updateRipples method

void updateRipples([
  1. int? now
])

Prunes completed ripples.

Optionally accepts now to reuse a single timestamp across multiple calls.

Implementation

void updateRipples([int? now]) {
  final current = now ?? DateTime.now().millisecondsSinceEpoch;
  _ripples.removeWhere((r) => current - r.startTime > r.durationMs);
}