trackerstuff.js

// trackerstuff_holistic.js  — drop-in "Holistic-style" wrapper using Tasks API

let myHandLandmarker;
let myPoseLandmarker;
let myFaceLandmarker;
let lastVideoTime = -1;

const bSilenceMediapipeConsole = true;
const origLog   = console.log;
const origInfo  = console.info;
const origWarn  = console.warn;
const origError = console.error;


async function preloadTracker() {
  // Temporarily silence console spam while MediaPipe initializes
  if (bSilenceMediapipeConsole) {
    console.log  = function(){};
    console.info = function(){};
    console.warn = function(){};
    console.error = function(){};
  }

  const mp = await import('https://cdn.jsdelivr.net/npm/@mediapipe/tasks-vision/vision_bundle.js');

  const { HandLandmarker, PoseLandmarker, FaceLandmarker, FilesetResolver } = mp;
	window.FaceLandmarker = FaceLandmarker;
  window.PoseLandmarker = PoseLandmarker;

  const vision = await FilesetResolver.forVisionTasks(
    // Pin to a version you know works for you:
    // "https://cdn.jsdelivr.net/npm/@mediapipe/tasks-vision@0.10.21/wasm"
    // This RC (release candidate) build also works; swap if you prefer:
    "https://cdn.jsdelivr.net/npm/@mediapipe/tasks-vision@0.10.22-rc.20250304/wasm"
  );

  // HANDS
  if (trackingConfig.doAcquireHandLandmarks) {
    myHandLandmarker = await HandLandmarker.createFromOptions(vision, {
      numHands: trackingConfig.maxNumHands,
      runningMode: "VIDEO",
      baseOptions: {
        delegate: trackingConfig.cpuOrGpuString,
        modelAssetPath:
          "https://storage.googleapis.com/mediapipe-models/hand_landmarker/hand_landmarker/float16/1/hand_landmarker.task",
      },
    });
  }

  // POSE
  if (trackingConfig.doAcquirePoseLandmarks) {
    const poseModelLite =
      "https://storage.googleapis.com/mediapipe-models/pose_landmarker/pose_landmarker_lite/float16/1/pose_landmarker_lite.task";
    const poseModelFull =
      "https://storage.googleapis.com/mediapipe-models/pose_landmarker/pose_landmarker_full/float16/1/pose_landmarker_full.task";
    const poseModel =
      trackingConfig.poseModelLiteOrFull === "full" ? poseModelFull : poseModelLite;

    myPoseLandmarker = await PoseLandmarker.createFromOptions(vision, {
      numPoses: trackingConfig.maxNumPoses,
      runningMode: "VIDEO",
      baseOptions: {
        modelAssetPath: poseModel,
        delegate: trackingConfig.cpuOrGpuString,
      },
    });
  }

  // FACE
  if (trackingConfig.doAcquireFaceLandmarks) {
    myFaceLandmarker = await FaceLandmarker.createFromOptions(vision, {
      numFaces: trackingConfig.maxNumFaces,
      runningMode: "VIDEO",
      outputFaceBlendshapes: trackingConfig.doAcquireFaceMetrics,
      baseOptions: {
        delegate: trackingConfig.cpuOrGpuString,
        modelAssetPath:
          "https://storage.googleapis.com/mediapipe-models/face_landmarker/face_landmarker/float16/1/face_landmarker.task",
      },
    });
  }

  // Restore console once init is done
  if (bSilenceMediapipeConsole) {
    console.log  = origLog;
    console.info = origInfo;
    console.warn = origWarn;
    console.error = origError;
  }
  print("Tracker initialization complete.");
}

//------------------------------------------
function initiateTracking() {
  predictWebcam();
}

//------------------------------------------
async function predictWebcam() {
  // NOTE: This function produces:
  //   - handLandmarks = { landmarks:[ [...], ... ] }
  //   - poseLandmarks = { landmarks:[ [...33 pts] ] }
  //   - faceLandmarks = { faceLandmarks:[ [...468 pts] ], faceBlendshapes:[...] }
  // And also a convenience "holisticResults" bundle.

  const startTimeMs = performance.now();

  if (lastVideoTime !== myCapture.elt.currentTime) {
    const src = myCapture.elt;

