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zig-full.js
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//////////////////////////////
// NEW SHIT FROM CHRIS!
//////////////////////////////
function simple_moving_averager(period) {
var nums = [];
return function(num) {
nums.push(num);
if (nums.length > period)
nums.splice(0,1); // remove the first element of the array
var sum = 0;
nums.each(function(i) {
sum += i;
});
var n = period;
if (nums.length < period)
n = nums.length;
return(sum/n);
};
}
//////////////////////////////
// script: zig.js
// ZDK for Javascript
if ('undefined' == typeof zig) {
// Minified version of sylvester, used internally
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v.u([V[0]+R[0][0]*x+R[0][1]*y,V[1]+R[1][0]*x+R[1][1]*y]);1I;27 3:o(!a.U){8 w}9 C=a.1r(7).4;R=S.1R(t,a.U).4;x=7.4[0]-C[0];y=7.4[1]-C[1];z=7.4[2]-C[2];8 v.u([C[0]+R[0][0]*x+R[0][1]*y+R[0][2]*z,C[1]+R[1][0]*x+R[1][1]*y+R[1][2]*z,C[2]+R[2][0]*x+R[2][1]*y+R[2][2]*z]);1I;2P:8 w}},1t:l(a){o(a.K){9 P=7.4.2O();9 C=a.1r(P).4;8 v.u([C[0]+(C[0]-P[0]),C[1]+(C[1]-P[1]),C[2]+(C[2]-(P[2]||0))])}1d{9 Q=a.4||a;o(7.4.q!=Q.q){8 w}8 7.1b(l(x,i){8 Q[i-1]+(Q[i-1]-x)})}},1N:l(){9 V=7.1q();2S(V.4.q){27 3:1I;27 2:V.4.19(0);1I;2P:8 w}8 V},2n:l(){8\'[\'+7.4.2K(\', \')+\']\'},26:l(a){7.4=(a.4||a).2O();8 7}};v.u=l(a){9 V=25 v();8 V.26(a)};v.i=v.u([1,0,0]);v.j=v.u([0,1,0]);v.k=v.u([0,0,1]);v.2J=l(n){9 a=[];J{a.19(F.2F())}H(--n);8 v.u(a)};v.1j=l(n){9 a=[];J{a.19(0)}H(--n);8 v.u(a)};l S(){}S.23={e:l(i,j){o(i<1||i>7.4.q||j<1||j>7.4[0].q){8 w}8 7.4[i-1][j-1]},33:l(i){o(i>7.4.q){8 w}8 v.u(7.4[i-1])},2E:l(j){o(j>7.4[0].q){8 w}9 a=[],n=7.4.q,k=n,i;J{i=k-n;a.19(7.4[i][j-1])}H(--n);8 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// zig.js main closure
(function(){
//-----------------------------------------------------------------------------
// Helper objects
//-----------------------------------------------------------------------------
function get_stack_rep() {
var out = [];
var seen = {};
var caller = arguments.callee.caller;
while (caller) {
var fingerprint = fn_body(caller);
if (fingerprint in seen) {
break; // bail at the first sign of recursion
}
seen[fingerprint] = true;
out.unshift(fingerprint);
caller = caller.caller;
}
return out;
}
function Events() {
var events = {};
var listeners = [];
function addEventListener(eventName, callback) {
eventName = "on" + eventName;
if (!events.hasOwnProperty(eventName)) {
events[eventName] = [];
}
events[eventName].push(callback);
return callback;
}
function removeEventListener(eventName, callback) {
eventName = "on" + eventName;
if (!events.hasOwnProperty(eventName)) return;
var i = events[eventName].indexOf(callback);
if (1 >= 0) events[eventName].splice(i,1);
}
function addListener(listener) {
listeners.push(listener);
return listener;
}
function removeListener(listener) {
if (undefined === listener) {
listeners = [];
return;
}
var i = listeners.indexOf(listener);
if (i>=0) listeners.splice(i,1);
}
function fireEvent(eventName, arg, specificListener) {
eventName = "on" + eventName;
// first listeners
listeners.forEach(function(listener) {
if (undefined !== specificListener && specificListener != listener) return;
if (listener.hasOwnProperty(eventName)) {
//try {
listener[eventName].call(listener, arg);
//} catch (e) { console.log("Error calling callback for " + eventName + ": " + e); }
}
});
// and then events
if (events.hasOwnProperty(eventName)) {
