/// btMotionState override. Called when Bullet wants to tell us the body's current transform
void setWorldTransform(const btTransform &worldTrans)
{
/// \todo For a large scene, applying the changed transforms of rigid bodies is slow (slower than the physics simulation itself,
/// or handling collisions) due to the large number of signals being fired.
// Cannot modify server-authoritative physics object, rather get the transform changes through placeable attributes
const bool hasAuthority = rigidBody->HasAuthority();
if (!hasAuthority && !clientExtrapolating)
return;
if (placeable.Expired())
return;
Placeable* p = placeable;
// Important: disconnect our own response to attribute changes to not create an endless loop!
disconnected = true;
AttributeChange::Type changeType = hasAuthority ? AttributeChange::Default : AttributeChange::LocalOnly;
// Set transform
float3 position = worldTrans.getOrigin();
Quat orientation = worldTrans.getRotation();
// Non-parented case
if (p->parentRef.Get().IsEmpty())
{
Transform newTrans = p->transform.Get();
newTrans.SetPos(position.x, position.y, position.z);
newTrans.SetOrientation(orientation);
p->transform.Set(newTrans, changeType);
}
else
// The placeable has a parent itself
{
Urho3D::Node* parent = p->UrhoSceneNode()->GetParent();
if (parent)
{
position = parent->WorldToLocal(position);
orientation = parent->GetWorldRotation().Inverse() * orientation;
Transform newTrans = p->transform.Get();
newTrans.SetPos(position);
newTrans.SetOrientation(orientation);
p->transform.Set(newTrans, changeType);
}
}
// Set linear & angular velocity
if (body)
{
// Performance optimization: because applying each attribute causes signals to be fired, which is slow in a large scene
// (and furthermore, on a server, causes each connection's sync state to be accessed), do not set the linear/angular
// velocities if they haven't changed
float3 linearVel = body->getLinearVelocity();
float3 angularVel = RadToDeg(body->getAngularVelocity());
if (!linearVel.Equals(rigidBody->linearVelocity.Get()))
rigidBody->linearVelocity.Set(linearVel, changeType);
if (!angularVel.Equals(rigidBody->angularVelocity.Get()))
rigidBody->angularVelocity.Set(angularVel, changeType);
}
disconnected = false;
}
