/* Failed Fractals: a code poem
   Jose Carlos Silvestre, 2008
   Navigational version 
*/


PImage img;
  int radius = 1500000;
  int c_rel = 1;
  int c_ima = 1;
  int incremento = 1;
  int x, y;
  int turn = 0;
  int click = 0;
  int isLoop = 1;
  int zoom = 6;
  int centrox = 0;
  int centroy = 0;
  boolean animation = false;
  boolean clicked = false;
  boolean navigation = false;

void setup() 
{
  size(800, 500);  


  loop();
}


void draw() 
{

  background(255,255,255);
  img = createImage(800, 500, ARGB);
 
    for(int i=0; i < img.pixels.length; i++) {
    
    x = zoom*((i % img.width) - int(img.width/2)) + centrox;
    y = zoom*((i/img.width) - int(img.height/2)) + centroy;
    int cor = 0;
    int r = 0;
    
    while(cor < 6 && r < radius) {

    int x2 = x*x - y*y + c_rel;
    int y2 = 2*x*y + c_ima;
    cor+=incremento;
    r = x2*x2 + y2*y2;    
    if (r > radius) { 
                      break;}
    else {x = x2; y = y2;}
    }  
    
    
if(cor==1)     img.pixels[i] = color(0, 0, 0);
else
img.pixels[i] = color(((float)cor)*100/6 + 100,((float)cor)*100/6 + 100,((float)cor)*100/6 + 100); 
   
  } 

 image(img, 0, 0);
 if(animation) { 

// this part varies the parameter c to create
// the animation. it watches for c itself to 
// overflow to switch turns.
switch(turn) {

  case 0:  if(c_rel > 0) c_rel*=2;
  else {c_rel=-1; turn=1;}
  break;
  
  case 1: if(c_rel <0) c_rel*=2;
  else  {c_rel=1; turn=2;}
  break;
  
  case 2: if(c_ima > 0) c_ima*=2;
  else {c_ima=-1; turn=3;} 
  break;
  
  case 3: if(c_ima <0) c_ima*=2;
  else  {c_ima=1; turn=4;}
  break;
  
  case 4: if(c_ima > 0 && c_rel > 0) {c_rel*=2; c_ima*=2;}
  else  {c_ima=-1; c_rel=1; turn=5;}
  break;
  
  case 5: if(c_ima < 0 && c_rel > 0) {c_rel*=2; c_ima*=2;}
  else  {c_ima=1; c_rel=1; turn=6;}
  break;
  
  case 6: if(c_ima > 0 && c_rel > 0) {c_rel*=3; c_ima*=2;}
  else  {c_ima=1; c_rel=1; turn=7;}
  break;
  
  case 7: if(c_ima > 0 && c_rel > 0) {c_rel*=2; c_ima*=3;}
  else  {c_ima=1; c_rel=1; turn=8;}
  break;
  
  case 8: if(c_ima > 0 && c_rel > 0) {c_rel*=15; c_ima*=2;}
  else  {c_ima=1; c_rel=1; turn=9;}
  break;
  
  case 9:
  turn = 0; noLoop();
  break;

}  
  delay(150); }

}


 
 void mousePressed() {
 navigation = true;
 animation = true;
 }


void keyPressed() { 
if (key == CODED) {
   if (keyCode == UP)
       centroy -= zoom*10;
   else if (keyCode == DOWN)
       centroy += zoom*10;
   else if (keyCode == RIGHT)
        centrox += zoom*10;
  else if (keyCode == LEFT)
         centrox -= zoom*10;
        
}

if (key == ' ') { animation = !animation;}
if (key == 'z') {if(zoom>1) zoom--;}
if (key == 'x') {if(zoom < 15) zoom++;}

}