events[eventName].forEach(function(cb) {
if (undefined !== specificListener && specificListener != cb) return;
//try {
cb.call(null, arg);
//} catch (e) {
// console.log("Error calling callback for " + eventName + ": " + e);
// console.log(get_stack_rep());
//}
});
}
}
function eventify(obj) {
obj.addEventListener = addEventListener;
obj.removeEventListener = removeEventListener;
obj.addListener = function(listener) {
addListener(listener);
fireEvent('attach', obj, listener);
return listener;
}
obj.removeListener = function(listener) {
fireEvent('detach', obj, listener);
removeListener(listener);
}
return obj;
}
return {
addEventListener : addEventListener,
removeEventListener : removeEventListener,
addListener : addListener,
removeListener : removeListener,
fireEvent : fireEvent,
eventify : eventify,
}
}
function BoundingBox(size, center) {
if (undefined === center) {
center = [0,0,0];
}
if (undefined === size) {
size = [0,0,0];
}
var center = $V(center);
var size = $V(size);
var extents = size.multiply(0.5);
var min = center.subtract(extents);
var max = center.add(extents);
function contains(point) {
point = $V(point);
return (point.e(1) >= min.e(1) && point.e(1) <= max.e(1) &&
point.e(2) >= min.e(2) && point.e(2) <= max.e(2) &&
point.e(3) >= min.e(3) && point.e(3) <= max.e(3));
}
function recenter(newCenter) {
center = $V(newCenter);
min = center.subtract(extents);
max = center.add(extents);
}
function resize(newSize) {
size = $V(size);
extents = size.multiply(0.5);
min = center.subtract(extents);
max = center.add(extents);
}
function inspect() {
console.log({center: center, size: size, min : min, max : max});
}
return {
contains : contains,
resize : resize,
recenter : recenter,
inspect : inspect
}
}
function FpsCounter() {
var lastFrame;
var pub = {
markframe : markframe,
lastDelta : 0,
fps : 0,
}
function markframe(timestamp) {
timestamp = timestamp || (new Date()).getTime();
lastFrame = lastFrame || timestamp;
pub.lastDelta = ((timestamp - lastFrame) / 1000);
pub.fps = 1 / pub.lastDelta;
lastFrame = timestamp;
}
return pub;
}
function clamp(x, min, max) {
if (x < min) return min;
if (x > max) return max;
return x;
}
function vclamp(v, vmin, vmax) {
return [clamp(v[0], vmin[0], vmax[0]), clamp(v[1], vmin[1], vmax[1]), clamp(v[2], vmin[2], vmax[2])];
}
function lerp(from, to, amount) {
return from + ((to - from) * amount);
}
function vlerp(p1,p2,r) {
out = [];
for (i=0;i<p1.length;i++) {
out.push(p2[i]*r+p1[i]*(1-r));
}
return out;
}
function vscale(v1, v2) {
return [v1[0]*v2[0], v1[1]*v2[1], v1[2]*v2[2]];
}
// enum: zig.Joint
// List of Joint ID's
var Joint = {
Invalid : 0,
Head : 1,
Neck : 2,
Torso : 3,
Waist : 4,
LeftCollar : 5,
LeftShoulder : 6,
LeftElbow : 7,
LeftWrist : 8,
LeftHand : 9,
LeftFingertip : 10,
RightCollar : 11,
RightShoulder : 12,
RightElbow : 13,
RightWrist : 14,
RightHand : 15,
RightFingertip : 16,
LeftHip : 17,
LeftKnee : 18,
LeftAnkle : 19,
LeftFoot : 20,
RightHip : 21,
RightKnee : 22,
RightAnkle : 23,
RightFoot : 24,
};
// enum: zig.Orientation
// Possible orientations for oriented controls (<Fader>, for instance)
var Orientation = {
X : 0,
Y : 1,
Z : 2,
}
//-----------------------------------------------------------------------------
// class: SteadyDetector
// Detects steady
//
// event: steady
// Triggered when hand is steady. Triggered only once per steady
//
// event: unsteady
// Triggered when hand is unsteady. Triggered only once per unsteady.
