class Building
{
  float w, d, h, g;
  int stories;
  int age = 0;
  float xc[] = new float[1];
  float yc[] = new float[1];
  float zc[] = new float[1];
  float vx[] = new float[1];
  float vy[] = new float[1];
  float vz[] = new float[1];
  float ix = random(-.5,.5);
  float iz = random(-.5,.5);
  //boolean bd[] = new boolean[1];
  float cx = 0;
  float cy = 0;
  float cz = 0;
  float ox = 0;
  float oy = 0;
  float oz = 0;
  boolean receptive = true;
  int[] bd = new int[1];
  int agelimit = 1300;
  
  Building(float wide,float deep, float high, int st, float grav)
  {
    w = wide;
    h = high;
    d = deep;
    stories = st;
    g = grav;
    bd[0] = 0;
    println("stories="+stories);
    for(int i =0; i < stories; i++)
    {
     for(int j =0; j < 4; j++)
     {
        bd = append(bd, 0);
       if(j == 0)
       {
         xc = append(xc,ox);
         yc = append(yc,oy);
         zc = append(zc,oz);
         vx = append(vx,random(-.1,.1)+ix);
         vy = append(vy,0);
         vz = append(vz,random(-.1,.1)+iz);
             
       }
       if(j == 1)
       {
         xc = append(xc,ox);
         yc = append(yc,oy);
         zc = append(zc,oz-d);
       }
       if(j == 2)
       {
         xc = append(xc,ox+w);
         yc = append(yc,oy);
         zc = append(zc,oz-d);
       }
       if(j == 3)
       {
         xc = append(xc,ox+w);
         yc = append(yc,oy);
         zc = append(zc,oz);
       }
       oy-=h;
      }  
         // println(xc);
    }
  }
  void move()
  {
    cx = 0;
    cy = 0;
    cz = 0;
    
  for(int i = 0; i < stories; i++)
  {
   
    xc[i]+=vx[i];
    yc[i]-=vy[i];
    zc[i]+=vz[i];
    vy[i]-=g;
    
    cx+= xc[i];
    cy+= yc[i];
    cz+= zc[i];
    if(yc[i] > 0)
    {
      yc[i] = 0;
      vy[i]*=-.5;
      vx[i]*=random(-1,1);
      vz[i]*=random(-1,1);
      bd[i]++;
    }
    if(abs(vx[i])<.1 && abs(vy[i])<.1 && abs(vz[i])<.1 && bd[i] == 10)
    {
      vx[i] = 0;
      vy[i] = 0;
      vz[i] = 0;
      receptive = false;
    }
  
      
if(pressed && receptive)
{
 vy[i]+=random(.031);
} 
if(receptive && mpressed)
{
   vy[i]+=random(.000);
}
}
  cx/=stories;
  cy/= stories;
  cz/= stories;
  }
void display()
  {
   
    age++;
    if(age < agelimit)
    {
    println(stories);
    //println("hello");
    //print(xc);
    //box(5,5,5);
    fill(150,30,30,255);
    stroke(190,20,0);
    //beginShape(TRIANGLE_STRIP);
    //why the hell this for looop needs to go to stories - 5 is way beyond me.
    for(int i = 0; i < stories-5; i++)
    {
      beginShape(QUAD);
      vertex(xc[i],yc[i],zc[i]);
      vertex(xc[i+4],yc[i+4],zc[i+4]);
      vertex(xc[i+5],yc[i+5],zc[i+5]);
      vertex(xc[i+1],yc[i+1],zc[i+1]);
      endShape();
   //println("hithere");
    }
    //endShape();
    noFill();
    noStroke();
    if(age > agelimit-xc.length)
    {
      xc = shorten(xc);
      yc = shorten(yc);
      zc = shorten(zc);
    }
    }
  }
void shadow()
{
  pushMatrix();
  scale(1,.02,1);
  translate(0,8.13,0);
  age++;
    if(age < agelimit)
    {
    println(stories);
    //println("hello");
    //print(xc);
    //box(5,5,5);
    fill(20,0,0,255);
    noStroke();
    //stroke(190,20,20);
    beginShape(QUAD_STRIP);
    for(int i = 0; i < stories; i++)
    {
      vertex(xc[i],0,zc[i]);
   //println("hithere");
    }
    endShape();
    noFill();
    
    }
  popMatrix();
}
 
  
}