    // Run the three Tasks in a "holistic" pass
    let hands   = null;
    let poses   = null;
    let faces   = null;

    if (trackingConfig.doAcquireHandLandmarks && myHandLandmarker) {
      hands = myHandLandmarker.detectForVideo(src, startTimeMs);
    }
    if (trackingConfig.doAcquirePoseLandmarks && myPoseLandmarker) {
      poses = myPoseLandmarker.detectForVideo(src, startTimeMs);
    }
    if (trackingConfig.doAcquireFaceLandmarks && myFaceLandmarker) {
      faces = myFaceLandmarker.detectForVideo(src, startTimeMs);
    }

	
		// Hands → { landmarks:[hand0, hand1, ...], 
		//           handednesses:[ "Left", "Right", ... ] }
		if (hands && hands.landmarks) {
			// shallow-copy landmark arrays
			handLandmarks = {
				landmarks: hands.landmarks.slice(),
				handednesses: []
			};
			for (let i=0; i<handLandmarks.landmarks.length; i++){
				let whichHand = hands.handednesses[i][0].categoryName;
				handLandmarks.handednesses.push(whichHand);
			}
			
		} else if (trackingConfig.doAcquireHandLandmarks) {
			handLandmarks = { 
				landmarks: [],
				handednesses: []
			};
		}

    // Pose → { landmarks:[pose0] }
    if (poses && poses.landmarks && poses.landmarks.length > 0) {
      poseLandmarks = { landmarks: [poses.landmarks[0]] };
    } else if (trackingConfig.doAcquirePoseLandmarks) {
      poseLandmarks = { landmarks: [] };
    }

    // Face → { faceLandmarks:[face0, ...], faceBlendshapes:[... or undefined] }
    if (faces && (faces.faceLandmarks || faces.landmarks)) {
      // Tasks API uses "faceLandmarks" for 468-pt array; some older builds exposed ".landmarks"
      const faceArray = faces.faceLandmarks || faces.landmarks || [];
      faceLandmarks = {
        faceLandmarks: faceArray.slice(),
        faceBlendshapes: faces.faceBlendshapes || undefined,
      };
    } else if (trackingConfig.doAcquireFaceLandmarks) {
      faceLandmarks = { faceLandmarks: [], faceBlendshapes: undefined };
    }

    lastVideoTime = myCapture.elt.currentTime;
  }

  window.requestAnimationFrame(predictWebcam);
}

/* --------------------------------------------------------------
   DRAW HELPERS + CONNECTORS
-----------------------------------------------------------------*/

//------------------------------------------
// HANDS: 21 2D landmarks per hand, up to maxNumHands at once
function drawHandPoints() {
  if (trackingConfig.doAcquireHandLandmarks) {
    if (handLandmarks && handLandmarks.landmarks) {
      const nHands = handLandmarks.landmarks.length;

      if (nHands > 0) {
        // Draw lines connecting the joints of the fingers
        noFill();
		  // strokeWeight(0.1);
        stroke(50);
        
        strokeWeight(2.0);
        for (let h = 0; h < nHands; h++) {
          let joints = handLandmarks.landmarks[h];
          drawConnectors(joints, HANDLANDMARKER_PALM);
          drawConnectors(joints, HANDLANDMARKER_THUMB);
          drawConnectors(joints, HANDLANDMARKER_INDEX_FINGER);
          drawConnectors(joints, HANDLANDMARKER_MIDDLE_FINGER);
          drawConnectors(joints, HANDLANDMARKER_RING_FINGER);
          drawConnectors(joints, HANDLANDMARKER_PINKY);
        }
        
        // Draw just the joints of the hands
        
        // stroke("black");
        // fill("red");
        for (let h = 0; h < nHands; h++) {
          let joints = handLandmarks.landmarks[h];
          for (let i = 0; i <= 20; i++) {
            let px = joints[i].x;
            let py = joints[i].y;
            px = map(px, 0, 1, width, 0);
            py = map(py, 0, 1, 0, height);
            circle(px, py, 9);
          }
        }
				
				// Draw the name of the hand
				// noStroke(); 
				// fill('black');
				// textSize(12); 
				// for (let h = 0; h < nHands; h++) {
				// 	let whichHandStr = handLandmarks.handednesses[h]; 
				// 	let px = handLandmarks.landmarks[h][0].x;
				// 	let py = handLandmarks.landmarks[h][0].y;
				// 	px = map(px, 0, 1, width, 0);
    //       py = map(py, 0, 1, 0, height);
				// 	text(whichHandStr, px,py+20); 
				// }
      }
    }
  }
}


//------------------------------------------
// 33 joints of the body.  
function drawPosePoints(){
  if (trackingConfig.doAcquirePoseLandmarks) {
    if (poseLandmarks && poseLandmarks.landmarks) {
      const nPoses = poseLandmarks.landmarks.length;
      if (nPoses > 0) {
        
