//This code is of a magical little squirrel that I have
//named Lyf (said "leaf") and Lyf's amazing magical abilities
//were coded by: Sara Mattice, Friday October 23, 2009
//With Mrs. Reiser's help too :D

//all of my variables
//a lot of these deal with my magical rings, the last four do
int h = 0, dimension;
float s = 1;
PImage squirrel;
float y=50.0;
float speed=10.0;
float radius=5.0;
int direction=1;

//this creates the Ring class, what draws the magical circles
//when the mouse is pressed, this is used to draw the rings
class Ring {
  float x, y;
  float diameter;
  boolean on=false;
  void start(float xpos, float ypos){
    x=xpos;
    y=ypos;
    on=true;
    diameter=.1;
  }
  //makes the rings expand and vanish when they have radius=15;
  void grow(){
    if (on==true) {
      diameter+=.5;
      if(diameter>15){
        on=false;
      }
    }
  }
  //this is what shows in the display when the 
  //magical loops are activated :)
  void display(){
    if (on==true){
      //these are my magical circles!
      fill(174,28,219,110);
      stroke(179,20,199,90);
      ellipse(x,y,(diameter)/3,(diameter)/3);
      ellipse(x+20,y+20,(diameter-2)/4,(diameter-2)/4);
      ellipse(x+30,y+7,(diameter-6)/2,(diameter-6)/2);
      ellipse(x+6,y+30,(diameter-8)/2.5,(diameter-6)/2.5);
    }
  }
}

//how many rings I have, I think
//I'm not entirely sure what it does, but its important.
Ring[] rings;
int numRings=90;
int currentRing=0;

//this is my setup function, declaring things like noCursor
//colorMode, size, the squirrel background, etc
//It sets the dimensions for the main pixel array too.
void setup() {
  noCursor();
  size(488,400);
  colorMode(HSB,360,100,100);
  noStroke();
  smooth();
  squirrel = loadImage("squirrel5.jpg"); //load squirrel-y background
  dimension = squirrel.height * squirrel.width;
  image(squirrel,0,0);
  ellipseMode(RADIUS);
  rings = new Ring[numRings];
  for (int i=0; i<numRings; i++) {
    rings[i] = new Ring();
  }
  frameRate(80);
}

//this is in addition to my keyPressed, containing the useful
//information that belongs up here and not under keyPressed
//it allows for the rings to display and grow, I think...
void draw() {
  background(squirrel);
  loadPixels();
    noStroke();
    fill(0,12);
  rect(0,0,width,height);
  for (int i=0; i <numRings; i++){
    rings[i].grow();
    rings[i].display();
  }
}
//when the H key is pressed, it launches into the code and
//following descritpion below. 
void keyPressed() {
  if (key == 'h') {
    squirrel.loadPixels();
    for (int i=0; i < dimension; i++) {
      squirrel.pixels[i] = color((hue(squirrel.pixels[i])+30)%360, saturation(squirrel.pixels[i]), brightness(squirrel.pixels[i]));
   //the above code is what changes our pixel array. It increments
   //the hue 30 degrees, meaning it looks smoother when you
    //press the "h" key and change the hues. 
    //This little sign % makes sure hue never grows beyond 360,
    //because that would be very bad
    }
  }
  //this changes the color of the magical loops when
  //the "m" key is pressed and makes sure that it only
  //changes the color of the pixels if they have a
  //brightness greater than 55
  else if(key=='m') {
    squirrel.loadPixels();
    for(int j=50; j<373; j++){
      for (int i=280; i <478; i++){
        if(brightness(squirrel.pixels[(j*width)+i])>55)
        squirrel.pixels[(j*width)+i]=color((hue(squirrel.pixels[(j*width)+i])+30)%360, saturation(squirrel.pixels[(j*width)+i]), brightness(squirrel.pixels[(j*width)+i]));
      }
    }
  }
  //this updates the pixels after the m key is pressed,
  //I think...
  squirrel.updatePixels();
  image(squirrel, 0, 0);
}

//draws the magical circles when the mouse is moved and 
//makes sure the rings follow the mouse coordinates,
//while also stopping if it gets above numRings...
//I think...
void mouseMoved(){
  rings[currentRing].start(mouseX,mouseY);
  currentRing++;
  if (currentRing >= numRings){
    currentRing=0;
  }
}