Project 11

function setup() {
    createCanvas(400,400);
    // create an initial collection of buildings
    for (var i = 0; i < 4; i++){
        var cx = random(width);
        var cy = random(320,350)
        cars[i] = makeCar(cx,cy,color(random(255),random(255),random(255)),random(25,45));
    }
    for (var i = 0; i < 3; i++){
        var bx = random(width);
        var by = random(20,150)
        birds[i] = makeBird(bx,by,color(random(255),random(255),random(255)));
    }
    frameRate(10);
}
var cars = [];
var birds = [];
function draw() {
    push()
    fill(170,170,255)
    rect(0,0,400,270)
    fill(0,170,0)
    rect(0,270,400,130)
    drawRoad()
    drawSun()
    for (i=0; i<=50; i++){
        drawTree(i*50+20,260)  
    }
    updateAndDisplayCars();
    removeCarsThatHaveSlippedOutOfView();
    addNewCarsWithSomeRandomProbability();
    updateAndDisplayBirds(); 
    removeBirdsThatHaveSlippedOutOfView();
    addNewBirdsWithSomeRandomProbability();
}
function drawSun(){
    fill(255,200,0)
    ellipse(0,0,100,100)
}
function drawTree(x,y){
    fill(0,255,0)
    triangle(x,y,x-7,y+15,x+7,y+15)
    fill(50,30,0)
    rect(x-2,y+15,4,10)
}
function drawRoad(){
    fill(0)
    rect(0,300,400,60)
    fill(255,255,0)
    for (i = 0; i <= 10; i++){
        rect(50*i+15,325,20,5)
    }
}
function removeCarsThatHaveSlippedOutOfView(){
    var carsToKeep = [];
    for (var i = 0; i < cars.length; i++){
        if (cars[i].x > 0) {
            carsToKeep.push(cars[i]);
        }
        print(cars[i])
    }
    cars = carsToKeep; // remember the surviving cars

}
function updateAndDisplayCars(){
    // Update the cars's positions, and display them.
    for (var i = 0; i < cars.length; i++){
        cars[i].move();
        cars[i].display();
    }
}
function addNewCarsWithSomeRandomProbability() {
    // With a probability, add a new car to the end.
    var newCarLikelihood = 0.05; 
    if (random(0,1) < newCarLikelihood) {
        cars.push(makeCar(0,random(305,345),color(random(255),random(255),random(255)),random(25,45)));
    }
}

// method to update position of cars every frame
function carMove() {
    this.x += this.speed;
}
// draw the cars
function carDisplay() {
    push()
    fill(this.c)
    rect(this.x,this.y,this.l,10)
    rect(this.x+8,this.y-10,14,10)
    ellipse(this.x+11,this.y+8,10,10)
    ellipse(this.x+26,this.y+8,10,10)
    pop()
}
//make new car with different XY location, color, length, and speed
function makeCar(birthLocationX,birthLocationY,color,carLength) {
    var car = {x: birthLocationX,
                y: birthLocationY,
                c: color,
                l: carLength,
                speed: random(2,10),
                move: carMove,
                display: carDisplay}
    return car;
}
function removeBirdsThatHaveSlippedOutOfView(){
    var birdsToKeep = [];
    for (var i = 0; i < birds.length; i++){
        if (birds[i].x > 0) {
            birdsToKeep.push(birds[i]);
        }
        print(birds[i])
    }
    birds = birdsToKeep; // remember the surviving cars
}
function updateAndDisplayBirds(){
    // Update the cars's positions, and display them.
    for (var i = 0; i < birds.length; i++){
        birds[i].move();
        birds[i].display();
    }
}
function addNewBirdsWithSomeRandomProbability() {
    // With a probability, add a new bird to the end.
    var newBirdLikelihood = 0.05; 
    if (random(0,1) < newBirdLikelihood) {
        birds.push(makeBird(width,random(20,160),color(random(255),random(255),random(255))));
    }
}

// method to update position of birds every frame
function birdMove() {
    this.x -= this.speedX;
    this.y += this.speedY
}
// draw the birds
function birdDisplay() {
    push()
    fill(this.c)
    triangle(this.x,this.y,this.x+6,this.y+1.5,this.x+6,this.y-1.5)//beak
    ellipse(this.x+9,this.y,7,7) //head
    ellipse(this.x+17,this.y+4,15,8)//body
    arc(this.x+18, this.y, 10, 10, -0.7, PI-0.7,CHORD)//wings
    ellipse(this.x+8,this.y-1,1,1)//eyes
    pop()
}
//make new bird with different location, color, speedXY
function makeBird(birthLocationX,birthLocationY,color) {
    var bird = {x: birthLocationX,
                y: birthLocationY,
                c: color,
                speedX: random(5,8),
                speedY: random(-1.5,1.5),
                move: birdMove,
                display: birdDisplay}
    return bird;
}