Space battle

The spaceship engages in fights with enemies by using energy machine guns and lasers. The most challenging part actually comes in making all the visuals work correctly.

Four characters/sounds:

• Firing spaceship
• Explosion
• Charge laser
• Shoot laser

Space battle

//Jason Jiang
//Section E

///Storyline: The spaceship engages fights with enemies through using energy machine gun and laser.

//setting up variables for stars
var star = [];
var N = 10; //number of starts
var dx = 10; //speed of star
var w = 600; //x location of enemy
var dShip = 10; //speed of enemy
var a = 0;//scale of laser beam
var imgX = 120;//x location of ship
var imgY = 100;//y location of ship
var angle = 0;//angle of ship
var laserCharged = false; //whether laser is charged
var laserFired = false; //whether laser is fired
var enemyDestroyed = false; //whether enemy is destroyed


//defining assets
var machineGun;
var explosion1;
var explosion2;
var explosion3;
var laserEnergy;
var laserBeam;
var flyEngine;
var machineGun;
var explosion;
var charge;
var laser;

//add assets
function preload(){
    spaceShip = loadImage("https://i.imgur.com/D1QDG4A.png");
    spaceShipFire = loadImage("https://i.imgur.com/h8bQMXa.png");
    enemy1 = loadImage("https://i.imgur.com/OE8l2tK.png");
    explosion1 = loadImage("https://i.imgur.com/c9tLLTo.png");
    explosion2 = loadImage("https://i.imgur.com/kLTBXIa.png");
    explosion3 = loadImage("https://i.imgur.com/0zhmrzn.png");
    laserEnergy = loadImage("https://i.imgur.com/bmn9wZX.png");
    laserBeam = loadImage("https://i.imgur.com/ABposfH.png");
    machineGun = loadSound("https://courses.ideate.cmu.edu/15-104/f2022/wp-content/uploads/2022/11/machineGun.mp3");
    explosion = loadSound("https://courses.ideate.cmu.edu/15-104/f2022/wp-content/uploads/2022/11/explosion.wav");
    charge = loadSound("https://courses.ideate.cmu.edu/15-104/f2022/wp-content/uploads/2022/11/charge.wav")
    laser = loadSound("https://courses.ideate.cmu.edu/15-104/f2022/wp-content/uploads/2022/11/laser.wav")
}

// setup for audio generation
function soundSetup() { 
    machineGun.setVolume(0.1);
    explosion.setVolume(0.1);
    charge.setVolume(0.2);
    laser.setVolume(0.1);
}

//Create galaxy background
function updateStar(){
    this.x -= dx;
}

function createStar(){
    strokeWeight(3);
    stroke(255);
    point(this.x, this.y);
}

function generateStar(sx, sy){
   for (var i=0; i<N; i++){
        var s = {
            x: sx, y: sy,
            stepFunction: updateStar,
            drawFunction: createStar
        }

    }
    return s;
} 

function setup() {
    createCanvas(400, 200);
    frameRate(10);
    imageMode(CENTER);
    for (var i=0; i<N; i++){
        var s = generateStar(random(width), random(height))
        star.push(s);
 }
     useSound();
}


function draw() {
    background(0);
    //setting up sequence for charging laser and firing laser
    if (a >= 1){
            if(laserCharged == false){
                laserCharged = true
                a = 0
                charge.stop()
                laser.play();
            }
            else if(laserCharged == true & laserFired == false){
                laserFired = true
                a = 0
                laser.pause();
            }
        }
    //resetting enemy position if destroyed  
    if (enemyDestroyed == true){
            w = 600;
        }

   //Update star
    for (var i=0; i<N; i++){
        var s = star[i]
        s.stepFunction();
        s.drawFunction();
        //Remove star that is out of bounds
        if (s.x < 0) {
            var s = generateStar(random(width+5, width+500), random(height))
            star.splice(i, 1, s);
        }
   
