Haze 07C for Processing

Haze07C.pde

//Haze07C
//date
int _y = year();
int _mo = month();
int _d = day();
int _h = hour();
int _mi = minute();
int _s = second();
PImage _img;
int _NUM = 4000;
PVector[] location = new PVector[_NUM];
PVector[] velocity = new PVector[_NUM];
PVector[] acceleration = new PVector[_NUM];
PVector[] force = new PVector[_NUM];
color[] colors = new color[_NUM];
float _radius = 1.0;
float _friction = 0.1;
PVector _minloc;
PVector _maxloc;
float _noiseScale = 0.02;//0.01
float _noiseStrength = 0.1;//0.1

void setup(){
  size(800, 800, P3D);
  smooth();
  _img = loadImage("source.jpg");
  _img.resize(width, height);
  _img.loadPixels();
  _minloc = new PVector(0, 0, height * -0.4);
  _maxloc = new PVector(width, height, height * 0.4);
  frameRate(60);
  for(int i = 0; i < _NUM; i++){
    location[i] = new PVector(random(width), random(height), random(height * -0.4, height * 0.4));
    velocity[i] = new PVector(0, 0, 0);
    acceleration[i] = new PVector(0, 0, 0);
    force[i] = new PVector(0, 0, 0);
    setColor(location[i], i);
  }
  background(255);
}

void draw(){
  noStroke();
  for(int i = 0; i < _NUM; i++){
    fill(colors[i], 6);//a = 3
    force[i].x = cos(noise(location[i].x * _noiseScale, location[i].y * _noiseScale, location[i].z * _noiseScale) * TWO_PI * 2.5);
    force[i].y = sin(noise(location[i].x * _noiseScale, location[i].y * _noiseScale, location[i].z * _noiseScale) * TWO_PI * 2.5);
    force[i].z = cos(noise(location[i].x * _noiseScale, location[i].y * _noiseScale, location[i].z * _noiseScale) * TWO_PI * 1.0);
    force[i].mult(_noiseStrength);
    acceleration[i].add(force[i]);
    velocity[i].add(acceleration[i]);
    velocity[i].mult(1.0 - _friction);
    location[i].add(velocity[i]);
    acceleration[i].set(0, 0, 0);
    pushMatrix();
    translate(location[i].x, location[i].y, location[i].z);
    ellipse(0, 0, _radius * 2, _radius * 2);
    popMatrix();
    if(location[i].x < _minloc.x){
      location[i].x = _maxloc.x;
    }
    if(location[i].y < _minloc.y){
      location[i].y = _maxloc.y;
    }
    if(location[i].z < _minloc.z){
      location[i].z = _maxloc.z;
    }
    if(location[i].x > _maxloc.x){
      location[i].x = _minloc.x;
    }
    if(location[i].y > _maxloc.y){
      location[i].y = _minloc.y;
    }
    if(location[i].z > _maxloc.z){
      location[i].z = _minloc.z;
    }
  }
}

void mousePressed(){
  if (mouseButton == RIGHT){
    noiseSeed(round(random(1000)));
    for(int i = 0; i < _NUM; i++){
      location[i].set(random(width), random(height), random(height * -0.4, height * 0.4));
      velocity[i].set(0, 0, 0);
      force[i].set(0, 0);
      acceleration[i].set(0, 0, 0);
    }
    //background(255);
  }else if(mouseButton == LEFT){
    saveFrame("output/haze07C" + _y + _mo + _d + _h + _mi + _s + "#######.jpg");
  }else{
    background(0);
  }
}
void setColor(PVector loc, int i){
  int x = (int)loc.x;
  int y = (int)loc.y;
  int pickup = x + (y * _img.height);
  color c = _img.pixels[pickup];
  colors[i] = c;
}