Mimi Yin NYU-ITP

Drawing skeleton joints and bones.

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​

// Declare kinectron

let kinectron = null;

// Remember previous positions to calculate speed

let pposes = [];

​

// Variables for circle

let a = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  // Define and create an instance of kinectron

  kinectron = new Kinectron("10.17.201.104");

​

  // 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);

}

​

function bodyTracked(body) {

  background(0, 10);

​

  // Draw all the joints

  //kinectron.getJoints(drawJoint);

​

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

​

  // Mid-line

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

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

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

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

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

​

  // Right Arm

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

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

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

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

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

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

​

  // Left Arm

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

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

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

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

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

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

​

  // Right Leg

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

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

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

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

​

  // Left Leg

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

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

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

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

​

  // Pick joints to track

  let poses = [handLeft, handRight, head];

​

  // Find current average position of all the joints

  let newAvgSpeed = 0;

  // Average all the positions

  for (let p = 0; p < pposes.length; p++) {

    let pos = poses[p];

    let ppos = pposes[p];

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

    newAvgSpeed += speed;

  }

​

  if (pposes.length > 0) {

    newAvgSpeed /= pposes.length;

  }

​

  // Remember current positions for next time

  pposes = poses.slice();

​

  // Use the average speed to control speed of circle

  let aspeed = newAvgSpeed / 1000;

  a += aspeed;

​

  // Calculate circular pathway

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

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

  fill('white');

  noStroke();

  ellipse(x, y, 5, 5);

}

​

// 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);

}

​