//-----------------------------------------------------------------------------
function SteadyDetector(maxVariance) {
if (undefined === maxVariance) {
maxVariance = 50;
}
var frameCount = 15;
var pointBuffer = [];
var maxVariance = maxVariance;
var events = Events();
function sumMatrix(mat) {
var sum = 0;
elements = mat.elements
for(var i=0; i<elements.length; i++) {
for(var j=0; j<elements[i].length; j++) {
sum += elements[i][j];
}
}
return sum;
}
// Reference : Oliver K. Smith: Eigenvalues of a symmetric 3 × 3 matrix. Commun. ACM 4(4): 168 (1961)
// find the eigenvalues of a 3x3 symmetric matrix
function getEigenvalues(mat) {
var m = mat.trace() / 3;
var K = mat.subtract( Matrix.I(3).x(m)); // K = mat - I*tr(mat)
var q = K.determinant() / 2;
var tempForm = K.x(K);
var p = sumMatrix(tempForm) / 6;
// NB in Smith's paper he uses phi = (1/3)*arctan(sqrt(p*p*p - q*q)/q), which is equivalent to below:
var phi = (1/3)*Math.acos(q/Math.sqrt(p*p*p));
if (Math.abs(q) >= Math.abs(Math.sqrt(p*p*p))) {
phi = 0;
}
if (phi < 0) {
phi = phi + Math.PI/3;
}
var eig1 = m + 2*Math.sqrt(p)*Math.cos(phi);
var eig2 = m - Math.sqrt(p)*(Math.cos(phi) + Math.sqrt(3)*Math.sin(phi));
var eig3 = m - Math.sqrt(p)*(Math.cos(phi) - Math.sqrt(3)*Math.sin(phi));
return [eig1, eig2, eig3];
}
function getCofactorMatrix(mat) {
var dims = mat.dimensions();
var xSize = dims.cols;
var ySize = dims.rows;
var output = mat.map(function(x, i, j) { return mat.minor(i+1,j+1,xSize-1, ySize-1).determinant(); } );
return output;
}
function getStddevs(vectors) {
if (vectors.length == 0) { return []; }
var sum = Vector.Zero(vectors[0].dimensions());
for (var k=0; k<vectors.length; k++) {
sum = sum.add(vectors[k]);
}
var avg = sum.multiply(1/(vectors.length));
var covarianceMatrix = Matrix.Zero(avg.dimensions(), avg.dimensions());
for (var k=0; k<vectors.length; k++) {
var temp = vectors[k].subtract(avg);
covarianceMatrix = covarianceMatrix.map(function(x, i, j) { return x + temp.elements[i-1]*temp.elements[j-1]; } );
}
var values = getEigenvalues(covarianceMatrix);
for (var k=0; k<values.length; k++) {
values[k] = Math.sqrt(Math.abs(values[k]));
}
return values;
}
function clear() {
pointBuffer = [];
publicApi.isSteady = false;
}
// method: addPosition
// Add an external position [x,y,z] to the steady detector
//
// Arguments:
// position - the external position [x,y,z] to add
function addPosition(position) {
pointBuffer.push($V(position));
while (pointBuffer.length > frameCount) {
pointBuffer.shift();
}
pb = pointBuffer;
var steadyThisFrame = true;
var stdDevs = getStddevs(pointBuffer);
for (var k=0; k<stdDevs.length; k++) {
steadyThisFrame &= stdDevs[k] < publicApi.maxVariance;
}
if (steadyThisFrame && (!publicApi.isSteady)) {
publicApi.isSteady = true;
events.fireEvent('steady', publicApi);
events.fireEvent('steadychanged', publicApi);
} else if (!steadyThisFrame && publicApi.isSteady) {
publicApi.isSteady = false;
events.fireEvent('unsteady', publicApi);
events.fireEvent('steadychanged', publicApi);
}
}
function onsessionstart(focusPosition) {
clear();
}
function onsessionupdate(position) {
addPosition(position);
}
var publicApi = {
addPosition : addPosition,
// property: maxVariance
// Steady detector sensitivity
maxVariance : maxVariance,
onsessionstart : onsessionstart,
onsessionupdate : onsessionupdate,
// property: isSteady
// Is hand steady right now? *Read only*.
