ManimCommunity / ManimCommunity/manim
DecimalNumber with color BLACK not appearing on white background
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- Dominant language
- Python
- Stars
- 40.9k
- Forks
- 3.1k
- Avg merge
- 3d 12h
- Merged PRs (30d)
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Description
## Description of bug / unexpected behavior
With a white background, a DecimalNumber of color RED or GREEN will appear, but not with BLACK!
## How to reproduce the issue
```python
from manim import *
class ColorBug(Scene):
def construct(self):
self.camera.background_color=WHITE
num1 = DecimalNumber(3.1415, color=RED)
num2 = DecimalNumber(2.71828, color=BLACK)
self.play(FadeIn(num1))
self.play(FadeOut(num1))
self.wait()
self.play(FadeIn(num2))
self.play(FadeOut(num2))
self.wait()
```
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
Run the provided Python reproduction with a white camera background and compare the RED and BLACK DecimalNumber cases. Trace DecimalNumber's rendering and color handling to identify why BLACK is not visible. Done means a BLACK DecimalNumber appears on white as expected, with coverage for this regression if the existing test structure supports it.
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
- Mostly clear
- Newbie friendliness
- 35/100