Swell

Angle

Size H₀

Period

Tide

Angle is degrees off shore‑normal. Moving any of these clears the water.

---

Sun

Azimuth

Elevation

0° is offshore, up the frame, turning clockwise. Moving the sun does not clear the water.

---

Seabed

Save bed writes into beds/ through the dev server, so it lands where ?bed= reads it back from.

---

View

Keys 1–6. Drag to pan, wheel to zoom, 0 to reset the view. Click the water to drop the rider there. On a touchscreen the camera follows the rider and the lower part of the frame is the pad, so panning is the strip above it.

---

Rider

Space

paddle — hold for a stroke rhythm

← →

lean left / right

F

free the camera — it follows the rider by default

D

duck dive — get under the wave in front of you

R

drop back in the lineup

B

change board — longboard, shortboard, fish

N

next spot — cycles the beaches in the config

L

overlay the crest polylines

C

print the running config to the console as JSON

Tuning is config.json, overridden by the query string. The seabed format, the boards and the full parameter list are in README.md.