Scanning sweep

TerminalSweep.draw() adds a scanning line, corner accents, and rails. down moves from top to bottom; right moves from left to right. The default is down.

import { Graphics } from 'pixi.js';
import { CyberPreset, TerminalSweep } from '@gamedevland/cyber-ui';

const g = app.stage.addChild(new Graphics());
const progress = 0.5;
const reduced = matchMedia('(prefers-reduced-motion: reduce)').matches;
TerminalSweep.draw(g.clear(), 24, 24, 360, 180,
  progress, CyberPreset.palette.accent, reduced, 'right');

Progress is in [0, 1). Outside that range the helper adds nothing; clear the dedicated layer first to remove the previous frame. A looping host can supply (elapsedSeconds % durationSeconds) / durationSeconds.

Reduced motion leaves corner accents without a moving line. The application controls pause and completion; the helper creates no timer or ticker.