TIC-DRAW    --- The data is only uploaded once, on creation
  STREAM-DRAW    --- The data is updated frequently

The CONTENTS should be a vector with element type SINGLE-FLOAT for
VERTEX-BUFFER, or (UNSIGNED-BYTE 32) for ELEMENT-BUFFER types.

See <a href="#GENERIC-FUNCTION%20ORG.SHIRAKUMO.ALLOY.RENDERERS.OPENGL%3AUPDATE-VERTEX-BUFFER" class="xref">UPDATE-VERTEX-BUFFER</a>
See <a href="#GENERIC-FUNCTION%20ORG.SHIRAKUMO.ALLOY.RENDERERS.OPENGL%3AMAKE-VERTEX-ARRAY" class="xref">MAKE-VERTEX-ARRAY</a></pre></div