src/texture.js
/**
   * Bind the texture to a particular texture index
   *
   * @param  {Number} index Texture index to bind to
   * @return {void}
   */
Bind the texture to a particular texture index
@param  {Number} index Texture index to bind to
@return {void}
Bind the texture to a particular texture index @param { Number } index Texture index to bind to @return { void }
use(index) {
    var gl = this._gl;
    index = index || 0;
    gl.bindTexture(gl.TEXTURE_2D, this.texture);
    gl.activeTexture(gl.TEXTURE0 + index);
  }
use ( index ) { var gl = this . _gl ; index = index || 0 ; gl . bindTexture ( gl . TEXTURE_2D , this . texture ) ; gl . activeTexture ( gl . TEXTURE0 + index ) ; }
Bind the texture to a particular texture index
 @param  {Number} index Texture index to bind to
 @return {void}
Bind the texture to a particular texture index @param { Number } index Texture index to bind to @return { void }