void Quickstart::onFrame(const Leap::Controller &controller) {
// returns the most recent frame. older frames can be accessed by passing in
// a "history" parameter to retrieve an older frame, up to about 60
// (exact number subject to change)
const Leap::Frame frame = controller.frame();
// do nothing unless hands are detected
if (frame.hands().empty())
return;
// first detected hand
const Leap::Hand firstHand = frame.hands()[0];
// first pointable object (finger or tool)
const Leap::PointableList pointables = firstHand.pointables();
if (pointables.empty()) return;
const Leap::Pointable firstPointable = pointables[0];
// print velocity on the X axis
cout << "Pointable X velocity: " << firstPointable.tipVelocity()[0] << endl;
const Leap::FingerList fingers = firstHand.fingers();
if (fingers.empty()) return;
for (int i = 0; i < fingers.count(); i++) {
const Leap::Finger finger = fingers[i];
std::cout << "Detected finger " << i << " at position (" <<
finger.tipPosition().x << ", " <<
finger.tipPosition().y << ", " <<
finger.tipPosition().z << ")" << std::endl;
}
}
void FubiLeapSensor::getFingerTrackingData(int handID, SkeletonHandJoint::Joint joint,
Fubi::SkeletonJointPosition& position, Fubi::SkeletonJointOrientation& orientation)
{
bool fingerFound = false;
if (m_currFrame.isValid())
{
const Leap::Hand& h = m_currFrame.hand(handID);
if (h.isValid())
{
Leap::Vector pos;
float roll, yaw, pitch;
if (joint == SkeletonHandJoint::PALM)
{
fingerFound = true;
pos = h.palmPosition();
roll = h.direction().roll();
yaw = h.direction().yaw();
pitch = h.direction().pitch();
}
else
{
int fingerIndex = joint - 1;
Leap::FingerList fingers = h.fingers();
if (fingerIndex < fingers.count())
{
const Leap::Finger& f = fingers[fingerIndex];
if (f.isValid())
{
fingerFound = true;
pos = f.tipPosition();
roll = f.direction().roll();
yaw = f.direction().yaw();
pitch = f.direction().pitch();
}
}
}
if (fingerFound)
{
position.m_confidence = h.confidence();
position.m_position.x = pos.x + m_offsetPos.x;
position.m_position.y = pos.y + m_offsetPos.y;
position.m_position.z = pos.z + m_offsetPos.z;
orientation.m_confidence = h.confidence();
orientation.m_orientation = Matrix3f::RotMat(pitch, -yaw, -(roll+Math::Pi));
}
}
}
if (!fingerFound)
{
// not found so reset the confidence
position.m_confidence = 0;
orientation.m_confidence = 0;
}
}
void LeapCinderVectorFieldApp::processFingers()
{
Leap::Frame frame = m_LeapController.frame();
Leap::FingerList fingers = frame.fingers();
m_VectorField->ClearPointTo();
for( int i = 0; i < fingers.count(); i++ )
{
m_VectorField->CheckPointTo( normalizeCoords( fingers[i].tipPosition() ) );
}
}
GestureFrame LMRecorder::prepareDataClone(const Leap::Frame frame, double timestamp)
{
GestureFrame outputFrame;
outputFrame.setTimestamp(timestamp);
Leap::HandList handsInFrame = frame.hands();
for(int handIndex=0; handIndex<handsInFrame.count(); handIndex++)
{
Leap::Hand currHand = handsInFrame[handIndex];
//create GestureHand
GestureHand gestureHand(
currHand.id(),
Vertex(currHand.palmPosition().x, currHand.palmPosition().y, currHand.palmPosition().z),
Vertex(0, 0, 0/*currHand.stabilizedPalmPosition().x, currHand.stabilizedPalmPosition().y, currHand.stabilizedPalmPosition().z*/),
Vertex(currHand.palmNormal().x, currHand.palmNormal().y, currHand.palmNormal().z),
Vertex(currHand.direction().x, currHand.direction().y, currHand.direction().z)
);
gestureHand.setOrderValue(currHand.palmPosition().x);
Vertex planeNormalVec = gestureHand.getDirection().crossProduct(gestureHand.getPalmNormal()).getNormalized();
Leap::FingerList fingersInCurrHand = currHand.fingers();
for (int fingerIndex=0; fingerIndex<fingersInCurrHand.count(); fingerIndex++)
{
Leap::Finger currFinger = fingersInCurrHand[fingerIndex];
Leap::Vector leapFingerTipPos = currFinger.tipPosition();
Vertex fingerTipPos(leapFingerTipPos.x, leapFingerTipPos.y, leapFingerTipPos.z);
float distance = getPointDistanceFromPlane(fingerTipPos, gestureHand.getPalmPosition(), planeNormalVec);
//create GestureFinger
GestureFinger gestureFinger(
currFinger.id(),
fingerTipPos,
Vertex(currFinger.stabilizedTipPosition().x, currFinger.stabilizedTipPosition().y, currFinger.stabilizedTipPosition(). z),
