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gods-eye-view/scripts
Sameh Khamis 38ba8a3b59 perf(shipwrecks): draw the wreck markers from one billboard collection, on the wreck, and rebuild them only on new data
- The ~8,000 markers were one Cesium entity each; they are now one
  BillboardCollection (as FIRMS, vessels and wildlife sightings do), ordered
  at the bottom of the shared sprite stack so moving traffic draws over it.
- eyeOffset.z was the death toll in metres, so a 1,500-death wreck's marker
  sat 1.5 km toward the camera and clipped or drifted when close. It is gone;
  markers are added by rising toll, so a bigger toll still draws on top.
- The page asks every 6 h but the proxy changes data at most daily: the proxy
  now sends a version that changes with either source's data, and the layer
  rebuilds only when it does.
- Adds a controller test: enable/disable, teardown, draw order, unchanged
  snapshots, a late response after turning off, and the period closing an
  open card.
2026-11-10 13:25:03 -08:00
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