public void MoveFrameBackwards(GestureFrame f)
{
if (f == null)
{
return;
}
Gesture g = (Gesture)TheWorkspace.DataContext;
if (g == null)
{
return;
}
int fIndex = g.Frames.IndexOf(f);
if (fIndex == 0)
{
g.Frames.Move(fIndex, g.Frames.Count - 1);
}
else
{
g.Frames.Move(fIndex, fIndex - 1);
}
SyncEditorGrids();
}
/// <summary>
/// Gets the normalized gesture data.
/// </summary>
/// <returns>
/// The normalized gesture data.
/// </returns>
/// <param name='resolution'>
/// Resolution to normalize to.
/// </param>
public GestureData getNormalizedGestureData(float resolution)
{
var dx = (this.maximumX - this.minimumX) * 1.0f;
var dy = (this.maximumY - this.minimumY) * 1.0f;
if (dx > dy)
{
dy = dx;
}
else
{
dx = dy;
}
GestureData normalizedData = new GestureData();
for (var i = 0; i < this.frames.Count; i++)
{
GestureFrame frame = (GestureFrame)this.frames[i];
float x = (frame.position.x * 1.0f - this.minimumX) / dx * resolution;
float y = resolution - (frame.position.y * 1.0f - this.minimumY) / dy * resolution;
GestureFrame normalizedFrame = new GestureFrame(new Vector(x, y, 0.0f), frame.velocity, frame.timestamp);
normalizedData.appendFrame(normalizedFrame);
}
return(normalizedData);
}
public void DeleteFrame(GestureFrame f)
{
if (f == null)
{
return;
}
Gesture g = (Gesture)TheWorkspace.DataContext;
if (g == null)
{
return;
}
g.Frames.Remove(f);
if (g.Frames.Count == 0)
{
g.Frames.Add(MakeNewGestureFrame()); // Do not let a gesture have 0 frames //TODO: having 0-framed gestures could be useful for creating named libraries of keyboard shortcuts as templates (say one library for PowerPoint, one for Media Player etc.) to which a user can then fill-in the gesture frames (would need the Visualizer to be aware of that and also maybe show the respective gestures colored as red - to signify they're not yet complete)
}
if (FramesListBox.SelectedItem == null)
{
FramesListBox.SelectedIndex = FramesListBox.Items.Count - 1;
}
SyncEditorGrids();
}
public void appendFrame(GestureFrame frame)
{
if (frame.position.x < this.minimumX)
{
this.minimumX = frame.position.x;
}
if (frame.position.y < this.minimumY)
{
this.minimumY = frame.position.y;
}
if (frame.position.z < this.minimumZ)
{
this.minimumZ = frame.position.z;
}
if (frame.position.x > this.maximumX)
{
this.maximumX = frame.position.x;
}
if (frame.position.y > this.maximumY)
{
this.maximumY = frame.position.y;
}
if (frame.position.z > this.maximumZ)
{
this.maximumZ = frame.position.z;
}
this.frames.Add(frame);
}
private Gesture DeepCopyGesture(Gesture source)
{
Gesture target = new Gesture();
target = new Gesture();
target.Name = source.Name;
target.Command = new ObservableCollection <Key>(source.Command);
target.Hold = source.Hold; // Motherfucking System.Boolean is cocksucking value type
target.Joint = source.Joint; // Enums are also value type
target.Frames = new ObservableCollection <GestureFrame>();
foreach (GestureFrame sourceFrame in source.Frames)
{
GestureFrame targetFrame = new GestureFrame();
for (int i = 0; i < 400; i++)
{
targetFrame.FrontCells[i] = new GestureFrameCell()
{
IndexInFrame = sourceFrame.FrontCells[i].IndexInFrame,
IsHotspot = sourceFrame.FrontCells[i].IsHotspot
};
targetFrame.SideCells[i] = new GestureFrameCell()
{
IndexInFrame = sourceFrame.SideCells[i].IndexInFrame,
IsHotspot = sourceFrame.SideCells[i].IsHotspot
};
}
target.Frames.Add(targetFrame);
}
return(target);
}
// Get the position of a gesture in the first previous frame that has it
private void GetPrevalentPositionInPreviousFrame(GestureFrame prevalent)
{
// Loop through previous frames
int prev = GetPreviousFrame();
while (prev != currentFrame)
{
// Check if this previous frame has a true positive
if (frames[prev].isPrevalentCalculated)
{