isSteady : false,
}
events.eventify(publicApi);
return publicApi;
}
//-----------------------------------------------------------------------------
// class: Fader
// Axis aligned fader. Can be oriented on x, y, or z. The fader can also be split up into logical items using <itemsCount>.
//
// event: valuechange
// Triggered whenever the fader value changes
//
// event: edge
// Triggered when the fader reaches an edge (value of 0 or 1). Will only trigger once per edge
//
// event: hoverstart
// Triggered when the hand is hovering over <Fader.hoverItem>
//
// event: hoverstop
// Triggered when the hand is not hovering over <Fader.hoverItem> any more
//-----------------------------------------------------------------------------
function Fader(orientation, size) {
// defaults
size = size || FADER_SIZE;//450;
// return object
var api = {
// property: itemsCount
// How many logical items on our Fader
itemsCount : 1,
// property: hysteresis
// Used by <Fader.hoverstart> and <Fader.hoverstop> events.
hysteresis : 0.1,
// property: initialValue
// Value of fader when hand is in the initial focus position of the UI session
initialValue : 0.5,
// property: flip
// Use this to flip the value of the fader
flip : false,
// property: value
// Current fader value. Useful for visualizing the fader
value : 0,
// property: hoverItem
// Logical hovered item. -1 if not in session
hoverItem : -1,
// property: driftAmount
// If larger than 0, the fader will drift towards current hand point until fader <value> is <initialValue>
driftAmount : 0,
// property: autoMoveToContain
// If true, the fader will always move to contain current hand point
autoMoveToContain : false,
// property: size
// Physical size of fader, in millimeters
size : size,
// property: orientation
// Which <zig.Orientation> is this fader aligned to?
orientation : orientation,
updatePosition : updatePosition,
updateValue : updateValue,
moveTo : moveTo,
moveToContain : moveToContain,
onsessionstart : onsessionstart,
onsessionupdate : onsessionupdate,
onsessionend : onsessionend,
}
var events = Events();
events.eventify(api);
var isEdge = false;
var center = [0,0,0];
var fps = FpsCounter();
// hand point control callbacks
function onsessionstart(focusPosition) {
moveTo(focusPosition, api.initialValue);
api.value = api.initialValue;
api.hoverItem = Math.floor(api.itemsCount * api.value);
events.fireEvent('hoverstart', api);
}
function onsessionupdate(position) {
updatePosition(position);
}
function onsessionend() {
events.fireEvent('hoverstop', api);
api.hoverItem = -1;
}
// method: updatePosition
// Manually update a fader with external positions
//
// Arguments:
// position - external position [x,y,z]
function updatePosition(position) {
fps.markframe();
if (api.autoMoveToContain) {
moveToContain(position);
}
var distanceFromCenter = position[api.orientation] - center[api.orientation];
var ret = (distanceFromCenter / api.size) + 0.5;
ret = clamp(ret, 0, 1);
if (api.flip) ret = 1 - ret;
updateValue(ret);
if (api.driftAmount != 0) {
var delta = api.initialValue - api.value;
moveTo(position, api.value + (delta * 0.05));//api.driftAmount * fps.lastDelta));
}
}
// method: updateValue
// Manually update the fader with external values
//
// Arguments:
// value - normalized (0-1) external value
function updateValue(value) {
var newSelected = api.hoverItem;
var minValue = (api.hoverItem * (1 / api.itemsCount)) - api.hysteresis;
var maxValue = (api.hoverItem + 1) * (1 / api.itemsCount) + api.hysteresis;
api.value = value;
events.fireEvent('valuechange', api);
var isThisFrameEdge = (value == 0) || (value == 1);
if (!isEdge && isThisFrameEdge) {
events.fireEvent('edge', api);
}
isEdge = isThisFrameEdge;
if (api.value > maxValue) {
newSelected++;
