C++ Pointable::isValid方法代码示例

static VALUE valid_p(VALUE self)
{
  Leap::Pointable * pointer;

  Data_Get_Struct(self, Leap::Pointable, pointer);

  if (pointer->isValid())
    return Qtrue;

  return Qfalse;
}

void Scene::updateInteraction( const Frame& frame )
{
  static const uint8_t kMaxContactMissedFrames = 64;

  (void)frame;

  for (size_t i=0; i < m_uiNumObjects; i++) 
  {
    const SceneObjectPtr& pObj = m_apObjects[i];

    if (!pObj->HasInitialContact() && pObj->GetNumContacts() == 0 && pObj->GetNumPointing() == 0) 
    {
      pObj->m_fTotalHitTime = 0.0f;
    }
    /// selection state change from not selected to selected
    else if ( !pObj->IsSelected() && pObj->m_fTotalHitTime >= m_fSelectHitTime )
    {
      SceneInteraction selection;
      selection.m_uiFlags = kIT_SelectionChange | kIT_IsSelected;
      selection.m_pObject = pObj;
      queueInteraction( selection );
    }
    /// possible manipulation 
    else if ( pObj->IsSelected() ) 
    {

      if ( pObj->HasInitialContact() )
      {
        const SceneContactPoint& initContact  = pObj->m_initialContactPoint;
        Leap::Pointable contactPointable      = frame.pointable(initContact.m_iPointableID);

        if ( contactPointable.isValid() )
        {
            const Vector      vPointablePos  = TransformFramePoint(contactPointable.tipPosition());
            const Vector      vTrans         = (vPointablePos - pObj->GetCenter());
            SceneInteraction  translation;

            translation.m_mtxTransform.origin = vTrans;
            translation.m_uiFlags |= kIT_Translation;
            translation.m_pObject = pObj;

            queueInteraction( translation );

            pObj->m_uiHasInitialContact = kMaxContactMissedFrames;
        }
        else
        {
          pObj->m_uiHasInitialContact--;

          if ( !pObj->m_uiLastNumContacts )
          {
            pObj->ClearHits();
          }
        }
      }
      else
      {
        if ( pObj->GetNumContacts()  )
        {
          pObj->m_initialContactPoint = *(pObj->GetContactPoint(0));
          pObj->m_initialContactPoint.m_vPoint -= pObj->GetCenter();
          pObj->m_uiHasInitialContact = kMaxContactMissedFrames;
        }
        else if ( pObj->GetLastNumContacts() )
        {
          pObj->m_initialContactPoint = *(pObj->GetLastContactPoint(0));
          pObj->m_initialContactPoint.m_vPoint -= pObj->GetCenter();
          pObj->m_uiHasInitialContact = kMaxContactMissedFrames;
        }
      }

      /// multi touch
      if (pObj->GetLastNumContacts() >= 2 && pObj->GetNumContacts() >= 2) 
      {
        const SceneContactPoint&  lastContact0  = *(pObj->GetLastContactPoint(0));
        const SceneContactPoint&  lastContact1  = *(pObj->GetLastContactPoint(1));
        const SceneContactPoint*  pCurContact0  = pObj->GetContactPointByPointableID( lastContact0.m_iPointableID );
        const SceneContactPoint*  pCurContact1  = pObj->GetContactPointByPointableID( lastContact1.m_iPointableID );

        if ( pCurContact0 && pCurContact1 )
        {
          const Vector lastVec = (lastContact1.m_vPoint - lastContact0.m_vPoint);
          const Vector newVec = (pCurContact1->m_vPoint - pCurContact0->m_vPoint);

          if ( !IsNearEqual(lastVec, newVec) && !IsNearZero(lastVec) ) 
          {
            const float   fLastDist = lastVec.magnitude();
            const float   fNewDist  = newVec.magnitude();
            /// scale by change in pinch distance
            const float   fScale    = fNewDist/fLastDist;

            /// rotate by tilt of fingers
            const Vector  vLastDir  = lastVec * 1.0f/fLastDist;
            const Vector  vNewDir   = newVec  * 1.0f/fNewDist;

            const Vector  vAxis     = vNewDir.cross(vLastDir);
            const float   fAngle    = acosf( vNewDir.dot(vLastDir) );

            /// translate by average movement
            const Vector  vTrans    = ( (pCurContact0->m_vPoint - lastContact0.m_vPoint) + 
//.........这里部分代码省略.........

