/*
   Homework #3 - ICM
   
   Michael Chladil
   2006-09-26
   
   Description: 
   When the mouse is pressed, a blue water droplet is released and falls 
   to the ground.  Up to twenty droplets can be released.
  
   This program does not simulate evaporation.  When the twenty droplets
   are released, no more are available.
*/

class Droplet
{
  int x;
  int y;
  int dWidth;
  int dHeight;
  int speed;

  Droplet (int initX, int initY, int initdWidth, int initdHeight)
  {
    x          = initX;
    y          = initY;  
    dWidth     = initdWidth;
    dHeight    = initdHeight;
    speed      = 2;
  }
  void display ()
  {
    ellipse (x, y, dWidth, dHeight);
  }

  void move ()
  {
    if (y < (height - dHeight))
    {
      y += speed;
      speed++;  // Accelerate the water droplet as it approaches the ground
    }
    else // flatten out the droplet when it hits the ground
    {
      if (dHeight > 0)
        dHeight -= 3;
    }
    
    display ();
  }   
}

int       MAX_DROPLETS;
Droplet []Droplets;
int       dropletCount = 0;

void setup ()
{
  smooth ();
  framerate (30);
  size (600, 600);
  fill (#1E77A5);
  stroke (#1E77A5);

  MAX_DROPLETS = 20;
  
  Droplets = new Droplet [MAX_DROPLETS];
}

void draw ()
{
  int i = 0;
  background (0,0,0);
  for (i = 0; i < dropletCount; i++)
  {
    Droplets[i].move();
  }
}

void mousePressed()
{
  if (dropletCount < MAX_DROPLETS)
  {
    Droplets[dropletCount] = new Droplet (mouseX, mouseY, int (random (20)) + 20, int (random (20)) + 20);
    Droplets[dropletCount].display();
    dropletCount++;
  }
}