Mimi Yin NYU-ITP

Drawing skeleton joints and bones.

 */

​

// Declare kinectron

let kinectron = null;

​

// Keep track of bodies

let bodies = {};

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  // Define and create an instance of kinectron

  kinectron = new Kinectron("192.168.0.100");

​

  // Connect with application over peer

  kinectron.makeConnection();

​

  // Request all tracked bodies and pass data to your callback

  kinectron.startTrackedBodies(bodyTracked);

​

  background(0);

}

​

function draw() {

  background(0);

  for (let b in bodies) {

    // Get this body using it's id

    let body = bodies[b];

​

    // Check to see if this body is dead

    // Delete dead bodies and move onto next one

    if (frameCount - body.frameCount > 30) {

      delete bodies[b];

      continue;

    }

​

    // Get all the joints off the tracked body and do something with them

    let joints = body.joints;

​

    // Mid-line

    let head = scaleJoint(joints[kinectron.HEAD]);

    let neck = scaleJoint(joints[kinectron.NECK]);

    let spineShoulder = scaleJoint(joints[kinectron.SPINESHOULDER]);

    let spineMid = scaleJoint(joints[kinectron.SPINEMID]);

    let spineBase = scaleJoint(joints[kinectron.SPINEBASE]);

​

    // Right Arm

    let shoulderRight = scaleJoint(joints[kinectron.SHOULDERRIGHT]);

    let elbowRight = scaleJoint(joints[kinectron.ELBOWRIGHT]);

    let wristRight = scaleJoint(joints[kinectron.WRISTRIGHT]);

    let handRight = scaleJoint(joints[kinectron.HANDRIGHT]);

    let handTipRight = scaleJoint(joints[kinectron.HANDTIPRIGHT]);

    let thumbRight = scaleJoint(joints[kinectron.THUMBRIGHT]);

​

    // Left Arm

    let shoulderLeft = scaleJoint(joints[kinectron.SHOULDERLEFT]);

    let elbowLeft = scaleJoint(joints[kinectron.ELBOWLEFT]);

    let wristLeft = scaleJoint(joints[kinectron.WRISTLEFT]);

    let handLeft = scaleJoint(joints[kinectron.HANDLEFT]);

    let handTipLeft = scaleJoint(joints[kinectron.HANDTIPLEFT]);

    let thumbLeft = scaleJoint(joints[kinectron.THUMBLEFT]);

​

    // Right Leg

    let hipRight = scaleJoint(joints[kinectron.HIPRIGHT]);

    let kneeRight = scaleJoint(joints[kinectron.KNEERIGHT]);

    let ankleRight = scaleJoint(joints[kinectron.ANKLERIGHT]);

    let footRight = scaleJoint(joints[kinectron.FOOTRIGHT]);

​

    // Left Leg

    let hipLeft = scaleJoint(joints[kinectron.HIPLEFT]);

    let kneeLeft = scaleJoint(joints[kinectron.KNEELEFT]);

    let ankleLeft = scaleJoint(joints[kinectron.ANKLELEFT]);

    let footLeft = scaleJoint(joints[kinectron.FOOTLEFT]);

​

    // Pick a joint to track

    let pos = handLeft;

​

    let newSpeed;

    // If this body has a ppos...

    if (body.ppos) {

      let speed = dist(pos.x, pos.y, body.ppos.x, body.ppos.y);

​

      fill(255, 0, 0, 10);

      noStroke();

      ellipse(pos.x, pos.y, speed * 5, speed * 5);

​

      // Use the average Speed to control speed of circle

      let aspeed = speed / 1000; // What about speed/100??

      //let aspeed = 0.1/speed;

​

      body.a += aspeed;

    }

​

    // Calculate circular pathway

    let x = cos(body.a) * width / 4 + width / 2;

    let y = sin(body.a) * width / 4 + height / 2;

    fill('white');

    noStroke();

    ellipse(x, y, 5, 5);

​

    // Create a ppos for this body

    body.ppos = pos;

  }

}

​

function bodyTracked(body) {

  let id = body.trackingId;

  if (id in bodies) {

    bodies[id].joints = body.joints;

    bodies[id].frameCount = frameCount;

  } else {

    console.log("NEW BODY!");

    bodies[id] = {

      joints: body.joints,

      frameCount: frameCount,

      ppos : null,

      a: 0

    }

  }

​

}

​

// Scale the joint position data to fit the screen

// 1. Move it to the center of the screen

// 2. Flip the y-value upside down

// 3. Return it as an object literal

function scaleJoint(joint) {

  return {

    x: (joint.cameraX * width / 2) + width / 2,

    y: (-joint.cameraY * width / 2) + height / 2,

  }

}

​

// Draw skeleton

function drawJoint(joint) {

​

  //console.log("JOINT OBJECT", joint);

  let pos = scaleJoint(joint);

​

  //Kinect location data needs to be normalized to canvas size

  stroke(255);

  strokeWeight(5);

  point(pos.x, pos.y);

}

​