// Daniel Shiffman

// http://natureofcode.com

​

// Example 1-2: Bouncing Ball, with p5.Vector!

​

class Ball {

  constructor() {

    this.position = new createVector(100, 100);

    this.velocity = new createVector(2.5, 5);

  }

​

  update() {

    // Add the current speed to the position.

    this.position.add(this.velocity);

    if ((this.position.x > width) || (this.position.x < 0)) {

      this.velocity.x = this.velocity.x * -1;

    }

    if ((this.position.y > height) || (this.position.y < 0)) {

      this.velocity.y = this.velocity.y * -1;

    }

  }

  display() {

    // Display circle at x position

    stroke(0);

    fill(175);

    ellipse(this.position.x, this.position.y, 48, 48);

  }

}

​