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Various updates

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Enhanced the pointer.
Cleaned up the code.
Added additional optional parameters.
Updated documentation.

modified:   README.md
modified:   index.html
modified:   plugin/leap/leap.js
This commit is contained in:
Rory Hardy 2013-08-07 21:53:31 -05:00
parent 1d895bad61
commit bd543e5cee
3 changed files with 74 additions and 46 deletions
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14
README.md
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@ -628,10 +628,10 @@ Reveal.initialize({
## Leap Motion
The Leap Motion plugin lets you utilize your [Leap Motion](https://www.leapmotion.com/) device to control basic navigation of your presentation. The gestures currently supported are:
##### 1 hand + 1 finger
##### 1 to 2 fingers
* Pointer — Point to anything on screen. Move your finger past the device to expand the pointer.
##### 1 hand + 2 or more fingers
##### 1 hand + 3 or more fingers
* Left
* Right
@ -647,11 +647,13 @@ Toggle the overview mode. Do it a second time to exit the overview.
#### Config Options
You can edit the following options:
* naturalSwipe: Defaults to true. Swipe as though you were touching a touch screen. Set to false to invert.
* pointerSize: Defaults to 15. The minimum height and width of the pointer.
* pointerColor: Defaults to #00aaff. The color of the pointer.
* pointerOpacity: Defaults to 0.75. The opacity of the pointer.
* autoCenter: Defaults to true. Center the pointer based on where you put your finger into the leap motions detection field.
* gestureDelay: Defaults to 500. How long to delay between gestures in milliseconds.
* naturalSwipe: Defaults to true. Swipe as though you were touching a touch screen. Set to false to invert.
* pointerColor: Defaults to #00aaff. The color of the pointer.
* pointerOpacity: Defaults to 0.7. The opacity of the pointer.
* pointerSize: Defaults to 15. The minimum height and width of the pointer.
* pointerTolerance: Defaults to 120. Bigger = slower pointer.
Example configuration:
```js

3
index.html
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@ -370,7 +370,8 @@ function linkify( selector ) {
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'plugin/zoom-js/zoom.js', async: true, condition: function() { return !!document.body.classList; } },
{ src: 'plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } }
{ src: 'plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } },
{ src: 'plugin/leap/leap.js', async: true }
// { src: 'plugin/search/search.js', async: true, condition: function() { return !!document.body.classList; } }
// { src: 'plugin/remotes/remotes.js', async: true, condition: function() { return !!document.body.classList; } }
]

103
plugin/leap/leap.js
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@ -23,78 +23,103 @@ var b=right.criteria;if(a!==b){if(a>b||a===void 0)return 1;if(a<b||b===void 0)re
*/
(function () {
var controller = new Leap.Controller({ enableGestures: true }),
leapConfig = Reveal.getConfig().leap,
pointer = document.createElement('div'),
body = document.body,
var body = document.body,
controller = new Leap.Controller({ enableGestures: true }),
lastGesture = 0,
leapConfig = Reveal.getConfig().leap,
pointer = document.createElement( 'div' ),
config = {
naturalSwipe : true, // Swipe as if it were a touch screen.
pointerSize : 15, // Default height/width of the pointer.
pointerColor : '#00aaff', // Default color of the pointer.
pointerOpacity : 0.75, // Default opacity of the pointer.
gestureDelay : 500 // How long to delay between gestures.
autoCenter : true, // Center pointer around detected position.
gestureDelay : 500, // How long to delay between gestures.
naturalSwipe : true, // Swipe as if it were a touch screen.
pointerColor : '#00aaff', // Default color of the pointer.
pointerOpacity : 0.7, // Default opacity of the pointer.
pointerSize : 15, // Default height/width of the pointer.
pointerTolerance : 120 // Bigger = slower pointer.
},
now;
now,
entered;
// Merge user defined settings with defaults
if ( leapConfig ) {
for (key in leapConfig) {
if( leapConfig ) {
for( key in leapConfig ) {
config[key] = leapConfig[key];
}
}
pointer.id = 'leap';
pointer.style.filter = 'alpha(opacity="' + config.pointerOpacity * 100 + '")';
pointer.style.opacity = config.pointerOpacity;
pointer.style.backgroundColor = config.pointerColor;
body.appendChild(pointer);
body.appendChild( pointer );
controller.on('frame', function (frame) {
// Leap's loop
controller.on( 'frame', function ( frame ) {
// Timing code to rate limit gesture execution
now = new Date().getTime();
// Pointer code
if ( frame.hands.length === 1 && frame.fingers.length === 1 ) {
var size = -2 * frame.hands[0].palmPosition[2];
// Pointer: 1 to 2 fingers. Strictly one finger works but may cause innaccuracies.
