Motiondetection_n_splash.pde

import processing.video.*;

Capture video;

int fWidth=640;
int fHeight=360;

boolean[][] prevFrame = new boolean[fWidth][fHeight];

void setup()
{
  frameRate(10);
  size(fWidth, fHeight);
  splatpoop = new ArrayList();
  testLayer = createGraphics(width, height);
  String[] cameras = Capture.list();
  if (cameras.length == 0) {
    println("There are no cameras available for capture.");
    exit();
  } 
  else {
    println("Available cameras:");
    for (int i = 0; i < cameras.length; i++) {
      println(cameras[i]);
    }
    video = new Capture(this, cameras[3]);
    video.start();
  }

  for (int x=0;x<width;x++)
  {
    for (int y=0;y<height;y++)
    {
      prevFrame[x][y]=false;
    }
  }
}

boolean currentPixel;
void draw()
{
  
  if (video.available() == true) {
    video.read();
  }
  set(0, 0, video);
  filter(THRESHOLD);

  for (int x=0;x<width;x++)
  {
    for (int y=0;y<height;y++)
    {
      currentPixel=(get(x, y)==color(#000000)) ? true : false;
      if (prevFrame[x][y]!=currentPixel)
      {
        set(x, y, color(255, 0, 0));
      }
      prevFrame[x][y]=currentPixel;
    }
  }

  for (int x=0;x<=width+80;x+=40)
  {
    for (int y=0;y<height;y+=40)
    {
      if ((get(x+20, y+20)==color(255, 0, 0)) ? true : false)
      {
        color splc =  video.get(x+20, y+20);
        for (float i=2; i<20; i+=.20) {
          Splash sp = new Splash(x+20, y+20, i, splc);
          splatpoop.add(sp);
        }
      }
    }
  }
  
  fill(255);
  rect(0,0,width,height);
  updateSplash();
}


ArrayList splatpoop;
PGraphics testLayer;
class Splash {
  int x, y;
  float rad, ellipseangle, i;
  color c;
  Splash(int _x, int _y, float _i, color splc) {
    x = _x;
    y = _y;
    i = _i;
    rad = random(2, 10);
    ellipseangle = random(0, TWO_PI);
    c = splc;
  }

  void display() {

    testLayer.fill(c);
    testLayer.noStroke();
    float spotX = x + cos(ellipseangle)*2*i;
    float spotY = y + sin(ellipseangle)*3*i;
    testLayer.ellipse(spotX, spotY, rad-i, rad-i+random(1, 2));
  }
  void update() {
    y = y+1;
  }
}

void updateSplash() {
 testLayer.beginDraw();
 if (splatpoop.size() > 600)
 {
   for (int i=0;i<splatpoop.size()-400;i++)
   {
     splatpoop.remove(i);
   }
 }
  for (int i=0; i<splatpoop.size(); i++) {
    Splash s = (Splash) splatpoop.get(i);
    s.display();
    if(random(80)<40)
    s.update();
    if (s.y>height)
      splatpoop.remove(i);
  }
  testLayer.endDraw();
  image(testLayer,0,0); 
}