title: glm translate matrix does not translate the vector
body: <p>I have crossed some very simple error while started using glm (in VS2010). I have got this short code:</p>
  
  <pre><code>glm::mat4 translate = glm::translate(glm::mat4(1.f), glm::vec3(2.f, 0.f, 0.f));
  glm::vec4 vector(1.f,1.f,1.f,0.f);
  glm::vec4 transformedVector = translate * vector;
  </code></pre>
  
  <p>The result of the transformedVector is the same as its original value (1.f, 1.f, 1.f, 0.f). I do not know what i am missing here. 
  I have tried the rotation matrix and that is working fine, the point is transformated correctly.</p>
  
  <pre><code>glm::mat4 rotate = glm::rotate(glm::mat4(1.f), 90.f, glm::vec3(0.f, 0.f, 1.f));
  glm::vec4 vector(1.f, 1.f, 1.f, 0.f);
  glm::vec4 transformedVector = rotate * vector;
  </code></pre>
  
  <p>Ok, I have found out the problem. I would like to translate a vertex not a vector, in this case I had to set the w value to 1.</p>