// Check if this true positive is the same than the one we are looking for
if (frames[prev].prevalent.type == prevalent.type)
{
// The gesture is updated. The position in the only value overwritten, the rest is the same
prevalent = frames[prev].prevalent;
return;
}
}
prev--;
if (prev < 0)
{
prev = nFrames - 1;
}
}
}
/// <summary>
/// Enable/disable rows on SideViewGrid according to selection on FrontViewGrid
/// </summary>
private void SyncEditorGrids_FrontToSide()
{
GestureFrame sf = (GestureFrame)FramesListBox.SelectedItem;
GestureFrameCell[] fcs = (GestureFrameCell[])FVGrid.ItemsSource;
GestureFrameCell[] scs = (GestureFrameCell[])SVGrid.ItemsSource;
// 'If' overcomes FVGrid_SelectionChanged firing before everything else and syncing SVGrid to a different Frame's FVGrid
if (Object.ReferenceEquals(sf.FrontCells, fcs) && Object.ReferenceEquals(sf.SideCells, scs))
{
IList frontViewGrid_selectedCells = (IList)FVGrid.SelectedItems;
List <int> frontViewGrid_selectedRows = new List <int>();
foreach (GestureFrameCell c in frontViewGrid_selectedCells)
{
frontViewGrid_selectedRows.Add((int)(c.IndexInFrame / 20));
}
for (int i = 0; i < 400; i++)
{
ListBoxItem sideViewGridItemContainer = (ListBoxItem)SVGrid.ItemContainerGenerator.ContainerFromIndex(i);
if (frontViewGrid_selectedRows.Contains((int)(i / 20)))
{
sideViewGridItemContainer.IsEnabled = true;
}
else
{
sideViewGridItemContainer.IsEnabled = false;
GestureFrame f = (GestureFrame)SVGrid.DataContext;
f.SideCells[i].IsHotspot = false;
}
}
}
}
private void DeleteFrameButton_Click(object sender, RoutedEventArgs e) //reused at each frame
{
Button b = (Button)sender; //find the button clicked
GestureFrame s = (GestureFrame)b.DataContext; //find the corresponding frame
DeleteFrame(s);
}
public void appendFrame(GestureFrame frame)
{
if (frame.position.x < this.minimumX) {
this.minimumX = frame.position.x;
}
if (frame.position.y < this.minimumY) {
this.minimumY = frame.position.y;
}
if (frame.position.z < this.minimumZ) {
this.minimumZ = frame.position.z;
}
if (frame.position.x > this.maximumX) {
this.maximumX = frame.position.x;
}
if (frame.position.y > this.maximumY) {
this.maximumY = frame.position.y;
}
if (frame.position.z > this.maximumZ) {
this.maximumZ = frame.position.z;
}
this.frames.Add(frame);
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
base.TouchesBegan(touches, evt);
try
{
UITouch[] arr = evt.AllTouches.ToArray <UITouch>();
if (arr.Length == 2)
{
_resize = Math.Sqrt(Math.Abs(arr[0].LocationInView(this).X - arr[1].LocationInView(this).X) * Math.Abs(arr[0].LocationInView(this).X - arr[1].LocationInView(this).X) + Math.Abs(arr[0].LocationInView(this).Y - arr[1].LocationInView(this).Y) * Math.Abs(arr[0].LocationInView(this).Y - arr[1].LocationInView(this).Y));
// _resizeReady = true;
ignore_action = false;
}
UITouch touch = touches.AnyObject as UITouch;
if (touch != null)
{
_touchesX = touch.LocationInView(this).X;
_touchesY = touch.LocationInView(this).Y;
GestureFrame _gi = (GestureFrame)this.Element;
EventArgs e = new EventArgs();
_gi.OnDown(this, e, (float)_touchesX, (float)_touchesY, (int)touch.TapCount);
}
}
catch (Exception ex)
{
}
}
// Remove the information of the frame. Remember that it is a circular buffer. It recycles frames
public void Clear()
{
gestures.Clear();
gesturesCounters.Clear();
prevalent = new GestureFrame();
isPrevalentCalculated = false;
}
// Add a gesture to the list of detectred
public void AddGesture(GestureFrame gesture)
{
gestures.Add(gesture);
// Update the counter of gestures. Increases the gesture counter by 1
UpdateCounters(gesture.type, 1);
}
public override void TouchesMoved(NSSet touches, UIEvent evt)
{
base.TouchesMoved(touches, evt);
try
{
GestureFrame _gi = (GestureFrame)this.Element;
