/**
   * Get the value of a field. If the field is a primitive type, it will return a class representing
   * the value. For arrays or nodes it will return the instance directly.
   *
   * @param index The index of the field to change.
   * @return The class representing the field value
   * @throws InvalidFieldException The field index is not known
   */
  public VRMLFieldData getFieldValue(int index) throws InvalidFieldException {
    VRMLFieldData fieldData = fieldLocalData.get();

    switch (index) {
      case FIELD_SPEED:
        fieldData.clear();
        fieldData.floatValue = vfSpeed;
        fieldData.dataType = VRMLFieldData.FLOAT_DATA;
        break;

      case FIELD_REPEAT_S:
        fieldData.clear();
        fieldData.booleanValue = vfRepeatS;
        fieldData.dataType = VRMLFieldData.BOOLEAN_DATA;
        break;

      case FIELD_REPEAT_T:
        fieldData.clear();
        fieldData.booleanValue = vfRepeatT;
        fieldData.dataType = VRMLFieldData.BOOLEAN_DATA;
        break;

      case FIELD_URL:
        fieldData.clear();
        fieldData.stringArrayValue = vfURL;
        fieldData.dataType = VRMLFieldData.STRING_ARRAY_DATA;
        fieldData.numElements = vfURL.length;
        break;

      case FIELD_DURATION:
        fieldData.clear();
        fieldData.doubleValue = vfDuration;
        fieldData.dataType = VRMLFieldData.DOUBLE_DATA;
        break;

      case FIELD_IS_ACTIVE:
        fieldData.clear();
        fieldData.booleanValue = vfIsActive;
        fieldData.dataType = VRMLFieldData.BOOLEAN_DATA;
        break;

      case FIELD_TEXTURE_PROPERTIES:
        if (vrmlMajorVersion <= 3 && vrmlMinorVersion < 2) {
          InvalidFieldException ife = new InvalidFieldException(TEXPROPS_VERSION_MSG);
          ife.setFieldName("TextureProperties");
          throw ife;
        }

        fieldData.clear();
        if (pTextureProperties != null) fieldData.nodeValue = pTextureProperties;
        else fieldData.nodeValue = vfTextureProperties;
        fieldData.dataType = VRMLFieldData.NODE_DATA;
        break;

      default:
        super.getFieldValue(index);
    }

    return fieldData;
  }
  /**
   * Get the value of a field. If the field is a primitive type, it will return a class representing
   * the value. For arrays or nodes it will return the instance directly.
   *
   * @param index The index of the field to change.
   * @return The class representing the field value
   * @throws InvalidFieldException The field index is not known
   */
  public VRMLFieldData getFieldValue(int index) throws InvalidFieldException {
    VRMLFieldData fieldData = fieldLocalData.get();

    switch (index) {
      case FIELD_BOUNDARY_COLOR:
        fieldData.clear();
        fieldData.floatArrayValue = vfBoundaryColor;
        fieldData.dataType = VRMLFieldData.FLOAT_ARRAY_DATA;
        fieldData.numElements = 1;
        break;

      case FIELD_BOUNDARY_WIDTH:
        fieldData.clear();
        fieldData.intValue = vfBoundaryWidth;
        fieldData.dataType = VRMLFieldData.INT_DATA;
        break;

      case FIELD_MAGNIFICATION_FILTER:
        fieldData.clear();
        fieldData.stringValue = vfMagnificationFilter;
        fieldData.dataType = VRMLFieldData.STRING_DATA;
        break;

      case FIELD_MINIFICATION_FILTER:
        fieldData.clear();
        fieldData.stringValue = vfMinificationFilter;
        fieldData.dataType = VRMLFieldData.STRING_DATA;
        break;

      case FIELD_GENERATE_MIPMAPS:
        fieldData.clear();
        fieldData.booleanValue = vfGenerateMipMaps;
        fieldData.dataType = VRMLFieldData.BOOLEAN_DATA;
        break;

      case FIELD_ANISOTROPIC_MODE:
        fieldData.clear();
        fieldData.stringValue = vfAnisotropicMode;
        fieldData.dataType = VRMLFieldData.STRING_DATA;
        break;

      case FIELD_ANISOTROPIC_FILTER_DEGREE:
        fieldData.clear();
        fieldData.floatValue = vfAnisotropicFilterDegree;
        fieldData.dataType = VRMLFieldData.FLOAT_DATA;
        break;

      default:
        return (super.getFieldValue(index));
    }

    return fieldData;
  }