    }
    
    //flying spaceship
    if (frameCount >= 0 & frameCount < 30) { 
        flyinSpace(imgX, imgY, 0); 
    }
    
    //killing enemy
    if (frameCount >= 30 & frameCount < 60) { 
        
        //play ship firing sound
        if (w == 600){
            machineGun.loop();  
        }
        
            //ship firing
            shipFiring(w);
            //enemy Ship approaching
            enemyShip(w, height/2);
            w -= dShip; 
       
    
        }
    
    if (frameCount >= 60 & frameCount < 70) { 
        //stop firing
        flyinSpace(imgX, imgY, 0);
        //play explosion sound when the enemy is close
        if(frameCount == 60){
            machineGun.stop();
            explosion.play()
        }
            explode(w, height/2, 60);
        }
    
    if (frameCount >= 70 & frameCount < 110) { 
        //setting up next enemy
        enemyDestroyed = false;
        if(frameCount == 70){
            charge.loop();
        }

        //dodge laser 
        if(dist(imgX, imgY, 120, 160)>0 & laserCharged == true){
        flyinSpace(imgX, imgY, 0);
        imgY += dShip;  
        }
        else{
            flyinSpace(imgX, imgY, 0);
        }

        //enemy Ship
            enemyShip(w, height/2);
            w -= 0.5*dShip;
        
        //charge laser
        if (laserCharged == false){
            laserCharge(w, height/2, a);
            a+=0.05;
        }
        //fire laser
        else if(laserCharged == true & laserFired == false){
            
            laserCharge(w, height/2, 1);
            laserFire(w, height/2, -a);
            a+=0.05;
        }
    
   
}
        
        if (frameCount >= 110 & frameCount < 140) {
            //preparing for next shot
            if (frameCount == 110){
              laserCharged = false;
              laserFired = false; 
              charge.loop();
            }

            //enemy Ship
            enemyShip(w, height/2);
            w -= 0.5*dShip;
            
            //ship fire laser
            //rotate ship
            if (angle>=-18){
                flyinSpace(imgX, imgY, angle);
                angle-=3;
            }
            //fire laser after rotation
            else{
                //charge laser
                flyinSpace(imgX, imgY, angle)
                if (laserCharged == false){
                    laserCharge(imgX, imgY, a);
                    a+=0.1;
                }
                //fire laser
                else if(laserCharged == true & laserFired == false){
                    
                    laserCharge(imgX, imgY, 1);
                    laserFire(imgX, imgY, a, angle);
                a+=0.1;
            }
             
        }
    }
        
        if (frameCount >= 140 & frameCount < 150) { 
        flyinSpace(imgX, imgY, angle);
        //play explosion sound when the enemy is close
            if(frameCount == 140){
                explosion.play();
            }
            explode(w, height/2, 140);
        }

        if (frameCount >= 150){
            background(0);
            noLoop();
        }
}

//adding spaceship
function flyinSpace(x, y, a){
        push()
        translate(x, y);
        rotate(radians(a));
        image(spaceShip, 0, 0);
        pop()
        
}

function shipFiring(w){
        //ship firing
        if(w%20 == 0){
            image(spaceShipFire, 120, height/2);
        }
        else{
            image(spaceShip, 120, height/2);
        }
    }

function enemyShip(w, h){ 
        //enemy ship flying
            image(enemy1, w, h);
        }

function explode(w, h, f){
        //create explosion when the enemy is close
                image(explosion1, w, h);
                if(frameCount-f >= 3){
                    image(explosion2, w, h);
                }
                if(frameCount-f >= 6){
                    image(explosion3, w, h);
                    enemyDestroyed = true;
                }
        
        }

//adding laser charge
function laserCharge(x, y, a){
        push()
        translate(x, y);
        scale(a);
        image(laserEnergy, 0, 0);
        pop()

}

//adding laser beam
function laserFire(x, y, a, angle){
        push()
        translate(x, y);
        rotate(radians(angle));
        scale(-a, 1);
        image(laserBeam, -211, -0.5);
        pop()

}