Project 4: String Art

let yPerl = 0.0;

function setup() {
  createCanvas(400, 300);
  
  pinkSky = color(252, 224, 217);
  blueSky = color(190, 228, 235);
  mountainColor = color(46, 130, 129);
  treeColor = color(162, 179, 137);
  sunColor = color(255, 181, 181);
}

function draw() {
    background(0);

    //the sky
    let changeSky = map(mouseY, 0, height, 0, 1);
    var skyColor = lerpColor(pinkSky, blueSky, changeSky);
    fill(skyColor);
    rect(0, 0, width, height/1.5);

    //the sun
    noStroke();
    ellipseMode(CENTER);
    fill(sunColor);
    var stopMouseX = constrain(mouseX, 100, 300);
    var stopMouseY = constrain(mouseY, 0, 300);
    let sunX = map(stopMouseX, 0, width, 0, 400);
    let sunY = map(stopMouseY, 0, height, 0, 300);
    ellipse(sunX, sunY, 90, 90);
  
    //generative mountains
    fill(mountainColor);
    beginShape();
    let xPerl = 0;
    for (let x = 0; x<= width; x += 10) {
        let y = map(noise(xPerl), 0, 1, 200, 50);
        vertex(x, y);
        xPerl += 0.2;
    }
  
    yPerl += 0.2;
    vertex(width, height);
    vertex(0, height);
    endShape(CLOSE);
  
    //trees
    push();
    for (var i = 0; i <= 400; i += 1) {
        stroke(treeColor);
        strokeWeight(0.5);
        line(50, i + 50, i, height); //1st tree from the left
        line(100, i + 20, i + 50, height + 25); //2nd tree
        line(150, i + 70, i + 70, height + 50); //3rd tree
        line(225, i + 80, i + 200, height + 50); //4th tree
        line(width/2, i + 125, i + 150, height); //5th tree
        line(300, i + 60, i + 250, 300); //6th tree
        line(350, i + 100, i + 300, 350); //7th tree
        line(400, i + 100, i + 350, 400); //8th tree on far right
  }
    pop();
}