double rs = DetectResizeMotion(evt.AllTouches.ToArray <UITouch>());
if (-1 != rs)
{
EventArgs e = new EventArgs();
_gi.OnResize(this, e, _resize, rs);
}
else if (!ignore_action)
{
UITouch touch = touches.AnyObject as UITouch;
if (touch != null)
{
nfloat offsetX = _touchesX - touch.LocationInView(touch.View).X;
nfloat offsetY = _touchesY - touch.LocationInView(touch.View).Y;
float scale = (float)UIScreen.MainScreen.Scale;
EventArgs e = new EventArgs();
_gi.OnMove(this, e, (float)(offsetX) / scale, (float)(offsetY) / scale);
}
}
}
catch (Exception ex)
{
}
}
private void MoveFrameForwardButton_Click(object sender, RoutedEventArgs e) //reused at each frame
{
Button b = (Button)sender; //find the button clicked
GestureFrame f = (GestureFrame)b.DataContext; //find the corresponding frame
MoveFrameForward(f);
}
// For debugging
void OnGUI()
{
GestureFrame currentGesture = phoneCamera.GetCurrentGesture();
Vector4 xywhScreenCoord = phoneCamera.CamCoordinatesToScreenCoordinates(currentGesture.x, currentGesture.y, currentGesture.width, currentGesture.height);
GUILayout.BeginArea(new Rect(500, 20, 250, 120));
GUILayout.Label(message);
GUILayout.EndArea();
}
// Get a list of detected gestures from the list retrieved from OpenCV
// This function just converts the list of detected gestures retrieved from OpenCV to the format that we can use in Unity
public static List <GestureFrame> GetList(GestureType type, CvDetectedGesture[] gestures, int n)
{
List <GestureFrame> list = new List <GestureFrame>();
for (int i = 0; i < n; i++)
{
GestureFrame g = new GestureFrame(type, gestures[i]);
list.Add(g);
}
return(list);
}
public void Evaluate(int SpreadMax)
{
if (this.FInvalidateConnect)
{
if (runtime != null)
{
this.runtime.SkeletonFrameReady -= SkeletonReady;
}
if (this.FInRuntime.IsConnected)
{
//Cache runtime node
this.runtime = this.FInRuntime[0];
if (runtime != null)
{
this.FInRuntime[0].SkeletonFrameReady += SkeletonReady;
}
}
this.FInvalidateConnect = false;
}
if (this.FInvalidate)
{
lock (m_lock)
{
this.FOutId.SliceCount = this.LastGestures.Count;
this.FOutType.SliceCount = this.LastGestures.Count;
int cnt = 0;
foreach (int k in this.LastGestures.Keys)
{
this.FOutId[cnt] = k;
GestureFrame gf = this.LastGestures[k];
this.FOutType[cnt] = gf.Gesture;
this.FOutNew[cnt] = gf.IsNew;
gf.IsNew = false;
cnt++;
}
}
this.FInvalidate = false;
}
}
private void MoveFrameBackwardButton_Click(object sender, RoutedEventArgs e)
{
Button b = (Button)sender;
GestureFrame f = (GestureFrame)b.DataContext;
Gesture g = (Gesture)TheWorkspace.DataContext;
int fIndex = g.Frames.IndexOf(f);
if (fIndex == 0)
{
g.Frames.Move(fIndex, g.Frames.Count - 1);
}
else
{
g.Frames.Move(fIndex, fIndex - 1);
}
SyncEditorGrids();
}
private void DeleteFrameButton_Click(object sender, RoutedEventArgs e)
{
Button b = (Button)sender;
GestureFrame s = (GestureFrame)b.DataContext;
Gesture g = (Gesture)TheWorkspace.DataContext;
g.Frames.Remove(s);
if (g.Frames.Count == 0)
{
g.Frames.Add(MakeNewGestureFrame()); // Do not let a gesture have 0 frames
}
if (FramesListBox.SelectedItem == null)
{
FramesListBox.SelectedIndex = FramesListBox.Items.Count - 1;
}
SyncEditorGrids();
}
private GestureFrame MakeNewGestureFrame()
{
GestureFrame newFrame = new GestureFrame();
for (int i = 0; i < 400; i++)
{
newFrame.FrontCells[i] = new GestureFrameCell()
{
IndexInFrame = i, IsHotspot = false
};
newFrame.SideCells[i] = new GestureFrameCell()
{
IndexInFrame = i, IsHotspot = false
};
}
return(newFrame);
}
private GestureFrame DeepCopyGestureFrame(GestureFrame sourceFrame)
{
GestureFrame targetFrame = new GestureFrame();
for (int i = 0; i < 400; i++)
{
targetFrame.FrontCells[i] = new GestureFrameCell()
{
IndexInFrame = sourceFrame.FrontCells[i].IndexInFrame,