        // Draw lines connecting the joints of the body
        noFill();
        stroke("darkblue");
        strokeWeight(2.0);
        for (let h = 0; h < nPoses; h++) {
          let joints = poseLandmarks.landmarks[h];
          drawConnectors(joints, PoseLandmarker.POSE_CONNECTIONS);
        }
      }
    }
  }
}


//------------------------------------------
// Tracks 478 points on the face. 
function drawFacePoints() {
  if (trackingConfig.doAcquireFaceLandmarks) {
    if (faceLandmarks && faceLandmarks.faceLandmarks) {
      const nFaces = faceLandmarks.faceLandmarks.length;
      if (nFaces > 0) {
        for (let f = 0; f < nFaces; f++) {
          let aFace = faceLandmarks.faceLandmarks[f];
          if (aFace) {
            let nFaceLandmarks = aFace.length;
            
            noFill();
            stroke("black");
            strokeWeight(1.0);
            for (let i = 0; i < nFaceLandmarks; i++) {
              let px = aFace[i].x;
              let py = aFace[i].y;
              px = map(px, 0, 1, width, 0);
              py = map(py, 0, 1, 0, height);
              circle(px, py, 1);
            }
            
            noFill();
            stroke("black");
            strokeWeight(2.0);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_RIGHT_EYE);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_RIGHT_EYEBROW);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_LEFT_EYE);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_LEFT_EYEBROW);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_FACE_OVAL);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_LIPS);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_RIGHT_IRIS);
            drawConnectors(aFace, FaceLandmarker.FACE_LANDMARKS_LEFT_IRIS);
            drawConnectors(aFace, FACELANDMARKER_NOSE); // Google offers no nose
          }
        }
      }
    }
  }
}


//------------------------------------------
function drawFaceMetrics(){
  if (trackingConfig.doAcquireFaceLandmarks && 
      trackingConfig.doAcquireFaceMetrics){
    if (faceLandmarks && faceLandmarks.faceBlendshapes) {
      const nFaces = faceLandmarks.faceLandmarks.length;
      for (let f = 0; f < nFaces; f++) {
        let aFaceMetrics = faceLandmarks.faceBlendshapes[f];
        if (aFaceMetrics){
          
          fill('black'); 
          textSize(7); 
          let tx = 40; 
          let ty = 40; 
          let dy = 8.5;
          let vx0 = tx-5; 
          let vx1 = tx-35;
          
          let nMetrics = aFaceMetrics.categories.length; 
          for (let i=1; i<nMetrics; i++){
            let metricName = aFaceMetrics.categories[i].categoryName;
            noStroke();
            text(metricName, tx,ty); 
            
            let metricValue = aFaceMetrics.categories[i].score;
            let vx = map(metricValue,0,1,vx0,vx1);
            stroke(0,0,0); 
            strokeWeight(2.0); 
            line(vx0,ty-2, vx,ty-2); 
            stroke(0,0,0,20);
            line(vx0,ty-2, vx1,ty-2); 
            ty+=dy;
          }
        }
      }
    }
  }
}


//------------------------------------------
function drawConnectors(landmarks, connectorSet) {
  if (landmarks) {
    let nConnectors = connectorSet.length;
    for (let i=0; i<nConnectors; i++){
      let index0 = connectorSet[i].start; 
      let index1 = connectorSet[i].end;
      let x0 = map(landmarks[index0].x, 0,1, width,0);
      let y0 = map(landmarks[index0].y, 0,1, 0,height);
      let x1 = map(landmarks[index1].x, 0,1, width,0);
      let y1 = map(landmarks[index1].y, 0,1, 0,height);
      line(x0,y0, x1,y1); 
    }
  }
}

/////////////////////////////////////////////////////////////////////
// here's where vertex indices and triangulation are defined.
// hint: you'll need either of the following to view this file
// with correct formatting:
// A) a large monitor
// B) an editor that is not editor.p5js.org and has
//    non-wrapping lines or less huge font size