void ZirkLeap::onFrame(const Leap::Controller& controller) {
    if(controller.hasFocus()) {
        Leap::Frame frame = controller.frame();
        if (mPointableId >= 0) {
            ourProcessor->setSelectedSource(mEditor->getCBSelectedSource()-1);
            Leap::Pointable p = frame.pointable(mPointableId);
            if (!p.isValid() || !p.isExtended()) {
                mPointableId = -1;
                mLastPositionValid = false;
            } else {
                Leap::Vector pos = p.tipPosition();
                const float zPlane1 = 50;	// 5 cm
                const float zPlane2 = 100;	// 10 cm
                
                if (pos.z < zPlane2) {
                    if (mLastPositionValid) {
                        //Leap Motion mouvement are calculated from the last position in order to have something dynamic and ergonomic
                        Leap::Vector delta = pos- mLastPosition;
                        
                        float scale = 3;
                        if (pos.z > zPlane1) {
                            float s = 1 - (pos.z - zPlane1) / (zPlane2 - zPlane1);
                            scale *= s;
                            
                        }
                        
                        int src = ourProcessor->getSelectedSource();
                        float fX, fY;
                        ourProcessor->getSources()[src].getXY(fX, fY);
                        fX += delta.x * scale;
                        fY -= delta.y * scale;
                        
                        //clamp coordinates to circle
                        float fCurR = hypotf(fX, fY);
                        if ( fCurR > ZirkOscAudioProcessor::s_iDomeRadius){
                            float fExtraRatio = ZirkOscAudioProcessor::s_iDomeRadius / fCurR;
                            fX *= fExtraRatio;
                            fY *= fExtraRatio;
                        }
                        
                        mEditor->move(src, fX, fY);
                    } else {
                        //std::cout << "pointable last pos not valid" << std::endl;
                    }
                    mLastPosition = pos;
                    mLastPositionValid = true;
                } else {
                    //std::cout << "pointable not touching plane" << std::endl;
                    mLastPositionValid = false;
                }
            }
        }
        if (mPointableId < 0) {
            Leap::PointableList pl = frame.pointables().extended();
            if (pl.count() > 0) {
                mPointableId = pl[0].id();
                //std::cout << "got new pointable: " << mPointableId << std::endl;
            }
        }
    }
}

void DefaultQtLeapMouseHandler::onFrame(const Leap::Frame &frame)
{
    /////// MOUSE EVENTS /////////
    // MOUSE BUTTON PRESSED
    // MOUSE BUTTON RELEASED
    // MOUSE MOVE

    if (this->listeners.empty())
        return ;

    Leap::Pointable pointer = frame.pointable(this->savedMousePointableId);
    if (!pointer.isValid())
    {
        pointer = frame.pointables().frontmost();
        this->savedMousePointableId = pointer.id();
    }

    bool forceRelease = (frame.pointables().count() == 0 && this->mousePressed);
    QMouseEvent::Type frameMouseEvent = QMouseEvent::None;
    QPointF globalPointerPos = QtLeapUtils::convertPointablePosToScreenPos(frame.interactionBox(), pointer);
    Qt::MouseButton button = Qt::NoButton;
    Qt::MouseButtons buttons = Qt::NoButton;

    // FINGER TOUCHING AND NO PREVIOUS PRESS -> SETTING BUTTON PRESS
    if (pointer.touchDistance() <= 0 &&
            pointer.touchZone() == Leap::Pointable::ZONE_TOUCHING &&
            !this->mousePressed)
    {
        this->mousePressed = true;
        frameMouseEvent = QMouseEvent::MouseButtonPress;
        button = Qt::LeftButton;
    }
    else if (this->mousePressed && (pointer.touchDistance() > 0 ||
                                    pointer.touchZone() == Leap::Pointable::ZONE_NONE ||
                                    forceRelease))         // FINGER NOT TOUCHING AND PREVIOUS PRESS -> RELEASING BUTTON PRESS
    {
        frameMouseEvent = QMouseEvent::MouseButtonRelease;
        this->mousePressed = false;
        button = Qt::LeftButton;
    }
    else if (frameMouseEvent == QMouseEvent::None &&     // FINGER IN TOUCHING OR HOVERING ZONE AND NO BUTTON PRESS / RELEASE CHANGE -> MouseMove
             pointer.touchZone() != Leap::Pointable::ZONE_NONE
             && globalPointerPos.toPoint() != this->previousPos)
    {
        frameMouseEvent = QMouseEvent::MouseMove;
        this->previousPos = globalPointerPos.toPoint();
        QCursor::setPos(this->previousPos);
    }

    if (this->mousePressed)
        buttons |= Qt::LeftButton;

    if (frameMouseEvent != QMouseEvent::None)
        foreach (QObject *listener, this->listeners)
            QCoreApplication::postEvent(listener, new QMouseEvent(frameMouseEvent,
                                                                  QtLeapUtils::convertGlobalPosToLocalPos(listener, globalPointerPos),
                                                                  globalPointerPos,
                                                                  button,
                                                                  buttons,
                                                                  Qt::NoModifier));
}