IsHotspot = sourceFrame.FrontCells[i].IsHotspot
};
targetFrame.SideCells[i] = new GestureFrameCell()
{
IndexInFrame = sourceFrame.SideCells[i].IndexInFrame,
IsHotspot = sourceFrame.SideCells[i].IsHotspot
};
}
return(targetFrame);
}
public void LoadGestureCollection(object parameter)
{
// Conjure file explorer
OpenFileDialog openDialog = new OpenFileDialog();
// F*****g around with file formats
openDialog.Filter = "Hotspotizer Gesture files (*.hsjson)|*.hsjson";
// Read and load if dialog returns OK
if (openDialog.ShowDialog() == true)
{
string json = File.ReadAllText(openDialog.FileName);
// DeserializeObject() does not appear to correctly deserialize Gesture objects
// Below is a kinda-dirty solution around that
List <Gesture> sourceList = JsonConvert.DeserializeObject <List <Gesture> >(json);
while (GestureCollection.Count > 0)
{
GestureCollection.RemoveAt(0);
}
foreach (Gesture sourceGesture in sourceList)
{
Gesture targetGesture = new Gesture();
targetGesture.Name = sourceGesture.Name;
targetGesture.Command = new ObservableCollection <Key>(sourceGesture.Command);
targetGesture.Hold = sourceGesture.Hold;
targetGesture.Joint = sourceGesture.Joint;
while (targetGesture.Frames.Count > 0)
{
targetGesture.Frames.RemoveAt(0);
}
foreach (GestureFrame sourceFrame in sourceGesture.Frames)
{
GestureFrame targetFrame = new GestureFrame();
for (int i = 0; i < 400; i++)
{
targetFrame.FrontCells[i] = sourceFrame.FrontCells[i];
targetFrame.SideCells[i] = sourceFrame.SideCells[i];
}
targetGesture.Frames.Add(targetFrame);
}
GestureCollection.Add(targetGesture);
}
}
}
public void LoadGestureCollection(string filename)
{
string json = File.ReadAllText(filename);
// DeserializeObject() does not appear to correctly deserialize Gesture objects
// Below is a kinda-dirty solution around that
List <Gesture> sourceList = JsonConvert.DeserializeObject <List <Gesture> >(json);
GestureCollection.Clear();
foreach (Gesture sourceGesture in sourceList)
{
RemoveNoneKeys(sourceGesture.Command); //Seems somewhere at the serialization or deserialization Key.None creeps in, so remove it
//copy sourceGesture to targetGesture //TODO: check why this copying is needed
Gesture targetGesture = new Gesture()
{
Name = sourceGesture.Name,
Command = new ObservableCollection <Key>(sourceGesture.Command),
Hold = sourceGesture.Hold,
Joint = sourceGesture.Joint
};
//copy the frames too (note: this is not the same as DeepCopyGestureFrame)
foreach (GestureFrame sourceFrame in sourceGesture.Frames)
{
GestureFrame targetFrame = new GestureFrame();
for (int i = 0; i < 400; i++)
{
targetFrame.FrontCells[i] = sourceFrame.FrontCells[i];
targetFrame.SideCells[i] = sourceFrame.SideCells[i];
}
targetGesture.Frames.Add(targetFrame);
}
GestureCollection.Add(targetGesture);
if (GestureCollectionLoaded != null)
{
GestureCollectionLoaded(this, EventArgs.Empty);
}
}
}
private void OnGestureRecognized(object sender, GestureEventArgs e)
{
lock (m_lock)
{
GestureFrame gf = new GestureFrame();
gf.Gesture = e.GestureType;
gf.IsNew = true;
this.LastGestures[e.TrackingId] = gf;
}
/*switch (e.GestureType)
* {
* case GestureType.Menu:
* Gesture = "Menu";
* break;
* case GestureType.WaveRight:
* Gesture = "Wave Right";
* break;
* case GestureType.WaveLeft:
* Gesture = "Wave Left";
* break;
* case GestureType.JoinedHands:
* Gesture = "Joined Hands";
* break;
* case GestureType.SwipeLeft:
* Gesture = "Swipe Left";
* break;
* case GestureType.SwipeRight:
* Gesture = "Swipe Right";
* break;
* case GestureType.ZoomIn:
* Gesture = "Zoom In";
* break;
* case GestureType.ZoomOut:
* Gesture = "Zoom Out";
* break;
*
* default:
* break;
* }*/
}
// Get the most detected gesture in the previous frames. The most detected gesture is then nominated as the true positive of
