Rotation via Double Reflection
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While studying Geometric Algebra I have built some interactive visualization to demonstrate how geometric transformations (rotation, scaling, translation) can be constructed by just composing reflections.Accepting reflection as the most elementary geometric operation was an eye opening moment for me. I think some of you might enjoy the interactive visuals.
HN · launched Aug 21, 2026 · 61 upvotes (top 12%) · 0 views
Niche: interactive 3d web simulations · 157 launches, 9 in the last 7 days ▼ -47% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 157 launches in interactive 3d web simulations →
Could you build this?
Yes It is an educational interactive math visualization showing geometric transformations using standard 2D/3D canvas rendering (like Three.js or SVG).
Discussion
15 comments analyzed.
Competitors mentioned: Alan Paeth's three-shear rotation algorithm, Rotation matrices with trigonometric functions, Complex number rotation (e^ai)
Concerns raised: Construction doesn't generalize correctly to 4D+ dimensions, Reflection framed around vectors instead of planes limits higher-dimensional applicability, Still requires trigonometric functions to construct initial vectors/angle, Vague mathematical explanations in higher dimensions section
Feature requests: Consistent color scheme across all diagrams (2D, 3D, circular reflection), Label vectors with their variable names (s, u, v) in diagram annotations, Rework reflection to use plane-based framing instead of vector-based
Competitors
Other products that read as similar to this one : 224 launches clear the similarity bar, closest 8 shown.
Attention rank: #40 of 225 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 296 days after the earliest competitor.
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