I need to complete an asteroids game clone and complete it with realistic movement, gravity and collision detection checks.

Most of code is created (see below). Use p5.js libraries, Javascript, VS code with Brackets extension. I am providing steps that needs be completed and in code will it indicate where the code needs be added.

1. spaceship.js - code has been completed.

2. bulletsystem.js - code has been completed

3. sketch.js - collision detection parts require assistance. Please assist with code - and be specific as I am a beginner learner. It is lines 48 - 71. Thank you.

4. add the following 2 extensions (PLEASE ASSIST)

- Make the spaceship pretty by adding jets thrusters which activate from the opposite side of movement just like on a real spaceship.

- Keep score of how many asteroids you have hit.

Thank you

I have included the following code: bulletSystem.js, spaceship.js, sketch.js, asteroidSystem.js, index.html.

THANK you!

ps - unfortunately cannot attach gif file

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sketch.js (this is the code file which I need assistance with)

>>>>>>>>>>

var spaceship;

var asteroids;

var atmosphereLoc;

var atmosphereSize;

var earthLoc;

var earthSize;

var starLocs = [];

//////////////////////////////////////////////////

function setup() {

createCanvas(1200,800);

spaceship = new Spaceship();

asteroids = new AsteroidSystem();

//location and size of earth and its atmosphere

atmosphereLoc = new createVector(width/2, height*2.9);

atmosphereSize = new createVector(width*3, width*3);

earthLoc = new createVector(width/2, height*3.1);

earthSize = new createVector(width*3, width*3);

}

//////////////////////////////////////////////////

function draw() {

background(0);

sky();

spaceship.run();

asteroids.run();

drawEarth();

checkCollisions(spaceship, asteroids); // function that checks collision between various elements

}

//////////////////////////////////////////////////

//draws earth and atmosphere

function drawEarth(){

noStroke();

//draw atmosphere

fill(0,0,255, 50);

ellipse(atmosphereLoc.x, atmosphereLoc.y, atmosphereSize.x, atmosphereSize.y);

//draw earth

fill(100,255);

ellipse(earthLoc.x, earthLoc.y, earthSize.x, earthSize.y);

}

//////////////////////////////////////////////////

//checks collisions between all types of bodies

function checkCollisions(spaceship, asteroids){

//spaceship-2-asteroid collisions

//YOUR CODE HERE (2-3 lines approx)

//asteroid-2-earth collisions

//YOUR CODE HERE (2-3 lines approx)

//spaceship-2-earth

//YOUR CODE HERE (1-2 lines approx)

//spaceship-2-atmosphere

//YOUR CODE HERE (1-2 lines approx)

//bullet collisions

//YOUR CODE HERE (3-4 lines approx)

}

//////////////////////////////////////////////////

//helper function checking if there's collision between object A and object B

function isInside(locA, sizeA, locB, sizeB){

// YOUR CODE HERE (3-5 lines approx)

}

//////////////////////////////////////////////////

function keyPressed(){

if (keyIsPressed && keyCode === 32){ // if spacebar is pressed, fire!

spaceship.fire();

}

}

//////////////////////////////////////////////////

// function that ends the game by stopping the loops and displaying "Game Over"

function gameOver(){

fill(255);

textSize(80);

textAlign(CENTER);

text("GAME OVER", width/2, height/2)

noLoop();

}

//////////////////////////////////////////////////

// function that creates a star lit sky

function sky(){

push();

while (starLocs.length

starLocs.push(new createVector(random(width), random(height)));

}

fill(255);

for (var i=0; i

rect(starLocs[i].x, starLocs[i].y,2,2);

}

if (random(1)

pop();

}

--------------------------------------------------------------------------------------

asteroidSystem.js

>>>>>>>>>>>>>

class AsteroidSystem {

//creates arrays to store each asteroid's data

constructor(){

this.locations = [];

this.velocities = [];

this.accelerations = [];

this.diams = [];

}

run(){

this.spawn();

this.move();

this.draw();

}

// spawns asteroid at random intervals

spawn(){

if (random(1)

this.accelerations.push(new createVector(0,random(0.1,1)));

this.velocities.push(new createVector(0, 0));

this.locations.push(new createVector(random(width), 0));

this.diams.push(random(30,50));

}

}

//moves all asteroids

move(){

for (var i=0; i

this.velocities[i].add(this.accelerations[i]);

this.locations[i].add(this.velocities[i]);

this.accelerations[i].mult(0);

