Method astArrayExpression

src/backend/web-gl/function-node.js:1500–1524

* @desc Parses the abstract syntax tree for *Array* Expression * @param {Object} arrNode - the AST object to parse * @param {Array} retArr - return array string * @returns {Array} the append retArr

(arrNode, retArr)

   * @returns {Array} the append retArr
   */
  astArrayExpression(arrNode, retArr) {
    const returnType = this.getType(arrNode);

    const arrLen = arrNode.elements.length;

    switch (returnType) {
      case 'Matrix(2)':
      case 'Matrix(3)':
      case 'Matrix(4)':
        retArr.push(`mat${arrLen}(`);
        break;
      default:
        retArr.push(`vec${arrLen}(`);
    }
    for (let i = 0; i < arrLen; ++i) {
      if (i > 0) {
        retArr.push(', ');
      }
      const subNode = arrNode.elements[i];
      this.astGeneric(subNode, retArr)
    }
    retArr.push(')');

    return retArr;
  }

  memberExpressionXYZ(x, y, z, retArr) {
    if (z) {