Issue rendering lines with OpenGL renderer

[atzlt]

Description of bug / unexpected behavior

Whenever I tried to render a straight line with OpenGL renderer (in ThreeDScene, if this is relevant), it fails to appear.

Expected behavior

Lines should appear.

How to reproduce the issue

Minimal example:

# main.py
from manim import *


class ExampleScene(ThreeDScene):
    def construct(self):
        self.add(Line())
        self.wait()

Render with manim render main.py --renderer opengl --write_to_file. The resulting movie is empty.

Logs

Terminal output

$ manim render main.py --renderer opengl --write_to_movie -v debug
Manim Community v0.17.3

[08/18/23 22:25:26] DEBUG    Animation with empty mobject                                                                animation.py:174
                    DEBUG    Hashing ...                                                                                   hashing.py:350 
                    DEBUG    Hashing done in 0.008119 s.                                                                   hashing.py:362
                    DEBUG    Hash generated :  2465576764_2828545558_228940957                                             hashing.py:365 
                    DEBUG    List of the first few animation hashes of the scene: ['2465576764_2828545558_228940957']       caching.py:61 
                    DEBUG    C:\Users\hp\scoop\apps\python\current\Lib\site-packages\manim\renderer\shaders\vert.gls shader_wrapper.py:32
                             l does not exist.
                    DEBUG    \vert.glsl does not exist.                                                              shader_wrapper.py:32 
                    DEBUG    C:\Users\hp\scoop\apps\python\current\Lib\site-packages\manim\renderer\shaders\geom.gls shader_wrapper.py:32 
                             l does not exist.
                    DEBUG    \geom.glsl does not exist.                                                              shader_wrapper.py:32 
                    DEBUG    C:\Users\hp\scoop\apps\python\current\Lib\site-packages\manim\renderer\shaders\frag.gls shader_wrapper.py:32
                             l does not exist.
                    DEBUG    \frag.glsl does not exist.                                                              shader_wrapper.py:32 
[08/18/23 22:25:27] INFO     Animation 0 : Partial movie file written in                                         scene_file_writer.py:527
                             '<path-to-project-root>\media\videos\main\1080p60\partial_movie_fi
                             les\ExampleScene\2465576764_2828545558_228940957.mp4'
                    INFO     Combining to Movie file.                                                            scene_file_writer.py:617 
                    DEBUG    Partial movie files to combine (1 files):                                           scene_file_writer.py:561 
                             ['E:\\CodePro\\Animations\\manim\\art-gallery\\media\\videos\\main\\1080p60\\partia
                             l_movie_files\\ExampleScene\\2465576764_2828545558_228940957.mp4']
                    INFO                                                                                         scene_file_writer.py:736
                             File ready at
                             'E:\CodePro\Animations\manim\art-gallery\media\videos\main\1080p60\ExampleScene.mp4
                             '

                    INFO     Rendered ExampleScene                                                                           scene.py:241 
                             Played 1 animations

System specifications

System Details

• OS: Windows 10
• RAM: 16GB
• Python version (python/py/python3 --version): Python 3.11.1

FFMPEG

Output of ffmpeg -version:

ffmpeg version 5.0-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 11.2.0 (Rev5, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
libavutil      57. 17.100 / 57. 17.100
libavcodec     59. 18.100 / 59. 18.100
libavformat    59. 16.100 / 59. 16.100
libavdevice    59.  4.100 / 59.  4.100
libavfilter     8. 24.100 /  8. 24.100
libswscale      6.  4.100 /  6.  4.100
libswresample   4.  3.100 /  4.  3.100
libpostproc    56.  3.100 / 56.  3.100

[uwezi]

can you try the following code:

from manim import *
from manim.opengl import *

class ExampleScene(ThreeDScene):
    def construct(self):
        self.add(Line())
        self.wait()        

[atzlt]

No, it doesn't work. The scene is still empty.

[atzlt]

This problem is serious enough to break my workflow. I hope there is someone investigating it. I would provide as much information as I can.
(By the way filling objects works fine. Only strokes are not shown. Also if I use cairo renderer everything renders correctly.)