Vertex(currFinger.direction().x, currFinger.direction().y, currFinger.direction().z),
currFinger.length(),
currFinger.width()
);
gestureFinger.setOrderValue(distance);
gestureHand.addFinger(gestureFinger);
}
gestureHand.sortFingers();
outputFrame.addHand(gestureHand);
}
outputFrame.sortHands();
}
void MenuController::leapMenuClosed(const Leap::Controller& controller, const Leap::Frame& frame)
{
Leap::GestureList gestures = frame.gestures();
for (const Leap::Gesture& g : gestures) {
if (g.type() == Leap::Gesture::TYPE_CIRCLE) {
Leap::CircleGesture circle(g);
bool xyPlane = abs(circle.normal().dot(Leap::Vector(0, 0, 1))) > 0.8f;
if (circle.progress() > 1.0f && xyPlane && circle.radius() > 35.0f) {
Leap::Hand hand = circle.hands().frontmost();
Leap::FingerList fingers = hand.fingers();
if (fingers[1].isValid()) {
pointer_ = fingers[1];
} else if (fingers[2].isValid()) {
pointer_ = fingers[2];
}
bool main = pointer_.isValid() && fingers.extended().count() <= 2;
bool secondary = fingers[Leap::Finger::TYPE_INDEX].isExtended() &&
fingers[Leap::Finger::TYPE_THUMB].isExtended() &&
fingers[Leap::Finger::TYPE_MIDDLE].isExtended() && fingers.extended().count() == 3;
if (main) {
leap_state_ = LeapState::triggered_main;
} else if (secondary && MainController::getInstance().focusLayer() && MainController::getInstance().focusLayer()->contextMenu()) {
leap_state_ = LeapState::triggered_context;
}
}
}
}
}
void jester::LeapMotionImpl::processFingers(Leap::Hand hand, Bone::BoneId fingerOne, LeapHand whichHand) {
Leap::FingerList fingerList = hand.fingers();
std::vector<Leap::Finger> fingers;
FingerData *fingerIds = (whichHand == LeapHand::LEFT ? kLeftFingerIds : kRightFingerIds);
bool fingersFound[] = {false, false, false, false, false};
//project finger tip positions onto palm plane and calculate angle
for (Leap::FingerList::const_iterator fingerIter = fingerList.begin(); fingerIter != fingerList.end(); fingerIter++) {
fingers.push_back(*fingerIter);
}
//if this is the first time we've seen the full hand, calibrate the finger lengths
if (fingerIds[0].id == -1 && fingers.size() == 5) {
if (whichHand == LeapHand::LEFT)
std::sort(fingers.begin(), fingers.end(), left_hand_finger_x_coordinate_comparator);
else if (whichHand == LeapHand::RIGHT)
std::sort(fingers.begin(), fingers.end(), right_hand_finger_x_coordinate_comparator);
else
return;
fingersFound[0] = fingersFound[1] = fingersFound[2] = fingersFound[3] = fingersFound[4] = true;
for (int i = 0; i < 5; i++) {
fingerIds[i].id = fingers[i].id();
fingerIds[i].length = fingers[i].length();
}
} else if (fingerIds[0].id == -1)
return;
//search for all of the known finger ids
for (unsigned int i = 0; i < 5; i++) {
for (unsigned int j = 0; j < fingers.size(); j++) {
if (fingers[j].id() == fingerIds[i].id) {
fingersFound[i] = true;
setFingerInJointData(fingers[j], static_cast<Bone::BoneId>(fingerOne + i));
fingers.erase(fingers.begin() + j);
}
}
}
//match all unclaimed fingers based on closest size
for (unsigned int i = 0; i < fingers.size(); i++) {
float closestLengthDelta = FLT_MAX;
int closestFingerIx = -1;
for (int j = 0; j < 5; j++) {
if (!fingersFound[j]) {
float lengthDelta = abs(fingerIds[j].length - fingers[i].length());
if (lengthDelta < closestLengthDelta) {
closestLengthDelta = lengthDelta;
closestFingerIx = j;
}
}
}
if (closestFingerIx >= 0) {
fingersFound[closestFingerIx] = true;
fingerIds[closestFingerIx].id = fingers[i].id();
setFingerInJointData(fingers[i], static_cast<Bone::BoneId>(fingerOne + closestFingerIx));
}
}
}
//Main Event driven tick
void ULeapController::InterfaceEventTick(float DeltaTime)
{
//This is our tick event that is forwarded from the delegate, check validity
if (!_private->interfaceDelegate) return;
//Pointers
Leap::Frame frame = _private->leap.frame();
Leap::Frame pastFrame = _private->leap.frame(1);
//-Hands-
//Hand Count
int handCount = frame.hands().count();
if (_private->pastState.handCount != handCount)
{
ILeapEventInterface::Execute_HandCountChanged(_private->interfaceDelegate, handCount);
//Zero our input mapping orientations (akin to letting go of a joystick)
if (handCount == 0)
{
