i’m making blender model loader for 3d engine,
trying to convert specific lines with floats in it,
ex: (v 1.000000 -1.000000 1.000000),
I try to convert the numbers in file(string) to floats with std::stod() but it doesn’t work,
here’s code:

void mesh::load(fstream &file) // file not important for error
{
    string line = "v 1.000000";
    string n = ""; // substring of search()
    n.resize(34);
    int st = 2; // starting index
    search(line, ' ', st); // makes a substring that end at ' ' or end of string

    // put code to convert n to float

    /*
    while (getline(file,line))
    {
        switch (line.at(0))
        {
        case 'v':
            cout << "n";
        
        }
        
    }
    */
}