//noise for minigun and multishot

//different enemies (higher health)

//sprites (items,player,enemies,attacks)

//background (noise generated, stars and planets or surface of planet)

//waves: progression of enemies and background 

//item:self destruct

//score board

//--------------------\\

​

function borderCheck(pos){

  if(pos.x >= 0 && pos.x <= width && pos.y >= 0 && pos.y <= height){

    return true;

  }else{

    return false;

  }

}

​

let ship;

let bullets = [];

let enemies = [];

let items = [];

​

let spawnEnemyRate = 0.01; 

let enemyCap = 150;

let spawnItemRate = 0.4;

let score = 0;

let time = 0;

const speed = 1;

​

let singlePew;

let multiPew;

​

//load sound

function preload(){

  singlePew = loadSound('Sounds/single_shot.mp3');

  multiPew = loadSound('Sounds/multiple_shot.mp3');

}

​

function setup() {

  createCanvas(windowWidth,windowHeight);

}

​

function playPew(s){

  //if(!s.isPlaying()){

    s.play();

  //}

}

​

//player movement

function getMovements(){

  let movement = createVector();

  if(keyIsDown(65)){

    //A

    movement.x = -speed;

  }

  if(keyIsDown(68)){

    //D

    movement.x = speed;

  }

  if(keyIsDown(87)){

    //W

    movement.y = -speed;

  }

  if(keyIsDown(83)){

    //S

    movement.y = speed;

  }

  ship.move(movement);

}

​

//shooting and pewpewpewpwepwepwpepwepwpe

function mousePressed(){

  if(ship.alive){

    playPew(singlePew);

​

    bullets.push(new Bullet(ship.pos.x,ship.pos.y,ship.heading));

​

    //add more bullets for multishot

    if(ship.multishot){

      playPew(singlePew);

      playPew(singlePew);

​

      bullets.push(new Bullet(ship.pos.x,ship.pos.y,ship.heading+0.5));

      bullets.push(new Bullet(ship.pos.x,ship.pos.y,ship.heading-0.5));

    }

  }

}

​

//spawn enemies. Ramps up with frames

function spawnEnemy(){

  if(frameCount % 500 == 0){

    spawnEnemyRate += 0.01;

    //console.log('spawn rate increased: ',spawnRate);

  }

  if(enemies.length <= enemyCap){

    if(random(1) < spawnEnemyRate){

      let ran = random(1);

      let x,y;

      let furthestSpawn = 30;

​

      if(ran <=1/4){

        //top

        x = random(width);

        y = random(-furthestSpawn,0);

      }else if(ran <=2/4){

        //bottom

        x = random(width);

        y = random(height,height+furthestSpawn);

      }else if(ran <=3/4){

        //left

        x = random(-furthestSpawn,0);

        y = random(height);

      }else if(ran <=4/4){

        //right

        x = random(width,width+furthestSpawn);

        y = random(height);

      }

      enemies.push(new Enemy(x,y))

    }

  }

}

​

//spawn items

function spawnItem(){

  if(frameCount % 500 == 0){

    spawnItemRate += 0.05;

  }

  if(items.length <= 3){

    if(frameCount % 250 == 0){

      if(random(1) < spawnItemRate){

        items.push(new Item());

      }

    }

  }

}

​

let startGame = true; 

​

function draw() {

  if(startGame){

    initGame();

    playGame();

    startGame = false;

  }

  // if(ship.alive){

  //   playGame();

  // }else{

  //   noLoop();

  //   textSize(50);

  //   stroke(255,0,0);

  //   fill(255,0,0);

  //   text("Get Good",width/2-110,height/2);

  // }

}

​

function initGame(){

  let bullets = [];

  let enemies = [];

  let items = [];

  ship = new player(width/2,height-100);

  items.push(new Item());

}

​

function playGame(){

  while(ship.alive){

    background(0);

    spawnEnemy();

    spawnItem();

    getMovements();

​

    //minigun

    if(ship.minigun){

      bullets.push(new Bullet(ship.pos.x,ship.pos.y,ship.heading+random(-0.1,0.1)));

      playPew(singlePew);

      //multishot

      if(ship.multishot){

        bullets.push(new Bullet(ship.pos.x,ship.pos.y,ship.heading+0.5+random(-0.1,0.1)));

        bullets.push(new Bullet(ship.pos.x,ship.pos.y,ship.heading-0.5+random(-0.1,0.1)));

      }

​

      //knockback

      let oppDir = p5.Vector.fromAngle(ship.heading+PI);

      oppDir.normalize();

​

      if(ship.multishot){

        oppDir.mult(0.75);

      }else{

        oppDir.mult(0.25);

      }

      ship.move(oppDir);

    }

​

    //----Items----\\

    for(let i = items.length - 1; i >= 0; i--){

      let item = items[i];

      item.show();

​

      //item goes away and does action

      if(!item.alive){

        item.action(ship);

        items.splice(i,1);

      }

    }

​

    //----Bullets----\\

    for(let i = bullets.length - 1; i >= 0; i--){

      let bullet = bullets[i];

​

      bullet.update();

      bullet.show();

​

      //check for enemy-bullet collusion

      for(let enemy of enemies){

        if(bullet.collision(enemy)){

          bullets.splice(i,1);

          enemy.alive = false;

          score++;

        }

      }

​

      //remove bullet

      if(!bullet.alive){

        bullets.splice(i,1);

      }

    }

​

    //----Ship----\\

    if(ship.health <= 0){

      ship.alive = false;

    }

​

    ship.update();

    ship.show();

​

    //colide with enemy

    for(let enemy of enemies){

      if(ship.collision(enemy)){

        enemy.alive = false;

        if(ship.shield){

          ship.shield = false;

        }else{

          ship.health --;

        }

      }

    }

​

    //collide with item

    for(let item of items){

      if(ship.collision(item)){

        item.alive = false;

      }

    }

​

    //----Enemy----\\

    for(let i = enemies.length - 1; i >=0; i--){

      let enemy = enemies[i];

      if(enemy.alive){

        enemy.arrive(ship.pos);

        enemy.update();

        enemy.display();

      }else{

        enemies.splice(i,1);  

      }

    }

​

​

    //----Text----\\\

    textSize(15);

    stroke(255);

    fill(0);

    text("Score: "+score,10, 20);

    text("Health: "+ship.health,10,height-10);

    let fps = frameRate().toFixed(2);

    text("FPS: "+fps,width-90,20)

  }

}