// static
bool OBJLoader::parseOBJ( QString objFilename, std::shared_ptr< OBJData > pOBJData )
{
// attempt to read the file
QFile inputFile( objFilename );
if( !( inputFile.open( QIODevice::ReadOnly ) ) )
{
return false;
}
int lineNumber = 0;
QString line = "";
OBJGroup* pCurrentGroup = pOBJData->getGroupByName( "" ); // default group name is the empty string
QTextStream inputTextStream( &inputFile );
QString delim( " " );
line = inputTextStream.readLine();
while( !( line.isNull() ) )
{
if( line != "" )
{
QStringList tokens = line.split( delim, QString::SkipEmptyParts );
if( tokens.size() > 0 )
{
QString commandToken = tokens[ 0 ];
if( commandToken == "mtllib" )
{
QString mtlRelativeFilename = tokens[ 1 ];
QFileInfo objFileInfo( objFilename );
QDir objDir = objFileInfo.dir();
QString mtlAbsoluteFilename = objDir.absolutePath() + "/" + mtlRelativeFilename;
parseMTL( mtlAbsoluteFilename, pOBJData );
}
else if( commandToken == "g" )
{
QString newGroupName;
if( tokens.size() < 2 )
{
fprintf( stderr, "Warning: group has no name, defaulting to ""\nline: %d\n%s",
lineNumber, qPrintable( line ) );
newGroupName = "";
}
else
{
newGroupName = tokens[ 1 ];
}
if( newGroupName != pCurrentGroup->name() )
{
if( pOBJData->containsGroup( newGroupName ) )
{
pCurrentGroup = pOBJData->getGroupByName( newGroupName );
}
else
{
pCurrentGroup = pOBJData->addGroup( newGroupName );
}
}
}
else if( commandToken == "v" )
{
// TODO: error checking on all of these and tear down pOBJData
OBJLoader::parsePosition( lineNumber, line, tokens, pOBJData );
}
else if( commandToken == "vt" )
{
OBJLoader::parseTextureCoordinate( lineNumber, line, tokens, pOBJData );
}
else if( commandToken == "vn" )
{
OBJLoader::parseNormal( lineNumber, line, tokens, pOBJData );
}
else if( commandToken == "usemtl" )
{
pCurrentGroup->addMaterial( tokens[ 1 ] );
}
else if( commandToken == "f" || commandToken == "fo" )
{
OBJLoader::parseFace( lineNumber, line,
tokens, pCurrentGroup );
}
}
}
++lineNumber;
line = inputTextStream.readLine();
}
return true;
}
// static
bool OBJLoader::parseOBJ( const std::string& objFilename, OBJData* pOBJData )
{
// Attempt to read the file.
std::ifstream inputFile( objFilename );
if (inputFile.fail())
{
return false;
}
int lineNumber = 0;
std::string line = "";
// Default group name is the empty string.
OBJGroup& currentGroup = pOBJData->addGroup( "" );
// Default material name is the empty string.
pOBJData->addMaterial( "" );
const std::string& delim( " " );
while( std::getline( inputFile, line ) )
{
if( line == "" ||
pystring::startswith( line, "#" ) ||
pystring::startswith( line, "//" ) )
{
++lineNumber;
continue;
}
std::vector< std::string > tokens;
pystring::split( line, tokens, delim );
if( tokens.size() == 0 )
{
++lineNumber;
continue;
}
const std::string& commandToken = tokens[ 0 ];
if( commandToken == "mtllib" )
{
const std::string& mtlRelativeFilename = tokens[ 1 ];
std::string dirname = pystring::os::path::dirname( objFilename );
std::string mtlFilename =
pystring::os::path::join( dirname, mtlRelativeFilename );
parseMTL( mtlFilename, pOBJData );
}
else if( commandToken == "g" )
{
std::string newGroupName;
if( tokens.size() < 2 )
{
fprintf( stderr,
"Warning: group has no name, defaulting to ""\n"
"line %d: %s",
lineNumber, line.c_str() );
newGroupName = "";
}
else
{
newGroupName = line.substr( 2 );
}
if( newGroupName != currentGroup.name() )
{
if( pOBJData->containsGroup( newGroupName ) )
{
currentGroup = pOBJData->getGroupByName( newGroupName );
}
else
{
currentGroup = pOBJData->addGroup( newGroupName );
}
}
}
else if( commandToken == "v" )
{
// TODO: error checking on all of these.
OBJLoader::parsePosition( lineNumber, line, tokens, pOBJData );
}
else if( commandToken == "vt" )
{
OBJLoader::parseTextureCoordinate( lineNumber, line, tokens,
pOBJData );
}
else if( commandToken == "vn" )
{
OBJLoader::parseNormal( lineNumber, line, tokens, pOBJData );
}
else if( commandToken == "usemtl" )
{
currentGroup.addMaterial( tokens[ 1 ] );
}
else if( commandToken == "f" || commandToken == "fo" )
{
OBJLoader::parseFace( lineNumber, line,
tokens, currentGroup );
}
++lineNumber;
}
return true;
}
