Annex 附件

专题

In this annexe we look at the file format and other technical stuff.
在本附录中，我们了解文件格式和其他技术内容。

File format 文件格式

The EV3 Classroom application stores projects with a .lmsp extension. You can remember this as LEGO MINDSTORMS Scratch Program.
EV3 Classroom 应用程序存储扩展名为 .lmsp 的项目。您可以将其记住为 LEGO MINDSTORMS Scratch Program。

When you create your first project, it is called Project 1.lmsp
当您创建第一个项目时，它称为 Project 1.lmsp

The file inspector shows:
文件检查器显示：

Type: EV3 Project Archive
类型： EV3 项目档案
Size: 40 985 bytes (41 KB)
大小：40 985 字节（41 KB）

Open the .lmsp file 打开 .lmsp 文件

The Project 1.lmsp is in fact a ZIP file. You can:
Project 1.lmsp 实际上是一个 ZIP 文件。您可以：

make a copy of it,
复制它，
change the extension from .lmsp to .zip
将扩展名从 .lmsp 更改为 .zip
decompress the ZIP file 解压缩 ZIP 文件

You will get a Project 1 folder with 3 files:
您将获得一个包含 3 个文件的 Project 1 文件夹：

icon.svg
manifest.jsn
scratch.sb3

The icon.svg file

This file contains an image of the program, probably to be displayed in Home > Recent projects.
此文件包含程序的图像，可能显示在主页 > 的“最近的项目 ”中。

The manifest.jsn file

This file contains information about the connection, zoom level, position, etc.
此文件包含有关连接、缩放级别、位置等的信息。

{
    "autoDelete": true,
    "created": "2020-02-07T15:58:32.427Z",
    "hardware": {
        "=h{q!08=bSKjnG!;0#eZ": {
            "address": "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/XHC1@14/XHC1@14000000/PRT2@14200000/EV3@14200000/Xfer data to and from EV3 brick@0/AppleUserUSBHostHIDDevice",
            "description": "",
            "connection": "usb-hid",
            "name": "EV3",
            "type": "ev3",
            "serial": "0016533d0a6c",
            "hubState": {
                "programRunning": false
            },
            "lastConnectedSerial": "0016533d0a6c"
        }
    },
    "id": "lKDY_8BjjFjI",
    "lastsaved": "2020-04-11T16:00:46.620Z",
    "size": 0,
    "name": "Project 1",
    "slotIndex": 0,
    "showAllBlocks": false,
    "state": {
        "playMode": "download",
        "canvasDrawerTab": "monitorTab"
    },
    "version": 1,
    "zoomLevel": 0.8250000000000002,
    "workspaceX": 120.00000000000034,
    "workspaceY": 220.00000000000006,
    "extensions": [
        "ev3events",
        "ev3display"
    ]
}

The scratch.sb3 file

This is a SB3 file, based on the MIT Scratch 3.0 format.
这是一个基于 MIT Scratch 3 格式的 SB3.0 文件 。

You can again: 您可以再次执行以下作：

replace the .sb3 extension with .zip
将 .sb3 扩展名替换为 .zip
decompress the archive 解压缩档案

You will get a folder called scratch which contains:
您将获得一个名为 scratch 的文件夹，其中包含：

svg file
wav file (Meow)
png file
project.json file

This JSON file contains: 此 JSON 文件包含：