Project-11

var buildings = [];
var people = [];
var hillVar= 0.009

function setup() {
    createCanvas(480, 480); 
    
    // create an initial collection of buildings
    for (var i = 0; i < 10; i++){
        var rx = random(width);
        var ry = random(10, 50);
        buildings[i] = makeBuilding(rx);
        people[i] = makePeople(rx);
    }
    frameRate(10);
}


function draw() {
    background(33, 28, 77);
    drawHill() 


    
    displayStatusString();
    displayHorizon();

    updateAndDisplayBuildings();
    removeBuildingsThatHaveSlippedOutOfView();
    addNewBuildingsWithSomeRandomProbability(); 

    updateAndDisplayPeople();
    removePeople();
    addNewPeople()

    drawTrainCart()
}

function makePeople(birthLocationX) {
  var k ={x: birthLocationX,
    breadth:round(random(9,15)),
    speed:-4,
    peopleHeight:round(random(24,30)),
    move:peopleMove,
    display:peopleDisplay,
    color:color(random(50,240),random(50,240),random(50,240))}
    return k 
}

function peopleMove() {
  this.x += this.speed
}

function peopleDisplay() {
  push();
  fill(this.color)
  translate(this.x, height-190);
  strokeWeight(1);
  stroke(0);
  ellipse(-0,this.peopleHeight/2,this.breadth,this.peopleHeight) //body
  fill(160)
  ellipse(0,-this.peopleHeight/2+13,8,8) //head
  pop()
}

function updateAndDisplayPeople(){
  for (var i = 0; i <people.length; i++){
    people[i].move();
    people[i].display()
  }
}
function removePeople(){
  var peopleToKeep = [];
  for (var i = 0; i <people.length; i++){
    if (people[i].x+people[i].breadth>0){
      peopleToKeep.push(people[i])
    }
  }
  people = peopleToKeep
}

function addNewPeople(){
  var newPeopleLikelihood=0.1;
  if(random(0,1)<newPeopleLikelihood){
    people.push(makePeople(width));
  }
}

function drawTrainCart(){
  noStroke()
  var cartwidth = 70
  fill(66, 85, 102)
  rect(0,0,cartwidth,height)
  rect(480-cartwidth,0,cartwidth,height)
  rect(cartwidth,0,width-(cartwidth*2),50)
  fill(161, 104, 80)
  quad(cartwidth,height-120,width-cartwidth,height-120,480,480,0,480)
  

  push()
  //drink
  fill(232, 184, 100)
  quad(320,460-10,315,430-10,365,430-10,360,460-10)
  arc(340,460-10,40,13,0,PI,OPEN)
  fill(210, 184, 100)
  ellipse(340,430-10,50,15)

  //cup
  fill(255,255,255,80);
  quad(320,460-10,310,400-10,370,400-10,360,460-10)
  stroke(174, 203, 230)
  strokeWeight(4)
  line(320,460-10,310,400-10)
  line(370,400-10,360,460-10)
  arc(340,460-10,40,13,0,PI,OPEN)
  fill(191,151,135)
  ellipse(340,400-10,60,17)

  noStroke()
  fill(255, 246, 199,32)
  quad(140,0,340,0,500,480,-20,480)

  pop()


 }

function drawHill() {
  push()
  noStroke()
  fill(6, 31, 12)
  beginShape()
  for (var h = 0; h<width; h++){
    var a = (h*hillVar)+(millis()*0.0002)
    var y = map(noise(a),0,1,height/8,height/9*5);
    vertex(h,y)
  }
  vertex(480,480);
  vertex(0,480)
  endShape()
  pop()
}

function updateAndDisplayBuildings(){
    // Update the building's positions, and display them.
    for (var i = 0; i < buildings.length; i++){
        buildings[i].move();
        buildings[i].display();
        //trees[i].move();
        //trees[i].display();
    }
}


function removeBuildingsThatHaveSlippedOutOfView(){
    // If a building has dropped off the left edge,
    // remove it from the array.  This is quite tricky, but
    // we've seen something like this before with particles.
    // The easy part is scanning the array to find buildings
    // to remove. The tricky part is if we remove them
    // immediately, we'll alter the array, and our plan to
    // step through each item in the array might not work.
    //     Our solution is to just copy all the buildings
    // we want to keep into a new array.
    var buildingsToKeep = [];
    for (var i = 0; i < buildings.length; i++){
        if (buildings[i].x + buildings[i].breadth > 0) {
            buildingsToKeep.push(buildings[i]);
        }
    }
    buildings = buildingsToKeep; // remember the surviving buildings
}


function addNewBuildingsWithSomeRandomProbability() {
    // With a very tiny probability, add a new building to the end.
    var newBuildingLikelihood = 0.008; 
    if (random(0,1) < newBuildingLikelihood) {
        buildings.push(makeBuilding(width));
    }
}


// method to update position of building every frame
function buildingMove() {
    this.x += this.speed;
}
    

// draw the building and some windows
function buildingDisplay() {
  push()
    var floorHeight = 20;
    var bHeight = this.nFloors * floorHeight; 
    fill(12, 12, 51); 
    stroke(185); 
    push();
    translate(this.x, height - 170);
    rect(0, -bHeight, this.breadth, bHeight);
    noStroke()
    triangle(0,-bHeight+1,0+(this.breadth/2),-bHeight-10,this.breadth,-bHeight+1)
    stroke(200); 
    for (var i = 0; i < this.nFloors; i++) {
      fill(247, 235, 111)
      strokeWeight(random(0.1,2))
      rect(5, -15 - (i * floorHeight), this.breadth - 10,5);
    }
    strokeWeight(3)
    line(0+(this.breadth/2),-bHeight-10,this.breadth+5,-bHeight+1)
    line(0+(this.breadth/2),-bHeight-10,-5,-bHeight+1)
    pop();
}



function makeBuilding(birthLocationX) {
    var bldg = {x: birthLocationX,
                breadth: 50,
                speed: -3.0,
                nFloors: round(random(2,8)),
                move: buildingMove,
                display: buildingDisplay}
    return bldg;
}


function displayHorizon(){
    stroke(0);
    line (0,height-170, width, height-170); 
    fill(40, 40, 41)
    rect(0,height-170,width,170)
}


function displayStatusString(){
    noStroke(); 
    fill(0); 
    var statusString = "# Buildings = " + buildings.length;
    text(statusString, 5,20); 
}