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Exponential relaxation

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Atlante45 2015-02-27 15:33:24 +01:00
parent 5a556a06d2
commit 9849efe013
2 changed files with 8 additions and 6 deletions
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13
interface/src/devices/FaceTracker.cpp
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@ -16,8 +16,7 @@ inline float FaceTracker::getBlendshapeCoefficient(int index) const {
} }
float FaceTracker::getFadeCoefficient() const { float FaceTracker::getFadeCoefficient() const {
// TODO: apply exponential relaxation return _fadeCoefficient;
return _relaxationStatus;
} }
const glm::vec3 FaceTracker::getHeadTranslation() const { const glm::vec3 FaceTracker::getHeadTranslation() const {
@ -29,18 +28,20 @@ const glm::quat FaceTracker::getHeadRotation() const {
} }
void FaceTracker::update(float deltaTime) { void FaceTracker::update(float deltaTime) {
static const float RELAXATION_TIME = 0.4; // sec static const float RELAXATION_TIME = 1.0f; // sec
static const float LAMBDA = 1.5;
if (isTracking()) { if (isTracking()) {
if (_relaxationStatus == 1.0f) { if (_relaxationStatus == 1.0f) {
return; return;
} }
_relaxationStatus += deltaTime / RELAXATION_TIME; _relaxationStatus = glm::clamp(_relaxationStatus + deltaTime / RELAXATION_TIME, 0.0f, 1.0f);
_fadeCoefficient = std::exp(-LAMBDA * _relaxationStatus);
} else { } else {
if (_relaxationStatus == 0.0f) { if (_relaxationStatus == 0.0f) {
return; return;
} }
_relaxationStatus -= deltaTime / RELAXATION_TIME; _relaxationStatus = glm::clamp(_relaxationStatus - deltaTime / RELAXATION_TIME, 0.0f, 1.0f);
_fadeCoefficient = 1.0f - std::exp(-LAMBDA * (1.0f - _relaxationStatus));
} }
_relaxationStatus = glm::clamp(_relaxationStatus, 0.0f, 1.0f);
} }

1
interface/src/devices/FaceTracker.h
View file

@ -51,6 +51,7 @@ protected:
QVector<float> _blendshapeCoefficients; QVector<float> _blendshapeCoefficients;
float _relaxationStatus = 0.0f; // Between 0.0f and 1.0f float _relaxationStatus = 0.0f; // Between 0.0f and 1.0f
float _fadeCoefficient = 0.0f; // Between 0.0f and 1.0f
}; };
#endif // hifi_FaceTracker_h #endif // hifi_FaceTracker_h