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leapMotion.html
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<!DOCTYPE html>
<!--
/------------------------------------------------------------------------------\
| Copyright (C) 2012-2013 Leap Motion, Inc. All rights reserved. |
| Leap Motion proprietary and confidential. Not for distribution. |
| Use subject to the terms of the Leap Motion SDK Agreement available at |
| https://developer.leapmotion.com/sdk_agreement, or another agreement |
| between Leap Motion and you, your company or other organization. |
\------------------------------------------------------------------------------/
-->
<!--
See additional libraries, guides, and examples at:
- https://developer.leapmotion.com/downloads/javascript
- https://developer.leapmotion.com/getting-started/javascript
- https://developer.leapmotion.com/gallery/tags/javascript
-->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Leap Motion JavaScript Sample</title>
<script src="http://js.leapmotion.com/leap-0.6.3.min.js"></script>
<script>
// Store frame for motion functions
var previousFrame = null;
var paused = false;
var pauseOnGesture = false;
// Setup Leap loop with frame callback function
var controllerOptions = {enableGestures: true};
// to use HMD mode:
// controllerOptions.optimizeHMD = true;
Leap.loop(controllerOptions, function(frame) {
if (paused) {
return; // Skip this update
}
// Display Frame object data
var frameOutput = document.getElementById("frameData");
var frameString = "Frame ID: " + frame.id + "<br />"
+ "Timestamp: " + frame.timestamp + " µs<br />"
+ "Hands: " + frame.hands.length + "<br />"
+ "Fingers: " + frame.fingers.length + "<br />"
+ "Tools: " + frame.tools.length + "<br />"
+ "Gestures: " + frame.gestures.length + "<br />";
// Frame motion factors
if (previousFrame && previousFrame.valid) {
var translation = frame.translation(previousFrame);
frameString += "Translation: " + vectorToString(translation) + " mm <br />";
var rotationAxis = frame.rotationAxis(previousFrame);
var rotationAngle = frame.rotationAngle(previousFrame);
frameString += "Rotation axis: " + vectorToString(rotationAxis, 2) + "<br />";
frameString += "Rotation angle: " + rotationAngle.toFixed(2) + " radians<br />";
var scaleFactor = frame.scaleFactor(previousFrame);
frameString += "Scale factor: " + scaleFactor.toFixed(2) + "<br />";
}
frameOutput.innerHTML = "<div style='width:300px; float:left; padding:5px'>" + frameString + "</div>";
// Display Hand object data
var handOutput = document.getElementById("handData");
var handString = "";
if (frame.hands.length > 0) {
for (var i = 0; i < frame.hands.length; i++) {
var hand = frame.hands[i];
handString += "<div style='width:300px; float:left; padding:5px'>";
handString += "Hand ID: " + hand.id + "<br />";
handString += "Type: " + hand.type + " hand" + "<br />";
handString += "Direction: " + vectorToString(hand.direction, 2) + "<br />";
handString += "Palm position: " + vectorToString(hand.palmPosition) + " mm<br />";
handString += "Grab strength: " + hand.grabStrength + "<br />";
handString += "Pinch strength: " + hand.pinchStrength + "<br />";
handString += "Confidence: " + hand.confidence + "<br />";
handString += "Arm direction: " + vectorToString(hand.arm.direction()) + "<br />";
handString += "Arm center: " + vectorToString(hand.arm.center()) + "<br />";
handString += "Arm up vector: " + vectorToString(hand.arm.basis[1]) + "<br />";
// Hand motion factors
if (previousFrame && previousFrame.valid) {
var translation = hand.translation(previousFrame);
handString += "Translation: " + vectorToString(translation) + " mm<br />";
var rotationAxis = hand.rotationAxis(previousFrame, 2);
var rotationAngle = hand.rotationAngle(previousFrame);
handString += "Rotation axis: " + vectorToString(rotationAxis) + "<br />";
handString += "Rotation angle: " + rotationAngle.toFixed(2) + " radians<br />";
var scaleFactor = hand.scaleFactor(previousFrame);
handString += "Scale factor: " + scaleFactor.toFixed(2) + "<br />";
}
// IDs of pointables associated with this hand
if (hand.pointables.length > 0) {
var fingerIds = [];
for (var j = 0; j < hand.pointables.length; j++) {
var pointable = hand.pointables[j];
fingerIds.push(pointable.id);
}
if (fingerIds.length > 0) {
handString += "Fingers IDs: " + fingerIds.join(", ") + "<br />";
}
}
handString += "</div>";
}
}
else {
handString += "No hands";
}
handOutput.innerHTML = handString;
// Display Pointable (finger and tool) object data
var pointableOutput = document.getElementById("pointableData");
var pointableString = "";