}

}

applyForce(f){

for (var i=0; i

this.accelerations[i].add(f);

}

}

//draws all asteroids

draw(){

noStroke();

fill(200);

for (var i=0; i

ellipse(this.locations[i].x, this.locations[i].y, this.diams[i], this.diams[i]);

}

}

//function that calculates effect of gravity on each asteroid and accelerates it

calcGravity(centerOfMass){

for (var i=0; i

var gravity = p5.Vector.sub(centerOfMass, this.locations[i]);

gravity.normalize();

gravity.mult(.001);

this.applyForce(gravity);

}

}

//destroys all data associated with each asteroid

destroy(index){

this.locations.splice(index,1);

this.velocities.splice(index,1);

this.accelerations.splice(index,1);

this.diams.splice(index,1);

}

}

----------------------------------------------

bulletSystem.js

>>>>>>>>>>>>>>

class BulletSystem {

constructor(){

this.bullets = [];

this.velocity = new createVector(0, -5);

this.diam = 10;

}

run(){

this.move();

this.draw();

this.edges();

}

fire(x, y){

this.bullets.push(createVector(x,y));

}

//draws all bullets

draw(){

fill(255);

for (var i=0; i

ellipse(this.bullets[i].x, this.bullets[i].y, this.diam, this.diam);

}

}

//updates the location of all bullets

move(){

for (var i=0; i

this.bullets[i].y += this.velocity.y;

}

}

//check if bullets leave the screen and remove them from the array

edges(){

// YOUR CODE HERE (3 lines approx)

for (let i = 0; i

if (this.bullets[i].x width || this.bullets[i].y height) {

this.bullets.splice(i, 1);

i--;

}

}

}

}

-----------------------------------------------------

spaceship.js

>>>>>>>>>>>

class Spaceship {

constructor(){

this.velocity = new createVector(0, 0);

this.location = new createVector(width/2, height/2);

this.acceleration = new createVector(0, 0);

this.maxVelocity = 2; // redcued from 5 to 2, otherwise diagonal movement too much

this.bulletSys = new BulletSystem();

this.size = 50;

}

run(){

this.bulletSys.run();

this.draw();

this.move();

this.edges();

this.interaction();

}

draw(){

fill(125);

triangle(this.location.x - this.size/2, this.location.y + this.size/2,

this.location.x + this.size/2, this.location.y + this.size/2,

this.location.x, this.location.y - this.size/2);

}

move(){

// YOUR CODE HERE (4 lines)

this.velocity.add(this.acceleration);

this.velocity.limit(this.maxVelocity);

this.location.add(this.velocity);

this.acceleration.set(0, 0);

}

applyForce(f){

this.acceleration.add(f);

}

interaction(){

if (keyIsDown(LEFT_ARROW)){

this.applyForce(createVector(-0.1, 0));

}

if (keyIsDown(RIGHT_ARROW)){

// YOUR CODE HERE (1 line)

this.applyForce(createVector(0.1, 0));

}

if (keyIsDown(UP_ARROW)){

// YOUR CODE HERE (1 line)

this.applyForce(createVector(0, -0.1));

}

if (keyIsDown(DOWN_ARROW)){

// YOUR CODE HERE (1 line)

this.applyForce(createVector(0, 0.1));

}

}

fire(){

this.bulletSys.fire(this.location.x, this.location.y);

}

edges(){

if (this.location.x

else if (this.location.x>width) this.location.x = 0;

else if (this.location.y

else if (this.location.y>height) this.location.y = 0;

}

setNearEarth(){

//YOUR CODE HERE (6 lines approx)

var G = 6.67408e-11; // gravitational constant

var mass1 = 5.972e24; // mass of earth in kilograms

var mass2 = 1000; // mass of spaceship in kilograms

var distance = this.location.dist(earthLoc); // distance between spaceship and earth

var force = G * mass1 * mass2 / (distance * distance); // gravitational force between spaceship and earth

var forceVector = p5.Vector.sub(earthLoc, this.location); // vector pointing from spaceship to earth

forceVector.setMag(force); // set magnitude of vector to force

this.applyForce(forceVector); // apply force to spaceship

this.velocity.setMag(this.maxVelocity); // set magnitude of velocity to maxVelocity

}

}

---------------------------------------------------

index.html

>>>>>>>>>

GAME OVER