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmPitch, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmYaw, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmRoll, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmPitch, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmYaw, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmRoll, 0, 0, 0);
}
}
//Cycle through each hand
for (int i = 0; i < handCount; i++)
{
Leap::Hand hand = frame.hands()[i];
LeapHandStateData pastHandState = _private->pastState.stateForId(hand.id()); //we use a custom class to hold reliable state tracking based on id's
//Make a ULeapHand
if (_private->eventHand == NULL)
{
_private->eventHand = NewObject<ULeapHand>(this);
_private->eventHand->SetFlags(RF_RootSet);
}
_private->eventHand->setHand(hand);
//Emit hand
ILeapEventInterface::Execute_LeapHandMoved(_private->interfaceDelegate, _private->eventHand);
//Left/Right hand forwarding
if (hand.isRight())
{
ILeapEventInterface::Execute_LeapRightHandMoved(_private->interfaceDelegate, _private->eventHand);
//Input Mapping
FRotator palmOrientation = _private->eventHand->PalmOrientation;
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmPitch, palmOrientation.Pitch * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmYaw, palmOrientation.Yaw * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmRoll, palmOrientation.Roll * LEAP_IM_SCALE, 0, 0);
} else if (hand.isLeft())
{
ILeapEventInterface::Execute_LeapLeftHandMoved(_private->interfaceDelegate, _private->eventHand);
//Input Mapping
FRotator palmOrientation = _private->eventHand->PalmOrientation;
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmPitch, palmOrientation.Pitch * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmYaw, palmOrientation.Yaw * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmRoll, palmOrientation.Roll * LEAP_IM_SCALE, 0, 0);
}
//Grabbing
float grabStrength = hand.grabStrength();
bool grabbed = handClosed(grabStrength);
if (grabbed)
ILeapEventInterface::Execute_LeapHandGrabbing(_private->interfaceDelegate, grabStrength, _private->eventHand);
if (grabbed && !pastHandState.grabbed)
{
ILeapEventInterface::Execute_LeapHandGrabbed(_private->interfaceDelegate, grabStrength, _private->eventHand);
//input mapping
if (_private->eventHand->HandType == LeapHandType::HAND_LEFT)
EmitKeyDownEventForKey(EKeysLeap::LeapLeftGrab, 0, 0);
else
EmitKeyDownEventForKey(EKeysLeap::LeapRightGrab, 0, 0);
}else if (!grabbed && pastHandState.grabbed)
{
ILeapEventInterface::Execute_LeapHandReleased(_private->interfaceDelegate, grabStrength, _private->eventHand);
//input mapping
if (_private->eventHand->HandType == LeapHandType::HAND_LEFT)
EmitKeyUpEventForKey(EKeysLeap::LeapLeftGrab, 0, 0);
else
EmitKeyUpEventForKey(EKeysLeap::LeapRightGrab, 0, 0);
}
//Pinching
float pinchStrength = hand.pinchStrength();
bool pinched = handPinched(pinchStrength);
//While grabbing disable pinching detection, this helps to reduce spam as pose confidence plummets
if (grabbed) pinched = pastHandState.pinched;
else
{
if (pinched)
ILeapEventInterface::Execute_LeapHandPinching(_private->interfaceDelegate, pinchStrength, _private->eventHand);
if (pinched && !pastHandState.pinched)
{
ILeapEventInterface::Execute_LeapHandPinched(_private->interfaceDelegate, pinchStrength, _private->eventHand);
//input mapping
if (_private->eventHand->HandType == LeapHandType::HAND_LEFT)
EmitKeyDownEventForKey(EKeysLeap::LeapLeftPinch, 0, 0);
else
EmitKeyDownEventForKey(EKeysLeap::LeapRightPinch, 0, 0);
}
else if (!pinched && pastHandState.pinched)
{
ILeapEventInterface::Execute_LeapHandUnpinched(_private->interfaceDelegate, pinchStrength, _private->eventHand);
//input mapping
if (_private->eventHand->HandType == LeapHandType::HAND_LEFT)
EmitKeyUpEventForKey(EKeysLeap::LeapLeftPinch, 0, 0);
else
EmitKeyUpEventForKey(EKeysLeap::LeapRightPinch, 0, 0);
}
}
//-Fingers-
Leap::FingerList fingers = hand.fingers();
//Count
int fingerCount = fingers.count();
if ((pastHandState.fingerCount != fingerCount))
ILeapEventInterface::Execute_FingerCountChanged(_private->interfaceDelegate, fingerCount);
if (_private->eventFinger == NULL)
{
_private->eventFinger = NewObject<ULeapFinger>(this);
_private->eventFinger->SetFlags(RF_RootSet);
}
Leap::Finger finger;
//Cycle through each finger
for (int j = 0; j < fingerCount; j++)
{