// the current frame because there is a high probability that it is still the same gesture
public GestureFrame GetPrevalentGestureInPreviousFrames()
{
GestureFrame prevalent = new GestureFrame();
// If the buffer has 1 frame then there are no previous frames
if (nFrames == 1)
{
return(prevalent);
}
// Create a counter for all the gestures in the format (name, n)
Dictionary <GestureType, int> counter = new Dictionary <GestureType, int>();
// Loop through all the previous frames
int prev = GetPreviousFrame();
while (prev != currentFrame)
{
// Check if this previous frame has a true positive
if (frames[prev].isPrevalentCalculated && frames[prev].prevalent.type != GestureType.NONE)
{
// Check if the counter does not have the true positive of this previous frame
if (!counter.ContainsKey(frames[prev].prevalent.type))
{
// If the counter does not exist then it is created and initialized with 1
counter.Add(frames[prev].prevalent.type, 1);
}
else
{
// If the counter exists the it is increased
counter[frames[prev].prevalent.type] += 1;
}
}
// Get the next previous frame
prev--;
if (prev < 0)
{
prev = nFrames - 1;
}
}
// Check if the counter is empty. This means that the previous frames did not detect anything. Returns an empty object
if (counter.Count == 0)
{
return(prevalent);
}
// Get the most detected gesture in all the previous frames (the counter that has more number)
var max = counter.OrderByDescending(entry => entry.Value).FirstOrDefault();
if (!max.Equals(new KeyValuePair <GestureType, int>())) // Check if it found anything
{
// At this point max.Key has the most detected gesture among all the previous frames
prevalent.type = max.Key;
// Get the position of the most detected gesture. This is necessary because the previous steps only found the NAME of the gesture,
// not the position
GetPrevalentPositionInPreviousFrame(prevalent);
}
return(prevalent);
}
/// <summary>
/// Detects the movement and builds the frame list when movement is detected.
/// </summary>
/// <param name='frame'>
/// Leap frame.
/// </param>
public void DetectMovement(Frame frame)
{
GestureFrame gestureFrame = new GestureFrame(frame.Pointables[0].TipPosition, frame.Pointables[0].TipVelocity, frame.Timestamp);
this.detectionHeap.Add(gestureFrame);
Vector3 acceleration = Vector3.zero;
Vector3 delta = Vector3.zero;
Vector3 movementWork = Vector3.zero;
Vector3 kinecticEnergy = Vector3.zero;
float movementTotalWork;
float kinecticEnergyTotal;
if (this.detectionHeap.Count > this.maximumHeapSize) {
this.detectionHeap.RemoveAt(0);
GestureFrame firstFrame = (GestureFrame)this.detectionHeap[0];
GestureFrame lastFrame = (GestureFrame)this.detectionHeap[this.maximumHeapSize - 1];
float deltaTime = lastFrame.timestamp - firstFrame.timestamp;
acceleration.x = (lastFrame.velocity.x - firstFrame.velocity.x) / deltaTime;
acceleration.y = (lastFrame.velocity.y - firstFrame.velocity.y) / deltaTime;
acceleration.z = (lastFrame.velocity.z - firstFrame.velocity.z) / deltaTime;
this.movementDirection.x = acceleration.x > 0 ? 1 : -1;
this.movementDirection.y = acceleration.y > 0 ? 1 : -1;
this.movementDirection.z = acceleration.z > 0 ? 1 : -1;
delta.x = (lastFrame.position.x - firstFrame.position.x);
delta.y = (lastFrame.position.y - firstFrame.position.y);
delta.z = (lastFrame.position.z - firstFrame.position.z);
/*
* http://en.wikipedia.org/wiki/Work_(physics)
* Work calculation, using the acceleration previously calculated as the force to move the finger from one point to another
*/
movementWork.x = delta.x * acceleration.x;
movementWork.y = delta.y * acceleration.y;
movementWork.z = delta.z * acceleration.z;
/*
* http://en.wikipedia.org/wiki/Kinetic_energy
* Measures the pointable kinectic energy to detect when gesture have ended.
