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fix angular velocity damping so we don't get bad quats

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This commit is contained in:
ZappoMan 2014-09-10 17:46:50 -07:00
parent cbdaf76b88
commit a3e47aa301
1 changed files with 19 additions and 14 deletions
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33
libraries/entities/src/EntityItem.cpp
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@ -535,21 +535,27 @@ void EntityItem::update(const quint64& updateTime) {
if (hasAngularVelocity()) {
glm::quat rotation = getRotation();
glm::vec3 angularVelocity = glm::radians(getAngularVelocity());
float angle = timeElapsed * glm::length(angularVelocity);
glm::quat dQ = glm::angleAxis(angle, glm::normalize(angularVelocity));
rotation = dQ * rotation;
setRotation(rotation);
float angularSpeed = glm::length(angularVelocity);
// handle damping for angular velocity
if (getAngularDamping() > 0.0f) {
glm::vec3 dampingResistance = getAngularVelocity() * getAngularDamping();
if (wantDebug) {
qDebug() << " getDamping():" << getDamping();
qDebug() << " dampingResistance:" << dampingResistance;
qDebug() << " dampingResistance * timeElapsed:" << dampingResistance * timeElapsed;
if (angularSpeed < EPSILON_VELOCITY_LENGTH) {
setAngularVelocity(NO_ANGULAR_VELOCITY);
} else {
float angle = timeElapsed * angularSpeed;
glm::quat dQ = glm::angleAxis(angle, glm::normalize(angularVelocity));
rotation = dQ * rotation;
setRotation(rotation);
// handle damping for angular velocity
if (getAngularDamping() > 0.0f) {
glm::vec3 dampingResistance = getAngularVelocity() * getAngularDamping();
glm::vec3 newAngularVelocity = getAngularVelocity() - (dampingResistance * timeElapsed);
setAngularVelocity(newAngularVelocity);
if (wantDebug) {
qDebug() << " getDamping():" << getDamping();
qDebug() << " dampingResistance:" << dampingResistance;
qDebug() << " newAngularVelocity:" << newAngularVelocity;
}
}
glm::vec3 newAngularVelocity = getAngularVelocity() - (dampingResistance * timeElapsed);
setAngularVelocity(newAngularVelocity);
}
}
@ -649,7 +655,6 @@ void EntityItem::copyChangedProperties(const EntityItem& other) {
EntityItemProperties EntityItem::getProperties() const {
EntityItemProperties properties;
properties._id = getID();
properties._idSet = true;
properties._created = _created;