finger = fingers[j];
_private->eventFinger->setFinger(finger);
//Finger Moved
if (finger.isValid())
ILeapEventInterface::Execute_LeapFingerMoved(_private->interfaceDelegate, _private->eventFinger);
}
//Do these last so we can easily override debug shapes
//Leftmost
finger = fingers.leftmost();
_private->eventFinger->setFinger(finger);
ILeapEventInterface::Execute_LeapLeftMostFingerMoved(_private->interfaceDelegate, _private->eventFinger);
//Rightmost
finger = fingers.rightmost();
_private->eventFinger->setFinger(finger);
ILeapEventInterface::Execute_LeapRightMostFingerMoved(_private->interfaceDelegate, _private->eventFinger);
//Frontmost
finger = fingers.frontmost();
_private->eventFinger->setFinger(finger);
ILeapEventInterface::Execute_LeapFrontMostFingerMoved(_private->interfaceDelegate, _private->eventFinger);
//touch only for front-most finger, most common use case
float touchDistance = finger.touchDistance();
if (touchDistance <= 0.f)
ILeapEventInterface::Execute_LeapFrontFingerTouch(_private->interfaceDelegate, _private->eventFinger);
//Set the state data for next cycle
pastHandState.grabbed = grabbed;
pastHandState.pinched = pinched;
pastHandState.fingerCount = fingerCount;
_private->pastState.setStateForId(pastHandState, hand.id());
}
_private->pastState.handCount = handCount;
//Gestures
for (int i = 0; i < frame.gestures().count(); i++)
{
Leap::Gesture gesture = frame.gestures()[i];
Leap::Gesture::Type type = gesture.type();
switch (type)
{
case Leap::Gesture::TYPE_CIRCLE:
if (_private->eventCircleGesture == NULL){
_private->eventCircleGesture = NewObject<ULeapCircleGesture>(this);
_private->eventCircleGesture->SetFlags(RF_RootSet);
}
_private->eventCircleGesture->setGesture(Leap::CircleGesture(gesture));
ILeapEventInterface::Execute_CircleGestureDetected(_private->interfaceDelegate, _private->eventCircleGesture);
_private->eventGesture = _private->eventCircleGesture;
break;
case Leap::Gesture::TYPE_KEY_TAP:
if (_private->eventKeyTapGesture == NULL)
{
_private->eventKeyTapGesture = NewObject<ULeapKeyTapGesture>(this);
_private->eventKeyTapGesture->SetFlags(RF_RootSet);
}
_private->eventKeyTapGesture->setGesture(Leap::KeyTapGesture(gesture));
ILeapEventInterface::Execute_KeyTapGestureDetected(_private->interfaceDelegate, _private->eventKeyTapGesture);
_private->eventGesture = _private->eventKeyTapGesture;
break;
case Leap::Gesture::TYPE_SCREEN_TAP:
if (_private->eventScreenTapGesture == NULL)
{
_private->eventScreenTapGesture = NewObject<ULeapScreenTapGesture>(this);
_private->eventScreenTapGesture->SetFlags(RF_RootSet);
}
_private->eventScreenTapGesture->setGesture(Leap::ScreenTapGesture(gesture));
ILeapEventInterface::Execute_ScreenTapGestureDetected(_private->interfaceDelegate, _private->eventScreenTapGesture);
_private->eventGesture = _private->eventScreenTapGesture;
break;
case Leap::Gesture::TYPE_SWIPE:
if (_private->eventSwipeGesture == NULL)
{
_private->eventSwipeGesture = NewObject<ULeapSwipeGesture>(this);
_private->eventSwipeGesture->SetFlags(RF_RootSet);
}
_private->eventSwipeGesture->setGesture(Leap::SwipeGesture(gesture));
ILeapEventInterface::Execute_SwipeGestureDetected(_private->interfaceDelegate, _private->eventSwipeGesture);
_private->eventGesture = _private->eventSwipeGesture;
break;
default:
break;
}
//emit gesture
if (type != Leap::Gesture::TYPE_INVALID)
{
ILeapEventInterface::Execute_GestureDetected(_private->interfaceDelegate, _private->eventGesture);
}
}
//Image
if (_private->allowImages && _private->imageEventsEnabled)
{
int imageCount = frame.images().count();
for (int i = 0; i < imageCount; i++)
{
Leap::Image image = frame.images()[i];
//Loop modification - Only emit 0 and 1, use two different pointers so we can get different images
if (i == 0)
{
if (_private->eventImage1 == NULL)
{
_private->eventImage1 = NewObject<ULeapImage>(this);
_private->eventImage1->SetFlags(RF_RootSet);
}
_private->eventImage1->setLeapImage(image);
ILeapEventInterface::Execute_RawImageReceived(_private->interfaceDelegate, _private->eventImage1->Texture(), _private->eventImage1);
}
else if (i == 1)
{
if (_private->eventImage2 == NULL)
{
_private->eventImage2 = NewObject<ULeapImage>(this);
_private->eventImage2->SetFlags(RF_RootSet);
}
