void Head::simulate(float deltaTime, bool isMine, bool billboard) {
// Update audio trailing average for rendering facial animations
const float AUDIO_AVERAGING_SECS = 0.05f;
const float AUDIO_LONG_TERM_AVERAGING_SECS = 30.0f;
_averageLoudness = glm::mix(_averageLoudness, _audioLoudness, glm::min(deltaTime / AUDIO_AVERAGING_SECS, 1.0f));
if (_longTermAverageLoudness == -1.0f) {
_longTermAverageLoudness = _averageLoudness;
} else {
_longTermAverageLoudness = glm::mix(_longTermAverageLoudness, _averageLoudness, glm::min(deltaTime / AUDIO_LONG_TERM_AVERAGING_SECS, 1.0f));
}
if (isMine) {
MyAvatar* myAvatar = static_cast<MyAvatar*>(_owningAvatar);
// Only use face trackers when not playing back a recording.
if (!myAvatar->isPlaying()) {
FaceTracker* faceTracker = Application::getInstance()->getActiveFaceTracker();
_isFaceTrackerConnected = faceTracker != NULL && !faceTracker->isMuted();
if (_isFaceTrackerConnected) {
_blendshapeCoefficients = faceTracker->getBlendshapeCoefficients();
if (typeid(*faceTracker) == typeid(DdeFaceTracker)) {
if (Menu::getInstance()->isOptionChecked(MenuOption::UseAudioForMouth)) {
calculateMouthShapes();
const int JAW_OPEN_BLENDSHAPE = 21;
const int MMMM_BLENDSHAPE = 34;
const int FUNNEL_BLENDSHAPE = 40;
const int SMILE_LEFT_BLENDSHAPE = 28;
const int SMILE_RIGHT_BLENDSHAPE = 29;
_blendshapeCoefficients[JAW_OPEN_BLENDSHAPE] += _audioJawOpen;
_blendshapeCoefficients[SMILE_LEFT_BLENDSHAPE] += _mouth4;
_blendshapeCoefficients[SMILE_RIGHT_BLENDSHAPE] += _mouth4;
_blendshapeCoefficients[MMMM_BLENDSHAPE] += _mouth2;
_blendshapeCoefficients[FUNNEL_BLENDSHAPE] += _mouth3;
}
applyEyelidOffset(getFinalOrientationInWorldFrame());
}
}
auto eyeTracker = DependencyManager::get<EyeTracker>();
_isEyeTrackerConnected = eyeTracker->isTracking();
}
if (!myAvatar->getStandingHMDSensorMode()) {
// Twist the upper body to follow the rotation of the head, but only do this with my avatar,
// since everyone else will see the full joint rotations for other people.
const float BODY_FOLLOW_HEAD_YAW_RATE = 0.1f;
const float BODY_FOLLOW_HEAD_FACTOR = 0.66f;
float currentTwist = getTorsoTwist();
setTorsoTwist(currentTwist + (getFinalYaw() * BODY_FOLLOW_HEAD_FACTOR - currentTwist) * BODY_FOLLOW_HEAD_YAW_RATE);
}
}
if (!(_isFaceTrackerConnected || billboard)) {
if (!_isEyeTrackerConnected) {
// Update eye saccades
const float AVERAGE_MICROSACCADE_INTERVAL = 1.0f;
const float AVERAGE_SACCADE_INTERVAL = 6.0f;
const float MICROSACCADE_MAGNITUDE = 0.002f;
const float SACCADE_MAGNITUDE = 0.04f;
const float NOMINAL_FRAME_RATE = 60.0f;
if (randFloat() < deltaTime / AVERAGE_MICROSACCADE_INTERVAL) {
_saccadeTarget = MICROSACCADE_MAGNITUDE * randVector();
} else if (randFloat() < deltaTime / AVERAGE_SACCADE_INTERVAL) {
_saccadeTarget = SACCADE_MAGNITUDE * randVector();
}
_saccade += (_saccadeTarget - _saccade) * pow(0.5f, NOMINAL_FRAME_RATE * deltaTime);
} else {
_saccade = glm::vec3();
}
// Detect transition from talking to not; force blink after that and a delay
bool forceBlink = false;
const float TALKING_LOUDNESS = 100.0f;
