OpenGL draw routine

void onDraw(void) {
        glPushMatrix();
        glLoadIdentity();

        //glScaled(10, 10, 10);

        //cout << "num faces:" << mesh->f->size() << endl;


        // Foreach face:
        for(int i = 0; i < mesh->f->size(); ++i) {
            //glBegin(GL_POLYGON);
            glBegin(GL_LINES);
            glColor3f(1.0f, 0.0f, 0.0f);

            // Foreach vertex index:
            for(int j = 0; j < mesh->f->at(i).vertexIndices.size(); ++j) {

                // Support for broken models!
                if(mesh->f->at(i).vertexIndices.at(j)-1 >= mesh->v->size()) {
                    cout << "j:" << j << " index out of bounds! " << (mesh->f->at(i).vertexIndices.at(j)) << " is more than " << mesh->v->size() << endl;
                } else {


                    // Note: The -1 is required b.c obj files start counting at 1, and the computer starts at  0.
                    glVertex3f(
                        mesh->v->at(mesh->f->at(i).vertexIndices.at(j) - 1).x,
                        mesh->v->at(mesh->f->at(i).vertexIndices.at(j) - 1).y,
                        mesh->v->at(mesh->f->at(i).vertexIndices.at(j) - 1).z
                    );
                }
            }

            glEnd();
        }

        glTranslatef(center.x, center.y, center.z);
        glPopMatrix();
    }