// and get a point

//

// By Jon Froehlich

// http://makeabilitylab.io

// 

// See:

//  - https://learning.oreilly.com/library/view/make-getting-started/9781457186769/ch05.html#response

​

​

let avatar;

let blackhole;

let score = 0;

​

function setup() {

  createCanvas(600, 400);

  // create the game character

  avatar = new Ball(width/2, height/2, 30, color(0, 0, 255, 140));

  // create the black hole

  let blackholeDiameter = random(avatar.diameter + 10, 100);

  let blackholeRadius = blackholeDiameter/2;

  let blackholeX = random(blackholeRadius, width - blackholeRadius);

  let blackholeY = random(blackholeRadius, height - blackholeRadius);

  blackhole = new Ball(blackholeX, blackholeY, blackholeDiameter, color(0, 0, 0, 128));

}

​

function draw() {

  background(204);

  blackhole.draw();

  if(blackhole.contains(avatar)){

    print("Yum!");

    score++;

    blackhole.relocate();

  }

  avatar.draw();

  textSize(20);

  text("Score:" + score, 10, 20);

​

}

​

function keyPressed() {

  //print(keyCode, key);

  // don't put any drawing code in here!

  let pixelIncrement = 15;

  if (keyCode == LEFT_ARROW) {

    avatar.x = avatar.x - pixelIncrement;

  } else if (keyCode == RIGHT_ARROW) {

    avatar.x = avatar.x + pixelIncrement;

  } else if(keyCode == DOWN_ARROW){

    avatar.y = avatar.y + pixelIncrement; 

  }else if(keyCode == UP_ARROW){

    avatar.y = avatar.y - pixelIncrement; 

  }

  if(key == ' '){ // jump

    avatar.y = avatar.y - 100; 

  }

}

​

class Ball{

  constructor(x, y, diameter, fillColor){

    this.x = x;

    this.y = y;

    this.diameter = diameter;

    this.fillColor = fillColor;

  }

  draw(){

    push();

    noStroke();

    fill(this.fillColor);

    ellipse(this.x, this.y, this.diameter);

    pop();

  }

  relocate(){

    let radius = this.diameter / 2;

    this.x = random(radius, width - radius);

    this.y = random(radius, height - radius);  

  }

  contains(otherBall){

    let distFromThisBallToOtherBall = dist(this.x, this.y, otherBall.x, otherBall.y);

    let otherBallRadius = otherBall.diameter / 2;

    let thisRadius = this.diameter / 2;

    if(distFromThisBallToOtherBall + otherBallRadius <= thisRadius){

      return true;  

    }

    return false;

  }

}

​

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