int vine_total_ori = 1;
int vine_total = vine_total_ori;
int vine_max = 1000000;
int center_x, center_y;
vine [] vine_array = new vine [vine_max]; 
int clone_num;
  
void setup(){
  size(500,500);
  center_x = width/2;
  center_y = height/2;
  background(0);
  vine_gen_ori();
}
void loop(){
  for(int i=0;i<vine_total;i++){
    if(vine_array[i].dist>1 && !mousePressed){
      vine_array[i].grow();
    }
  }
}
void mousePressed(){
  background(0);
  vine_total = vine_total_ori;
}
void mouseReleased(){
  vine_gen_ori();
}

void vine_gen_ori(){
  clone_num = int(random(6))+3;
  for(int i=0;i<vine_total;i++){
    vine_array[i] = new vine();
    vine_array[i].name = "origin";
    vine_array[i].ox = 0;
    vine_array[i].oy = 0;
    //vine_array[i].oldx = vine_array[i].ox;
    //vine_array[i].oldy = vine_array[i].oy;
    vine_array[i].depth = 0.5 - random(0.4);
    vine_array[i].dist = 4.8;
    vine_array[i].dist_offset = 0.045;
    vine_array[i].dir = int(random(2))*2 - 1;
    vine_array[i].ceta = 0;
    vine_array[i].ceta_ori = PI/180*(-90) + random(1) - .5;
    vine_array[i].a = 0;
    vine_array[i].r = 100;
    vine_array[i].g = random(100);
    vine_array[i].b = 100;
  }
}
void vine_gen_curl(float x, float y, float dist, float ceta, float r, float g, float b){
    vine_array[vine_total] = new vine();    
    int i = vine_total;
    vine_array[i].name = "curl";
    vine_array[i].ox = x;
    vine_array[i].oy = y;
    //vine_array[i].oldx = vine_array[i].ox;
    //vine_array[i].oldy = vine_array[i].oy;
    vine_array[i].depth = 0.5;
    vine_array[i].dist = dist;
    vine_array[i].dist_offset = 0.05 + random(0.04);
    vine_array[i].dir = int(random(2))*2 - 1;
    vine_array[i].ceta = 0;
    vine_array[i].ceta_ori = ceta;
    vine_array[i].a = 0;
    vine_array[i].r = r;
    vine_array[i].g = g;
    vine_array[i].b = b;
    vine_total ++;
}
void vine_gen_swirl(float x, float y, float dist, float ceta, float r, float 

g, float b){
    vine_array[vine_total] = new vine();    
    int i = vine_total;
    vine_array[i].name = "swirl";
    vine_array[i].ox = x;
    vine_array[i].oy = y;
    //vine_array[i].oldx = vine_array[i].ox;
    //vine_array[i].oldy = vine_array[i].oy;
    //vine_array[i].depth = 0.5;
    vine_array[i].dist = dist ;
    vine_array[i].dist_offset = 0.05 + random(0.04);
    vine_array[i].dir = int(random(2))*2 - 1;
    vine_array[i].ceta = 0;
    vine_array[i].ceta_ori = ceta;
    vine_array[i].a = 0;
    vine_array[i].r = r;
    vine_array[i].g = g;
    vine_array[i].b = b;
    vine_total ++;
}

int leaf_w = 4;
int leaf_h = 8;
void vine_gen_leaf(float x, float y, float r, float g, float b){
  ellipseMode(CENTER_DIAMETER);
  fill(r,g,b,160);
  noStroke();
  for(int i=0;i<clone_num;i++){
     push();
     translate(center_x,center_y);
     rotateZ(i*PI*2/clone_num);
     translate(x,y);
     rotateZ(random(PI*2));
     quad(0,0, leaf_w,leaf_h, 0,leaf_h*2, -leaf_w,leaf_h);
     pop();
  }
}

class vine{
  float ox,oy,oldx,oldy,cx,cy;
  float depth,dist,dist_offset,dir;
  float r,g,b;
  float ceta,ceta_ori,a;
  String name;  

  vine(){
    cx = 0;
    cy = 0;
  }  
  void grow(){
    if(name=="curl" || name=="origin"){
      ceta = ceta_ori + depth * sin(a);
    }else if(name=="swirl"){
      ceta = ceta_ori + a ;
    }    
    cx += dist * cos(ceta);
    cy += dist * sin(ceta);
    if(name=="curl" || name=="origin"){
      a += PI/180 * 10 * dir;
    }else if(name=="swirl"){
      a += PI/180 * 10 * dir;
    }
    dist -= dist_offset;
    
    b = dist*50;
    rectMode(CENTER_DIAMETER);
    fill(r,g,b,255);
    noStroke();
    for(int i=0;i<clone_num;i++){
      push();
      translate(center_x,center_y);
      rotateZ(i*PI*2/clone_num);
      translate(ox+cx,oy+cy);
      rotateZ(ceta+PI/180*90);
      rect(0,0,dist*dist/2,dist);
      pop();
    }

    oldx = cx;
    oldy = cy;
    if((int)random(20)==0){
      if(name=="origin"){
        if(dist<5.5){
          vine_gen_curl(cx+ox,cy+oy,dist,ceta,r,g,b);
          //vine_gen_leaf(cx+ox,cy+oy,r,g,b);
        }
      }else{
        vine_gen_curl(cx+ox,cy+oy,dist,ceta,r,g,b);
        //vine_gen_leaf(cx+ox,cy+oy,r,g,b);
       }
    }
    if((int)random(10)==0 && (name=="curl")){
      vine_gen_swirl(cx+ox,cy+oy,dist,ceta,r,g,b);
      //vine_gen_leaf(cx+ox,cy+oy,r,g,b);
    }
  }
}