/**
 * Metaballs
 * by Xavier Gouchet (2008)
 **/


// Canvas Size
int width = 320;
int height = 240;

//Time
float time = 0.0;

//Metaballs
int mbcount;
Metaball[] mbs;

// Misc
float pi = 3.14159265;
float d2r = (2*pi)/360.0;
boolean debug = false;
boolean sav = false;


// setup
void setup(){
  // Basic Settings
  size(width,height);
  frameRate(30);
  background(0);

  // Init metaballs array
  // randomSeed(7);
  mbcount = round(random(3,8));
  mbs = new Metaball[mbcount];
  for (int i=0; i<mbcount; i++){
    mbs[i] = new Metaball(width,height);
  }
  
  // init drawing
  smooth();
  colorMode(RGB,255);
}


void draw(){
  // draw init
  time+= 0.5;
  background(0);

  // Metaballs Motion
  for (int m=0; m<mbcount; m++){
    mbs[m].Move(time);
  }

  // Metaballs rendering
  for (int i=0;i<width;i++){
    for (int j=0; j<height; j++){
      // init current inf
      float inf = 0.00001;
      float r = 0.0;
      float g = 0.0; 
      float b = 0.0;
      ///*
      for (int m=0; m<mbcount; m++){
        inf += mbs[m].Influence(i,j);
        color col = mbs[m].GetColor();
        float val = mbs[m].Influence(i,j);
        r += val * red(col);
        g += val * green(col);
        b += val * blue(col);
      }
      //*/
      if (inf>0.5){
        stroke (0.5*r,0.5*g,0.5*b);
        //point(i,j);
      }else{
        if (inf>0.4){
          float val = 1.5 * (1 - (20 * abs(inf-0.45)));
          stroke(val * r,val * g,val * b);
          point(i,j);
        }
      }
      
    }
  }

  // Debug display
  if (debug){
    for (int m=0; m<mbcount; m++){
      mbs[m].Draw();
    }
  }
}