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UnrealEngine/Engine/Source/ThirdParty/Alembic/alembic-1.8.7/examples/AbcClients/WFObjConvert/Parser.cpp
2025-05-18 13:04:45 +08:00

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//-*****************************************************************************
//
// Copyright (c) 2009-2012,
// Sony Pictures Imageworks, Inc. and
// Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Sony Pictures Imageworks, nor
// Industrial Light & Magic nor the names of their contributors may be used
// to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//-*****************************************************************************
#include <AbcClients/WFObjConvert/ParseReader.h>
#include <AbcClients/WFObjConvert/Parser.h>
//-*****************************************************************************
// I'm breaking with the Alembic "Foundation" and "FoundationPrivate"
// conventions here because I want to limit the exposure to these files,
// as they take FOREVER to parse/compile, because of all the template-hoo-haa.
#include <boost/config/warning_disable.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/phoenix_stl.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/bind.hpp>
#include <iostream>
#include <string>
#include <fstream>
#include <sstream>
#include <exception>
#include <stdexcept>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
namespace AbcClients {
namespace WFObjConvert {
//-*****************************************************************************
// Create a namespace to hide the parser stuff in.
// Following spirit convention, calling this 'client'
namespace client {
// Bring in all the pieces we need.
namespace qi = boost::spirit::qi;
namespace ascii = boost::spirit::ascii;
namespace phoenix = boost::phoenix;
using qi::double_;
using qi::int_;
using qi::long_long;
using qi::phrase_parse;
using qi::_1;
using qi::_val;
using qi::lit;
using qi::eol;
using qi::eps;
using qi::lexeme;
using qi::attr;
using ascii::space;
using ascii::space_type;
using ascii::char_;
using ascii::string;
using phoenix::ref;
using phoenix::push_back;
//-*****************************************************************************
// Symbol table for 'on off'
struct onOff_ : qi::symbols<char,bool>
{
onOff_()
{
add
( "on" , true )
( "On" , true )
( "ON" , true )
( "true", true )
( "True", true )
( "TRUE" , true )
( "off", false )
( "Off", false )
( "OFF", false )
( "false", false )
( "False", false )
( "FALSE", false )
;
}
};
//-*****************************************************************************
typedef boost::fusion::vector<pindex_t, pindex_t, pindex_t> index_triplet;
//-*****************************************************************************
// Create a local parse reader that uses the boost::fusion index-triplet.
class LclParseReader : public ParseReader
{
public:
LclParseReader( Reader &iReadInto )
: ParseReader( iReadInto ) {}
LclParseReader( const ParseReader &iCopy )
: ParseReader( iCopy ) {}
static V3idx toV3( index_triplet const &iVal )
{
return V3idx( ( pindex_t )boost::fusion::at_c<0>( iVal ),
( pindex_t )boost::fusion::at_c<1>( iVal ),
( pindex_t )boost::fusion::at_c<2>( iVal ) );
}
void f_( std::vector<index_triplet> const &vals )
{
std::vector<V3idx> cvt;
for ( std::vector<index_triplet>::const_iterator iter = vals.begin();
iter != vals.end(); ++iter )
{
cvt.push_back( toV3(*iter) );
}
this->f( cvt );
}
void l_( std::vector<index_triplet> const &vals )
{
std::vector<V3idx> cvt;
for ( std::vector<index_triplet>::const_iterator iter = vals.begin();
iter != vals.end(); ++iter )
{
cvt.push_back( toV3(*iter) );
}
this->l( cvt );
}
void p_( std::vector<index_triplet> const &vals )
{
std::vector<V3idx> cvt;
for ( std::vector<index_triplet>::const_iterator iter = vals.begin();
iter != vals.end(); ++iter )
{
cvt.push_back( toV3(*iter) );
}
this->p( cvt );
}
};
//-*****************************************************************************
typedef std::string::const_iterator Iterator;
//-*****************************************************************************
// This grammar parses OBJ's different styles of index-triplets.
// template <typename Iterator>
struct indexTriplet : qi::grammar<Iterator, index_triplet(),space_type >
{
qi::rule<Iterator, index_triplet(),space_type > start;
#define LL long_long
indexTriplet() : indexTriplet::base_type( start )
{
//start = lexeme[( ( LL >> attr( -1 ) >> attr( -1 ) ) |
// ( LL >> '/' >> LL >> '/' >> LL ) |
// ( LL >> '/' >> LL >> attr( -1 ) ) |
// ( LL >> '/' >> attr(-1) >> '/' >> LL ) )];
start = lexeme[( ( LL >> '/' >> LL >> '/' >> LL ) |
( LL >> '/' >> attr( -1 ) >> '/' >> LL ) |
( LL >> '/' >> LL >> '/' >> attr( -1 ) ) |
( LL >> attr( -1 ) >> attr( -1 ) ) )];
}
#undef LL
};
//-*****************************************************************************
// REAL PARSE FUNCTION
void doParseOBJ( Reader &iReadInto,
const std::string &iName, std::istream &iStream )
{
// Create an index-triplet parser, call it "IDX"
//indexTriplet<Iterator> IDX;
indexTriplet IDX;
// Create a 'space-less' name parser.
qi::rule<Iterator,std::string()> STR = lexeme[+(char_)];
// Make an on-off symbol table
onOff_ ON_OFF;
// Create types of rules. the PT_RULE is one which reads point
// declarations.
typedef qi::rule<Iterator, std::vector<double>(), space_type> PT_RULE;
// The ELEM_RULE is one which reads element declarations with
// lists of index triplets.
