead(FaceDesc(5))!=-1 )    mask |= Mask::IOM_WEDGTEXMULTI;
	if( pf.AddToRead(FaceDesc(4))!=-1 )    mask |= Mask::IOM_WEDGCOLOR;
	if( pf.AddToRead(FaceDesc(6))!=-1 &&
		pf.AddToRead(FaceDesc(7))!=-1 &&
		pf.AddToRead(FaceDesc(8))!=-1 )    mask |= Mask::IOM_FACECOLOR;

	return true;
}


}; // end class


} // end namespace tri
} // end namespace io
} // end namespace vcg

#endif

