public void Evaluate(int SpreadMax)
{
if (!bEnable[0])
{
return;
}
// Get the current state of our contacts.
// Nice, this seems to be a threadsafe read.
ReadOnlyContactCollection contacts = contactTarget.GetState();
IDout.SliceCount = contactSize.SliceCount = contactRotation.SliceCount
= contactCoord.SliceCount = contacts.Count;
int i = 0;
foreach (Contact c in contacts)
{
IDout[i] = c.Id;
Vector2D pos = new Vector2D(c.X, c.Y);
pos.x = (bNormalizeValues[0]) ? pos.x / 512 - 1 : pos.x;
pos.y = (bNormalizeValues[0]) ? (2 - pos.y / 384) - 1 : pos.y;
double rotation = 1 - c.Orientation / (2 * Math.PI);
contactSize[i] = new Vector2D(c.Bounds.Width / 1024.0,
c.Bounds.Height / 768.0);
contactCoord[i] = pos;
contactRotation[i] = rotation;
i++;
}
}
/// <summary>
/// Allows the app to run logic such as updating the world,
/// checking for collisions, gathering input and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
if (isApplicationActivated || isApplicationPreviewed)
{
if (isApplicationActivated)
{
ProcessContacts(gameTime, contactTarget.GetState());
}
DoUpdate(gameTime, isApplicationActivated);
}
base.Update(gameTime);
}
/// <summary>
/// Initializes the surface input system. This should be called after any window
/// initialization is done, and should only be called once.
/// </summary>
public override void Initialize()
{
surfaceComp = Game.Components.OfType<SurfaceComponent>().First();
System.Diagnostics.Debug.Assert(Game.Window.Handle != System.IntPtr.Zero,
"Window initialization must be complete before InitializeSurfaceInput is called");
if (Game.Window.Handle == System.IntPtr.Zero)
return;
System.Diagnostics.Debug.Assert(contactTarget == null,
"Surface input already initialized");
if (contactTarget != null)
return;
// Create a target for surface input.
contactTarget = new ContactTarget(Game.Window.Handle, EventThreadChoice.OnBackgroundThread);
contactTarget.EnableInput();
contactTarget.EnableImage(ImageType.Normalized);
contactTarget.FrameReceived += new EventHandler<FrameReceivedEventArgs>(contactTarget_FrameReceived);
CurrentContacts = contactTarget.GetState();
manipulationProcessor = new Affine2DManipulationProcessor(Affine2DManipulations.TranslateX | Affine2DManipulations.TranslateY
| Affine2DManipulations.Rotate | Affine2DManipulations.Scale);
manipulationProcessor.Affine2DManipulationDelta += new EventHandler<Affine2DOperationDeltaEventArgs>(manipulationDelta);
manipulationProcessor.Affine2DManipulationStarted += (s, e) => IsManipulating = true;
manipulationProcessor.Affine2DManipulationCompleted += (s, e) => IsManipulating = false;
base.Initialize();
}
public void Frame()
{
if (openCOVER != null)
{
// Want to identify all the contacts added or removed since the last update.
List <Contact> addedContacts = new List <Contact>();
List <Contact> removedContacts = new List <Contact>();
List <Contact> changedContacts = new List <Contact>();
// Get a list of the current contacts
ReadOnlyContactCollection currentContacts = contactTarget.GetState();
// Compare the contacts in the current list to the list saved from the last update
if (previousContacts != null)
{
foreach (Contact contact in previousContacts)
{
Contact c = null;
currentContacts.TryGetContactFromId(contact.Id, out c);
if (c == null)
{
removedContacts.Add(contact);
if (contact.IsFingerRecognized)
{
removedManipulators.Add(new Manipulator(contact.Id, contact.CenterX, contact.CenterY));
}
}
}
foreach (Contact contact in currentContacts)
{
Contact c = null;
previousContacts.TryGetContactFromId(contact.Id, out c);
if (c != null)
{
changedContacts.Add(contact);
if (contact.IsFingerRecognized)
{
currentManipulators.Add(new Manipulator(contact.Id, contact.CenterX, contact.CenterY));
}
}
else
{
addedContacts.Add(contact);
if (contact.IsFingerRecognized)
{
currentManipulators.Add(new Manipulator(contact.Id, contact.CenterX, contact.CenterY));
}
}
}
}
else
{
foreach (Contact c in currentContacts)
{
addedContacts.Add(c);
if (c.IsFingerRecognized)
{
currentManipulators.Add(new Manipulator(c.Id, c.CenterX, c.CenterY));
}
}
}
manipulationProcessor.ProcessManipulators(currentManipulators, removedManipulators);
currentManipulators.Clear();
removedManipulators.Clear();
previousContacts = currentContacts;
// Hit test and assign all new contacts
foreach (Contact c in addedContacts)
{
openCOVER.addedContact(c);
}
// Update the captors of all the pre-existing contacts
foreach (Contact c in changedContacts)
{
openCOVER.changedContact(c);
}
// Clean up all old contacts
foreach (Contact co in removedContacts)
{
openCOVER.removedContact(co);
}
openCOVER.frame();
}
}
