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fix rapid attenuation of angular velocity

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This commit is contained in:
Andrew Meadows 2015-01-07 12:42:50 -08:00
parent 476887b7ef
commit 1745548665
1 changed files with 10 additions and 7 deletions
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17
libraries/entities/src/EntityItem.cpp
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@ -647,27 +647,30 @@ void EntityItem::simulate(const quint64& now) {
glm::quat rotation = getRotation(); glm::quat rotation = getRotation();
// angular damping // angular damping
glm::vec3 angularVelocity = glm::radians(getAngularVelocity()); glm::vec3 angularVelocity = getAngularVelocity();
if (_angularDamping > 0.0f) { if (_angularDamping > 0.0f) {
angularVelocity *= powf(1.0f - _angularDamping, timeElapsed); angularVelocity *= powf(1.0f - _angularDamping, timeElapsed);
if (wantDebug) { if (wantDebug) {
qDebug() << " angularDamping :" << _angularDamping; qDebug() << " angularDamping :" << _angularDamping;
qDebug() << " newAngularVelocity:" << angularVelocity; qDebug() << " newAngularVelocity:" << angularVelocity;
} }
setAngularVelocity(angularVelocity);
} }
float angularSpeed = glm::length(angularVelocity); float angularSpeed = glm::length(_angularVelocity);
const float EPSILON_ANGULAR_VELOCITY_LENGTH = 0.0017453f; // ~0.1 degree/sec const float EPSILON_ANGULAR_VELOCITY_LENGTH = 0.1; //
if (angularSpeed < EPSILON_ANGULAR_VELOCITY_LENGTH) { if (angularSpeed < EPSILON_ANGULAR_VELOCITY_LENGTH) {
angularVelocity = NO_ANGULAR_VELOCITY; setAngularVelocity(NO_ANGULAR_VELOCITY);
} else { } else {
float angle = timeElapsed * angularSpeed; // NOTE: angularSpeed is currently in degrees/sec!!!
glm::quat dQ = glm::angleAxis(angle, glm::normalize(angularVelocity)); // TODO: Andrew to convert to radians/sec
float angle = timeElapsed * glm::radians(angularSpeed);
glm::vec3 axis = _angularVelocity / angularSpeed;
glm::quat dQ = glm::angleAxis(angle, axis);
rotation = glm::normalize(dQ * rotation); rotation = glm::normalize(dQ * rotation);
setRotation(rotation); setRotation(rotation);
} }
setAngularVelocity(angularVelocity);
} }
#ifdef USE_BULLET_PHYSICS #ifdef USE_BULLET_PHYSICS