(function(){
  // 注册铜钱形状渲染函数 外圆加中间正方形孔
  window.YooneSnowShapeRenderers = window.YooneSnowShapeRenderers || {};
  window.YooneSnowShapeRenderers.coin = function(context, positionX, positionY, baseSize){
    // 函数用于绘制铜钱形状 使用合成模式扣出孔
    const outerRadius = baseSize * 3; // 将基础尺寸放大为外圆半径
    context.save();
    context.beginPath();
    context.fillStyle = '#FFD700';
    context.arc(positionX, positionY, outerRadius, 0, Math.PI * 2);
    context.fill();
    const holeSize = outerRadius * 0.6; // 正方形孔边长基于外圆半径
    context.globalCompositeOperation = 'destination-out';
    context.beginPath();
    context.rect(
      positionX - holeSize / 2,
      positionY - holeSize / 2,
      holeSize,
      holeSize
    );
    context.fill();
    context.restore();
  };
})();