LinearTransformationScene bug(s)

[bdotsamir]

Description of bug / unexpected behavior

There are a variety of bugs in the LinearTransformationScene. Of note:

• Playing animations on Text, Tex, and MathTex Mobjects causes an error: ValueError: operands could not be broadcast together with shapes (<coordinate pair>) (<coordinate pair>) Todo: test with other text-based Mobjects (number, decimal, etc)
• Running self.wait() if not the final statement in the scene causes an error: TypeError: All submobjects must be of type VMobject

Expected behavior

• Creating text-based Mobjects and playing animations on them should not cause an error.
• self.wait() should not cause an error in the middle of the scene.

How to reproduce the issue

Code for reproducing the problem

• Text, Tex, & MathTex Mobjects fail upon animation:

class LinearTransformationSceneExample(LinearTransformationScene):
    def __init__(self, **kwargs):
        LinearTransformationScene.__init__(
            self,
            show_coordinates=True,
            leave_ghost_vectors=True,
            *kwargs
        )

    def construct(self):
        text = Text("Hello world")
        tex = Tex(r"\LaTeX")
        math_tex = MathTex(r"\pi x_{1} x_{2}")

        group = VGroup(text, tex, math_tex).arrange(DOWN)

        self.play(Write(group)) # <---- FAILS HERE
        # Note that instead of playing, `self.add(group)` works fine.

        matrix = [[1, 1], [0, 1]]
        self.apply_matrix(matrix)
        self.wait()

• Calling self.wait() before the end of the scene fails:

class LinearTransformationSceneExample(LinearTransformationScene):
    def __init__(self, **kwargs):
        LinearTransformationScene.__init__(
            self,
            show_coordinates=True,
            leave_ghost_vectors=True,
            *kwargs
        )

    def construct(self):
        circle = Circle().set_fill(YELLOW, opacity=0.7)

        self.play(Create(circle))

        self.wait(2)

        matrix = [[1, 1], [0, 1]]
        self.apply_matrix(matrix)
        self.wait()

Additional media files

... there are no files to paste. it fails to render. that's what this bug report is about.

Logs

Terminal output

• Text-based mobjects bug: https://pastebin.com/EpAmcWWK
• self.wait() bug: https://pastebin.com/1tWsVWdX

System specifications

System Details

• OS (with version, e.g., Windows 10 v2004 or macOS 10.15 (Catalina)): macOS Sonoma 14.2
• RAM: 16GB
• Python version (python/py/python3 --version): Python 3.11.6
• Installed modules (provide output from pip list):

$ uname -a
Darwin hostname.com 23.2.0 Darwin Kernel Version 23.2.0: Fri Oct 13 09:27:09 PDT 2023; root:xnu-10002.60.54~14/RELEASE_ARM64_T6020 arm64

