220124a - OpenProcessing

mySketch
xxxxxxxxxx
 
function setup() {
  createCanvas(w=720, w);
  background(255);
  fill(0);
  strokeWeight(0);
​
  let num = 1500;
  for(let i=0;i<num;i++){
    push();
    translate(w*0.025+w*0.95*random(), w*0.025+w*0.4625*random())
    dango(15, "#ff8888");
    pop();
  }
  
  for(let i=0;i<num;i++){
    push();
    translate(w*0.025+w*0.95*myRand(), w-w*0.025-w*0.4625*myRand())
    dango(15, "#8888ff");
    pop();
  }
  
  fill(255);
  strokeWeight(10);
  stroke(0);
  textSize(w*0.075);
  textAlign(CENTER, CENTER);
  text("p5.js random()", w/2, w*0.25);
  text("myRand()", w/2, w-w*0.25);
}
​
prand = undefined
function myRnadSeed(seed){
  prand = seed
}
​
function myRand(){
  if(prand == undefined){
    prand = 1234567890 + second()
  }
  
  let N = Number.MAX_SAFE_INTEGER + 10
  
  for(let i=0;i<5;i++){
  prand += 1/N
  prand *= 123456789
  prand += 987654321
  prand += 0.1*N*prand*(sin(prand * 0.123456789) + cos(prand * 0.987654321))
​
  prand = prand % N
  prand /= N
  }
  
  prand = abs(prand)
​
  return prand
}
​
​
function dango(size, fcolor){
  push();
  strokeWeight(size/18);
  translate(0, 0)
  fill(fcolor);
  ellipse(0, 0, size);
  face(size);
  pop();
}
​
function face(size){
  push();
  fill("#000000");
  strokeWeight(size/18);
  ellipse(size/8*2, -size/10, size/14);
  ellipse(-size/8, -size/10, size/14);
  fill(0,0);
  arc(size/8, size/20, size/10*1.25, size/10, -PI/2*1.25, PI/2*1.25);
  arc(size/8*0.6, size/16*3.5, size/4, size/10, 0, PI);
  pop();
}