if (frame.pointables.length > 0) {
var fingerTypeMap = ["Thumb", "Index finger", "Middle finger", "Ring finger", "Pinky finger"];
var boneTypeMap = ["Metacarpal", "Proximal phalanx", "Intermediate phalanx", "Distal phalanx"];
for (var i = 0; i < frame.pointables.length; i++) {
var pointable = frame.pointables[i];
pointableString += "<div style='width:250px; float:left; padding:5px'>";
if (pointable.tool) {
pointableString += "Pointable ID: " + pointable.id + "<br />";
pointableString += "Classified as a tool <br />";
pointableString += "Length: " + pointable.length.toFixed(1) + " mm<br />";
pointableString += "Width: " + pointable.width.toFixed(1) + " mm<br />";
pointableString += "Direction: " + vectorToString(pointable.direction, 2) + "<br />";
pointableString += "Tip position: " + vectorToString(pointable.tipPosition) + " mm<br />"
pointableString += "</div>";
}
else {
pointableString += "Pointable ID: " + pointable.id + "<br />";
pointableString += "Type: " + fingerTypeMap[pointable.type] + "<br />";
pointableString += "Belongs to hand with ID: " + pointable.handId + "<br />";
pointableString += "Classified as a finger<br />";
pointableString += "Length: " + pointable.length.toFixed(1) + " mm<br />";
pointableString += "Width: " + pointable.width.toFixed(1) + " mm<br />";
pointableString += "Direction: " + vectorToString(pointable.direction, 2) + "<br />";
pointableString += "Extended?: " + pointable.extended + "<br />";
pointable.bones.forEach( function(bone){
pointableString += boneTypeMap[bone.type] + " bone <br />";
pointableString += "Center: " + vectorToString(bone.center()) + "<br />";
pointableString += "Direction: " + vectorToString(bone.direction()) + "<br />";
pointableString += "Up vector: " + vectorToString(bone.basis[1]) + "<br />";
});
pointableString += "Tip position: " + vectorToString(pointable.tipPosition) + " mm<br />";
pointableString += "</div>";
}
}
}
else {
pointableString += "<div>No pointables</div>";
}
pointableOutput.innerHTML = pointableString;
// Display Gesture object data
var gestureOutput = document.getElementById("gestureData");
var gestureString = "";
if (frame.gestures.length > 0) {
if (pauseOnGesture) {
togglePause();
}
for (var i = 0; i < frame.gestures.length; i++) {
var gesture = frame.gestures[i];
gestureString += "Gesture ID: " + gesture.id + ", "
+ "type: " + gesture.type + ", "
+ "state: " + gesture.state + ", "
+ "hand IDs: " + gesture.handIds.join(", ") + ", "
+ "pointable IDs: " + gesture.pointableIds.join(", ") + ", "
+ "duration: " + gesture.duration + " µs, ";
switch (gesture.type) {
case "circle":
gestureString += "center: " + vectorToString(gesture.center) + " mm, "
+ "normal: " + vectorToString(gesture.normal, 2) + ", "
+ "radius: " + gesture.radius.toFixed(1) + " mm, "
+ "progress: " + gesture.progress.toFixed(2) + " rotations";
break;
case "swipe":
gestureString += "start position: " + vectorToString(gesture.startPosition) + " mm, "
+ "current position: " + vectorToString(gesture.position) + " mm, "
+ "direction: " + vectorToString(gesture.direction, 1) + ", "
+ "speed: " + gesture.speed.toFixed(1) + " mm/s";
break;
case "screenTap":
case "keyTap":
gestureString += "position: " + vectorToString(gesture.position) + " mm";
break;
default:
gestureString += "unkown gesture type";
}
gestureString += "<br />";
}
}
else {
gestureString += "No gestures";
}
gestureOutput.innerHTML = gestureString;
// Store frame for motion functions
previousFrame = frame;
})
function vectorToString(vector, digits) {
if (typeof digits === "undefined") {
digits = 1;
}
return "(" + vector[0].toFixed(digits) + ", "
+ vector[1].toFixed(digits) + ", "
+ vector[2].toFixed(digits) + ")";
}
function togglePause() {
paused = !paused;
if (paused) {
document.getElementById("pause").innerText = "Resume";
} else {
document.getElementById("pause").innerText = "Pause";
}
}
function pauseForGestures() {
if (document.getElementById("pauseOnGesture").checked) {
pauseOnGesture = true;
} else {
pauseOnGesture = false;
}
}
</script>
</head>
<body>
<h1>Leap Motion JavaScript Sample</h1>
<div id="main">
<button id="pause" onclick="togglePause()">Pause</button>
<input type="checkbox" id="pauseOnGesture" onclick="pauseForGestures()">Pause on gesture</input>
<h3>Frame data:</h3>
<div id="frameData"></div>
<div style="clear:both;"></div>
<h3>Hand data:</h3>
<div id="handData"></div>
<div style="clear:both;"></div>
<h3>Finger and tool data:</h3>
<div id="pointableData"></div>
<div style="clear:both;"></div>
<h3>Gesture data:</h3>
<div id="gestureData"></div>
</div>
</body>
</html>