_private->eventImage2->setLeapImage(image);
ILeapEventInterface::Execute_RawImageReceived(_private->interfaceDelegate, _private->eventImage2->Texture(), _private->eventImage2);
}
}
}
}
//--------------------------------------------------------------
void testApp::update(){
Leap::Vector pNormal;
Leap::Frame frame = leapController.frame();
Leap::HandList hands = frame.hands();
Leap::Vector pt0;
Leap::Vector pt1;
if (!hands.isEmpty()) {
fingerPos.clear();
sphereSize.clear();
sphereNorm.clear();
spherePos.clear();
//ofLogNotice("hand detected");
//----------------------------------- data collection -------------------------------------------------------------
for (int i = 0; i<hands.count(); i++) {
if (i>1) break;
Leap::Hand tempHand = hands[i];
Leap::FingerList tempfinger = tempHand.fingers();
for (int j = 0; j <= tempfinger.count(); j++) {
ofVec3f pt;
Leap::Finger finger = hands[i].fingers()[j];
Leap::Vector tempPT=finger.tipPosition();
pt.x=tempPT.x;pt.y=tempPT.y;pt.z=tempPT.z;
fingerPos.push_back(pt);
}
pt0 = tempHand.palmNormal();
Leap::Vector center = tempHand.sphereCenter();
ofVec3f sp; sp.x = center.x; sp.y = center.y; sp.z = center.z;
float r = tempHand.sphereRadius();
spherePos.push_back(sp);
sphereSize.push_back(r);
sphereNorm.push_back(pt0);
ofLogNotice("hand " +ofToString(i) + "normal", ofToString(pt0.x) + " " + ofToString(pt0.y) + " " + ofToString(pt0.z));
ofLogNotice("hand " + ofToString(i) + "center ", ofToString(sp.x) + " " + ofToString(sp.y) + " " + ofToString(sp.z));
}
//---------------------------------- state machine ------------------------------------------------------------------
if(phase1==true && phase2 == false && phase3==false && phase4 == false && phase5==false && phase6 == false && phase7 == false && (!fingerPos.empty()))
{
phase2 = true;
state = 1;
}
if (phase2 == true && (sphereNorm.size()>=2)) {
pt0 = sphereNorm[0];
pt1 = sphereNorm[1];
if (abs(abs(pt0.x)-abs(pt1.x))<0.04 && abs(abs(pt0.y)-abs(pt1.y))<0.04) {
phase3 = true;
phase2 = false;
}
}
}
// ofLogNotice("phase1: ", ofToString(phase1));
// ofLogNotice("phase2: ", ofToString(phase2));
// ofLogNotice("phase3: ", ofToString(phase3));
// ofLogNotice("phase4: ", ofToString(phase4));
// ofLogNotice("phase5: ", ofToString(phase5));
// ofLogNotice("phase6: ", ofToString(phase6));
// ofLogNotice("phase7: ", ofToString(phase7));
oldFrame = frame;
preId = frame.id();
}
void FLeapMotionInputDevice::ParseEvents()
{
//Optimization: If we don't have any delegates, skip
if (EventDelegates.Num() == 0)
{
return;
}
//Pointers
Leap::Frame Frame = ControllerData.LeapController.frame();
Leap::Frame PastFrame = ControllerData.LeapController.frame(1);
//Calculate HMD Timewarp if valid
if (GEngine->HMDDevice.IsValid() && ControllerData.bTimeWarpEnabled) {
LeapHMDSnapshot ThenSnapshot = HMDSamples->HMDSampleClosestToTimestamp(Frame.timestamp());
LeapHMDSnapshot NowSnapShot = HMDSamples->CurrentHMDSample();
LeapHMDSnapshot HistorySnapshot = HMDSamples->LastHMDSample(); //reduce jitter
//ControllerData.TimeWarpSnapshot = NowSnapShot.Difference(ThenSnapshot, ControllerData.TimeWarpFactor);// * ControllerData.TimeWarpFactor;
FQuat WarpQuat = NowSnapShot.Orientation;//FQuat::Slerp(NowSnapShot.Orientation, HistorySnapshot.Orientation, ControllerData.TimeWarpTween);
FQuat ThenTweened = FQuat::Slerp(ThenSnapshot.Orientation, HistorySnapshot.Orientation, ControllerData.TimeWarpTween);
ControllerData.TimeWarpSnapshot.Orientation = (WarpQuat.Inverse() * ControllerData.TimeWarpFactor) * ThenTweened;
ControllerData.TimeWarpAmountMs = (ControllerData.TimeWarpSnapshot.Timestamp) / 1000.f;
}
//-Hands-
//Hand Count
int HandCount = Frame.hands().count();
if (PastState->HandCount != HandCount)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_HandCountChanged(EventDelegate, HandCount);
});
//Zero our input mapping orientations (akin to letting go of a joystick)
if (HandCount == 0)
{
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmPitch, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmYaw, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmRoll, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmPitch, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmYaw, 0, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmRoll, 0, 0, 0);
