BufferAttribute Size for IndexedBufferGeometry
<p>What should be the correct length of other (custom) attributes
if 
<code>length of my position attribute is m</code> and
<code>length of my index attribute is n</code> ?</p>

<p>Example, If I have a rectangular surface to draw;</p>

<pre><code>4 points =&gt; 4*3 = length of positions is 12,
2 triangles =&gt; 2*3 = length of index attribute is 6
</code></pre>

<p>if I need color attribute (rgba) what should be the length of the array?</p>

<pre><code>4 * 4 = 16 or 6*4 = 24 ?
</code></pre>