$ ls -la ~/blog
Notes
Feng shui & Yijing knowledge, behind-the-scenes dev notes, and changelogs for every release.
Reading the iOS magnetometer: a compass that doesn’t drift
CLLocationManager returns two kinds of heading — pick the wrong one and your compass is off by double digits. Notes from building La Kinh.
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The Lỗ Ban ruler: why are there three of them?
Thông Thuỷ, Dương Trạch, Âm Trạch — three rulers, three purposes. Reach for the wrong one and the conclusion is wrong from the start.
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Ngũ Linh 1.3 — what’s in the current release
The seven feature groups in 1.3: casting by date and hour, the time-swap method, per-star readings, direct Can Chi input, the monthly view, the 64-hexagram reference and interface options.
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