}
if (api.value < minValue) {
newSelected--;
}
if (newSelected != api.hoverItem) {
events.fireEvent('hoverstop', api);
api.hoverItem = newSelected;
events.fireEvent('hoverstart', api);
}
}
// method: moveTo
// Move the fader so that when the hand is at given position, the <Fader.value> will be given value
//
// Arguments:
// position - position [x,y,z]
// value - target value for given position
function moveTo(position, value) {
if (api.flip) value = 1 - value;
center[api.orientation] = position[api.orientation] + ((0.5 - value) * api.size);
}
// method: moveToContain
// Move the fader to ensure that given position is within the fader bounds
//
// Arguments:
// position - position [x,y,z]
function moveToContain(position) {
var distanceFromCenter = position[api.orientation] - center[api.orientation];
if (distanceFromCenter > api.size / 2) {
center[api.orientation] += distanceFromCenter - (api.size / 2);
} else if (distanceFromCenter < api.size / -2) {
center[api.orientation] += distanceFromCenter + (api.size / 2);
}
}
return api;
}
// 3D fader
function Fader3D(size) {
var events = Events();
var api = {
size : size,
value : [0,0,0],
initialValue : [0.5, 0.5, 0.5],
onsessionstart : onsessionstart,
onsessionupdate : onsessionupdate,
onsessionend : function() {},
}
events.eventify(api);
var center = [0,0,0];
function onsessionstart(focusPosition) {
moveTo(focusPosition, api.initialValue);
}
function onsessionupdate(position) {
var d = $V(position).subtract($V(center)).elements;
var val = [clamp((d[0]/api.size[0]) + 0.5, 0, 1),
clamp((d[1]/api.size[1]) + 0.5, 0, 1),
clamp((d[2]/api.size[2]) + 0.5, 0, 1)];
updateValue(val);
}
function updateValue(value) {
api.value = value;
events.fireEvent('valuechange', api);
}
function moveTo(position, value) {
//var delta = vscale($V([0.5,0.5,0.5]).subtract($V(value)).elements, api.size);
//center = position.add($V(delta)).elements;
center[0] = position[0] + ((0.5 - value[0]) * api.size[0]);
center[1] = position[1] + ((0.5 - value[1]) * api.size[1]);
center[2] = position[2] + ((0.5 - value[2]) * api.size[2]);
}
return api;
}
// 2D fader
function Fader2D(width, height) {
width = width || 600;
height = height || 450;
var events = Events();
var api = {
width : width,
height : height,
value : [0,0],
onsessionstart : onsessionstart,
onsessionupdate : onsessionupdate,
onsessionend : onsessionend,
}
events.eventify(api);
var fader3d = Fader3D([width, height, 1]);
fader3d.addEventListener('valuechange', function(f) {
api.value[0] = f.value[0];
api.value[1] = f.value[1];
events.fireEvent('valuechange', api);
});
function onsessionstart(focusPosition) {
fader3d.onsessionstart(focusPosition);
}
function onsessionupdate(position) {
fader3d.size[0] = api.width;
fader3d.size[1] = api.height;
fader3d.onsessionupdate(position);
}
function onsessionend() {
fader3d.onsessionend();
}
return api;
}
//-----------------------------------------------------------------------------
// class: PushDetector
// Detects push gestures
//
// event: push
// Push
//
// event: release
// Release
//
// event: click
// Click
//-----------------------------------------------------------------------------
function PushDetector(size) {
size = size || 70;
var api = {
// property: isPushed
// push state, true when pushed. *read only*
isPushed : false,
// property: pushProgress
// Normalized push progress, useful for push visualization on a cursor
pushProgress : 0,
// property: pushTime
// Timestamp of last push
pushTime : 0,
// property: driftAmount
// How fast should the push detector drift after the hand point
driftAmount : 15,
onsessionstart: onsessionstart,
onsessionupdate: onsessionupdate,
onsessionend : onsessionend,
}
var events = Events();
events.eventify(api);
