manim: Incorrect graphing?
Description of bug / unexpected behavior
Manim’s GraphScene output is showing some artefacts in one context: “calculating modulo of 1.0” or x % 1.0.
I’ll compare it to GeoGebra, because I have a GeoGebra tab open, it has a mod command and it shows a different result.
There’s some “ripple” on the function output I’d like to fix. Also, function output reaches values less than 0.
Also, I don’t mind the vertical lines.
Expected behavior
GeoGebra shows (I believe) a correct plot.
How to reproduce the issue
Code for reproducing the problem
from manim import *
import numpy as np
class PhaseValuePlot(GraphScene):
def __init__(self, **kwargs):
GraphScene.__init__(
self,
x_min=-3,
x_max=3,
num_graph_anchor_points=100,
y_min=-2.0,
y_max=2.0,
graph_origin=ORIGIN,
axes_color=WHITE,
x_labeled_nums=range(-3, 3, 1),
y_axis_label="Phase [p]",
x_axis_label="Time [T]",
**kwargs
)
self.function_color = BLUE
def construct(self):
self.setup_axes()
func_graph = self.get_graph(lambda t: t % 1.0, x_min=-2, x_max=2, discontinuities=[1], color=self.function_color)
phase_formula = MathTex(r"p = T \mod 1.0")
phase_formula.next_to(func_graph, RIGHT + UP)
self.play(ShowCreation(self.axes))
self.play(Write(phase_formula))
self.play(Write(func_graph))
self.wait(3)
self.play(FadeOut(func_graph))
self.play(FadeOut(self.axes))
Additional media files
What Manim shows:
System specifications
System Details
- OS: Ubuntu Bionic 18.04.5 LTS
- RAM: 8 Gb
- Python version: Python 3.6.9
- Installed modules:
absl-py 0.7.1
aiohttp 3.6.2
aioice 0.6.18
alabaster 0.7.8
apturl 0.5.2
argh 0.26.2
asciinema 2.0.0
asn1crypto 0.24.0
astor 0.8.0
astroid 2.2.5
async-timeout 3.0.1
attrs 19.3.0
Automat 20.2.0
autopy 3.1.0
Babel 2.4.0
beautifulsoup4 4.6.0
binwalk 2.1.1
bleach 2.1.2
bleak 0.9.1
bottle 0.12.18
breathe 4.20.0
Brlapi 0.6.6
bs4 0.0.1
certifi 2019.9.11
cffi 1.14.0
chardet 3.0.4
cldoc 1.11.2
Click 7.0
cloudpickle 1.3.0
colorama 0.4.3
colour 0.1.5
command-not-found 0.3
commonmark 0.9.1
constantly 15.1.0
cpp-coveralls 0.4.2
cryptography 3.4.6
cssselect 1.1.0
cupshelpers 1.0
cycler 0.10.0
dataclasses 0.7
decorator 4.4.2
defer 1.0.6
devscripts 2.17.12ubuntu1.1
discord.py 1.5.0
distro-info 0.18ubuntu0.18.04.1
Django 2.2.5
django-modelcluster 4.4
django-taggit 0.24.0
django-treebeard 4.3
djangorestframework 3.10.3
docutils 0.14
draftjs-exporter 2.1.6
entrypoints 0.2.3.post1
enum34 1.1.10
exhale 0.2.3
Flask 1.1.1
freetype-py 2.1.0.post1
future 0.18.2
gast 0.2.2
gevent 1.4.0
gpg 1.10.0
greenlet 0.4.15
groundwork-sphinx-theme 1.1.1
grpcio 1.20.1
gym 0.17.2
h5py 2.9.0
hawkmoth 0.7.0
html5lib 1.0.1
httplib2 0.9.2
hyperlink 20.0.1
idna 2.8
idna-ssl 1.1.0
imagesize 0.7.1
importlib-metadata 3.7.3
incremental 17.5.0
inputs 0.5
ipykernel 4.8.2
ipython 5.5.0
ipython-genutils 0.2.0
isodate 0.6.0
isort 4.3.18
itsdangerous 1.1.0
jedi 0.11.1
Jinja2 2.10.1
joblib 0.14.0
jsonschema 2.6.0
jupyter-client 5.2.2
jupyter-core 4.4.0
Keras 2.2.4
Keras-Applications 1.0.7
Keras-Preprocessing 1.0.9
keyring 10.6.0
keyrings.alt 3.0
kiwisolver 1.2.0
language-selector 0.1
launchpadlib 1.10.6
lazr.restfulclient 0.13.5
lazr.uri 1.0.3
lazy-object-proxy 1.3.1
libsass 0.19.4
logilab-common 1.4.1
louis 3.5.0
lxml 4.4.1
macaroonbakery 1.1.3
Mako 1.0.7
manim 0.4.0
ManimPango 0.2.3
Markdown 3.1.1
MarkupSafe 1.1.1
matplotlib 2.1.1
mccabe 0.6.1