}
}
//Cycle through each hand
for (int i = 0; i < HandCount; i++)
{
Leap::Hand Hand = Frame.hands()[i];
LeapHandStateData PastHandState = PastState->StateForId(Hand.id()); //we use a custom class to hold reliable state tracking based on id's
//Make a ULeapHand
if (PEventHand == nullptr)
{
PEventHand = NewObject<ULeapHand>();
PEventHand->AddToRoot();
}
PEventHand->SetHand(Hand);
//Emit hand
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandMoved(EventDelegate, PEventHand);
});
//Left/Right hand forwarding
if (Hand.isRight())
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapRightHandMoved(EventDelegate, PEventHand);
});
//Input Mapping
FRotator PalmOrientation = PEventHand->PalmOrientation;
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmPitch, PalmOrientation.Pitch * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmYaw, PalmOrientation.Yaw * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapRightPalmRoll, PalmOrientation.Roll * LEAP_IM_SCALE, 0, 0);
}
else if (Hand.isLeft())
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapLeftHandMoved(EventDelegate, PEventHand);
});
//Input Mapping
FRotator PalmOrientation = PEventHand->PalmOrientation;
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmPitch, PalmOrientation.Pitch * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmYaw, PalmOrientation.Yaw * LEAP_IM_SCALE, 0, 0);
EmitAnalogInputEventForKey(EKeysLeap::LeapLeftPalmRoll, PalmOrientation.Roll * LEAP_IM_SCALE, 0, 0);
}
//Grabbing
float GrabStrength = Hand.grabStrength();
bool Grabbed = HandClosed(GrabStrength);
if (Grabbed)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandGrabbing(EventDelegate, GrabStrength, PEventHand);
});
}
if (Grabbed && !PastHandState.Grabbed)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandGrabbed(EventDelegate, GrabStrength, PEventHand);
});
//input mapping
if (PEventHand->HandType == LeapHandType::HAND_LEFT)
{
EmitKeyDownEventForKey(EKeysLeap::LeapLeftGrab, 0, 0);
}
else
{
EmitKeyDownEventForKey(EKeysLeap::LeapRightGrab, 0, 0);
}
}
else if (!Grabbed && PastHandState.Grabbed)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandReleased(EventDelegate, GrabStrength, PEventHand);
});
//input mapping
if (PEventHand->HandType == LeapHandType::HAND_LEFT)
{
EmitKeyUpEventForKey(EKeysLeap::LeapLeftGrab, 0, 0);
}
else
{
EmitKeyUpEventForKey(EKeysLeap::LeapRightGrab, 0, 0);
}
}
//Pinching
float PinchStrength = Hand.pinchStrength();
bool Pinched = HandPinched(PinchStrength);
//While grabbing disable pinching detection, this helps to reduce spam as pose confidence plummets
if (Grabbed)
{
Pinched = PastHandState.Pinched;
}
else
{
if (Pinched)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandPinching(EventDelegate, PinchStrength, PEventHand);
});
}
if (Pinched && !PastHandState.Pinched)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandPinched(EventDelegate, PinchStrength, PEventHand);
});
//input mapping
if (PEventHand->HandType == LeapHandType::HAND_LEFT)
{
EmitKeyDownEventForKey(EKeysLeap::LeapLeftPinch, 0, 0);
}
else
{
EmitKeyDownEventForKey(EKeysLeap::LeapRightPinch, 0, 0);
}
}
else if (!Pinched && PastHandState.Pinched)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapHandUnpinched(EventDelegate, PinchStrength, PEventHand);
});
//input mapping
if (PEventHand->HandType == LeapHandType::HAND_LEFT)
{
EmitKeyUpEventForKey(EKeysLeap::LeapLeftPinch, 0, 0);
}
else
{
EmitKeyUpEventForKey(EKeysLeap::LeapRightPinch, 0, 0);
}
}
}
//-Fingers-
Leap::FingerList Fingers = Hand.fingers();
//Count
int FingerCount = Fingers.count();
if ((PastHandState.FingerCount != FingerCount))
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_FingerCountChanged(EventDelegate, FingerCount);
});
}
if (PEventFinger == nullptr)
{
PEventFinger = NewObject<ULeapFinger>();
PEventFinger->AddToRoot();
}
Leap::Finger Finger;
//Cycle through each finger
for (int j = 0; j < FingerCount; j++)
{
Finger = Fingers[j];
PEventFinger->SetFinger(Finger);
//Finger Moved
if (Finger.isValid())
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapFingerMoved(EventDelegate, PEventFinger);
});
}
}
//Do these last so we can easily override debug shapes
//Leftmost
Finger = Fingers.leftmost();