*/
kinecticEnergy.x = Mathf.Pow(lastFrame.velocity.x, 2) * 0.5f * 1.0e-6f;
kinecticEnergy.y = Mathf.Pow(lastFrame.velocity.y, 2) * 0.5f * 1.0e-6f;
kinecticEnergy.z = Mathf.Pow(lastFrame.velocity.z, 2) * 0.5f * 1.0e-6f;
kinecticEnergyTotal = kinecticEnergy.x + kinecticEnergy.y;
if (Mathf.Abs(movementWork.x) > this.minimumRelevantWorkThreshold) {
this.movementTotalWork.x += movementWork.x;
}
if (Mathf.Abs(movementWork.y) > this.minimumRelevantWorkThreshold) {
this.movementTotalWork.y += movementWork.y;
}
if (Mathf.Abs(movementWork.z) > this.minimumRelevantWorkThreshold) {
this.movementTotalWork.z += movementWork.z;
}
if (!this.performingMovement && lastFrame.timestamp - this.lastStoppedTime > 50000.0f) {
this.movementTotalWork.x = 0.0f;
this.movementTotalWork.y = 0.0f;
this.movementTotalWork.z = 0.0f;
this.lastStoppedTime = lastFrame.timestamp;
}
movementTotalWork = this.movementTotalWork.x + this.movementTotalWork.y;
if (movementTotalWork > this.minimumStartMovementTotalWork && !this.performingMovement) {
this.movementTotalWork.x = 0;
this.movementTotalWork.y = 0;
this.movementTotalWork.z = 0;
this.performingMovement = true;
if (!this.performingGesture) {
this.performingGesture = true;
this.gestureData = new GestureData();
if (this.callbackInstance != null)
{
this.callbackInstance.beginOfGestureCallback();
}
}
} else if (this.performingMovement && kinecticEnergyTotal < this.minimumEndMovementKinectEnergy) {
this.movementTotalWork.x = 0.0f;
this.movementTotalWork.y = 0.0f;
this.movementTotalWork.z = 0.0f;
this.performingMovement = false;
this.lastStoppedTime = this.lastEndMovementTime = lastFrame.timestamp;
}
if (this.performingGesture) {
this.gestureData.appendFrame(gestureFrame);
}
float timeSinceEndMovement = lastFrame.timestamp - this.lastEndMovementTime;
if (!this.performingMovement && this.performingGesture && timeSinceEndMovement > 500000) {
if (this.callbackInstance != null) {
this.callbackInstance.endOfGestureCallback(this.gestureData);
}
this.performingGesture = false;
}
}
}
// Set the true positive of the current frame
public void SetPrevalentInCurrentFrame(GestureFrame prevalent)
{
frames[currentFrame].SetPrevalentGesture(prevalent);
}
private void HandleOnTap(object sender, EventArgs e)
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnTap();
}
void HandleOnSwipeDown(object sender, EventArgs e)
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeDown();
}
/// <summary>
/// Gets the normalized gesture data.
/// </summary>
/// <returns>
/// The normalized gesture data.
/// </returns>
/// <param name='resolution'>
/// Resolution to normalize to.
/// </param>
public GestureData getNormalizedGestureData(float resolution)
{
var dx = (this.maximumX - this.minimumX) * 1.0f;
var dy = (this.maximumY - this.minimumY) * 1.0f;
if (dx > dy)
dy = dx;
else
dx = dy;
GestureData normalizedData = new GestureData();
for (var i = 0; i < this.frames.Count; i++) {
GestureFrame frame = (GestureFrame)this.frames[i];
float x = (frame.position.x * 1.0f - this.minimumX) / dx * resolution;
float y = resolution - (frame.position.y * 1.0f - this.minimumY) / dy * resolution;
GestureFrame normalizedFrame = new GestureFrame(new Vector(x, y, 0.0f), frame.velocity, frame.timestamp);
normalizedData.appendFrame(normalizedFrame);
}
return normalizedData;
}
protected override void OnElementChanged(ElementChangedEventArgs <Frame> e)
{
base.OnElementChanged(e);
swipeDown = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeDown();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Down,
};
swipeUp = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeTop();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Up,
};
swipeLeft = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeLeft();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Left,
};
swipeRight = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeRight();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Right,
};
if (e.NewElement == null)
{
if (swipeDown != null)
{
this.RemoveGestureRecognizer(swipeDown);
}
if (swipeUp != null)
{
this.RemoveGestureRecognizer(swipeUp);
}
if (swipeLeft != null)
{
this.RemoveGestureRecognizer(swipeLeft);
}
if (swipeRight != null)
{
this.RemoveGestureRecognizer(swipeRight);
}
}
if (e.OldElement == null)
{
this.AddGestureRecognizer(swipeDown);
this.AddGestureRecognizer(swipeUp);
this.AddGestureRecognizer(swipeLeft);
this.AddGestureRecognizer(swipeRight);
}
}
/// <summary>
/// End of gesture movement callback.
