// Runs update logic
void GestureApp::update()
{
// Update frame rate
mFrameRate = getAverageFps();
// Toggle fullscreen
if ( mFullScreen != isFullScreen() ) {
setFullScreen( mFullScreen );
}
// Update device
if ( mLeap && mLeap->isConnected() ) {
mLeap->update();
}
const vector<Leap::Gesture>& gestures = mFrame.getGestures();
for ( vector<Leap::Gesture>::const_iterator iter = gestures.begin(); iter != gestures.end(); ++iter ) {
Gesture::Type type = iter->type();
if ( type == Gesture::Type::TYPE_CIRCLE ) {
// Cast to circle gesture
const Leap::CircleGesture& gesture = (Leap::CircleGesture)*iter;
// Control dial
mDialBrightness = 1.0f;
mDialValueDest = gesture.progress();
} else if ( type == Gesture::Type::TYPE_KEY_TAP ) {
// Cast to circle gesture and read data
const Leap::KeyTapGesture& gesture = (Leap::KeyTapGesture)*iter;
Vec2f center = warpVector( fromLeapVector( gesture.position() ) );
center -= mOffset;
// Press key
for ( vector<Key>::iterator iter = mKeys.begin(); iter != mKeys.end(); ++iter ) {
if ( iter->mBounds.contains( center ) ) {
iter->mBrightness = 1.0f;
break;
}
}
} else if ( type == Gesture::Type::TYPE_SCREEN_TAP ) {
// Turn background white for screen tap
mBackgroundBrightness = 1.0f;
} else if ( type == Gesture::Type::TYPE_SWIPE ) {
// Cast to swipe gesture and read data
const Leap::SwipeGesture& gesture = (Leap::SwipeGesture)*iter;
ci::Vec2f a = warpVector( fromLeapVector( gesture.startPosition() ) );
ci::Vec2f b = warpVector( fromLeapVector( gesture.position() ) );
// Update swipe position
mSwipeBrightness = 1.0f;
if ( gesture.state() == Gesture::State::STATE_STOP ) {
mSwipePosDest = b.x < a.x ? 0.0f : 1.0f;
} else {
float step = mSwipeStep;
mSwipePosDest += b.x < a.x ? -step : step;
}
mSwipePosDest = math<float>::clamp( mSwipePosDest, 0.0f, 1.0f );
}
}
// UI animation
mDialValue = lerp( mDialValue, mDialValueDest, mDialSpeed );
mSwipePos = lerp( mSwipePos, mSwipePosDest, mSwipePosSpeed );
mBackgroundBrightness *= mFadeSpeed;
mDialBrightness *= mFadeSpeed;
mSwipeBrightness *= mFadeSpeed;
for ( vector<Key>::iterator iter = mKeys.begin(); iter != mKeys.end(); ++iter ) {
iter->mBrightness *= mFadeSpeed;
}
}
// Draw active gestures with dotted lines
void GestureApp::drawGestures()
{
gl::color( ColorAf::white() );
// Iterate through gestures
const vector<Leap::Gesture>& gestures = mFrame.getGestures();
for ( vector<Leap::Gesture>::const_iterator iter = gestures.begin(); iter != gestures.end(); ++iter ) {
Gesture::Type type = iter->type();
if ( type == Gesture::Type::TYPE_CIRCLE ) {
// Cast to circle gesture and read data
const Leap::CircleGesture& gesture = (Leap::CircleGesture)*iter;
Vec2f pos = warpVector( fromLeapVector( gesture.center() ) );
float progress = gesture.progress();
float radius = gesture.radius() * 2.0f; // Don't ask, it works
drawDottedCircle( pos, radius, mDotRadius, mCircleResolution, progress );
} else if ( type == Gesture::Type::TYPE_KEY_TAP ) {
// Cast to circle gesture and read data
const Leap::KeyTapGesture& gesture = (Leap::KeyTapGesture)*iter;
Vec2f center = warpVector( fromLeapVector( gesture.position() ) );
// Draw square where key press happened
Vec2f size( 30.0f, 30.0f );
drawDottedRect( center, size );
} else if ( type == Gesture::Type::TYPE_SCREEN_TAP ) {
// Draw big square on center of screen
Vec2f center = getWindowCenter();
Vec2f size( 300.0f, 300.0f );
drawDottedRect( center, size );
} else if ( type == Gesture::Type::TYPE_SWIPE ) {
// Cast to swipe gesture and read data
const Leap::SwipeGesture& gesture = (Leap::SwipeGesture)*iter;
ci::Vec2f a = warpVector( fromLeapVector( gesture.startPosition() ) );
ci::Vec2f b = warpVector( fromLeapVector( gesture.position() ) );
// Set draw direction
float spacing = mDotRadius * 3.0f;
float direction = 1.0f;
if ( b.x < a.x ) {
direction *= -1.0f;
swap( a, b );
}
// Draw swipe line
Vec2f pos = a;
while ( pos.x <= b.x ) {
pos.x += spacing;
gl::drawSolidCircle( pos, mDotRadius, 32 );
}
// Draw arrow head
if ( direction > 0.0f ) {
pos = b;
spacing *= -1.0f;
} else {
pos = a;
pos.x += spacing;
}
pos.y = a.y;
pos.x += spacing;
gl::drawSolidCircle( pos + Vec2f( 0.0f, spacing ), mDotRadius, 32 );
gl::drawSolidCircle( pos + Vec2f( 0.0f, spacing * -1.0f ), mDotRadius, 32 );
pos.x += spacing;
gl::drawSolidCircle( pos + Vec2f( 0.0f, spacing * 2.0f ), mDotRadius, 32 );
gl::drawSolidCircle( pos + Vec2f( 0.0f, spacing * -2.0f ), mDotRadius, 32 );
}
}
}