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deepmind.google·6d ago
AI Engineering
Lobsters·13d ago·5 min read
SIMD for Collision
TL;DR
Wide SIMD techniques were implemented in Box3D's collision detection, significantly improving performance for complex hulls. The results show over twice the speed compared to scalar methods.
✦ Why It Matters
Consider implementing wide SIMD techniques in your collision detection algorithms for better performance.
Key Takeaways
- Implement wide SIMD for processing multiple collision points simultaneously.
- Use the Separating Axis Test for accurate collision detection without gaps.
- Benchmark performance improvements with SIMD in complex hull scenarios.
- Explore AVX2 intrinsics for further optimization in collision detection.
How It Works
Wide SIMD processes multiple edges simultaneously, allowing for efficient collision detection. For example, one edge from hull A can be tested against four edges from hull B at once, significantly reducing the number of required calculations.