ManimCommunity / ManimCommunity/manim
Line can be seen through vertex dots when using `~.get_line_graph()` in OpenGL
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issue:bug
opengl
- Dominant language
- Python
- Stars
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- Forks
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- Avg merge
- 3d 12h
- Merged PRs (30d)
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Description
Description of bug / unexpected behavior
When drawing a line graph with vertex dots using the OpenGL renderer, the line is visible through the vertex dots:
Now compare this to the Cairo-rendered version:
The lines are behind the vertex dots, as they should be.
Expected behavior
The vertex dots should fully cover the lines.
How to reproduce the issue
Code for reproducing the problem
from manim import *
class LineGraphExample(Scene):
def construct(self):
plane = NumberPlane(
x_range = (0, 7),
y_range = (0, 5),
x_length = 7,
axis_config={"include_numbers": True},
)
plane.center()
line_graph = plane.get_line_graph(
x_values = [0, 1.5, 2, 2.8, 4, 6.25],
y_values = [1, 3, 2.25, 4, 2.5, 1.75],
line_color=RED,
vertex_dot_style=dict(stroke_width=3, fill_color=BLUE),
stroke_width = 4,
)
self.play(Create(VGroup(plane, line_graph)))
self.wait(1)
System specifications
System Details
- OS (with version, e.g Windows 10 v2004 or macOS 10.15 (Catalina)): Ubuntu 21.04
- RAM: 32GB
- Python version (
python/py/python3 --version): 3.9.5 - Installed modules (provide output from
pip list):
Package Version
----------------------- ---------------------
manim 0.10.0
moderngl 5.6.4
moderngl-window 2.4.0
Additional comments
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the provided LineGraphExample with the OpenGL renderer and trace the implementation of get_line_graph(), especially how its lines and vertex dots are created and layered. Done means the vertex dots fully cover the lines at each vertex in OpenGL, matching the Cairo-rendered result.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- computer-graphics
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 45/100