typedef qi::rule<Iterator, std::vector<index_triplet>(),
space_type> ELEM_RULE;
// The NAME RULE is one which reads a single name
typedef qi::rule<Iterator, std::string(), space_type> NAME_RULE;
// The NAMES_RULE is one which reads lists of names
typedef qi::rule<Iterator, std::vector<std::string>(),
space_type> NAMES_RULE;
// The BOOL_RULE is one which reads 'on' or 'off' or 'true' or 'false'
// or 'ON' or 'OFF' ... etc.
typedef qi::rule<Iterator, bool(), space_type> BOOL_RULE;
// The INT_RULE is one which reads a single int
typedef qi::rule<Iterator, int(), space_type> INT_RULE;
// The REACT macro binds the result of a successfully parsed rule
// to a member function of the PreReader
LclParseReader preReader( iReadInto );
#define REACT( F ) boost::bind( &LclParseReader:: F , &preReader, ::_1 )
// Declare our rules.
PT_RULE VERTEX = "v" >> +(double_);
PT_RULE VTEX = "vt" >> +(double_);
PT_RULE VNORM = "vn" >> +(double_);
PT_RULE VPARAM = "vp" >> +(double_);
ELEM_RULE FACE = "f" >> IDX >> IDX >> +(IDX);
ELEM_RULE LINE = "l" >> IDX >> +(IDX);
ELEM_RULE POINT = "p" >> +(IDX);
NAMES_RULE GROUP = "g" >> +(STR);
NAME_RULE OBJECT = "o" >> (STR);
NAME_RULE MTLLIB = "mtllib" >> STR;
NAME_RULE MAPLIB = "maplib" >> STR;
NAME_RULE USEMAP = "usemap" >> STR;
NAME_RULE USEMTL = "usemtl" >> STR;
NAME_RULE TRACE_OBJ = "trace_obj" >> STR;
NAME_RULE SHADOW_OBJ = "shadow_obj" >> STR;
BOOL_RULE BEVEL = "bevel" >> ON_OFF;
BOOL_RULE CINTERP = "cinterp" >> ON_OFF;
BOOL_RULE DINTERP = "dinterp" >> ON_OFF;
BOOL_RULE SMOOTHB = "s" >> ON_OFF;
INT_RULE SMOOTHI = "s" >> int_;
INT_RULE LOD = "lod" >> int_;
qi::rule<Iterator,space_type> ALL =
qi::omit[ (
VERTEX[REACT(v)] |
VTEX[REACT(vt)] |
VNORM[REACT(vn)] |
VPARAM[REACT(vp)] |
FACE[REACT(f_)] |
LINE[REACT(l_)] |
POINT[REACT(p_)] |
GROUP[REACT(g)] |
OBJECT[REACT(o)] |
MTLLIB[REACT(mtllib)] |
MAPLIB[REACT(maplib)] |
USEMTL[REACT(usemtl)] |
USEMAP[REACT(usemap)] |
TRACE_OBJ[REACT(trace_obj)] |
SHADOW_OBJ[REACT(shadow_obj)] |
BEVEL[REACT(bevel)] |
CINTERP[REACT(cinterp)] |
DINTERP[REACT(dinterp)] |
SMOOTHB[REACT(sB)] |
SMOOTHI[REACT(s)] |
LOD[REACT(lod)] |
// Comments
( '#' >> *(char_) )
) ];
//-*************************************************************************
// BEGIN THE PARSING!
//-*************************************************************************
preReader.start( iName );
std::string str;
size_t lineCount = 1;
while ( std::getline( iStream, str ) )
{
if ( iStream.eof() )
{
break;
}
if ( str.empty() )
{
continue;
}
std::string::const_iterator iter = str.begin();
std::string::const_iterator end = str.end();
try
{
//bool r = client::parseObjLine( iter, end, reader );
bool r = phrase_parse( iter, end, ALL, space );
if ( !r )
{
std::runtime_error exc( "Syntax Error" );
throw( exc );
}
++lineCount;
}
catch ( std::exception &exc )
{
std::stringstream sstr;
sstr << "ERROR: OBJ stream \"" << iName
<< "\": " << std::endl
<< "LINE: " << lineCount << std::endl
<< "---> " << str << std::endl
<< "REASON: " << exc.what() << std::endl;
preReader.error( iName, sstr.str(), lineCount );
return;
}
catch ( ... )
{
std::stringstream sstr;
sstr << "ERROR: OBJ stream \"" << iName
<< "\": " << std::endl
<< "LINE: " << lineCount << std::endl
<< "---> " << str << std::endl;
preReader.error( iName, sstr.str(), lineCount );
return;
}
}
preReader.finish( iName, lineCount );
}
} // End namespace client
//-*****************************************************************************
// PARSE FUNCTION
void ParseOBJ( Reader &iReadInto,
const std::string &iName, std::istream &iStream )
{
client::doParseOBJ( iReadInto, iName, iStream );
}
//-*****************************************************************************
void ParseOBJ( Reader &iReadInto,
const std::string &iFileName )
{
std::ifstream fStr( iFileName.c_str() );
if ( !fStr )
{
ParseReader reader( iReadInto );
reader.start( iFileName );
std::stringstream sstr;
sstr << "ERROR: OBJ stream \"" << iFileName
<< "\": " << std::endl
<< "Couldn't open file: " << iFileName << std::endl;
reader.error( iFileName, sstr.str(), 0 );
return;
}
ParseOBJ( iReadInto, iFileName, fStr );
}
} // End namespace WFObjConvert
} // End namespace AbcClients