Viết Tập Lệnh & Tính Bảo An (Scripting & Security)

The ability to include Python scripts within blend-files is valuable for advanced tasks such as rigging and automation. However, it poses a security risk since Python does not restrict what a script can do. Therefore, you should only run scripts from sources you know and trust. Automatic execution is disabled by default; however, some blend-files need this to function properly.

When a blend-file tries to execute a script and is not allowed, a dialog will appear. In it, you can choose to Allow Execution or to Ignore the scripts.

Một cảnh báo về Auto-run trong tiêu đề của Trình Biên Soạn Thông Tin.

Tập Lệnh trong Tập Tin Blend (Scripts in Blend-Files)

Thi Hành Tự Động (Auto Execution)

Here are the different ways blend-files may automatically run scripts.

Khối Văn Bản được Đăng Ký (Registered Text-Blocks)

A text data-block can have its Register option enabled which means it will load on start.

Điều Vận Hoạt Họa (Animation Drivers)

Python expressions can be used to Drive values and are often used in more advanced rigs and animations.

Thi Hành Thủ Công (Manual Execution)

There are other ways scripts in a blend-file may execute that require user interaction (therefore will run even when auto execution is off), but you should be aware that this is the case since it is not necessarily obvious.

• Running a script in the Text editor.

• Rendering with Freestyle, because Freestyle uses scripts to control line styles.

Điều Khiển sự Thi Hành của Tập Lệnh (Controlling Script Execution)

Blender provides a number of ways to control whether scripts from a blend-file are allowed to automatically execute.

First, the File Browser has the option Trusted Source which you can use on a case-by-case basis to control auto execution. Since you may forget to set this, or may open a file without going through the File Browser, you can change the default (described next).

Sắp Đặt Mặc Định (Setting Defaults)

In the Preferences, there is the toggle to Auto Run Python Scripts. This means the Trusted Source option in the File Browser will be enabled by default, and scripts can run when blend-files are loaded without using the File Browser. Once enabled you have the option to exclude certain directories; a typical configuration would be to trust all paths except for the download directory.

The Auto Run Python Scripts checkbox.

Dòng Lệnh (Command Line)

You may want to perform batch rendering or some other task from the command line, running Blender without an interface. In this case, the Preferences are still used but you may want to override them:

• Enable with -y or --enable-autoexec

• Disable with -Y or --disable-autoexec

Ví Dụ (Example)

To render an animation in background mode, allowing drivers and other scripts to run:

blender --background --enable-autoexec my_movie.blend --render-anim

Ghi chú

These command-line arguments can be used to start a regular Blender instance and will still override the Preferences.