ベジエ曲線で水玉を描く

/**
* Drops
* 
* @author aa_debdeb
* @date 2015/11/10
*/

Drop[][] drops;

void setup(){
   size(500, 500);
   smooth();
   drops = new Drop[10][10];
   for(int x = 0; x < 10; x++){
     for(int y = 0; y < 10; y++){
       drops[x][y] = new Drop((x + 1) * 45.5, (y + 1) * 45.5);
     }
   }  
   background(255, 250, 250);
}

void draw(){
  noStroke();
  fill(255, 250, 250, 50);
  rect(-1, -1, width, height);
  for(int x = 0; x < 10; x++){
       for(int y = 0; y < 10; y++){
         drops[x][y].update();
         drops[x][y].display();
       }
   }  
}

class Drop{
  
  PVector center;
  PVector tip;
  PVector tipNoise;
  PVector control1;
  PVector control1Noise;
  PVector control2;
  PVector control2Noise;
  
  Drop(float x, float y){
    center = new PVector(x, y);
    tipNoise = new PVector(random(100), random(100));
    control1Noise = new PVector(random(100), random(100));
    control2Noise = new PVector(random(100), random(100));
    update();
  }
  
  void update(){
    tip = new PVector(map(noise(mouseX * 0.003 + tipNoise.x), 0, 1, -20, 20), 
                      map(noise(mouseY * 0.003 + tipNoise.y), 0, 1, -20, 20)); 
    control1 = new PVector(map(noise(mouseX * 0.003 + control1Noise.x), 0, 1, -75, 75), 
                           map(noise(mouseY * 0.003 + control1Noise.y), 0, 1, -75, 75));
    control2 = new PVector(map(noise(mouseX * 0.003 + control2Noise.x), 0, 1, -75, 75), 
                           map(noise(mouseY * 0.003 + control2Noise.y), 0, 1, -75, 75));
  }
  
  void display(){
    pushMatrix();
    translate(center.x, center.y);
    stroke(238, 130,238);
    strokeWeight(1);
    fill(53,111, 214);
    bezier(tip.x, tip.y,
           control1.x, control1.y,
           control2.x, control2.y,
           tip.x, tip.y);
    popMatrix();
  }
  
}