Hi everyone, I've been developing a 3D creator but I'm still stuck in the first stages since I haven't been able to draw with VBO.

This is a piece of my glwidget.cpp code, where all the objects are drawn
Qt Code: 
  1. void GLWidget::initializeGL()
  2. {
  3.     #define PROGRAM_VERTEX_ATTRIBUTE 0
  4.     #define PROGRAM_NORMALS_ATTRIBUTE 1
  5.  
  6.     //glEnable(GL_DEPTH_TEST);
  7.     //glEnable(GL_CULL_FACE);
  8.  
  9.  
  10.     vShader= new QGLShader (QGLShader::Vertex, this);
  11.     vShader->compileSourceFile("../src/shaders/editorVshader.glsl");
  12.  
  13.     fShader= new QGLShader (QGLShader::Fragment, this);
  14.     fShader->compileSourceFile("../src/shaders/editorFshader.glsl");
  15.  
  16.     editor= new QGLShaderProgram (this);
  17.     editor->addShader(vShader);
  18.     editor->addShader(fShader);
  19.     editor->bindAttributeLocation("vertices", PROGRAM_VERTEX_ATTRIBUTE);
  20.     editor->bindAttributeLocation("normals", PROGRAM_NORMALS_ATTRIBUTE);
  21.     editor->link();
  22.     editor->bind();
  23. }
  24.  
  25. void GLWidget::paintGL()
  26. {
  27.     glClearColor(0.4765625, 0.54296875, 0.6171875, 1.0);
  28.     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  29. /*
  30.     glLoadIdentity();
  31.     glTranslatef(0.0f, 0.0f, -10.0f);
  32. */
  33.  
  34.     editor->setUniformValue("projectMatrix", controller->getProjectionMatrix());
  35.     editor->setUniformValue("viewMatrix", controller->getViewMatrix());
  36.  
  37.  
  38.     /** Ahora para las operaciones especificas de cada objeto **/
  39.  
  40.     for (int i=0; i<Objects.size(); i++)
  41.     {
  42.         Objects[i].modelmatrix.scale(1.0, 1.0, 1.0);
  43.         Objects[i].modelmatrix.rotate(1.0, 0.0, 0.0, 1.0);
  44.         editor->setUniformValue("modelMatrix", Objects.at(i).modelmatrix);
  45.  
  46.         glEnableClientState(GL_VERTEX_ARRAY);
  47.         Objects[i].vertexbuffer->bind();
  48.         glVertexPointer(3, GL_FLOAT, 0, Objects.at(i).indexed_vertices.data());
  49.         editor->enableAttributeArray("vertices");
  50.         editor->setAttributeBuffer("vertices", GL_FLOAT, 0, Objects[i].indexed_vertices.size() * sizeof(vertex)); // (PROGRAM_VERTEX_ATTRIBUTE, Objects[i].vertices.data());
  51. /*
  52.         Objects[i].normalbuffer.bind();
  53.         //glVertexPointer(3, GL_FLOAT, 3, Objects.at(i).indexed_normals.data());
  54.         glEnableClientState(GL_NORMAL_ARRAY);
  55.         editor->enableAttributeArray(PROGRAM_NORMALS_ATTRIBUTE);
  56.         editor->setAttributeBuffer (PROGRAM_NORMALS_ATTRIBUTE, GL_FLOAT, 0, Objects[i].indexed_normals.size() * sizeof(vertex));*/
  57.  
  58.         //glDrawArrays(GL_QUADS, 0, Objects[i].vertices.size());
  59.         Objects[i].elementbuffer->bind();
  60.         glDrawElements(GL_QUADS, Objects[i].indices.size(), GL_UNSIGNED_SHORT, (void*)0);
  61.     }
  62. }
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It explodes when it tries to execute the glDrawElements instruction. I've been tracking down the problem but I can't find what's wrong. I'm even doubting about the right way to use QGLBuffer in Qt. Can anyone help me?