meld 3.18.0
MIDIUtil 1.2.1
mido 1.2.9
mistune 0.8.3
mock 3.0.5
MouseInfo 0.1.2
mpi4py 3.0.3
multidict 4.7.2
music21 5.7.2
musthe 1.0.0
nbconvert 5.3.1
nbformat 4.4.0
netifaces 0.10.4
networkx 2.5
nmap 0.0.1
numpy 1.16.3
numpydoc 0.7.0
oauth 1.0.1
olefile 0.45.1
opencv-python 4.1.1.26
openshot-qt 2.4.1
packaging 19.2
pandocfilters 1.4.2
parsimonious 0.8.1
parso 0.1.1
pathtools 0.1.2
pexpect 4.2.1
pick 0.6.4
pickleshare 0.7.4
Pillow 6.1.0
pip 21.0.1
Pivy 0.6.5a0
plaidml 0.7.0
ply 3.11
pony 0.7.13
prompt-toolkit 1.0.15
protobuf 3.7.1
psutil 5.4.2
PyAutoGUI 0.9.48
pybase62 0.4.3
pybullet 2.8.3
pycairo 1.19.1
pycodestyle 2.3.1
pycparser 2.20
pycrypto 2.6.1
pycups 1.9.73
pydub 0.25.1
pyflakes 1.6.0
pygame 1.9.6
PyGetWindow 0.0.8
pyglet 1.5.0
Pygments 2.8.1
pygobject 3.26.1
PyHamcrest 2.0.2
pylint 2.3.1
pymacaroons 0.13.0
PyMsgBox 1.0.7
PyNaCl 1.1.2
pynmea2 1.15.0
PyOpenGL 3.1.0
pyOpenSSL 20.0.1
pyparsing 2.2.0
pyperclip 1.7.0
pyqtgraph 0.10.0
pyquery 1.4.1
PyRect 0.1.4
pyRFC3339 1.0
PyScreeze 0.1.26
pyserial 3.4
pyserial-asyncio 0.4
python-apt 1.6.5+ubuntu0.5
python-dateutil 2.8.1
python-debian 0.1.32
python-dotenv 0.7.1
python-magic 0.4.16
python3-xlib 0.15
PyTweening 1.0.3
pytz 2019.2
pyxdg 0.25
PyYAML 3.12
pyzmq 16.0.2
QtAwesome 0.4.4
qtconsole 4.3.1
QtPy 1.3.1
reportlab 3.4.0
requests 2.22.0
requests-unixsocket 0.1.5
requirements-parser 0.2.0
rich 6.2.0
roman 2.0.0
rope 0.10.5
russian-names 0.1.2
scapy 2.4.2
scikit-learn 0.21.3
scipy 0.19.1
scour 0.36
screen-resolution-extra 0.0.0
SecretStorage 2.3.1
selenium 3.141.0
setuptools 41.0.1
simplegeneric 0.8.1
simplejson 3.13.2
six 1.12.0
sklearn 0.0
slacker 0.13.0
snowballstemmer 2.0.0
SoundCard 0.3.3
Sphinx 3.2.1
sphinx-rtd-theme 0.4.3
sphinxcontrib-applehelp 1.0.1
sphinxcontrib-devhelp 1.0.1
sphinxcontrib-htmlhelp 1.0.2
sphinxcontrib-inlinesyntaxhighlight 0.2
sphinxcontrib-jsmath 1.0.1
sphinxcontrib-qthelp 1.0.2
sphinxcontrib-serializinghtml 1.1.3
spyder 3.2.6
sqlparse 0.3.0
ssh-import-id 5.7
system-service 0.3
systemd-python 234
tensorboard 1.13.1
tensorflow 1.13.1
tensorflow-estimator 1.13.0
termcolor 1.1.0
terminaltables 3.1.0
testpath 0.3.1
tornado 4.5.3
tqdm 4.59.0
traitlets 4.3.2
Twisted 20.3.0
txdbus 1.1.2
typed-ast 1.3.5
typing-extensions 3.7.4.1
ubuntu-drivers-common 0.0.0
ufw 0.36
unattended-upgrades 0.1
Unidecode 1.1.1
unidiff 0.5.4
urllib3 1.25.3
usb-creator 0.3.3
uWSGI 2.0.18
vboxapi 1.0
virtualenv 16.6.0
vispy 0.6.3
wadllib 1.3.2
wagtail 2.6.1
watchdog 0.9.0
wcwidth 0.1.7
webencodings 0.5.1
websocket-client 0.57.0
Werkzeug 0.15.6
wheel 0.33.4
Willow 1.1
wrapt 1.11.1
wxPython 4.0.1
xkit 0.0.0
yarl 1.4.2
youtube-dl 2020.12.12
zipp 3.4.1
zope.interface 5.1.2
LaTeX details
-
LaTeX distribution (e.g. TeX Live 2020): TeX Live 2017.20180305-1
-
Installed LaTeX packages:
(running on Debian, switching to user mode!) Cannot determine type of tlpdb from /home/grid/texmf! cannot setup TLPDB in /home/grid/texmf at /usr/bin/tlmgr line 6424.
FFMPEG
Output of ffmpeg -version:
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
UPD: discontinuities parameter is broken, more info in this message.
About this issue
- Original URL
- State: closed
- Created 3 years ago
- Comments: 18 (5 by maintainers)
Since
GraphScenewas removed in #1860, can this issue be closed?The issue should remain open until the suggested solution is actually merged.