silphius/app/react-components/entity.jsx

import {Container, Graphics} from '@pixi/react';
import {memo, useCallback} from 'react';

import {useDebug} from '@/context/debug.js';

import Emitter from './emitter.jsx';
import Sprite from './sprite.jsx';

function Crosshair({x, y}) {
  const draw = useCallback((g) => {
    g.clear();
    g.lineStyle(1, 0x000000);
    g.moveTo(-5, 0);
    g.lineTo(5, 0);
    g.moveTo(0, -5);
    g.lineTo(0, 5);
    g.lineStyle(0.5, 0xffffff);
    g.moveTo(-5, 0);
    g.lineTo(5, 0);
    g.moveTo(0, -5);
    g.lineTo(0, 5);
    g.lineStyle(1, 0x000000);
    g.drawCircle(0, 0, 3);
    g.lineStyle(0.5, 0xffffff);
    g.drawCircle(0, 0, 3);
  }, []);
  return (
    <Graphics draw={draw} x={x} y={y} />
  );
}

function Entities({entity}) {
  const [debug] = useDebug();
  if (!entity) {
    return false;
  }
  return (
    <Container
      zIndex={entity.Position?.y}
    >
      {entity.Sprite && (
        <Sprite
          entity={entity}
        />
      )}
      {entity.Emitter && (
        <Emitter
          entity={entity}
        />
      )}
      {debug && entity.Position && (
        <Crosshair x={entity.Position.x} y={entity.Position.y} />
      )}
    </Container>
  );
}

export default memo(Entities);