// nick@coolbubble.com
// thanks to stick figure ninja for source image & idea
// for b3ta

BImage imageA;

float [] coords = {109.0f,164.0f,193.0f,159.0f};
int toggleSpong = 0;
int toggleDelay = 0; // set to 1 for slow eyes
float mx=100,my=100;

void setup()
{
  size(275,298);
  imageA = loadImage("noeyecat.jpg");
  ellipseMode(CENTER_DIAMETER);
}

void keyPressed()
{
  if (key=='s')
  {
    if (toggleDelay==0) toggleDelay=1;
    else toggleDelay=0;
  }
}

void loop()
{
  background(imageA);

  float dx,dy,distance,nx,ny;

  if (toggleDelay==0)
  {
    mx=mouseX;
    my=mouseY;
  }
  else
  {
    mx=(mx*0.95f)+((float)mouseX*0.05f);
    my=(my*0.95f)+((float)mouseY*0.05f);
  }

  for (int i=0;i<2;i++)
  {
    // get vector from eye to mouse.
    dx = mx-coords[0+i*2];
    dy = my-coords[1+i*2];
    distance=constrain(sqrt(sq(dx)+sq(dy)),0.01f,width);
    nx=dx/distance;  // normalise vector.
    ny=dy/distance;
    nx*=8.0f;
    ny*=8.0f;
    drawEye(toggleSpong, coords[0+i*2], coords[1+i*2],nx,ny);
  }

  // handle nose click.
  if (mouseX>137 && mouseY>204 && mouseX<174 && mouseY<222 )
  {
    if (mousePressed)
    {
      if (toggleSpong==0) toggleSpong=1;
      else toggleSpong=0;
      delay(100);
    }
  }
}

void drawEye(int mode, float x, float y, float ox, float oy)
{

  if (mode==0)
  {
    noStroke();
    smooth();
    fill(0,0,0,200);
    ellipse(x+ox,y+oy,8,15);
    fill(255,255,255,200);
    //smooth();
    ellipse(x-6,y-6,4,5);
    //noSmooth();
  }

  if (mode==1)
  {
    noStroke();
    smooth();
    fill(0,0,0);
    ellipse(x,y,42,42);
    fill(255,255,255);
    ellipse(x,y,40,40);
    noStroke();
    fill(0,0,0,200);
    ellipse(x+ox,y+oy,10,15);
    fill(255,255,255,200);
    ellipse(x-7,y-7,6,6);
  }
}