docs: function() {
  		this.gl = this.context.gl;
  		var gl = this.gl;
  		this.vertexBuffer = gl.createBuffer();
  
  		//ignore index buffer if we haven't specified any
  		this.indexBuffer = this.numIndices > 0
  					? gl.createBuffer()
  					: null;
  
  		this.dirty = true;
  	}