let gravity;

​

let zOff = 0;

​

let textures = [];

let mountains = [];

let trees = [];

​

function getRandomSnowflake(){

  return random(textures);

}

​

function preload(){

  for(let i = 0; i <= 50; i++){

    textures.push(getSnowflake());

  }

  if(windowWidth < 1300){

    trees.push(tree(50));

    trees.push(tree(-50));

  }else if(windowWidth < 1500){

    trees.push(tree(50));

    trees.push(tree(-50));

    trees.push(tree(50));

  }else{

    trees.push(tree(50));

    trees.push(tree(-50));

    trees.push(tree(50));

    trees.push(tree(-50));

  }

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  gravity = createVector(0,0.3);

  for(let i = 0; i < 300; i++){

    snow.push(new Snowflake());

  }

  let mt0 = (generateMountains(375));

  let mt1 = generateMountains(250);

  let mt2 = generateMountains(100);

  mountains.push(saveMountains(mt0,color(56,56,56)));

  mountains.push(saveMountains(mt1,color(80,80,80)));

  mountains.push(saveMountains(mt2,color(128,128,128)));

}

​

function draw() {

  background(0,0,0);

  dayCycle();

  let layer1 = [];

  let layer2 = [];

  let layer3 = [];

  for(let flake of snow){

    flake.checkEdge();

  }

  for(let flake of snow){

    if(flake.r <= 5){

      layer1.push(flake);

    } else if(flake.r > 5 && flake.r <= 10){

      layer2.push(flake);

    }else{

      layer3.push(flake)

    }

  }

  image(mountains[0],0,0);

  for(let flake of layer1){

     let xOff = flake.pos.x / width;

     let yOff = flake.pos.y / height;

     let wAngle = noise(xOff,yOff,zOff) * TWO_PI

     let wind = p5.Vector.fromAngle(wAngle);

     wind.mult(0.1);

​

     flake.applyForce(gravity);

     flake.applyForce(wind);

     flake.update();

     flake.draw();

  }

  image(mountains[1],0,0);

  for(let flake of layer2){

     let xOff = flake.pos.x / width;

     let yOff = flake.pos.y / height;

     let wAngle = noise(xOff,yOff,zOff) * TWO_PI

     let wind = p5.Vector.fromAngle(wAngle);

     wind.mult(0.1);

​

     flake.applyForce(gravity);

     flake.applyForce(wind);

     flake.update();

     flake.draw();

  }

  image(mountains[2],0,0);

  for(let flake of layer3){

     let xOff = flake.pos.x / width;

     let yOff = flake.pos.y / height;

     let wAngle = noise(xOff,yOff,zOff) * TWO_PI

     let wind = p5.Vector.fromAngle(wAngle);

     wind.mult(0.1);

​

     flake.applyForce(gravity);

     flake.applyForce(wind);

     flake.update();

     flake.draw();

  }

  for(let t of trees){

    image(t,0,0);

  }

  zOff += 0.05;

  // let fps = frameRate();

  // fps = floor(fps);

  // text(fps,20,20);

}