fix: bug in tapered beam section handling

[Krande]

Also started looking into offscreen canvas using pygfx.

[github-actions]

👋 Hi there! I have checked your PR and found no issues. Thanks for your contribution!

PR Review:

I found no pr-related issues.

• ✅ PR title is ok
• ✅ Release label is ok
• ✅ SOURCE_KEY is set as a secret
• ✅ Calculated next version: "0.3.8"

Python Review:

I found no python-related issues.

Python Linting results:

• ✅ Isort
• ✅ Black
• ✅ Ruff

Python Packaging results:

• ✅ I found the PYPI_API_TOKEN secret.

Packaging Type	Package Name	Version
pyproject.toml	ada-py	0.3.7
pypi	ada-py	0.3.7

[codspeed-hq]

CodSpeed Performance Report

Merging #123 will not alter performance

_{Comparing fix/fea-report (0bb57c1) with main (293f7c9)}

Summary

✅ 7 untouched benchmarks