//gravity acceleration

let a = 0.3;

//pipes velocity

let velocity = 2;

//width of pipes

let pipeWidth = 50;

//distance between pipes

let distanceBetweenPipes = 200; //se colocar menor que 150 da problema, pq aí o pipes[0] já passou da tela. Teria q usar pipes[1]

//velocity when you click mouse

let clickVelocity = 6.5;

let gapDist = 150;

​

let borderDist = 10;

​

let vo = 0;

let xo, yo;

let v;

let firstPipe = true;

let score = 0;

​

//bird size

let d = 20;

let r = d/2;

​

//timestep

let dt = 1;

​

let pipes = [];

let initialPipes = 5;

​

function setup() {

  createCanvas(400, 400);   

  xo = width/4;  

  yo = 100;

  getPipes();  

  circle(xo, yo, 10);  

}

​

function draw() {

  //background(0, 0, 255, 50);

  background(0, 0, 255);

  updateVelocityAndPosition(); 

  updatePipes();

  checkPipesArray();

  checkFall();

  checkCollision();

  checkVelocity();

  drawPipes();

  drawBird();  

  drawScore();

}

​

function mouseClicked() {      

    vo = - abs(clickVelocity);        

}

​

​

function keyPressed(){

  if (key == ' ') {

    vo = clickVelocity;   

  }

}

​

function checkVelocity() {  

  velocity = 2 + Math.floor(score/10);

  if (velocity > 5) {

    velocity = 5;

  }  

}

​

function checkCollision() {

  let nextPipe = null;

//   if(firstPipe) {

//     nextPipe = pipes[0];

//     if( (xo + r >= nextPipe.upperPipe.x) && (xo - r <= (nextPipe.upperPipe.x + pipeWidth))) {

//       if(yo + r > nextPipe.lowerPipe.y || yo - r < nextPipe.upperPipe.height) {

//        console.log("bateu");

//        restart();

//      }      

//     }

//     if( xo - r > pipes[0].upperPipe.x + pipeWidth) {

//       firstPipe = false;

//       score++;        

//     }    

//   } else {

    nextPipe = pipes[0]; //se a distancia for menor que 150, usar pipes[1]

    if( (xo + r >= nextPipe.upperPipe.x) && (xo - r <= (nextPipe.upperPipe.x + pipeWidth))) {

      if(yo + r > nextPipe.lowerPipe.y || yo - r < nextPipe.upperPipe.height) {

       console.log("bateu");

       restart();   

     }      

    }

    //tentar usar >=

    if( xo - r == nextPipe.upperPipe.x + pipeWidth) {      

      score++;             

    }         

  // }      

}

​

function checkFall() {

  if(yo > height) {

    restart();

  }

}

​

function restart() {  

  pipes = [];

  yo = 100;

  a = 0.3;

  velocity = 2;

  vo = 0;

  score = 0;

  getPipes();  

  circle(xo, yo, 10);     

}

​

function checkPipesArray() {

  if(pipes[0].upperPipe.x < - pipes[0].upperPipe.width) {

    //menor que o negativo do cumprimento, ou seja, todo pipe saiu da tela

    pipes.shift();

    let lastX = pipes[pipes.length - 1].upperPipe.x;

    upper = new Pipe(

      lastX + distanceBetweenPipes,

      0,

      pipeWidth, 

      randomInteger(borderDist, height-borderDist-gapDist));

    lower = new Pipe(

      lastX + distanceBetweenPipes, 

      upper.height + gapDist, 

      pipeWidth, 

      height);

    tempPipes = new Pipes(upper, lower);

    pipes.push(tempPipes);        

  }

}

​

function drawBird() {  

  fill(255, 0, 0); 

  circle(xo, y, d);  

}

​

function updatePipes() {

  for(let i=0; i<pipes.length; i++) {

    pipes[i].upperPipe.x -= velocity;

    pipes[i].lowerPipe.x -= velocity;

  }    

}

​

function drawPipes() {

  for(let i=0; i<pipes.length; i++) {

    pipes[i].upperPipe.drawPipe();

    pipes[i].lowerPipe.drawPipe();

  }    

}

​

function updateVelocityAndPosition() {  

  v = vo + a*dt;

  y = yo + v*dt;     

  vo = v;

  yo = y;     

  //velocity += increaseRate;

}

​

function getPipes() {  

  for(let i = 1; i <= initialPipes; i++) {

    upper = new Pipe(

      width/2+distanceBetweenPipes*i,

      0,

      pipeWidth, 

      randomInteger(borderDist, height-borderDist-gapDist));

    lower = new Pipe(

      width/2+distanceBetweenPipes*i, 

      upper.height + gapDist, 

      pipeWidth, 

      height);

    tempPipes = new Pipes(upper, lower);

    pipes.push(tempPipes);

  }  

}

​

class Pipe {  

  constructor(x, y, width, height) {

    this.x = x;

    this.y = y;

    this.width = width;

    this.height = height

  }

  drawPipe() {

    fill(0, 255, 0);

    strokeWeight(2);

    rect(this.x, this.y, this.width, this.height);    

  }    

  drawNextPipe() {

    fill(0);

    strokeWeight(2);

    rect(this.x, this.y, this.width, this.height);    

  }    

}

​

class Pipes {  

  constructor(upperPipe, lowerPipe) {

    this.upperPipe = upperPipe;

    this.lowerPipe = lowerPipe;

  }    

}

​

function randomInteger(min, max) {

  return Math.floor(Math.random() * (max - min + 1)) + min;

}

​

function drawScore() {

  fill(255);

  rect(width*0.45, height*0.05, width*0.1, width*0.1);

  textAlign(CENTER, TOP);

  fill(0);

  textSize(30);

  text(score, width*0.5, height*0.07);   

}

​

​