//------------------------------------------
// HAND:
//
const WRIST = 0; 
const THUMB_CMC = 1; 
const THUMB_MCP = 2; 
const THUMB_IP = 3; 
const THUMB_TIP = 4; 
const INDEX_FINGER_MCP = 5; 
const INDEX_FINGER_PIP = 6; 
const INDEX_FINGER_DIP = 7; 
const INDEX_FINGER_TIP = 8; 
const MIDDLE_FINGER_MCP = 9; 
const MIDDLE_FINGER_PIP = 10; 
const MIDDLE_FINGER_DIP = 11; 
const MIDDLE_FINGER_TIP = 12; 
const RING_FINGER_MCP = 13; 
const RING_FINGER_PIP = 14; 
const RING_FINGER_DIP = 15; 
const RING_FINGER_TIP = 16; 
const PINKY_MCP = 17; 
const PINKY_PIP = 18; 
const PINKY_DIP = 19; 
const PINKY_TIP = 20; 

const HAND_VERTEX_INDICES = [
  [PINKY_MCP,WRIST,THUMB_CMC,INDEX_FINGER_MCP,MIDDLE_FINGER_MCP,RING_FINGER_MCP,PINKY_MCP],
  [THUMB_CMC,THUMB_MCP,THUMB_IP,THUMB_TIP],
  [INDEX_FINGER_MCP,INDEX_FINGER_PIP,INDEX_FINGER_DIP,INDEX_FINGER_TIP],
  [MIDDLE_FINGER_MCP,MIDDLE_FINGER_PIP,MIDDLE_FINGER_DIP,MIDDLE_FINGER_TIP],
  [RING_FINGER_MCP,RING_FINGER_PIP,RING_FINGER_DIP,RING_FINGER_TIP],
  [PINKY_MCP,PINKY_PIP,PINKY_DIP,PINKY_TIP],
  ];

const FACELANDMARKER_NOSE = [{start:168,end:6},{start:6,end:195},{start:195,end:4},{start:98,end:97},{start:97,end:2},{start:2,end:326},{start:326,end:327}];

const HANDLANDMARKER_PALM = [
  {start:PINKY_MCP,end:WRIST}, 
  {start:WRIST,end:THUMB_CMC}, 
  {start:THUMB_CMC,end:INDEX_FINGER_MCP},
  {start:INDEX_FINGER_MCP,end:MIDDLE_FINGER_MCP},
  {start:MIDDLE_FINGER_MCP,end:RING_FINGER_MCP},
  {start:RING_FINGER_MCP,end:PINKY_MCP}];
const HANDLANDMARKER_THUMB = [
  {start:THUMB_CMC,end:THUMB_MCP},
  {start:THUMB_MCP,end:THUMB_IP},
  {start:THUMB_IP,end:THUMB_TIP}];
const HANDLANDMARKER_INDEX_FINGER = [
  {start:INDEX_FINGER_MCP,end:INDEX_FINGER_PIP},
  {start:INDEX_FINGER_PIP,end:INDEX_FINGER_DIP},
  {start:INDEX_FINGER_DIP,end:INDEX_FINGER_TIP}];
const HANDLANDMARKER_MIDDLE_FINGER = [
  {start:MIDDLE_FINGER_MCP,end:MIDDLE_FINGER_PIP},
  {start:MIDDLE_FINGER_PIP,end:MIDDLE_FINGER_DIP},
  {start:MIDDLE_FINGER_DIP,end:MIDDLE_FINGER_TIP}];
const HANDLANDMARKER_RING_FINGER = [
  {start:RING_FINGER_MCP,end:RING_FINGER_PIP},
  {start:RING_FINGER_PIP,end:RING_FINGER_DIP},
  {start:RING_FINGER_DIP,end:RING_FINGER_TIP}];
const HANDLANDMARKER_PINKY = [
  {start:PINKY_MCP,end:PINKY_PIP},
  {start:PINKY_PIP,end:PINKY_DIP},
  {start:PINKY_DIP,end:PINKY_TIP}];


//------------------------------------------
// POSE:
//
/*
// TODO: provide accessors for these points from the POSE vertices
0 - nose
1 - left eye (inner)
2 - left eye
3 - left eye (outer)
4 - right eye (inner)
5 - right eye
6 - right eye (outer)
7 - left ear
8 - right ear
9 - mouth (left)
10 - mouth (right)
11 - left shoulder
12 - right shoulder
13 - left elbow
14 - right elbow
15 - left wrist
16 - right wrist
17 - left pinky
18 - right pinky
19 - left index
20 - right index
21 - left thumb
22 - right thumb
23 - left hip
24 - right hip
25 - left knee
26 - right knee
27 - left ankle
28 - right ankle
29 - left heel
30 - right heel
31 - left foot index
32 - right foot index
*/