/// </summary>
/// <param name='data'>
/// Data of the gesture gathered.
/// </param>
public void endOfGestureCallback(GestureData data)
{
GestureUtils.EnumGestures gResult;
Debug.Log("Gesture ended!");
List <Vector2> pointList = new List <Vector2>();
GestureData normalizedData = data.getNormalizedGestureData(CANVAS_SIZE);
GestureFrame previousFrame = (GestureFrame)normalizedData.frames[0];
pointList.Add(new Vector2(previousFrame.position.x, previousFrame.position.y));
for (int i = 1; i < normalizedData.frames.Count; i++)
{
GestureFrame currentFrame = (GestureFrame)normalizedData.frames[i];
if ((Math.Abs(currentFrame.position.x - previousFrame.position.x) < NORMAL_FRAME_VARIATION) &&
(Math.Abs(currentFrame.position.y - previousFrame.position.y) < NORMAL_FRAME_VARIATION))
{
pointList.Add(new Vector2(currentFrame.position.x, currentFrame.position.y));
previousFrame = currentFrame;
}
}
//At gesture end, draw the normalized data.
Vector2 previousPoint = pointList[0];
for (int i = 1; i < pointList.Count; i++)
{
Vector2 currentPoint = pointList[i];
DrawLine(canvas, previousPoint.x, previousPoint.y, currentPoint.x, currentPoint.y, Color.black);
previousPoint = currentPoint;
}
canvas.Apply();
//The checker method only receives canvas if you want the points used drawn on the screen,
//can just receive a points list otherwise.
gResult = gu.GestureChecker(pointList, canvas, CANVAS_SIZE);
switch (gResult)
{
case GestureUtils.EnumGestures.DownZigZag:
Debug.Log("Downwards Zig Zag!");
status = "Downwards Zig Zag!";
break;
case GestureUtils.EnumGestures.RightZigZag:
Debug.Log("Rightwards Zig Zag!");
status = "Rightwards Zig Zag!";
break;
case GestureUtils.EnumGestures.Square:
Debug.Log("Square!");
status = "Square!";
break;
default:
Debug.Log("No Gesture found.");
status = "Nothing.";
break;
}
}
private void OnGestureRecognized(object sender, GestureEventArgs e)
{
lock (m_lock)
{
GestureFrame gf = new GestureFrame();
gf.Gesture = e.GestureType;
gf.IsNew = true;
this.LastGestures[e.TrackingId] = gf;
}
/*switch (e.GestureType)
{
case GestureType.Menu:
Gesture = "Menu";
break;
case GestureType.WaveRight:
Gesture = "Wave Right";
break;
case GestureType.WaveLeft:
Gesture = "Wave Left";
break;
case GestureType.JoinedHands:
Gesture = "Joined Hands";
break;
case GestureType.SwipeLeft:
Gesture = "Swipe Left";
break;
case GestureType.SwipeRight:
Gesture = "Swipe Right";
break;
case GestureType.ZoomIn:
Gesture = "Zoom In";
break;
case GestureType.ZoomOut:
Gesture = "Zoom Out";
break;
default:
break;
}*/
}
/// <summary>
/// Detects the movement and builds the frame list when movement is detected.
/// </summary>
/// <param name='frame'>
/// Leap frame.
