Offline · auditable · one file
Window
Ray
Know when a measured window's direct sun will reach a measured desk, shelf, or tabletop—without CAD, an account, or a network request.
6,720real example rays
4auditable outputs
0runtime dependencies
A narrow honest contract
Solar position → nearest room boundary → declared opening → target coverage.
WindowRay emits deterministic plan.json, samples.csv, report.html, and floorplan.svg. It predicts idealized direct geometric visibility—not lux, weather, plant health, glare safety, or professional compliance.