var fader = Fader(Orientation.Z, size);
fader.flip = true; // positive Z is backwards by default, so flip it
fader.initialValue = 0.2;
fader.autoMoveToContain = true;
fader.driftAmount = api.driftSpeed; // mm/s
function onsessionstart(focusPosition) {
fader.onsessionstart(focusPosition);
}
function onsessionupdate(position) {
fader.moveToContain(position);
fader.onsessionupdate(position);
api.pushProgress = fader.value;
if (!api.isPushed) {
if (1.0 == api.pushProgress) {
api.isPushed = true;
api.pushTime = (new Date()).getTime();
api.pushPosition = position;
fader.driftAmount = 0; // stop drifting when pushed
events.fireEvent('push', api);
}
} else {
if (api.pushProgress < 0.5) {
api.isPushed = false;
fader.driftAmount = api.driftAmount;
if (isClick()) {
events.fireEvent('click', api);
}
events.fireEvent('release', api);
}
}
}
function onsessionend() {
fader.onsessionend();
if (api.isPushed) {
api.isPushed = false;
events.fireEvent('release', api);
}
}
function isClick() {
var delta = (new Date()).getTime() - api.pushTime;
return (delta < 1000);
}
return api;
}
//-----------------------------------------------------------------------------
// class: SwipeDetector
// Detects swipes
//
// event: swipeup
// Swipe up
//
// event: swipedown
// Swipe down
//
// event: swipeleft
// Swipe left
//
// event: swiperight
// Swipe right
//
// event: swipe
// Triggered every swipe with direction argument. Direction will be one of 'up', 'down', 'left', or 'right'.
//
// event: swiperelease
// Triggered after a swipe is 'released', when the hand moves back towards the initial position
//-----------------------------------------------------------------------------
function SwipeDetector() {
var events = Events();
var horizontalFader = Fader(Orientation.X);
var verticalFader = Fader(Orientation.Y);
var api = {
// property: driftAmount
// How fast should the swipe detector follow the hand point
driftAmount : 20,
// property: horizontalFader
// Internal <Fader> used to detect horizontal swipes. *Read only*.
horizontalFader : horizontalFader,
// property: verticalFader
// Internal <Fader> used to detect vertical swipes. *Read only*.
verticalFader : verticalFader,
// property: isSwiped
// True when the swipe detector is 'swiped', between one of the swipe* events and the <swiperelease> event
isSwiped : false,
onattach : onattach,
ondetach : ondetach,
onedge : onedge,
onvaluechange : onvaluechange,
}
events.eventify(api);
horizontalFader.autoMoveToContain = true;
verticalFader.autoMoveToContain = true;
horizontalFader.driftAmount = api.driftAmount;
verticalFader.driftAmount = api.driftAmount;
horizontalFader.swipeDirections = ['left','right'];
verticalFader.swipeDirections = ['down','up'];
horizontalFader.addListener(api);
verticalFader.addListener(api);
function onedge(fader) {
var dir = fader.swipeDirections[fader.value];
events.fireEvent('swipe' + dir, api);
events.fireEvent('swipe', dir);
fader.driftAmount = 0;
fader.swipeValue = fader.value;
}
function onvaluechange(fader) {
if (undefined !== fader.swipeValue) {
if (Math.abs(fader.swipeValue - fader.value) >= 0.5) {
delete fader.swipeValue;
fader.driftAmount = api.driftAmount;
events.fireEvent('swiperelease', api);
}
}
}
function onattach(target) {
target.addListener(horizontalFader);
target.addListener(verticalFader);
}
function ondetach(target) {
target.removeListener(horizontalFader);
target.removeListener(verticalFader);
}
return api;
}
//-----------------------------------------------------------------------------
// class: Cursor
// Basic cursor, implemented using <Fader2D> and <PushDetector>
//
// event: push
// Push
//
// event: release
// Release
//
// event: click
// Click
//-----------------------------------------------------------------------------