//------------------------------------------
// FACE: vertices and triangle triplets for:
// 7-POINT-FACEMESH, 33-POINT-FACEMESH, 68-POINT-FACEMESH, 468-POINT-FACEMESH
//
var VTX7 = [33,133,362,263,1,78,308];
var VTX33 = [33,133,362,263,1,62,308,159,145,386,374,6,102,331,2,13,14,70,105,107,336,334,300,54,10,284,50,280,234,454,58,288,152]
var VTX68 = [
  /* contour  */127,234,132, 58,172,150,149,148,152,377,378,379,397,288,361,454,356,
  /* brows    */ 70, 63,105, 66,107,336,296,334,293,300,
  /* nose     */168,  6,195,  4, 98, 97,  2,326,327,
  /* eyes     */ 33,160,158,133,153,144,362,385,387,263,373,380,
  /* lip      */ 57, 40, 37,  0,267,270,287,321,314, 17, 84, 91,
  /* mouth    */ 78, 81, 13,311,308,402, 14,178,
]
var VTX468 = new Array(468).fill(0).map((x,i)=>i);

var TRI7 = [0,1,4,2,3,4,4,6,5]
var TRI33 = [
  /*  eyes  */ 0, 7 ,8 ,   7, 1, 8,   2, 9,10,   9, 3,10, 
  /*  brows */ 17,18,0 ,  18, 7, 0,  18,19, 7,  19, 1, 7,  19,11, 1,  19,20,11,  21,22, 3,  21, 3, 9,  20,21, 9,  20, 9, 2,  20, 2,11,
  /*  4head */ 23,18,17,  25,22,21,  24,19,20,  24,19,18,  24,21,20,  24,18,23,  24,25,21, 
  /*  nose  */ 11,4 ,12,  11,13, 4,   1,11,12,  11, 2,13,  12, 4,14,   4,13,14, 
  /* up-lip */ 14,15, 5,  14, 6,15,  12,14, 5,  14,13, 6,  
  /* cheeks */ 8 , 1,12,   2,10,13,   8,12,26,  10,27,13,  26,12, 5,  13,27, 6,   0, 8,26,  10,3,27,
  /*  chin  */ 5, 16,32,  16, 6,32,   5,32,30,   6,31,32,  
  /*  cont  */ 26, 5,30,  27,31, 6,   0,26,28,   3,29,27,  17, 0,28,   3,22,29,  23,17,28,  22,25,29,  28,26,30,  27,29,31,
]
// stolen from https://age2death.glitch.me/
var TRI68 = [
   0, 1,36,   0,17,36,   1, 2,41,  1,36,41,  2, 3,31,  2,31,41,  3, 4,48,  3,31,48,  4, 5,48,  5, 6,48,
   6, 7,59,   6,48,59,   7, 8,58,  7,58,59,  8, 9,56,  8,56,57,  8,57,58,  9,10,55,  9,55,56, 10,11,54,
  10,54,55,  11,12,54,  12,13,54, 13,14,35, 13,35,54, 14,15,46, 14,35,46, 15,16,45, 15,45,46, 16,26,45,
  17,18,36,  18,19,37,  18,36,37, 19,20,38, 19,37,38, 20,21,39, 20,38,39, 21,27,39, 22,23,42, 22,27,42,
  23,24,43,  23,42,43,  24,25,44, 24,43,44, 25,26,45, 25,44,45, 27,28,39, 27,28,42, 28,29,39, 28,29,42,
  29,30,31,  29,30,35,  29,31,40, 29,35,47, 29,40,39, 29,42,47, 30,31,32, 30,32,33, 30,33,34, 30,34,35,
  31,32,50,  31,40,41,  31,48,49, 31,49,50, 32,33,51, 32,50,51, 33,34,51, 34,35,52, 34,51,52, 35,46,47,
  35,52,53,  35,53,54,  36,37,41, 37,38,40, 37,40,41, 38,39,40, 42,43,47, 43,44,47, 44,45,46, 44,46,47,
  48,49,60,  48,59,60,  49,50,61, 49,60,61, 50,51,62, 50,61,62, 51,52,62, 52,53,63, 52,62,63, 53,54,64,
  53,63,64,  54,55,64,  55,56,65, 55,64,65, 56,57,66, 56,65,66, 57,58,66, 58,59,67, 58,66,67, 59,60,67,
  60,61,67,  61,62,66,  61,66,67, 62,63,66, 63,64,65, 63,65,66, 21,22,27,
];

// stolen from https://storage.googleapis.com/tfjs-models/demos/facemesh/demo.fd0b9f10.js
var TRI468 = 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