Starry Day 2

let w = 834;

flag = 0;

​

function setup() {

  createCanvas(w*4/3, w);

  frameRate(1);

  //back draw

  background(230, 228, 225);

  strokeWeight(0.5);

  for(let i=0;i<width;i++){

    for(let j=0;j<height;j++){

      stroke(230 + 30*(0.5 - noise(0.04*i, 0.06*j), 250));

      point(i, j);

    }

  }

}

​

function draw(){

  //main draw

  if (random(1) > .7){

    blendMode(BURN);

​

  } else {

    blendMode(SCREEN);

  }

  noFill();

  strokeWeight(0.1);

  translate(1112/2, w/2);

  let colpat = [ [20, 50, 80],

                 [80, 20, 50]

  ];

  let nn = 5;

  let n = nn * 1.75;

  for(let k=1;k<nn; k++){

    push();

    rotate(PI/8*k);

    for(let i=0;i<360; i+=45){

      push();

      rotate(radians(i));

      let ctrlP = 4;

      for(let j=0;j<40;j+=0.1){

        let ctrlX = j * ctrlP;

        let ctrlY = j * ctrlP;

        let mapi2 = map(j, 25, 50, 50, 0);

        stroke(colpat[k%2][0]+20*noise(0.2*j, i*0.6, k*0.3),

              　colpat[k%2][1]+50*noise(0.075*j, i*0.5, k*0.6),

              　colpat[k%2][2]+60*noise(0.095*j, i*0.9, k*0.8),

              　mapi2*noise(0.075*j, i, k));

        line(0, w/n*k, ctrlX, 0);

        line(0, ctrlY, w/n*k, 0);

      }

      pop();

    }

    pop();

​

  }

}

​

// save jpg

let lapse = 0;    // mouse timer

function mousePressed(){

  if (millis() - lapse > 400){

    save("img_" + month() + '-' + day() + '_' + hour() + '-' + minute() + '-' + second() + ".jpg");

    lapse = millis();

  } 

}