behackl
commented
3 years ago Thanks for your report! Turns out the issue is that \sqrt is not always handled correctly (in particular in the case where the TeX string is split at the first symbol under the square root (you can check that \sqrt{x(C + B)(C - B)} renders correctly.
I've proposed a fix in #1527.
Description of bug / unexpected behavior
TransformMatchingTexdoes not work as expected when transforming from oneMathTexobject to an other which contains a LatexsqrtoperatorExpected behavior
How to reproduce the issue
``
Code for reproducing the problem. Adapted and simplfied version from 3B1B manim's TExTransformExample in his repository, https://3b1b.github.io/manim/getting_started/example_scenes.html
```py class TexTransformExampleSimple(Scene): def construct(self): to_isolate = ["A", "B", "C", "=", "(", ")"] lines = VGroup( MathTex("A^2 = (C + B)(C - B)", substrings_to_isolate=to_isolate), MathTex("A = \\sqrt{(C + B)(C - B)}", substrings_to_isolate=to_isolate) ) lines.arrange(DOWN, buff=LARGE_BUFF) self.add(lines[0]) self.play(TransformMatchingTex(lines[0], lines[1], transform_mismatches=True), run_time=2) self.wait() ```Additional media files
Images/GIFs
Logs
Terminal output
``` Manim Community v0.6.0 [05/16/21 23:42:15] DEBUG Animation received extra kwargs: {'final_alpha_value': 0} animation.py:50 DEBUG Animation received extra kwargs: {'final_alpha_value': 0} animation.py:50 DEBUG Animation received extra kwargs: {'final_alpha_value': 0} animation.py:50 DEBUG Hashing ... hashing.py:240 DEBUG Hashing done in 0.333753 s. hashing.py:253 DEBUG Hash generated : 450974505_3223459120_2098723146 hashing.py:257 DEBUG List of the first few animation hashes of the scene: ['450974505_3223459120_2098723146'] cairo_renderer.py:108 [05/16/21 23:42:21] INFO Animation 0 : Partial movie file written in {'/path/to/project/mani scene_file_writer.py:401 m/media/videos/scene/1080p60/partial_movie_files/TexTransformExampleSimple/450974505_3223459120_2098 723146.mp4'} DEBUG Animation with empty mobject animation.py:62 DEBUG Hashing ... hashing.py:240 DEBUG Hashing done in 0.196513 s. hashing.py:253 DEBUG Hash generated : 2788726626_1615497636_227427286 hashing.py:257 INFO Animation 1 : Using cached data (hash : 2788726626_1615497636_227427286) cairo_renderer.py:100 DEBUG List of the first few animation hashes of the scene: ['450974505_3223459120_2098723146', cairo_renderer.py:108 '2788726626_1615497636_227427286'] DEBUG Partial movie files to combine (2 files): ['/path/to/project/manim/ scene_file_writer.py:450 media/videos/scene/1080p60/partial_movie_files/TexTransformExampleSimple/450974505_3223459120_209872 3146.mp4', '/path/to/project/manim/media/videos/scene/1080p60/parti al_movie_files/TexTransformExampleSimple/2788726626_1615497636_227427286.mp4'] [05/16/21 23:42:25] INFO scene_file_writer.py:585 File ready at /path/to/project/manim/media/videos/scene/1080p60/Tex TransformExampleSimple_ManimCE_v0.6.0.gif INFO Rendered TexTransformExampleSimple scene.py:217 Played 2 animations ```System specifications
System Details
- MacOS 10.14.6 Mojave (patcher), macbook pro 2011 - RAM: 16 Go - Python 3.9.5 - Installed modules (provide output from `pip list`): ``` appnope 0.1.2 backcall 0.2.0 certifi 2020.12.5 chardet 4.0.0 click 7.1.2 click-default-group 1.2.2 cloup 0.7.1 colorama 0.4.4 colour 0.1.5 commonmark 0.9.1 cycler 0.10.0 Cython 0.29.22 decorator 4.4.2 glcontext 2.3.3 idna 2.10 ipython 7.22.0 ipython-genutils 0.2.0 jedi 0.18.0 kiwisolver 1.3.1 manim 0.6.0 manimgl 1.0.1.dev18 /Users/sylvann/GitCloned/manim/manim ManimPango 0.2.4 mapbox-earcut 0.12.10 matplotlib 3.4.0 mccabe 0.6.1 moderngl 5.6.4 moderngl-window 2.3.0 mpmath 1.2.1 multipledispatch 0.6.0 networkx 2.5.1 numpy 1.20.2 parso 0.8.2 pexpect 4.8.0 pickleshare 0.7.5 Pillow 8.1.2 pip 21.1.1 prompt-toolkit 3.0.18 ptyprocess 0.7.0 pybind11 2.6.2 pycairo 1.20.0 pycodestyle 2.7.0 pydub 0.25.1 pyflakes 2.3.1 pyglet 1.5.15 Pygments 2.8.1 PyGObject 3.40.1 pyobjc-core 7.1 pyobjc-framework-Cocoa 7.1 PyOpenGL 3.1.5 pyparsing 2.4.7 pyrr 0.10.3 python-dateutil 2.8.1 PyYAML 5.4.1 requests 2.25.1 rich 6.2.0 scipy 1.6.3 screeninfo 0.6.7 setuptools 56.0.0 six 1.15.0 sympy 1.7.1 tqdm 4.59.0 traitlets 5.0.5 typing-extensions 3.10.0.0 urllib3 1.26.4 validators 0.18.2 watchdog 2.1.0 wcwidth 0.2.5 wheel 0.36.2 ```LaTeX details
+ LaTeX distribution : MacTeX 2021FFMPEG
Output of `ffmpeg -version`: ``` 4.4 ```Additional comments
A work around for the disapearing of the last character under the sqrt is to add an other random character to its right. But it is clearly not viable, and doesn't solve the morphing issue.