PEventFinger->SetFinger(Finger);
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapLeftMostFingerMoved(EventDelegate, PEventFinger);
});
//Rightmost
Finger = Fingers.rightmost();
PEventFinger->SetFinger(Finger);
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapRightMostFingerMoved(EventDelegate, PEventFinger);
});
//Frontmost
Finger = Fingers.frontmost();
PEventFinger->SetFinger(Finger);
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapFrontMostFingerMoved(EventDelegate, PEventFinger);
});
//touch only for front-most finger, most common use case
float touchDistance = Finger.touchDistance();
if (touchDistance <= 0.f)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_LeapFrontFingerTouch(EventDelegate, PEventFinger);
});
}
//Set the state data for next cycle
PastHandState.Grabbed = Grabbed;
PastHandState.Pinched = Pinched;
PastHandState.FingerCount = FingerCount;
PastState->SetStateForId(PastHandState, Hand.id());
}
PastState->HandCount = HandCount;
//Gestures
for (int i = 0; i < Frame.gestures().count(); i++)
{
Leap::Gesture Gesture = Frame.gestures()[i];
Leap::Gesture::Type Type = Gesture.type();
switch (Type)
{
case Leap::Gesture::TYPE_CIRCLE:
if (PEventCircleGesture == nullptr)
{
PEventCircleGesture = NewObject<ULeapCircleGesture>();
PEventCircleGesture->AddToRoot();
}
PEventCircleGesture->SetGesture(Leap::CircleGesture(Gesture));
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_CircleGestureDetected(EventDelegate, PEventCircleGesture);
});
PEventGesture = PEventCircleGesture;
break;
case Leap::Gesture::TYPE_KEY_TAP:
if (PEventKeyTapGesture == nullptr)
{
PEventKeyTapGesture = NewObject<ULeapKeyTapGesture>();
PEventKeyTapGesture->AddToRoot();
}
PEventKeyTapGesture->SetGesture(Leap::KeyTapGesture(Gesture));
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_KeyTapGestureDetected(EventDelegate, PEventKeyTapGesture);
});
PEventGesture = PEventKeyTapGesture;
break;
case Leap::Gesture::TYPE_SCREEN_TAP:
if (PEventScreenTapGesture == nullptr)
{
PEventScreenTapGesture = NewObject<ULeapScreenTapGesture>();
PEventScreenTapGesture->AddToRoot();
}
PEventScreenTapGesture->SetGesture(Leap::ScreenTapGesture(Gesture));
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_ScreenTapGestureDetected(EventDelegate, PEventScreenTapGesture);
});
PEventGesture = PEventScreenTapGesture;
break;
case Leap::Gesture::TYPE_SWIPE:
if (PEventSwipeGesture == nullptr)
{
PEventSwipeGesture = NewObject<ULeapSwipeGesture>();
PEventSwipeGesture->AddToRoot();
}
PEventSwipeGesture->SetGesture(Leap::SwipeGesture(Gesture));
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_SwipeGestureDetected(EventDelegate, PEventSwipeGesture);
});
PEventGesture = PEventSwipeGesture;
break;
default:
break;
}
//emit gesture
if (Type != Leap::Gesture::TYPE_INVALID)
{
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_GestureDetected(EventDelegate, PEventGesture);
});
}
}
//Image
if (ControllerData.bAllowImageEvents && ControllerData.bImageEventsEnabled)
{
int ImageCount = Frame.images().count();
//We only support getting both images
if (ImageCount >= 2)
{
Leap::Image Image1 = Frame.images()[0];
if (PEventImage1 == nullptr)
{
PEventImage1 = NewObject<ULeapImage>();
PEventImage1->AddToRoot();
}
PEventImage1->UseGammaCorrection = ControllerData.bUseGammaCorrection;
PEventImage1->SetLeapImage(Image1);
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_RawImageReceived(EventDelegate, PEventImage1->Texture(), PEventImage1);
});
Leap::Image Image2 = Frame.images()[1];
if (PEventImage2 == nullptr)
{
PEventImage2 = NewObject<ULeapImage>();
PEventImage2->AddToRoot();
}
PEventImage2->UseGammaCorrection = ControllerData.bUseGammaCorrection;
PEventImage2->SetLeapImage(Image2);
CallFunctionOnDelegates([&](UObject* EventDelegate)
{
ILeapEventInterface::Execute_RawImageReceived(EventDelegate, PEventImage2->Texture(), PEventImage2);
});
}
}
}
void SampleListener::onFrame(const Leap::Controller& controller) {
// Get the most recent frame and report some basic information
const Leap::Frame frame = controller.frame();
std::cout << "Frame id: " << frame.id()
<< ", timestamp: " << frame.timestamp()
<< ", hands: " << frame.hands().count()
<< ", extended fingers: " << frame.fingers().extended().count()