/// </param>
public void DetectMovement(Frame frame)
{
GestureFrame gestureFrame = new GestureFrame(frame.Pointables[0].TipPosition, frame.Pointables[0].TipVelocity, frame.Timestamp);
this.detectionHeap.Add(gestureFrame);
Vector3 acceleration = Vector3.zero;
Vector3 delta = Vector3.zero;
Vector3 movementWork = Vector3.zero;
Vector3 kinecticEnergy = Vector3.zero;
float movementTotalWork;
float kinecticEnergyTotal;
if (this.detectionHeap.Count > this.maximumHeapSize)
{
this.detectionHeap.RemoveAt(0);
GestureFrame firstFrame = (GestureFrame)this.detectionHeap[0];
GestureFrame lastFrame = (GestureFrame)this.detectionHeap[this.maximumHeapSize - 1];
float deltaTime = lastFrame.timestamp - firstFrame.timestamp;
acceleration.x = (lastFrame.velocity.x - firstFrame.velocity.x) / deltaTime;
acceleration.y = (lastFrame.velocity.y - firstFrame.velocity.y) / deltaTime;
acceleration.z = (lastFrame.velocity.z - firstFrame.velocity.z) / deltaTime;
this.movementDirection.x = acceleration.x > 0 ? 1 : -1;
this.movementDirection.y = acceleration.y > 0 ? 1 : -1;
this.movementDirection.z = acceleration.z > 0 ? 1 : -1;
delta.x = (lastFrame.position.x - firstFrame.position.x);
delta.y = (lastFrame.position.y - firstFrame.position.y);
delta.z = (lastFrame.position.z - firstFrame.position.z);
/*
* http://en.wikipedia.org/wiki/Work_(physics)
* Work calculation, using the acceleration previously calculated as the force to move the finger from one point to another
*/
movementWork.x = delta.x * acceleration.x;
movementWork.y = delta.y * acceleration.y;
movementWork.z = delta.z * acceleration.z;
/*
* http://en.wikipedia.org/wiki/Kinetic_energy
* Measures the pointable kinectic energy to detect when gesture have ended.
*/
kinecticEnergy.x = Mathf.Pow(lastFrame.velocity.x, 2) * 0.5f * 1.0e-6f;
kinecticEnergy.y = Mathf.Pow(lastFrame.velocity.y, 2) * 0.5f * 1.0e-6f;
kinecticEnergy.z = Mathf.Pow(lastFrame.velocity.z, 2) * 0.5f * 1.0e-6f;
kinecticEnergyTotal = kinecticEnergy.x + kinecticEnergy.y;
if (Mathf.Abs(movementWork.x) > this.minimumRelevantWorkThreshold)
{
this.movementTotalWork.x += movementWork.x;
}
if (Mathf.Abs(movementWork.y) > this.minimumRelevantWorkThreshold)
{
this.movementTotalWork.y += movementWork.y;
}
if (Mathf.Abs(movementWork.z) > this.minimumRelevantWorkThreshold)
{
this.movementTotalWork.z += movementWork.z;
}
if (!this.performingMovement && lastFrame.timestamp - this.lastStoppedTime > 50000.0f)
{
this.movementTotalWork.x = 0.0f;
this.movementTotalWork.y = 0.0f;
this.movementTotalWork.z = 0.0f;
this.lastStoppedTime = lastFrame.timestamp;
}
movementTotalWork = this.movementTotalWork.x + this.movementTotalWork.y;
if (movementTotalWork > this.minimumStartMovementTotalWork && !this.performingMovement)
{
this.movementTotalWork.x = 0;
this.movementTotalWork.y = 0;
this.movementTotalWork.z = 0;
this.performingMovement = true;
if (!this.performingGesture)
{
this.performingGesture = true;
this.gestureData = new GestureData();
if (this.callbackInstance != null)
{
this.callbackInstance.beginOfGestureCallback();
}
}
}
else if (this.performingMovement && kinecticEnergyTotal < this.minimumEndMovementKinectEnergy)
{
this.movementTotalWork.x = 0.0f;
this.movementTotalWork.y = 0.0f;
this.movementTotalWork.z = 0.0f;
this.performingMovement = false;
this.lastStoppedTime = this.lastEndMovementTime = lastFrame.timestamp;
}
if (this.performingGesture)
{
this.gestureData.appendFrame(gestureFrame);
}
float timeSinceEndMovement = lastFrame.timestamp - this.lastEndMovementTime;
if (!this.performingMovement && this.performingGesture && timeSinceEndMovement > 500000)
{
if (this.callbackInstance != null)
{
this.callbackInstance.endOfGestureCallback(this.gestureData);
}
this.performingGesture = false;
}
}
}
