week 8. rotate

float radius;
int segment = 6;
float centerX;
float centerY;
int recursionLevel = 3;

void setup(){
 size(600,600);
 background(0);
 stroke(255);
 centerX = height/2;
 centerY = width/2;
}

void draw(){
  background(0);
 // radius = dist(centerX, centerY, mouseX, mouseY);
  radius  = 50;
 
  pushMatrix();
  translate(centerX, centerY);
  rotate(frameCount / 50.0);
  spiral(0,0,radius,segment, recursionLevel);
  popMatrix();

}
void spiral(float x_c,float y_c, float r, int segm, int level){
  level -= 1;
  noFill();
  ellipse(x_c,y_c,2*r,2*r);
    for(int i =0; i < segm; i++)  
    {
      float x = x_c+cos(i*2*PI/segm)*r;
      float y = y_c+sin(i*2*PI/segm)*r;
      point(x,y);
      ellipse(x,y,2*r,2*r);
 
      if(level>0){
      spiral(x,y,r,segm, level);
      }
    }
}



see example: https://processing.org/examples/regularpolygon.html

EX: 創造一個陣列，讓每個物件旋轉。