// A program to simulate balloons with LEDs inside
// Brock Craft
// at tinker.it

int num= 60;
Led[] led;


void setup(){

  size(300,300);
  noStroke();
  smooth();
  colorMode(HSB);
  led=new Led[num];
  for (int i=0;i<num;i++){
    led[i]=new Led (int(random(width)),int(random(height)),int(random(255)));
  }

}

void draw(){
  background(53);
  for (int i=0;i<num;i++){
    led[i].render();
  }
  delay(25); // a delay to match what the balloons will do in real time
}

void mousePressed(){
  for (int i=0;i<num;i++){
    led[i].x=int(random(width));
    led[i].y=int(random(width));
  }
}

class Led{

  int i;
  int x;
  int y;
  int col;

  // mapping the colour intensity to a sinewave that's in a lookup table below
  int map[]={
    0,0,0,0,1,1,1,2,2,3,4,5,6,6,8,9,10,11,12,14,15,17,18,20,22,23,25,27,29,
    31,33,35,38,40,42,45,47,49,52,54,57,60,62,65,68,71,73,76,79,82,85,88,91,
    94,97,100,103,106,109,113,116,119,122,125,128,131,135,138,141,144,147,
    150,153,156,159,162,165,168,171,174,177,180,183,186,189,191,194,197,199,
    202,204,207,209,212,214,216,218,221,223,225,227,229,231,232,234,236,238,
    239,241,242,243,245,246,247,248,249,250,251,252,252,253,253,254,254,255,
    255,255,255,255,255,255,255,254,254,253,253,252,252,251,250,249,248,247,
    246,245,243,242,241,239,238,236,234,232,231,229,227,225,223,221,218,216,
    214,212,209,207,204,202,199,197,194,191,189,186,183,180,177,174,171,168,
    165,162,159,156,153,150,147,144,141,138,135,131,128,125,122,119,116,113,
    109,106,103,100,97,94,91,88,85,82,79,76,73,71,68,65,62,60,57,54,52,49,
    47,45,42,40,38,35,33,31,29,27,25,23,22,20,18,17,15,14,12,11,10,9,8,6,6,
    5,4,3,2,2,1,1,1,0,0,0,0
  };

  Led (int myx, int myy, int mycol){

    x=myx;
    y=myy;
    col=mycol;
    i=int(random(255));
  }

  void render(){
    i++;
    if (i>=map.length){
      i=0;
    }
    fill(180,map[i],175);
    noStroke();
    ellipse(x,y,30,30);
  }

}