<< ", tools: " << frame.tools().count()
<< ", gestures: " << frame.gestures().count() << std::endl;
Leap::HandList hands = frame.hands();
for (Leap::HandList::const_iterator hl = hands.begin(); hl != hands.end(); ++hl) {
// Get the first hand
const Leap::Hand hand = *hl;
std::string handType = hand.isLeft() ? "Left hand" : "Right hand";
std::cout << std::string(2, ' ') << handType << ", id: " << hand.id()
<< ", palm position: " << hand.palmPosition() << std::endl;
// Get the hand's normal vector and direction
const Leap::Vector normal = hand.palmNormal();
const Leap::Vector direction = hand.direction();
// Calculate the hand's pitch, roll, and yaw angles
std::cout << std::string(2, ' ') << "pitch: " << direction.pitch() * Leap::RAD_TO_DEG << " degrees, "
<< "roll: " << normal.roll() * Leap::RAD_TO_DEG << " degrees, "
<< "yaw: " << direction.yaw() * Leap::RAD_TO_DEG << " degrees" << std::endl;
// Get the Arm bone
Leap::Arm arm = hand.arm();
std::cout << std::string(2, ' ') << "Arm direction: " << arm.direction()
<< " wrist position: " << arm.wristPosition()
<< " elbow position: " << arm.elbowPosition() << std::endl;
// Get fingers
const Leap::FingerList fingers = hand.fingers();
for (Leap::FingerList::const_iterator fl = fingers.begin(); fl != fingers.end(); ++fl) {
const Leap::Finger finger = *fl;
std::cout << std::string(4, ' ') << fingerNames[finger.type()]
<< " finger, id: " << finger.id()
<< ", length: " << finger.length()
<< "mm, width: " << finger.width() << std::endl;
// Get finger bones
for (int b = 0; b < 4; ++b) {
Leap::Bone::Type boneType = static_cast<Leap::Bone::Type>(b);
Leap::Bone bone = finger.bone(boneType);
std::cout << std::string(6, ' ') << boneNames[boneType]
<< " bone, start: " << bone.prevJoint()
<< ", end: " << bone.nextJoint()
<< ", direction: " << bone.direction() << std::endl;
}
}
}
// Get tools
const Leap::ToolList tools = frame.tools();
for (Leap::ToolList::const_iterator tl = tools.begin(); tl != tools.end(); ++tl) {
const Leap::Tool tool = *tl;
std::cout << std::string(2, ' ') << "Tool, id: " << tool.id()
<< ", position: " << tool.tipPosition()
<< ", direction: " << tool.direction() << std::endl;
}
// Get gestures
const Leap::GestureList gestures = frame.gestures();
for (int g = 0; g < gestures.count(); ++g) {
Leap::Gesture gesture = gestures[g];
switch (gesture.type()) {
case Leap::Gesture::TYPE_CIRCLE:
{
Leap::CircleGesture circle = gesture;
std::string clockwiseness;
if (circle.pointable().direction().angleTo(circle.normal()) <= Leap::PI/2) {
clockwiseness = "clockwise";
} else {
clockwiseness = "counterclockwise";
}
// Calculate angle swept since last frame
float sweptAngle = 0;
if (circle.state() != Leap::Gesture::STATE_START) {
Leap::CircleGesture previousUpdate = Leap::CircleGesture(controller.frame(1).gesture(circle.id()));
sweptAngle = (circle.progress() - previousUpdate.progress()) * 2 * Leap::PI;
}
std::cout << std::string(2, ' ')
<< "Circle id: " << gesture.id()
<< ", state: " << stateNames[gesture.state()]
<< ", progress: " << circle.progress()
<< ", radius: " << circle.radius()
<< ", angle " << sweptAngle * Leap::RAD_TO_DEG
<< ", " << clockwiseness << std::endl;
break;
}
case Leap::Gesture::TYPE_SWIPE:
{
Leap::SwipeGesture swipe = gesture;
std::cout << std::string(2, ' ')
<< "Swipe id: " << gesture.id()
<< ", state: " << stateNames[gesture.state()]
<< ", direction: " << swipe.direction()
<< ", speed: " << swipe.speed() << std::endl;
break;
}
case Leap::Gesture::TYPE_KEY_TAP:
{
Leap::KeyTapGesture tap = gesture;
std::cout << std::string(2, ' ')
<< "Key Tap id: " << gesture.id()
<< ", state: " << stateNames[gesture.state()]
<< ", position: " << tap.position()
<< ", direction: " << tap.direction()<< std::endl;
break;
}
case Leap::Gesture::TYPE_SCREEN_TAP:
{
Leap::ScreenTapGesture screentap = gesture;
std::cout << std::string(2, ' ')
<< "Screen Tap id: " << gesture.id()
<< ", state: " << stateNames[gesture.state()]
<< ", position: " << screentap.position()
<< ", direction: " << screentap.direction()<< std::endl;
break;
}
default:
std::cout << std::string(2, ' ') << "Unknown gesture type." << std::endl;
break;
}
}
if (!frame.hands().isEmpty() || !gestures.isEmpty()) {
std::cout << std::endl;
}
}