// The innaccuracies were observed on a development model and may not be an issue with consumer models.
if( frame.fingers.length > 0 && frame.fingers.length < 3 ) {
// Invert direction and multiply by 3 for greater effect.
var size = -3 * frame.fingers[0].tipPosition[2];
if ( size < config.pointerSize ) {
size = config.pointerSize
if( size < config.pointerSize ) {
size = config.pointerSize;
}
pointer.style.bottom =
frame.hands[0].palmPosition[1] * (body.offsetHeight / 100) - body.offsetHeight + 'px';
pointer.style.left =
frame.hands[0].palmPosition[0] * (body.offsetWidth / 100) + (body.offsetWidth / 2) + 'px';
pointer.style.visibility = 'visible';
pointer.style.width = size + 'px';
pointer.style.height = size + 'px';
pointer.style.borderRadius = size - 5 + 'px';
}
pointer.style.visibility = 'visible';
tipPosition = frame.fingers[0].tipPosition;
if( config.autoCenter ) {
// Check whether the finger has entered the z range of the Leap Motion. Used for the autoCenter option.
if( !entered ) {
entered = true;
enteredPosition = frame.fingers[0].tipPosition;
}
pointer.style.top =
(-1 * (( tipPosition[1] - enteredPosition[1] ) * body.offsetHeight / config.pointerTolerance )) +
( body.offsetHeight / 2 ) + 'px';
pointer.style.left =
(( tipPosition[0] - enteredPosition[0] ) * body.offsetWidth / config.pointerTolerance ) +
( body.offsetWidth / 2 ) + 'px';
}
else {
pointer.style.top = ( 1 - (( tipPosition[1] - 50) / config.pointerTolerance )) *
body.offsetHeight + 'px';
pointer.style.left = ( tipPosition[0] * body.offsetWidth / config.pointerTolerance ) +
( body.offsetWidth / 2 ) + 'px';
}
}
else {
// Hide pointer on exit
entered = false;
pointer.style.visibility = 'hidden';
}
// Gestures
if ( frame.gestures.length > 0 && (now - lastGesture) > config.gestureDelay ) {
if( frame.gestures.length > 0 && (now - lastGesture) > config.gestureDelay ) {
var gesture = frame.gestures[0];
// One hand gestures
if( frame.hands.length === 1 ) {
// Swipe gestures. 2+ fingers.
if ( frame.fingers.length > 1 && gesture.type === 'swipe' ) {
// Swipe gestures. 3+ fingers.
if( frame.fingers.length > 2 && gesture.type === 'swipe' ) {
// Define here since some gestures will throw undefined for these.
var x = gesture.direction[0],
y = gesture.direction[1];
// Left/right swipe gestures
if ( Math.abs(x) > Math.abs(y) ) {
if ( x > 0 ) {
if( Math.abs( x ) > Math.abs( y )) {
if( x > 0 ) {
config.naturalSwipe ? Reveal.left() : Reveal.right();
}
else {
@ -105,7 +130,7 @@ var b=right.criteria;if(a!==b){if(a>b||a===void 0)return 1;if(a<b||b===void 0)re
// Up/down swipe gestures
}
else {
if ( y > 0 ) {
if( y > 0 ) {
config.naturalSwipe ? Reveal.down() : Reveal.up();
}
else {
@ -115,11 +140,11 @@ var b=right.criteria;if(a!==b){if(a>b||a===void 0)return 1;if(a<b||b===void 0)re
lastGesture = now;
}
}
// Two hand gestures
}
else if ( frame.hands.length == 2 ) {
// All upwards 2 hand gestures = toggle overview
if ( gesture.direction[1] > 0 ) {
// Two hand gestures
else if( frame.hands.length === 2 ) {
// Upward two hand swipe gesture
if( gesture.direction[1] > 0 && gesture.type === 'swipe' ) {
Reveal.toggleOverview();
}