Danbias/Code/OysterGraphics/FileLoader/ObjReader.cpp

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#include "OBJReader.h"
#include <sstream>
#include <fstream>
using namespace std;
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OBJReader::OBJReader()
{
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_mPos = 0;
_mNormal = 0;
_mTexel = 0;
}
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OBJReader::~OBJReader()
{
}
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void OBJReader::readOBJFile( wstring fileName )
{
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fstream inStream;
string typeOfData = " ";
float vertexData;
string face1, face2, face3;
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inStream.open( fileName, fstream::in );
if( inStream.is_open() )
{
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while( !inStream.eof() )
{
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inStream >> typeOfData;
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if( typeOfData == "v" )
{
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Oyster::Math::Float3 position;
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inStream >> vertexData;
position.x = vertexData;
inStream >> vertexData;
position.y = vertexData;
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inStream >> vertexData;
position.z = vertexData;
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_mVertexCoord.push_back( position );
}
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else if( typeOfData == "vt" )
{
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Oyster::Math::Float2 texel;
inStream >> vertexData;
texel.x = vertexData;
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inStream >> vertexData;
texel.y = 1 - vertexData;
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_mVertexTexture.push_back( texel );
}
else if( typeOfData == "vn" )
{
Oyster::Math::Float3 normal;
inStream >> vertexData;
normal.x = vertexData;
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inStream >> vertexData;
normal.y = vertexData;
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inStream >> vertexData;
normal.z = vertexData;
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_mVertexNormal.push_back( normal );
}
else if( typeOfData == "f" )
{
inStream >> face1;
stringSplit( face1 );
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addToOBJarray();
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inStream >> face2;
stringSplit( face2 );
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addToOBJarray();
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inStream >> face3;
stringSplit( face3 );
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addToOBJarray();
}
}
}
inStream.close();
}
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//Private functions
void OBJReader::stringSplit( string strToSplit )
{
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char delim = '/';
string vPos, vNormal, vTexel;
stringstream aStream(strToSplit);
getline( aStream, vPos, delim );
getline( aStream, vTexel, delim );
getline( aStream, vNormal );
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_mPos = atoi( vPos.c_str() );
_mNormal = atoi( vNormal.c_str() );
_mTexel = atoi( vTexel.c_str() );
}
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void OBJReader::addToOBJarray()
{
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OBJFormat temp;
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temp._d3VertexCoord = _mVertexCoord.at( _mPos - 1 );
temp._d3VertexNormal = _mVertexNormal.at( _mNormal - 1 );
temp._d3VertexTexture = _mVertexTexture.at( _mTexel - 1 );
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_myOBJ.push_back( temp );
}