title: GLSL packing 4 float attributes into vec4
body: <p>I have a question about resource consumption of attribute <code>float</code> in glsl. <br></p>
  
  <p>Does it take as many resources as <code>vec4</code>, or no?<br></p>
  
  <p>I ask this, because uniforms takes <a href="https://stackoverflow.com/a/20775024/1559666">https://stackoverflow.com/a/20775024/1559666</a> (at least, they could)<br></p>
  
  <p>If it is not, then does it makes any sense to pack 4 <code>float</code>'s into one <code>vec4</code> attribute?</p>