ベジエ曲線でタイリング

/**
* bezier tiling
*
* @author aa_debdeb
* @date 2016/10/08
*/

int cellNum = 160;
float cellSize = 40;

void setup(){
  size(640, 640);
  mousePressed();
}

void mousePressed(){
  background(255);
  stroke(random(255), random(255), random(255));
  strokeWeight(1);
  color c1 = color(random(255), random(255), random(255));
  color c2 = color(random(255), random(255), random(255));  
    PVector cpx1 = new PVector(random(0, cellSize / 2), random(-cellSize / 2, cellSize / 2));
    PVector cpx2 = new PVector(random(cellSize / 2, cellSize), random(-cellSize / 2, cellSize / 2));
    PVector cpy1 = new PVector(random(-cellSize / 2, cellSize / 2), random(0, cellSize / 2));
    PVector cpy2 = new PVector(random(-cellSize / 2, cellSize / 2), random(cellSize / 2, cellSize));      
  for(int x = -1; x < cellNum + 1; x++){
    for(int y = -1; y < cellNum + 1; y++){
      float w = x * cellSize;
      float h = y * cellSize;
      if((x + y) % 2 == 0){
        fill(c1);
      } else {
        fill(c2);
      }
      pushMatrix();
      translate(w, h);
      beginShape();
      vertex(0, 0);
      bezierVertex(cpx1.x, cpx1.y, cpx2.x, cpx2.y, cellSize, 0);
      bezierVertex(cellSize + cpy1.x, cpy1.y, cellSize + cpy2.x, cpy2.y, cellSize, cellSize);
      bezierVertex(cpx2.x, cellSize + cpx2.y, cpx1.x, cellSize + cpx1.y, 0, cellSize);
      bezierVertex(cpy2.x, cpy2.y, cpy1.x, cpy1.y, 0, 0);
      endShape();
      popMatrix();
    }
  }
}

void draw(){
}