20250103

/***********************************

 * dailycoding - 20250103 / graphic

 * by E.C.H (Eiichi Ishii)

 ***********************************/

​

let w;

let num = 200;

let cp = ["#711641", "#C30943", "#EF7F32", "#78914F", "#3B0E18"];

​

function setup() {

  w = min(windowWidth, windowHeight);

  createCanvas(w, w);

  angleMode(DEGREES);

  noLoop();

}

​

function draw() {

  background(255);

​

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

    push();

    translate(random(-w / 4, w + w / 4), random(-w / 4, w + w / 4));

    rotate(random(-45, 45));

​

    let mr = random([w / 4, w / 2]);

    let rg = mr / 40;

    let c = color(random([255, random(cp)]));

    c.setAlpha(random(80, 255));

    stroke(c);

    noFill();

​

    for (let r = mr; r >= 0; r -= rg) {

      let lr = map(r, mr, 0, 0, rg / 2);

      strokeWeight(lr);

      ellipse(0, 0, mr, r);

    }

​

    let pc = random(cp);

    let mxpr = random(1, mr / 6);

    for (let j = 0; j < int(num / 5); j++) {

      let a = random(360);

      let sq = sqrt(random(1));

      let pr = random(1, mxpr);

      if (int(random(4)) == 0) {

        stroke(pc);

        strokeWeight(random(1, mxpr / 20));

        noFill();

      } else {

        fill(pc);

        noStroke();

      }

      ellipse(((sq * mr) / 2) * cos(a), ((sq * mr) / 2) * sin(a), pr, pr);

    }

    pop();

  }

  let rw = w/10;

  rakkan(rw/2.5, w-rw/1.25, rw, 0);

}

​

function rakkan(posx, posy, r, csw) {

  push();

  randomSeed(3817);

  translate(posx, posy);

  rectMode(CENTER);

  let nr = r / 2.5;

  let lr = r / 20;

​

  if (csw == 0) {

    fill("#e2041b");

    noStroke();

  } else if (csw == 1) {

    noFill();

    stroke("#e2041b");

    strokeWeight(lr / 4);

  }

​

  rect(0, 0, r / 1.4, r * 1.5, r / 5);

​

  if (csw == 0) {

    stroke(255);

  } else if (csw == 1) {

    fill(255);

    stroke("#e2041b");

  }

  strokeWeight(lr / 1.5);

  noFill();

​

  for (let i = 0; i < 10; i++) {

    let z = random(lr / 20, lr / 2);

    push();

    push();

    translate(0, -nr);

    beginShape();

    vertex(nr / 2 + random(-z, z), -nr / 2 + random(-z, z));

    vertex(random(-z, z), -nr / 2 + random(-z, z));

    vertex(-nr / 2 + random(-z, z), random(-z, z));

    vertex(random(-z, z), nr / 2 + random(-z, z));

    vertex(nr / 2 + random(-z, z), nr / 2 + random(-z, z));

    endShape();

​

    beginShape();

    vertex(-nr / 2 + random(-z, z), random(-z, z));

    vertex(nr / 2 + random(-z, z), random(-z, z));

    endShape();

    pop();

​

    push();

    translate(0, 0);

    beginShape();

    vertex(nr / 2 + random(-z, z), -nr / 2 + random(-z, z));

    vertex(random(-z, z), -nr / 2 + random(-z, z));

    vertex(-nr / 2 + random(-z, z), random(-z, z));

    vertex(random(-z, z), nr / 2 + random(-z, z));

    vertex(nr / 2 + random(-z, z), nr / 2 + random(-z, z));

    endShape();

​

    strokeWeight(lr / 3);

    beginShape();

    vertex(nr / 2 + random(-z, z), -nr / 2 + random(-z, z));

    vertex(-nr / 2 + random(-z, z), nr / 2 + random(-z, z));

    endShape();

    pop();

​

    push();

    translate(0, nr);

    beginShape();

    vertex(-nr / 2 + random(-z, z), -nr / 2 + random(-z, z));

    vertex(-nr / 2 + random(-z, z), nr / 2 + random(-z, z));

    endShape();

​

    beginShape();

    vertex(nr / 2 + random(-z, z), -nr / 2 + random(-z, z));

    vertex(nr / 2 + random(-z, z), nr / 2 + random(-z, z));

    endShape();

​

    beginShape();

    vertex(-nr / 2 + random(-z, z), random(-z, z));

    vertex(nr / 2 + random(-z, z), random(-z, z));

    endShape();

​

    strokeWeight(lr / 3);

​

    beginShape();

    vertex(nr / 2 + random(-z, z), -nr / 2 + random(-z, z));

    vertex(-nr / 2 + random(-z, z), nr / 2 + random(-z, z));

    endShape();

    pop();

    pop();

  }

  pop();

}

​

function keyPressed() {

  redraw();

}