2021/9/16MANIM笔记

安装教程太多我就不多说了

安装多让大家安装manimgl

image-20210916200140316

manimgl或者manim render都可以。

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Usage: python -m manim render [OPTIONS] FILE [SCENE_NAMES]...

  Render SCENE(S) from the input FILE.

  FILE is the file path of the script.

  SCENES is an optional list of scenes in the file.

Global options:
  -c, --config_file TEXT          Specify the configuration file to use for
                                  render settings.
  --custom_folders                Use the folders defined in the
                                  [custom_folders] section of the config file
                                  to define the output folder structure.
  --disable_caching               Disable the use of the cache (still
                                  generates cache files).
  --flush_cache                   Remove cached partial movie files.
  --tex_template TEXT             Specify a custom TeX template file.
  -v, --verbosity [DEBUG|INFO|WARNING|ERROR|CRITICAL]
                                  Verbosity of CLI output. Changes ffmpeg log
                                  level unless 5+.
  --notify_outdated_version / --silent
                                  Display warnings for outdated installation.
  --enable_gui                    Enable GUI interaction.
  --gui_location TEXT             Starting location for the GUI.
  --fullscreen                    Expand the window to its maximum possible
                                  size.

Output options:
  -o, --output_file TEXT          Specify the filename(s) of the rendered
                                  scene(s).
  -0, --zero_pad INTEGER RANGE    Zero padding for PNG file names.  [0<=x<=9]
  --write_to_movie                Write to a file.
  --media_dir PATH                Path to store rendered videos and latex.
  --log_dir PATH                  Path to store render logs.
  --log_to_file                   Log terminal output to file.

Render Options:
  -n, --from_animation_number TEXT
                                  Start rendering from n_0 until n_1. If n_1
                                  is left unspecified, renders all scenes
                                  after n_0.
  -a, --write_all                 Render all scenes in the input file.
  --format [png|gif|mp4|webm|mov]
  -s, --save_last_frame
  -q, --quality [l|m|h|p|k]       Render quality at the follow resolution
                                  framerates, respectively: 854x480 30FPS,
                                  1280x720 30FPS, 1920x1080 60FPS, 2560x1440
                                  60FPS, 3840x2160 60FPS
  -r, --resolution TEXT           Resolution in (W,H) for when 16:9 aspect
                                  ratio isn't possible.
  --fps, --frame_rate FLOAT       Render at this frame rate.
  --renderer [cairo|opengl|webgl]
                                  Select a renderer for your Scene.
  --use_opengl_renderer           Render scenes using OpenGL (Deprecated).
  --use_webgl_renderer            Render scenes using the WebGL frontend
                                  (Deprecated).
  --webgl_renderer_path PATH      The path to the WebGL frontend.
  -g, --save_pngs                 Save each frame as png (Deprecated).
  -i, --save_as_gif               Save as a gif (Deprecated).
  -s, --save_last_frame           Save last frame as png (Deprecated).
  -t, --transparent               Render scenes with alpha channel.
  --use_projection_fill_shaders   Use shaders for OpenGLVMobject fill which
                                  are compatible with transformation matrices.
  --use_projection_stroke_shaders
                                  Use shaders for OpenGLVMobject stroke which
                                  are compatible with transformation matrices.

Ease of access options:
  --progress_bar [display|leave|none]
                                  Display progress bars and/or keep them
                                  displayed.
  -p, --preview                   Preview the Scene's animation. OpenGL does a
                                  live preview in a popup window. Cairo opens
                                  the rendered video file in the system
                                  default media player.
  -f, --show_in_file_browser      Show the output file in the file browser.
  --jupyter                       Using jupyter notebook magic.

Other options:
  --help                          Show this message and exit.

  Made with <3 by Manim Community developers.

上面是新版manim render的用法，老款用的是

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python -m manim加命令。

现在要用manim render.

image-20210916202903307

可以用-p后面不加命令，自动保存为mp4格式，我加上了transparent(透明的)，播放时可能会有透明背景，并且文件格式为.mov，不过需要特定的播放器。image-20210916210126544

加-n 数字，表示从第几个图像开始保存显示。

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class WriteText(Scene):
    def construct(self):
        text = Text('A Text')
        text.to_edge(UP)
        text.move_to(0 * UP + 0.1 * RIGHT)
        circle = Circle(radius=3, color=GREEN);
        self.play(Write(text))
        self.wait(5)
        self.remove(text)
        self.wait(1);
        self.play(Create(circle));
        self.play(FadeOut(circle));

学习了一些方法。比如画圆，平移move_to等，明天继续。

我们运行动画后发现对Text文字部分只运行了最后一句，也就是move_to

并没有运行to_edge说明play只运行一个object的最后状态。

我们要找一个能够运行对一个object的所有方法。

move_to的区别在于，next_to表示的是边界的距离，而不是中心距离

例如：

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text1.next_to(text2, LEFT, buff=2)

旋转

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rotate(PI / 4)

用作对象的方法。

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someObject.flip(DIRECTION)#按照矢量方向旋转180度。

再看看同时播放多种动作：

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class ChangeColorAndSizeAnimation(Scene):
    def construct(self):
        text = Text("Text")
        text.scale(2)
        text.shift(LEFT*2)
        self.play(Write(text))
        self.wait()
        self.play(
            text.shift, RIGHT*2,
            text.scale, 2,
            text.set_color, RED,
            run_time=2#这个run_time要作为最后一个参数
            
        )
         self.wait()