const float BLINK_AFTER_TALKING = 0.25f;
if ((_averageLoudness - _longTermAverageLoudness) > TALKING_LOUDNESS) {
_timeWithoutTalking = 0.0f;
} else if (_timeWithoutTalking < BLINK_AFTER_TALKING && (_timeWithoutTalking += deltaTime) >= BLINK_AFTER_TALKING) {
forceBlink = true;
}
// Update audio attack data for facial animation (eyebrows and mouth)
const float AUDIO_ATTACK_AVERAGING_RATE = 0.9f;
_audioAttack = AUDIO_ATTACK_AVERAGING_RATE * _audioAttack + (1.0f - AUDIO_ATTACK_AVERAGING_RATE) * fabs((_audioLoudness - _longTermAverageLoudness) - _lastLoudness);
_lastLoudness = (_audioLoudness - _longTermAverageLoudness);
const float BROW_LIFT_THRESHOLD = 100.0f;
if (_audioAttack > BROW_LIFT_THRESHOLD) {
_browAudioLift += sqrtf(_audioAttack) * 0.01f;
}
_browAudioLift = glm::clamp(_browAudioLift *= 0.7f, 0.0f, 1.0f);
const float BLINK_SPEED = 10.0f;
const float BLINK_SPEED_VARIABILITY = 1.0f;
const float BLINK_START_VARIABILITY = 0.25f;
const float FULLY_OPEN = 0.0f;
const float FULLY_CLOSED = 1.0f;
if (_leftEyeBlinkVelocity == 0.0f && _rightEyeBlinkVelocity == 0.0f) {
// no blinking when brows are raised; blink less with increasing loudness
const float BASE_BLINK_RATE = 15.0f / 60.0f;
const float ROOT_LOUDNESS_TO_BLINK_INTERVAL = 0.25f;
if (forceBlink || (_browAudioLift < EPSILON && shouldDo(glm::max(1.0f, sqrt(fabs(_averageLoudness - _longTermAverageLoudness)) *
ROOT_LOUDNESS_TO_BLINK_INTERVAL) / BASE_BLINK_RATE, deltaTime))) {
_leftEyeBlinkVelocity = BLINK_SPEED + randFloat() * BLINK_SPEED_VARIABILITY;
_rightEyeBlinkVelocity = BLINK_SPEED + randFloat() * BLINK_SPEED_VARIABILITY;
if (randFloat() < 0.5f) {
_leftEyeBlink = BLINK_START_VARIABILITY;
} else {
_rightEyeBlink = BLINK_START_VARIABILITY;
}
}
} else {
_leftEyeBlink = glm::clamp(_leftEyeBlink + _leftEyeBlinkVelocity * deltaTime, FULLY_OPEN, FULLY_CLOSED);
_rightEyeBlink = glm::clamp(_rightEyeBlink + _rightEyeBlinkVelocity * deltaTime, FULLY_OPEN, FULLY_CLOSED);
if (_leftEyeBlink == FULLY_CLOSED) {
_leftEyeBlinkVelocity = -BLINK_SPEED;
} else if (_leftEyeBlink == FULLY_OPEN) {
_leftEyeBlinkVelocity = 0.0f;
}
if (_rightEyeBlink == FULLY_CLOSED) {
_rightEyeBlinkVelocity = -BLINK_SPEED;
} else if (_rightEyeBlink == FULLY_OPEN) {
_rightEyeBlinkVelocity = 0.0f;
}
}
// use data to update fake Faceshift blendshape coefficients
calculateMouthShapes();
DependencyManager::get<Faceshift>()->updateFakeCoefficients(_leftEyeBlink,
_rightEyeBlink,
_browAudioLift,
_audioJawOpen,
_mouth2,
_mouth3,
_mouth4,
_blendshapeCoefficients);
applyEyelidOffset(getOrientation());
} else {
_saccade = glm::vec3();
}
if (Menu::getInstance()->isOptionChecked(MenuOption::FixGaze)) { // if debug menu turns off, use no saccade
_saccade = glm::vec3();
}
_leftEyePosition = _rightEyePosition = getPosition();
if (!billboard) {
_faceModel.simulate(deltaTime);
if (!_faceModel.getEyePositions(_leftEyePosition, _rightEyePosition)) {
static_cast<Avatar*>(_owningAvatar)->getSkeletonModel().getEyePositions(_leftEyePosition, _rightEyePosition);
}
}
_eyePosition = calculateAverageEyePosition();
}
