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Merge pull request #7631 from sethalves/parent-equipping-and-platform-hack

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treat children of avatars and children of entities differently until velocity handling is fixed
This commit is contained in:
Brad Hefta-Gaub 2016-04-10 14:55:03 -07:00
commit cc418c615f
2 changed files with 12 additions and 5 deletions
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3
libraries/entities/src/EntityItem.cpp
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@ -888,9 +888,6 @@ void EntityItem::simulateKinematicMotion(float timeElapsed, bool setFlags) {
if (hasActions()) {
return;
}
if (!_parentID.isNull()) {
return;
}
if (hasLocalAngularVelocity()) {
glm::vec3 localAngularVelocity = getLocalAngularVelocity();

14
libraries/shared/src/SpatiallyNestable.cpp
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@ -422,8 +422,18 @@ void SpatiallyNestable::setVelocity(const glm::vec3& velocity, bool& success) {
glm::vec3 parentVelocity = getParentVelocity(success);
Transform parentTransform = getParentTransform(success);
_velocityLock.withWriteLock([&] {
// TODO: take parent angularVelocity into account.
_velocity = glm::inverse(parentTransform.getRotation()) * (velocity - parentVelocity);
// HACK: until we are treating _velocity the same way we treat _position (meaning,
// _velocity is a vs parent value and any request for a world-frame velocity must
// be computed), do this to avoid equipped (parenting-grabbed) things from drifting.
// turning a zero velocity into a non-zero _velocity (because the avatar is moving)
// causes EntityItem::simulateKinematicMotion to have an effect on the equipped entity,
// which causes it to drift from the hand.
if (hasAncestorOfType(NestableType::Avatar)) {
_velocity = velocity;
} else {
// TODO: take parent angularVelocity into account.
_velocity = glm::inverse(parentTransform.getRotation()) * (velocity - parentVelocity);
}
});
}