JS 生成圆内随机坐标

需求

根据圆心坐标和圆半径生成一组圆内随机坐标

代码

/**
* 根据圆心坐标生成一组圆内随机坐标
* @param {number} radius 半径
* @param {number} centerX 圆心x轴坐标
* @param {number} centerY 圆心y轴坐标
* @return {Array} 坐标数组
*/
getRandomCoordinatesInCircle(radius, centerX, centerY){
  let coords = [];
  const num = 10; // 生成坐标数量。
  while(coords.length < num) {
    let x = (Math.random() * radius * 2 - radius + centerX).toFixed(5);
    let y = (Math.random() * radius * 2 - radius + centerY).toFixed(5);
    // x^2 + y^2 <= r^2
    let distance = Math.sqrt(Math.pow(x - centerX, 2) + Math.pow(y - centerY, 2));
    if (distance <= radius) {
      const currentPoint = [x, y];
      if (!coords.includes(currentPoint)) {
        coords.push(currentPoint);
      }
    }
  }
  return coords;
}

END