Does not open file in Qt

[Carolinabustillo]

Hi!
I'm trying to open and read an .obj file but i am unable to do so.
My code is

My problem is that in the first If it returns false and I don't know why.
My file is in the .qrc and also in the path ("Users/carolina/unchocolatito2").
If someone could help it would be great

[mrjj]

Hi
Are you sure path is correct ?

I feel it should be "/Users/carolina/unchocolatito2"

[Carolinabustillo]

Hi! Thank you for replying me. I have changed what you said but it still doesn't work.

[mrjj]

@Carolinabustillo
Ok not sure what linux you are on, my Users folder is called home

If you open shell
and do
cd /Users/carolina/unchocolatito2
does that work? ( meaning it change to there)

If you put file in a qres file. then find file in Creator, and right click it. You can
the copy path.

And use that ":/xxxx" path where you have todojuntolabio.obj now

[Carolinabustillo]

Thank you so much. My computer is a macOs but I just did what you said about copying the path and now it works.
Now I have this problem.

When I try to click in qvector.h it says that the file doesn't exist or I don't have permission

[mrjj]

@Carolinabustillo
Hi
It says you are using a vector.at(XXX) where xxx is larger than the numbers of items in the list
(or list is empty )

Can you paste the code ? ( the image only shows top of it)
( you can just use the </> button in editor and paste the real code )

[Carolinabustillo]

@mrjj here it is

void QObj3dReader::parseObjFile(const QString &fileName,
                                QStringList &comments,
                                QVector<QOpenGLTriangle3D> &triangles)
{
    comments.clear();
    triangles.clear();

    QFile file(fileName);
    if(file.exists())
    {
        if(file.open(QFile::ReadOnly | QFile::Text))
        {
            QVector<QVector3D> v, vn;
             qDebug() << "se abre";

            while(!file.atEnd())
            {
                QString line = file.readLine().trimmed();
                QStringList lineParts = line.split(QRegularExpression("\\s+"));
                if(lineParts.count() > 0)
                {

                    // if it's a comment
                    if(lineParts.at(0).compare("#", Qt::CaseInsensitive) == 0)
                    {
                        comments.append(line.remove(0, 1).trimmed());
                    }

                    // if it's a vertex position (v)
                    else if(lineParts.at(0).compare("v", Qt::CaseInsensitive) == 0)
                    {
                        v.append(QVector3D(lineParts.at(1).toFloat(),
                                           lineParts.at(2).toFloat(),
                                           lineParts.at(3).toFloat()));
                    }



                    // if it's face data (f)
                    // there's an assumption here that faces are all triangles
                    else if(lineParts.at(0).compare("f", Qt::CaseInsensitive) == 0)
                    {
                        QOpenGLTriangle3D triangle;

                        // get points from v array
                        triangle.p1 = v.at(lineParts.at(1).split("/").at(0).toInt() - 1);
                        triangle.p2 = v.at(lineParts.at(2).split("/").at(0).toInt() - 1);
                        triangle.p3 = v.at(lineParts.at(3).split("/").at(0).toInt() - 1);



                        // get normals from vn array
                        triangle.p1Normal = vn.at(lineParts.at(1).split("/").at(2).toInt() - 1);
                        triangle.p2Normal = vn.at(lineParts.at(2).split("/").at(2).toInt() - 1);
                        triangle.p3Normal = vn.at(lineParts.at(3).split("/").at(2).toInt() - 1);

                        triangles.append(triangle);
                    }

                }
            }

            file.close();
        }
    }
}

[mrjj]

Hi
From a quick look
It dont seem you append anything to the vn vector and then later do
triangle.p1Normal = vn.at(xxx)

So its empty and u try to get element.

[Carolinabustillo]

Thank you so much!!
I was trying different ways to try to open a file that doing copy and paste I forgot some lines of the code. Now it works.

[mrjj]

@Carolinabustillo
Super :)
Notice that
lines such at
lineParts.at(1).split("/").at(2)
will give same kind of error if format is different and split returns an empty list.