OliverStrait
commented
1 week ago This is mobject caching issue. You can bypass the issue with this:
from manim import *
config.disable_caching = True
class Test(Scene):
....Details:
- First render is a normal and output is ok. Two partial files is produced.
- Second render will produce 3rd partial file in which Traced path is not rendered.
Description of bug / unexpected behavior
TracedPath mobjects disappear as soon as other objects are added to the scene.
Expected behavior
I would have expected that they stay visible like other objects (for example like the circle in the example code).
How to reproduce the issue
With the code below, the path is visible at the end. However, if you add the line that is commented out, the traced path will vanish.
Code for reproducing the problem
```py from manim import * r = 1.5 class Test(Scene): def construct(self): c = Circle(radius = r).shift(-r*PI*RIGHT) dot_pt = lambda t: c.point_at_angle(3*PI/2-2*t*PI) d = Dot(dot_pt(0)) traced = TracedPath(d.get_center) e = Dot(ORIGIN) self.add(c,d,traced) self.play( c.animate.shift(2*r*PI*RIGHT), UpdateFromAlphaFunc(d,lambda mo,t: mo.move_to(dot_pt(t))), run_time=5 ) #self.add(e) self.wait() ```System specifications
System Details
- OS: Windows 10 Pro 22H2 19045.5011 - RAM: 16 GB - Python version: 3.12.7 - Installed modules: ``` Package Version ------------------------ ----------- annotated-types 0.7.0 asttokens 2.4.1 av 13.1.0 beautifulsoup4 4.12.3 cachetools 5.5.0 certifi 2024.8.30 charset-normalizer 3.4.0 click 8.1.7 click-default-group 1.2.4 cloup 3.0.5 colorama 0.4.6 colour 0.1.5 contourpy 1.3.0 cycler 0.12.1 decorator 5.1.1 distlib 0.3.9 executing 2.1.0 filelock 3.16.1 fonttools 4.54.1 glcontext 3.0.0 google-api-core 2.21.0 google-api-python-client 2.149.0 google-auth 2.35.0 google-auth-httplib2 0.2.0 googleapis-common-protos 1.65.0 httplib2 0.22.0 idna 3.10 ipython 8.28.0 isosurfaces 0.1.2 jedi 0.19.1 Jinja2 3.1.4 kiwisolver 1.4.7 lxml 5.3.0 manim 0.18.1 manim-slides 5.1.8 ManimPango 0.6.0 mapbox_earcut 1.0.2 markdown-it-py 3.0.0 MarkupSafe 3.0.1 matplotlib 3.9.2 matplotlib-inline 0.1.7 mdurl 0.1.2 moderngl 5.11.1 moderngl-window 2.4.6 mpmath 1.3.0 multipledispatch 1.0.0 networkx 3.4.1 numpy 1.26.4 oauth2client 4.1.3 packaging 24.1 parso 0.8.4 pillow 10.4.0 pip 24.2 platformdirs 4.3.6 prompt_toolkit 3.0.48 proto-plus 1.24.0 protobuf 5.28.2 pure_eval 0.2.3 pyasn1 0.6.1 pyasn1_modules 0.4.1 pycairo 1.27.0 pydantic 2.9.2 pydantic_core 2.23.4 pydantic-extra-types 2.9.0 pydub 0.25.1 pyglet 2.0.18 Pygments 2.18.0 PyOpenGL 3.1.7 pyparsing 3.2.0 pyperclip 1.9.0 pyrr 0.10.3 PySide6 6.8.0 PySide6_Addons 6.8.0 PySide6_Essentials 6.8.0 python-dateutil 2.9.0.post0 python-pptx 1.0.2 PyYAML 6.0.2 QtPy 2.4.1 requests 2.32.3 rich 13.9.2 rsa 4.9 rtoml 0.11.0 scipy 1.14.1 screeninfo 0.8.1 setuptools 75.1.0 shiboken6 6.8.0 six 1.16.0 skia-pathops 0.8.0.post1 soupsieve 2.6 srt 3.5.3 stack-data 0.6.3 svgelements 1.9.6 sympy 1.13.3 tqdm 4.66.5 traitlets 5.14.3 typing_extensions 4.12.2 uritemplate 4.1.1 urllib3 2.2.3 validators 0.34.0 virtualenv 20.26.6 watchdog 5.0.3 wcwidth 0.2.13 XlsxWriter 3.2.0 ```