$ python3 --version
Python 3.11.6

$ pip list
Package                Version
---------------------- -----------
appnope                0.1.3
asttokens              2.4.1
Brotli                 1.1.0
build                  1.0.3
CacheControl           0.13.1
certifi                2023.11.17
cffi                   1.16.0
charset-normalizer     3.3.2
cleo                   2.1.0
click                  8.1.7
click-default-group    1.2.4
cloup                  2.1.2
colorama               0.4.6
comm                   0.1.4
crashtest              0.4.1
Cython                 3.0.5
debugpy                1.8.0
decorator              5.1.1
distlib                0.3.7
dulwich                0.21.6
exceptiongroup         1.2.0
executing              2.0.1
fastjsonschema         2.19.0
filelock               3.13.1
future                 0.18.3
glcontext              2.5.0
idna                   3.5
importlib-metadata     6.8.0
installer              0.7.0
ipykernel              6.26.0
ipython                8.18.0
isosurfaces            0.1.0
jaraco.classes         3.3.0
jedi                   0.19.1
jupyter_client         8.6.0
jupyter_core           5.5.0
keyring                24.3.0
manim                  0.18.0
ManimPango             0.5.0
mapbox-earcut          1.0.1
markdown-it-py         3.0.0
matplotlib-inline      0.1.6
mdurl                  0.1.0
moderngl               5.8.2
moderngl-window        2.4.1
more-itertools         10.1.0
msgpack                1.0.7
multipledispatch       0.6.0
nest-asyncio           1.5.8
networkx               3.2.1
numpy                  1.26.2
packaging              23.2
parso                  0.8.3
pexpect                4.8.0
pickleshare            0.7.5
Pillow                 9.5.0
pip                    23.3.1
pkginfo                1.9.6
platformdirs           3.11.0
poetry                 1.7.1
poetry-core            1.8.1
poetry-plugin-export   1.6.0
prompt-toolkit         3.0.41
psutil                 5.9.5
ptyprocess             0.7.0
pure-eval              0.2.2
pycairo                1.25.1
pycparser              2.21
pydub                  0.25.1
pyglet                 1.5.27
Pygments               2.17.2
pyobjc-core            10.0
pyobjc-framework-Cocoa 10.0
pyproject_hooks        1.0.0
pyrr                   0.10.3
PySocks                1.7.1
python-dateutil        2.8.2
PyYAML                 6.0.1
pyzmq                  25.1.1
rapidfuzz              3.5.2
requests               2.31.0
requests-toolbelt      1.0.0
rich                   13.7.0
SciPy                  1.11.4
screeninfo             0.8.1
setuptools             68.2.2
shellingham            1.5.4
six                    1.16.0
skia-pathops           0.8.0.post1
srt                    3.5.3
stack-data             0.6.2
svgelements            1.9.6
tomli                  2.0.1
tomlkit                0.12.3
tornado                6.3.3
tqdm                   4.66.1
traitlets              5.13.0
trove-classifiers      2023.11.22
typing_extensions      4.8.0
urllib3                2.1.0
virtualenv             20.24.7
watchdog               2.1.6
wcwidth                0.2.12
wheel                  0.41.3
xattr                  0.10.1
zipp                   3.17.0

LaTeX details

• LaTeX distribution (e.g. TeX Live 2020): No clue! Whatever homebrew provided.
• Installed LaTeX packages:

https://i.strange.boats/OHQfaj.txt full list is huge. here's the output.

FFMPEG

Output of ffmpeg -version:

ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with clang version 12.0.0
configuration: --prefix=/Users/ktietz/demo/mc3/conda-bld/ffmpeg_1628925491858/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac --cc=arm64-apple-darwin20.0.0-clang --disable-doc --enable-avresample --enable-gmp --enable-hardcoded-tables --enable-libfreetype --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --enable-pic --enable-pthreads --enable-shared --enable-static --enable-version3 --enable-zlib --enable-libmp3lame --disable-nonfree --enable-gpl --enable-gnutls --disable-openssl --enable-libopenh264 --enable-libx264
libavutil      56. 31.100 / 56. 31.100
libavcodec     58. 54.100 / 58. 54.100
libavformat    58. 29.100 / 58. 29.100
libavdevice    58.  8.100 / 58.  8.100
libavfilter     7. 57.100 /  7. 57.100
libavresample   4.  0.  0 /  4.  0.  0
libswscale      5.  5.100 /  5.  5.100
libswresample   3.  5.100 /  3.  5.100
libpostproc    55.  5.100 / 55.  5.100

Additional comments

Text bugs: calling self.add() does not error
Wait bugs: calling self.wait() as the very last action in the scene does not error.

[bdotsamir]

Realistically this should have been two bugs, but I've been running into a lot of issues with LinearTransformationScene, and I thought it might be easier to create a master-list of sorts.

[MrDiver]

It's fine to have issues with multiple things as long as you do the checklist notation! so that we can keep track of it!

[bdotsamir]

Cool, do the checkmarks I have now work? Or should I make an official to-do list for this issue

[MrDiver]

It's fine as it is!

[JasonGrace2282]

Related #2713 and #3356