つぶやきProcessing その２ (2026/4/20)

https://scrapbox.io/files/69e638453caed06dfe05ca41.mp4

code:processing

//#つぶやきProcessing

float x=0.1, y=0, p, q, a=5, k=.1, t=80, i, n;

void setup() {

size(800, 800);

background(0);

colorMode(3);

}

void draw() {

fill(0, 2);

square(-1, -1, 802);

stroke((n++)%256, 255, 255);

for (i=0; i<60000; i++) {

p=k*x+y+a*x/(1+x*x);

q=-x;

point(p*t+400, q*t+400);

x=p;

y=q;

}

k+=1e-4;

t/=1.007;

}