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import deadpixel.keystone.*;
Keystone keyStone;
CornerPinSurface surface;

PGraphics offscreen;


int numCircle = 30;
float movX[], movY[];
float directionX[], directionY[];
float speedX[], speedY[];
color colorCircle[];
float sizeCircle[];


void setup() {

  size(1280, 800, P3D);

  keyStone = new Keystone(this);
  surface = keyStone.createCornerPinSurface(400, 400, 20);
  offscreen = createGraphics(400, 400, P3D);


  movX = new float[numCircle];
  movY = new float[numCircle];
  directionX = new float[numCircle];
  directionY = new float[numCircle];
  speedX = new float[numCircle];
  speedY = new float[numCircle];
  colorCircle = new color[numCircle];
  sizeCircle = new float[numCircle];

  for (int i=0; i<numCircle; i++) {
    directionX[i] = 1;
    directionY[i] = 1;
    speedX[i] = random(3, 10);
    speedY[i] = random(3, 10);
    colorCircle[i] = color( random(255), random(255), random(255) );
    sizeCircle[i] = random(20, 40);
  }
}


void draw() {

  for (int i=0; i<numCircle; i++) {
    movX[i] = movX[i] + directionX[i] * speedX[i];
    movY[i] = movY[i] + directionY[i] * speedY[i];

    if (movX[i]>400) directionX[i] = -1;
    if (movX[i]<0) directionX[i] = 1;
    if (movY[i]>400) directionY[i] = -1;
    if (movY[i]<0) directionY[i] = 1;
  }


  PVector surfaceMouse = surface.getTransformedMouse();

  // Draw the scene, offscreen
  offscreen.beginDraw();
  offscreen.background(0);
  offscreen.fill(0, 255, 0);
  offscreen.ellipse(surfaceMouse.x, surfaceMouse.y, 75, 75);

  for (int i=0; i<numCircle; i++) {
    offscreen.fill(colorCircle[i]);
    float _size = sizeCircle[i];
    offscreen.ellipse(movX[i], movY[i], _size, _size);
  }

  offscreen.endDraw();

  // most likely, you'll want a black background to minimize
  // bleeding around your projection area
  background(0);

  // render the scene, transformed using the corner pin surface
  surface.render(offscreen);
}


void keyPressed() {
  switch(key) {
  case 'c':
    // enter/leave calibration mode, where surfaces can be warped 
    // and moved
    keyStone.toggleCalibration();
    break;

  case 'l':
    // loads the saved layout
    keyStone.load();
    break;

  case 's':
    // saves the layout
    keyStone.save();
    break;
  }
}