floating-point

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25+ years of pathfinding problems with C++

Lobsters Hottest · 2d ago Cached

The Engineering Director of Age of Empires provides an in-depth analysis of the technical debt in the series' pathfinding system over the past 25 years, pointing out that legacy code, dynamic map mechanics, and floating-point errors caused by SIMD instruction sets replacing x87 extended precision are the root causes of classic bugs such as units clipping through walls.

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#floating-point

Fc, a lossless compressor for floating-point streams

Hacker News Top · 3d ago Cached

fc is an open-source lossless compressor for IEEE-754 64-bit double streams, offering superior compression ratios for structured data compared to zstd and fpzip, though with slower encoding speeds.

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#floating-point

Floats Don't Agree with Themselves

Hacker News Top · 2026-05-06 Cached

Developer releases `exact-poly`, a 2D geometry library using exact integer arithmetic instead of floats to eliminate cross-platform reproducibility issues caused by IEEE 754 implementation differences.

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#floating-point

Math is hard (OpenBSD on VAX)

Lobsters Hottest · 2026-04-22 Cached

OpenBSD developer details the painful quirks of VAX floating-point exceptions and how they complicate kernel porting.

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