Project – 11 – Landscape

//Dreami Chambers; Section C; dreamic@andrew.cmu.edu; Assignment-11-Project

var stars = []
var planets = []
var moon = []
var noiseParam = 0
var noiseStep = 0.1
var sky
var astronaut
var planet
var meteor 
var mx = 300
var my = 0
var mdx
var mdy
var ax = 0
var ay = 100
var ady = 1
var frameCount = 0

function preload() { 
	sky=loadImage("https://i.imgur.com/zfE0rbY.jpg")
	astronaut=loadImage("https://i.imgur.com/0GaKn9k.png")
	planet=loadImage("https://i.imgur.com/UCrpkmB.png")
	meteor=loadImage("https://i.imgur.com/gcfvaqR.png")
} 

function setup() {
    createCanvas(400, 300)
    //meteor velocity
	mdx = random(-10,-15)
	mdy = random(10,15)
    //stars setup
    for (var i = 0; i < 100; i++) {
    	var rx = random(width)
    	var ry = random(height)
    	var rdx = random(4)
        stars[i] = makeStars(rx, ry, 2, rdx)
    }
    //planets setup
    for (var j = 0; j < 2; j++) {
    	var rx = random(width)
    	var ry = random(150)
        planets[j] = makePlanets(rx, ry)
    }
    //moon surface setup
    for (var k = 0; k < width; k++){
		var n = noise(noiseParam)
		var value = map(n, 0, 1, 10, 50)
		moon.push(value)
		noiseParam += noiseStep
	}
    frameRate(10)
}

function draw() {
	image(sky, 0, 0, 400, 400)

	//draws stars
	starUpdate()
	starsRemove()
	starsAdd()

	//draws planets
	planetUpdate()
	planetsRemove()
	planetsAdd()
	
	//draws moving meteor
	drawMeteor(mx, my, mdx, mdy)

	//draws moon surface
	drawMoon()

	//draws astronaut
	drawAstronaut(ax, ay)

	//moves meteors across screen
	mx+=mdx
	my+=mdy

	//moves astronaut up and down
	ay+=ady
	if (ay > 110){
		ady*=-1
	}
	if (ay < 90){
		ady*=-1
	}
	frameCount++
}

function drawAstronaut(x, y){
	image(astronaut, x, y, 55, 60)
}

function drawMoon(){
	stroke(200, 180, 200)
	strokeWeight(200)
	moon.shift()
	var n = noise(noiseParam)
	var value = map(n, 0, 1, 10, 50)
	moon.push(value)
	noiseParam += noiseStep
	for (var i=0; i < width; i++){
		line(i*15, 300+moon[i], (i+1)*15, 300+moon[i+1])
	}
}

function drawMeteor(x, y, dx, dy){
	image(meteor, x, y, 50, 45)
}

//star functions
function starUpdate(){
	for (var i = 0; i < stars.length; i++){
        stars[i].stepFunction()
        stars[i].drawFunction()
	}
}

function starsRemove(){
	starsToKeep = []
	for (var i = 0; i < stars.length; i++){
        if (stars[i].x + stars[i].size > 0){
        	starsToKeep.push(stars[i])
        }
	}
	stars = starsToKeep
}

function starsAdd(){
	var starProb = 0.5
	if (random(1) < starProb){
		stars.push(makeStars(random(width, 410), random(200), 2, random(4)))
	}
}

function starStep() {
    this.x -= this.dx
}

function starDraw() {
	stroke(this.c)
	strokeWeight(this.size)
	point(this.x, this.y)
}

function makeStars(px, py, pdx, ps) {
	var s = {x: px, y: py, dx: pdx, 
		size: ps, c: color(random(150, 230),random(100, 140),random(200, 255)),
		drawFunction: starDraw, stepFunction: starStep
	}
	return s
}

//planet functions
function planetUpdate(){
	for (var i = 0; i < 2; i++){
        planets[i].stepFunction()
        planets[i].drawFunction()
	}
}

function planetsRemove(){
	planetsToKeep = []
	for (var i = 0; i < planets.length; i++){
        if (planets[i].x + planets[i].size > 0){
        	planetsToKeep.push(planets[i])
        }
	}
	planets = planetsToKeep
}

function planetsAdd(){
	var planetsProb = 0.3
	if (random(0, 1) < planetsProb){
		planets.push(makePlanets(random(width, 450), random(150)))
	}
}

function planetStep() {
    this.x -= this.dx
}

function planetDraw() {
	image(planet, this.x, this.y, this.size, this.size)
}

function makePlanets(px, py) {
	var p = {x: px, y: py, dx: 2, 
		size: random(10,60), c: color(random(200,200),random(140,170),random(140,170)),
		drawFunction: planetDraw, stepFunction: planetStep
	}
	return p
}