alchan-Project 10-Generative Landscape – [OLD FALL 2017] 15-104 • Introduction to Computing for Creative Practice

sunken
var ruins = [];
var farRuins = [];
var fog = [];

var skyColor;


function setup() {
    createCanvas(480,300);
    angleMode(DEGREES);

    for (var c = 0; c < 10; c++) {
      // populate arrays
      var ruinX = random(width);
      var farRuinX = random(width);
      ruins[c] = makeRuin(ruinX);
      farRuins[c] = makeFarRuin(farRuinX);
      for(var d = 0; d<2; d++){
        var fogX = random(width);
        fog[c] = makeFog(fogX);
      }
    }
    skyColor = color(220, 233, 239);

}

function draw() {
  background(skyColor);

  sunDraw();
  sunMove();

  fill(210, 223, 229);
  noStroke();
  rect(0, 180, width, 120);

  // draw the rest of the objects in the scene
  for(var i = 0; i < farRuins.length; i++) {
    farRuins[i].draw();
    farRuins[i].move();
  }

  for(var i = 0; i < ruins.length; i++) {
    ruins[i].draw();
    ruins[i].move();
  }

  for(var i = 0; i < fog.length; i++) {
    fog[i].draw();
    fog[i].move();
  }
}

// FOG
function fogDraw() {
  push();
  translate(this.xPos, this.yOffset);
  stroke(255, 255, 255, 40);
  strokeWeight(this.fHeight);
  line(0, 0, this.fSize, 0);
  pop();
}

// move objects across canvas, when they hit the edge
// move them back to the far edge with randomized attributes
function fogMove() {
  this.xPos += this.speed;
  if(this.xPos < 0 - this.fSize - 30) {
    this.fHeight = random(10, 50);
    this.fSize = random(30, 150);
    this.xPos = width + this.fSize + random(-25, 25);
  }
}

function makeFog() {
  var fog = {xPos: random(width), //, width*4
                 speed: random(-0.4, -0.3),
                 fSize: random(30, 150),
                 fHeight: random(20, 60),
                 yOffset: random(50, height),
                 draw: fogDraw,
                 move: fogMove};
  return fog;
}
// END FOG

// SUN
var sun = {xPos: 20, size: 20, speed:.1};

function sunDraw() {
  var sunColor = color(234, 229, 228);
  noStroke();
  fill(252, 202, 191);
  ellipse(sun.xPos, 60, sun.size);

  // make a gradient, centered around the sun
  for (var s = 0; s <= width; s += 5) {
    var amt = map(s, 0, height, 0, 1);
    var gradient = lerpColor(sunColor, skyColor, amt);
    noFill();
    stroke(gradient);
    strokeWeight(5);
    ellipse(sun.xPos, 60, sun.size + s);
  }
}

function sunMove() {
  sun.xPos += sun.speed;
  if (sun.xPos > width + sun.size) {
    sun.xPos = 0 - sun.size;
  }
}
// END SUN

// RUINS
function ruinDraw(){
  push();
  translate(this.xPos - this.rWidth/2, height-40+this.yPosOffset);
  noStroke();
  fill(245, 245, 255);
  beginShape();
  vertex(0 + this.rWidth/2, 0 + this.yOffset);
  vertex(0 - this.rWidth/2, 0 + this.yOffset);
  vertex(0 - this.rWidth/2 - this.lean, -this.rHeight - this.spike1);
  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight + this.valley1);

  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight - this.spike2);
  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight + this.valley2);

  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight - this.spike2);
  endShape(CLOSE);
  // draw reflections
  scale(1, -1);
  fill(245, 245, 255, 60);
  beginShape();
  vertex(0 + this.rWidth/2, 0 - this.yOffset);
  vertex(0 - this.rWidth/2, 0 - this.yOffset);
  vertex(0 - this.rWidth/2 - this.lean, -this.rHeight - this.spike1);
  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight + this.valley1);

  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight - this.spike2);
  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight + this.valley2);

  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight - this.spike2);
  endShape(CLOSE);
  pop();
}

// move objects across canvas, when they hit the edge
// move them back to the far edge with randomized attributes
function ruinMove(){
  this.xPos += this.speed;
  if (this.xPos < 0 - this.rWidth) {
    this.rHeight = random(15, 40);
    this.rWidth = random(10, 60);
    this.lean = random(0, 20);
    this.xPos = width + this.rWidth + this.lean + random(-5, 50);
  }
}

function makeRuin(x) {
  var ruin = {xPos: x,
              rHeight: random(15, 60),
              rWidth: random(10, 80),
              lean: random(0, 20),
              spike1: random(0, 10),
              valley1: random(0, 10),
              spike2: random(0, 10),
              valley2: random(0, 10),
              spike3: random(0, 10),
              valley3: random(0, 10),
              yOffset: random(-5, 5),
              yPosOffset: random(-15, 15),
              speed: random(-.4, -.5),
              draw: ruinDraw,
              move: ruinMove}
  return ruin;
}
// END RUINS

// FAR RUINS
function farRuinDraw(){
  push();
  translate(this.xPos - this.rWidth/2, height-90);
  noStroke();
  fill(233, 237, 244);
  beginShape();
  vertex(0 + this.rWidth/2, 0 + this.yOffset);
  vertex(0 - this.rWidth/2, 0 + this.yOffset);
  vertex(0 - this.rWidth/2 - this.lean, -this.rHeight - this.spike1);
  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight + this.valley1);

  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight - this.spike2);
  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight + this.valley2);

  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight - this.spike2);
  endShape(CLOSE);
  // draw reflections
  fill(233, 237, 244, 60);
  scale(1, -1);
  beginShape();
  vertex(0 + this.rWidth/2, 0 - this.yOffset);
  vertex(0 - this.rWidth/2, 0 - this.yOffset);
  vertex(0 - this.rWidth/2 - this.lean, -this.rHeight - this.spike1);
  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight + this.valley1);

  vertex(0 - this.rWidth/2 + this.valley1, -this.rHeight - this.spike2);
  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight + this.valley2);

  vertex(0 - this.rWidth/2 + this.valley1 + this.valley2, -this.rHeight - this.spike2);
  endShape(CLOSE);
  pop();
}

// move objects across canvas, when they hit the edge
// move them back to the far edge with randomized attributes
function farRuinMove(){
  this.xPos += this.speed;
  if (this.xPos < 0 - this.rWidth) {
    this.rHeight = random(50, 100);
    this.rWidth = random(40, 100);
    this.lean = random(0, 50);
    this.xPos = width + this.rWidth + this.lean + random(-5, 50);
  }
}

function makeFarRuin(x) {
  var farRuin = {xPos: x,
              rHeight: random(50, 100),
              rWidth: random(40, 100),
              lean: random(0, 50),
              spike1: random(0, 10),
              valley1: random(0, 10),
              spike2: random(0, 10),
              valley2: random(0, 10),
              spike3: random(0, 10),
              valley3: random(0, 10),
              yOffset: random(-15, 15),
              speed: random(-.4, -.2),
              draw: farRuinDraw,
              move: farRuinMove}
  return farRuin;
}
// END FAR RUINS
I wanted to create a landscape that had something to do with water, and ended up going with icebergs or jagged ruins drifting through a pale sea. The size and shape of the icebergs are all randomly determined, as are the fog clouds. I had also wanted to extra “surprise” elements to the landscape (a sunken ship, and a glimpse of a sea serpent) but I ran out of time and wasn’t able to implement them the way I had planned.
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