Tree t1,t2,t0;


void setup(){
 size(500,500);  
 t1 = new Tree(1,350);
 t2 = new Tree(.75,170);
 t0 = new Tree(.5,450);
 noStroke();
 
}

float speed = 2;

void mouseMoved(){
   speed =  map(mouseY,0,500,4,-4);
}
void draw(){

  BASEY +=  speed;
  if(BASEY > 0) BASEY = 0;
  if(BASEY < -3900) BASEY = -3900;
   background(255,255,225); //YELLOW
 
   t0.draw();
   t2.draw();
   t1.draw(); 
// fill(0); 

 //text(BASEY,50,100);
 }

float BASEY = -1500;


float TREEWIDTH  = 40;
float TREEHEIGHT = 5000;
class Tree{
  float centerX; float scale;
  ArrayList<Branch> branches = new ArrayList<Branch>();
  Tree(float pScale, float pCenter){
    
   
    
      scale = pScale;
     centerX =  pCenter;
     for(int i = 0; i< 50; i++) branches.add(new Branch(scale,random(TREEHEIGHT)));
  }
  void draw(){
    
    
    
    
    stroke(0);
    //fill(255);
    fill(225 -( 100   * scale));
      stroke(225 -( 100   * scale));
   // rect(centerX - scale * 40, 0, 80 * scale, 500);
  pushMatrix();
    translate(centerX, BASEY * scale);
    rect(-scale*TREEWIDTH,0,scale*2*TREEWIDTH,scale*TREEHEIGHT);
  
    for(Branch b:branches){
      pushMatrix();
      translate(0,b.loc*scale);  
      
      b.draw();
      popMatrix();
    }
popMatrix();
}
  
}




class Branch{
 
   float scale;
   float s;
   float loc;
  
   ArrayList<Limb> limbs = new ArrayList<Limb>();
   ArrayList<Puff> puffs = new ArrayList<Puff>();
   Branch(float pscale, float ploc){
      scale = pscale;
      loc = ploc;
      float angle = random(-.3,.3);
      boolean downish = true;
      if(random(1) < .5) {
        angle += PI;
        downish = false;
      }
      float ex = 0;
      float ey = 0;
      float w = scale * 15;
      float s = random(20,50) * scale;
      for(int i = 0; i < 5; i++){
        ex += s * cos(angle);
        ey += s * sin(angle);
        if(downish) angle -= .1;
        else angle += .1;
        w *= .9;
        limbs.add(new Limb(ex,ey,w));
      }
      for(int i = 0; i < 4; i++){
        float x = scale * random(-10,10);
        float y = scale * random(-10,10);
        float a = random(20*scale,60*scale);
        float b = random(20*scale,60*scale);
        puffs.add(new Puff(x,y,a,b));
      }
   } 
   
   void draw(){
     float lx =0, ly=0;
   for(Limb m : limbs){
     strokeWeight(m.w);
      line(lx,ly,m.x,m.y);
     lx = m.x; ly = m.y;
   }  
      for(Puff p : puffs){
        ellipse(lx+p.x,ly+p.y,p.a, p.b);
      }
   }
  
}
class Puff{
  float x,y,a,b;
  Puff(float px, float py, float pa, float pb){
     x = px; y= py;  a = pa; b = pb;
  }
}
class Limb{
  float x,y,w;
  Limb(float px, float py, float pw){
     x = px; y = py; w = pw; 
  }
}