static inline pugi::xml_node& currentMaterial() {
return currentMaterial(nullptr);
}
//MTL PARSER INSPIRED FROM KIXOR.NET "objloader" (http://www.kixor.net/dev/objloader/)
bool ccMaterialSet::ParseMTL(QString path, const QString& filename, ccMaterialSet &materials, QStringList& errors)
{
//open mtl file
QString fullPathFilename = path + QString('/') + filename;
QFile file(fullPathFilename);
if (!file.open(QFile::ReadOnly))
{
errors << QString("Error reading file: %1").arg(filename);
return false;
}
//update path (if the input filename has already a relative path)
path = QFileInfo(fullPathFilename).absolutePath();
QTextStream stream(&file);
QString currentLine = stream.readLine();
unsigned currentLineIndex = 0;
ccMaterial::Shared currentMaterial(0);
while( !currentLine.isNull() )
{
++currentLineIndex;
QStringList tokens = currentLine.split(QRegExp("\\s+"),QString::SkipEmptyParts);
//skip comments & empty lines
if( tokens.empty() || tokens.front().startsWith('/',Qt::CaseInsensitive) || tokens.front().startsWith('#',Qt::CaseInsensitive) )
{
currentLine = stream.readLine();
continue;
}
//start material
if (tokens.front() == "newmtl")
{
//push the previous material (if any)
if (currentMaterial)
{
materials.addMaterial(currentMaterial);
currentMaterial = ccMaterial::Shared(0);
}
// get the name
QString materialName = currentLine.mid(7).trimmed(); //we must take the whole line! (see OBJ filter)
if (materialName.isEmpty())
materialName = "undefined";
currentMaterial = ccMaterial::Shared(new ccMaterial(materialName));
}
else if (currentMaterial) //we already have a "current" material
{
//ambient
if (tokens.front() == "Ka")
{
if (tokens.size() > 3)
{
ccColor::Rgbaf ambient( tokens[1].toFloat(),
tokens[2].toFloat(),
tokens[3].toFloat(),
1.0f);
currentMaterial->setAmbient(ambient);
}
}
//diff
else if (tokens.front() == "Kd")
{
if (tokens.size() > 3)
{
ccColor::Rgbaf diffuse( tokens[1].toFloat(),
tokens[2].toFloat(),
tokens[3].toFloat(),
1.0f);
currentMaterial->setDiffuse(diffuse);
}
}
//specular
else if (tokens.front() == "Ks")
{
if (tokens.size() > 3)
{
ccColor::Rgbaf specular(tokens[1].toFloat(),
tokens[2].toFloat(),
tokens[3].toFloat(),
1.0f);
currentMaterial->setSpecular(specular);
}
}
//shiny
else if (tokens.front() == "Ns")
{
if (tokens.size() > 1)
currentMaterial->setShininess(tokens[1].toFloat());
}
//transparent
else if (tokens.front() == "d" || tokens.front() == "Tr")
{
if (tokens.size() > 1)
currentMaterial->setTransparency(tokens[1].toFloat());
}
//reflection
else if (tokens.front() == "r")
{
//ignored
//if (tokens.size() > 1)
// currentMaterial->reflect = tokens[1].toFloat();
}
//glossy
else if (tokens.front() == "sharpness")
{
//ignored
//if (tokens.size() > 1)
// currentMaterial->glossy = tokens[1].toFloat();
}
//refract index
else if (tokens.front() == "Ni")
{
//ignored
//if (tokens.size() > 1)
// currentMaterial->refract_index = tokens[1].toFloat();
}
// illumination type
else if (tokens.front() == "illum")
{
//ignored
}
// texture map
else if (tokens.front() == "map_Ka"
|| tokens.front() == "map_Kd"
|| tokens.front() == "map_Ks")
{
//DGM: in case there's hidden or space characters at the beginning of the line...
int shift = currentLine.indexOf("map_K",0);
QString textureFilename = (shift + 7 < currentLine.size() ? currentLine.mid(shift+7).trimmed() : QString());
QString fullTexName = path + QString('/') + textureFilename;
if (!currentMaterial->loadAndSetTexture(fullTexName))
{
errors << QString("Failed to load texture file: %1").arg(fullTexName);
}
}
else
{
errors << QString("Unknown command '%1' at line %2").arg(tokens.front()).arg(currentLineIndex);
}
}
currentLine = stream.readLine();
}
file.close();
//don't forget to push the last material!
if (currentMaterial)
materials.addMaterial(currentMaterial);
return true;
}