[vaclavblazej]

Hi. I was unable to reproduce the issue. Do you use some custom configuration?

Source code

# main.py
from manim import *


class ExampleScene(ThreeDScene):
    def construct(self):
        self.add(Line())
        self.wait()

Build output

$ manim render main.py --renderer opengl --write_to_movie -p -v debug
Manim Community v0.17.3

[08/22/23 17:51:54] DEBUG    Animation with empty mobject                                                                                      animation.py:174
                    DEBUG    Hashing ...                                                                                                         hashing.py:350
                    DEBUG    Hashing done in 0.008371 s.                                                                                         hashing.py:362
                    DEBUG    Hash generated :  233493676_3146877161_3043888565                                                                   hashing.py:365
                    DEBUG    List of the first few animation hashes of the scene: ['233493676_3146877161_3043888565']                             caching.py:61
                    DEBUG    /home/u2271725/Documents/Projects/manim/manim/renderer/shaders/vert.glsl does not exist.                      shader_wrapper.py:32
                    DEBUG    /vert.glsl does not exist.                                                                                    shader_wrapper.py:32
                    DEBUG    /home/u2271725/Documents/Projects/manim/manim/renderer/shaders/geom.glsl does not exist.                      shader_wrapper.py:32
                    DEBUG    /geom.glsl does not exist.                                                                                    shader_wrapper.py:32
                    DEBUG    /home/u2271725/Documents/Projects/manim/manim/renderer/shaders/frag.glsl does not exist.                      shader_wrapper.py:32
                    DEBUG    /frag.glsl does not exist.                                                                                    shader_wrapper.py:32
[08/22/23 17:51:55] INFO     Animation 0 : Partial movie file written in                                                               scene_file_writer.py:527
                             '/home/u2271725/Documents/Projects/manim/media/videos/main/1080p60/partial_movie_files/ExampleScene/23349
                             3676_3146877161_3043888565.mp4'
                    INFO     Combining to Movie file.                                                                                  scene_file_writer.py:617
                    DEBUG    Partial movie files to combine (1 files):                                                                 scene_file_writer.py:561
                             ['/home/u2271725/Documents/Projects/manim/media/videos/main/1080p60/partial_movie_files/ExampleScene/2334
                             93676_3146877161_3043888565.mp4']
                    INFO                                                                                                               scene_file_writer.py:735
                             File ready at '/home/u2271725/Documents/Projects/manim/media/videos/main/1080p60/ExampleScene.mp4'

                    INFO     Rendered ExampleScene                                                                                                 scene.py:241
                             Played 1 animations
                    INFO     Previewed File at: '/home/u2271725/Documents/Projects/manim/media/videos/main/1080p60/ExampleScene.mp4'            file_ops.py:227

Rendered output

ExampleScene.mp4

• Python 3.11.4
• ffmpeg

ffmpeg version 5.1.2-3ubuntu1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12 (Ubuntu 12.2.0-14ubuntu2)
configuration: --prefix=/usr --extra-version=3ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
libavutil      57. 28.100 / 57. 28.100
libavcodec     59. 37.100 / 59. 37.100
libavformat    59. 27.100 / 59. 27.100
libavdevice    59.  7.100 / 59.  7.100
libavfilter     8. 44.100 /  8. 44.100
libswscale      6.  7.100 /  6.  7.100
libswresample   4.  7.100 /  4.  7.100
libpostproc    56.  6.100 / 56.  6.100

[vaclavblazej]

Does the issue persist if you use Scene and remove wait?

[uwezi]

This problem is serious enough to break my workflow. I hope there is someone investigating it. I would provide as much information as I can. (By the way filling objects works fine. Only strokes are not shown. Also if I use cairo renderer everything renders correctly.)

Does this problem persist for very thick lines, such as stroke_width=10 ?

[atzlt]

from manim import *
from manim.opengl import *

class Intro(Scene):
    def construct(self):
        self.add(Line(stroke_width=10))
        self.wait()

Still empty. Is that an issue with my OpenGL?

Does the issue persist if you use Scene and remove wait?

I'm not sure how I can see the output without a wait. Could you tell me the details?