bool ObjModel::LoadOBJ(const wchar_t* fileName)
{
wprintf_s(L"Loading Obj from: %s\n", fileName);
std::ifstream fileStream;
int fileSize = 0;
fileStream.open(fileName, std::ifstream::in);
wprintf_s(L"fileStream.open()\n");
if (fileStream.is_open() == false)
return false;
wprintf_s(L"fileStream.is_open()\n");
fileStream.seekg(0, std::ios::end);
fileSize = (int)fileStream.tellg();
fileStream.seekg(0, std::ios::beg);
if (fileSize <= 0)
return false;
char* buffer = new char[fileSize];
if (buffer == 0)
return false;
memset(buffer, '\0', fileSize);
TokenStream tokenStream;
TokenStream lineStream;
TokenStream faceStream;
std::string tempLine;
std::string token;
fileStream.read(buffer, fileSize);
tokenStream.SetTokenStream(buffer);
delete[] buffer;
tokenStream.ResetStream();
std::vector<float> verts, norms, texC;
std::vector<int> faces;
char lineDelimiters[2] = { '\n', ' ' };
while (tokenStream.MoveToNextLine(&tempLine))
{
lineStream.SetTokenStream((char*)tempLine.c_str());
tokenStream.GetNextToken(0, 0, 0);
if (!lineStream.GetNextToken(&token, lineDelimiters, 2))
continue;
if (strcmp(token.c_str(), "v") == 0)
{
lineStream.GetNextToken(&token, lineDelimiters, 2);
verts.push_back((float)atof(token.c_str()));
lineStream.GetNextToken(&token, lineDelimiters, 2);
verts.push_back((float)atof(token.c_str()));
lineStream.GetNextToken(&token, lineDelimiters, 2);
verts.push_back((float)atof(token.c_str()));
}
else if (strcmp(token.c_str(), "vn") == 0)
{
lineStream.GetNextToken(&token, lineDelimiters, 2);
norms.push_back((float)atof(token.c_str()));
lineStream.GetNextToken(&token, lineDelimiters, 2);
norms.push_back((float)atof(token.c_str()));
lineStream.GetNextToken(&token, lineDelimiters, 2);
norms.push_back((float)atof(token.c_str()));
}
else if (strcmp(token.c_str(), "vt") == 0)
{
lineStream.GetNextToken(&token, lineDelimiters, 2);
texC.push_back((float)atof(token.c_str()));
lineStream.GetNextToken(&token, lineDelimiters, 2);
texC.push_back((float)atof(token.c_str()));
}
else if (strcmp(token.c_str(), "f") == 0)
{
char faceTokens[3] = { '\n', ' ', '/' };
std::string faceIndex;
faceStream.SetTokenStream((char*)tempLine.c_str());
faceStream.GetNextToken(0, 0, 0);
for (int i = 0; i < 3; i++)
{
faceStream.GetNextToken(&faceIndex, faceTokens, 3);
faces.push_back((int)atoi(faceIndex.c_str()));
faceStream.GetNextToken(&faceIndex, faceTokens, 3);
faces.push_back((int)atoi(faceIndex.c_str()));
faceStream.GetNextToken(&faceIndex, faceTokens, 3);
faces.push_back((int)atoi(faceIndex.c_str()));
}
}
else if (strcmp(token.c_str(), "#") == 0)
{
int a = 0;
int b = a;
}
token[0] = '\0';
}
int vIndex = 0, nIndex = 0, tIndex = 0, iIndex = 0;
int numFaces = (int)faces.size() / 9;
m_totalVerts = numFaces * 3;
m_vertices = new float[m_totalVerts * 3];
wprintf_s(L"FACES.SIZE: %d\nNUM FACES: %d\n", faces.size(), numFaces);
// Indices from faces
// There will be doubles in these
// Indices should be in range of 0 -> m_totalUniqueVerts-1
m_indices = new int[m_totalVerts];
m_normalIndices = new int[m_totalVerts];
m_texIndices = new int[m_totalVerts];
m_totalIndices = m_totalVerts;
m_uniqueVerts = new float[verts.size()];
m_totalUniqueVerts = verts.size();
m_uniqueNormals = new float[norms.size()];
m_totalUniqueNormals = norms.size();
m_uniqueTexCoords = new float[texC.size()];
m_totalUniqueTexCoords = texC.size();
for (int i = 0; i < norms.size(); i++)
{
m_uniqueNormals[i] = norms[i];
}
for (int i = 0; i < verts.size(); i++)
{
m_uniqueVerts[i] = verts[i];
}
for (int i = 0; i < texC.size(); i++)
{
m_uniqueTexCoords[i] = texC[i];
}
if ((int)norms.size() != 0)
{
m_normals = new float[m_totalVerts * 3];
}
if ((int)texC.size() != 0)
{
m_texCoords = new float[m_totalVerts * 2];
}
for (int f = 0; f < (int)faces.size(); f += 3)
{
m_indices[iIndex] = faces[f]-1;
m_texIndices[iIndex] = faces[f + 1] - 1;
m_normalIndices[iIndex] = faces[f + 2] - 1;
iIndex++;
m_vertices[vIndex + 0] = verts[(faces[f + 0] - 1) * 3 + 0];
m_vertices[vIndex + 1] = verts[(faces[f + 0] - 1) * 3 + 1];
m_vertices[vIndex + 2] = verts[(faces[f + 0] - 1) * 3 + 2];
vIndex += 3;
if (m_texCoords)
{
m_texCoords[tIndex + 0] = texC[(faces[f + 1] - 1) * 2 + 0];
m_texCoords[tIndex + 1] = texC[(faces[f + 1] - 1) * 2 + 1];
tIndex += 2;
}
if (m_normals)
{
m_normals[nIndex + 0] = norms[(faces[f + 2] - 1) * 3 + 0];
m_normals[nIndex + 1] = norms[(faces[f + 2] - 1) * 3 + 1];
m_normals[nIndex + 2] = norms[(faces[f + 2] - 1) * 3 + 2];
nIndex += 3;
}
}
verts.clear();
norms.clear();
texC.clear();
faces.clear();
return true;
}
