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import SimpleOpenNI.*;

SimpleOpenNI  context;
color[] userClr = new color[] { 
  color(255, 0, 0), 
  color(0, 255, 0), 
  color(0, 0, 255), 
  color(255, 255, 0), 
  color(255, 0, 255), 
  color(0, 255, 255)
};
PVector com = new PVector();                                   
PVector com2d = new PVector();                                   


PVector rightHand = new PVector();
PVector rightHand2D = new PVector();


void setup() {

  size(640, 480);

  context = new SimpleOpenNI(this);

  if (context.isInit() == false) {
    println("Can't init SimpleOpenNI, maybe the camera is not connected!"); 
    exit();
    return;
  }


  context.enableDepth();
  context.enableUser();


  stroke(0, 0, 255);
  strokeWeight(3);
  smooth();
}

void draw() {

  background(30);

  context.update();

  image(context.userImage(), 0, 0, 120, 90);


  // draw the skeleton if it's available
  int[] userList = context.getUsers();

  for (int i=0; i<userList.length; i++) {

    if (context.isTrackingSkeleton(userList[i])) {
      stroke(userClr[ (userList[i] - 1) % userClr.length ] );
      drawSkeleton(userList[i]);
    }      

    // draw the center of mass
    if (context.getCoM(userList[i], com)) {
      context.convertRealWorldToProjective(com, com2d);
      stroke(100, 255, 0);
      strokeWeight(1);
      beginShape(LINES);
      vertex(com2d.x, com2d.y - 5);
      vertex(com2d.x, com2d.y + 5);

      vertex(com2d.x - 5, com2d.y);
      vertex(com2d.x + 5, com2d.y);
      endShape();


      fill(0, 255, 100);
      text(Integer.toString(userList[i]), com2d.x, com2d.y);


      // Draw Rectangle Right Hand !!!
      context.convertRealWorldToProjective(rightHand, rightHand2D);
      rect(rightHand2D.x, rightHand2D.y, 20, 20);
    }
  }
}

void drawSkeleton(int userId) {

  // to get the 3d joint data
  /*
  PVector jointPos = new PVector();
   context.getJointPositionSkeleton(userId,SimpleOpenNI.SKEL_NECK,jointPos);
   println(jointPos);
   */
  //

  // Right Hand Data
  context.getJointPositionSkeleton(userId, SimpleOpenNI.SKEL_RIGHT_HAND, rightHand);


  context.drawLimb(userId, SimpleOpenNI.SKEL_HEAD, SimpleOpenNI.SKEL_NECK);

  context.drawLimb(userId, SimpleOpenNI.SKEL_NECK, SimpleOpenNI.SKEL_LEFT_SHOULDER);
  context.drawLimb(userId, SimpleOpenNI.SKEL_LEFT_SHOULDER, SimpleOpenNI.SKEL_LEFT_ELBOW);
  context.drawLimb(userId, SimpleOpenNI.SKEL_LEFT_ELBOW, SimpleOpenNI.SKEL_LEFT_HAND);

  context.drawLimb(userId, SimpleOpenNI.SKEL_NECK, SimpleOpenNI.SKEL_RIGHT_SHOULDER);
  context.drawLimb(userId, SimpleOpenNI.SKEL_RIGHT_SHOULDER, SimpleOpenNI.SKEL_RIGHT_ELBOW);
  context.drawLimb(userId, SimpleOpenNI.SKEL_RIGHT_ELBOW, SimpleOpenNI.SKEL_RIGHT_HAND);

  context.drawLimb(userId, SimpleOpenNI.SKEL_LEFT_SHOULDER, SimpleOpenNI.SKEL_TORSO);
  context.drawLimb(userId, SimpleOpenNI.SKEL_RIGHT_SHOULDER, SimpleOpenNI.SKEL_TORSO);

  context.drawLimb(userId, SimpleOpenNI.SKEL_TORSO, SimpleOpenNI.SKEL_LEFT_HIP);
  context.drawLimb(userId, SimpleOpenNI.SKEL_LEFT_HIP, SimpleOpenNI.SKEL_LEFT_KNEE);
  context.drawLimb(userId, SimpleOpenNI.SKEL_LEFT_KNEE, SimpleOpenNI.SKEL_LEFT_FOOT);

  context.drawLimb(userId, SimpleOpenNI.SKEL_TORSO, SimpleOpenNI.SKEL_RIGHT_HIP);
  context.drawLimb(userId, SimpleOpenNI.SKEL_RIGHT_HIP, SimpleOpenNI.SKEL_RIGHT_KNEE);
  context.drawLimb(userId, SimpleOpenNI.SKEL_RIGHT_KNEE, SimpleOpenNI.SKEL_RIGHT_FOOT);
}

// -----------------------------------------------------------------
// SimpleOpenNI events

void onNewUser(SimpleOpenNI curContext, int userId)
{
  println("onNewUser - userId: " + userId);
  println("\tstart tracking skeleton");

  curContext.startTrackingSkeleton(userId);
}

void onLostUser(SimpleOpenNI curContext, int userId)
{
  println("onLostUser - userId: " + userId);
}

void onVisibleUser(SimpleOpenNI curContext, int userId)
{
  //println("onVisibleUser - userId: " + userId);
}


void keyPressed()
{
  switch(key)
  {
  case ' ':
    context.setMirror(!context.mirror());
    break;
  }
}