如何在p5.js中将加速添加到主圆？

let mainCircle;

function setup() {
  createCanvas(400, 400);
  mainCircle = {
    x: width / 2,
    y: height / 2,
    speedX: 0,
    speedY: 0,
    accelerationX: 0,
    accelerationY: 0
  };
}

function draw() {
  background(220);
  
  // 绘制主圆
  ellipse(mainCircle.x, mainCircle.y, 50, 50);
  
  // 更新速度和位置
  mainCircle.speedX += mainCircle.accelerationX;
  mainCircle.speedY += mainCircle.accelerationY;
  mainCircle.x += mainCircle.speedX;
  mainCircle.y += mainCircle.speedY;
  
  // 限制主圆的位置
  if (mainCircle.x < 0 || mainCircle.x > width) {
    mainCircle.speedX *= -1;
  }
  if (mainCircle.y < 0 || mainCircle.y > height) {
    mainCircle.speedY *= -1;
  }
}

// 在其他地方设置加速度
function setAcceleration(accelerationX, accelerationY) {
  mainCircle.accelerationX = accelerationX;
  mainCircle.accelerationY = accelerationY;
}