Waves

Live WebGL ocean wave simulation driven by SmartAtlantic ERDDAP buoy data (St. John's). pinchards.is/waves/

GPU FFT ocean simulation fed by live wind, wave height, and wave period. The station panel and simulator refresh every 10 seconds.

Legacy wave.php, wave2.php, and ?layout= URLs redirect to /waves/.

Structure

index.php, call-api.php, health.php   # endpoints
lib/                                  # ERDDAP fetch, layout
assets/css/, assets/js/, assets/images/
cache/                                # ERDDAP cache (writable)
tests/

Data

Mapped in lib/erddap.php by column name:

Output	ERDDAP field
Wind (m/s)	wind_spd_avg
Wind vector	wind_dir_avg → wind_x / wind_y
Wave period (s)	wave_period_max
Wave height (m)	wave_ht_max

Cached 60s in cache/erddap-latest.json. NaN values fall back to the previous reading when possible.

Development

php -S localhost:8080
composer install && composer exec phpunit

Requires PHP 8.0+ (allow_url_fopen) and WebGL float textures.

Deploy

Push to main → rsync to DreamHost (/.github/workflows/deploy.yml).

Secrets: FTP_SERVER, FTP_USERNAME, FTP_SERVER_DIR, SSH_DEPLOY_KEY.

MIT — see LICENSE. Changes: CHANGELOG.md.