sample

int n = 500;                                 //線的數量

float delta;

float factor;

​

​

void setup(){

size(800,650);

delta = 2*PI/n;                             //旋轉角度

frameRate(5);                              //幀數

}

​

void draw(){

   //factor = 32*mouseX/width;

   factor = 7;                                   //可以調整數字

   background(50);

   translate(width/2, height/2);

   stroke(30,30,290);                           //橢圓形顏色

   strokeWeight(6);                             //線的粗細

   noFill();

   ellipse(0,0,800,400);                       //外圍橢圓形

   stroke(100,280,0);                          //線的顏色

   strokeWeight(5);                            //點的粗細

   for(int i = 0; i < n; i ++){

       point(400*cos(i*delta), 300*sin(i*delta));

       strokeWeight(1);                            //線的粗細

       line(400*cos(i*delta), 300*sin(i*delta), 400*cos(factor*i*delta), 300*sin(factor*i*delta));     //可以調整數字

   }

}