function Cursor() {
var fader2d = Fader2D();
var pushDetector = PushDetector();
var events = Events();
var api = {
onattach : onattach,
ondetach : ondetach,
pushDetector : pushDetector,
fader2d : fader2d,
value : [0,0],
x : 0,
y : 0,
}
events.eventify(api);
fader2d.addEventListener('valuechange', function(f) {
api.value[0] = api.x = f.value[0];
api.value[1] = api.y = 1 - f.value[1];
events.fireEvent('move', api);
});
pushDetector.addEventListener('push', function(pd) {
events.fireEvent('push', api);
});
pushDetector.addEventListener('release', function(pd) {
events.fireEvent('release', api);
});
pushDetector.addEventListener('click', function(pd) {
events.fireEvent('click', api);
});
function onattach(target) {
target.addListener(fader2d);
target.addListener(pushDetector);
}
function ondetach(target) {
target.removeListener(fader2d);
target.removeListener(pushDetector);
}
return api;
}
//-----------------------------------------------------------------------------
// class: WaveDetector
// Detects wave gestures
//
// event: wave
// Triggered when a wave gesture is detected
//-----------------------------------------------------------------------------
function WaveDetector() {
var fader = Fader(Orientation.X, 100);
fader.autoMoveToContain = true;
fader.driftAmount = 15;
var api = {
onattach : onattach,
ondetach : ondetach,
// property: fader
// The <Fader> used internally by the wave detector
fader : fader,
// property: numberOfWaves
// How many waves before we trigger the <wave> event
numberOfWaves : 5,
}
var events = Events();
events.eventify(api);
var edgebuffer = []
var lastEdge = -1;
fader.addEventListener('edge', function(f) {
var now = (new Date()).getTime();
while ((edgebuffer.length > 0) && (now - edgebuffer[0] > 2000)) edgebuffer.shift();
if (edgebuffer.length == 0) lastEdge = -1;
if (lastEdge != f.value) edgebuffer.push(now);
lastEdge = f.value;
if (edgebuffer.length >= api.numberOfWaves) {
events.fireEvent('wave', api);
edgebuffer=[];
}
});
function onattach(target) {
target.addListener(fader);
}
function ondetach(target) {
target.removeListener(fader);
}
return api;
}
//-----------------------------------------------------------------------------
// class: HandSessionDetector
// Manages the lifetime of hand point based sessions.
//
// event: sessionstart(focusPosition)
// Triggered when a hand session is started, with the initial focus position as an argument
//
// event: sessionupdate(position)
// Triggered every frame during a session with current hand position
//
// event: sessionend
// Triggered when the session ends. This can happen if tracked hand is lowered, or if the tracked user leaves the scene
//-----------------------------------------------------------------------------
function HandSessionDetector() {
var events = Events();
var api = {
// property: shouldRotateHand
// Attempt to normalize hand positions to sensor center. Makes implementing UI controls a bit easier if we can assume the user is always facing the sensor, even when this isn't the case
shouldRotateHand : true,
// property: shouldSmoothPoints
// Should hand points be smoothed
shouldSmoothPoints : true,
onuserupdate : onuserupdate,
onattach : onattach,
ondetach : ondetach,
startSession : startSession,
stopSession : stopSession,
// property: startOnWave
// Should a hand session start when user waves?
startOnWave : true,
// property: startOnSteady
// Should a hand session start on hand steady?
startOnSteady : true,
}
events.eventify(api);
var bboxOffset = $V([0, 250, -300]);
var bbox = BoundingBox([1000, 500, 500]);
var rotateReference;
var inSession = false;
var jointToUse;
var framesNotInBbox = 0;
var maxFramesNotInBbox = 15;
var lastPosition = [0,0,0];
var currentUser;