//
// read_node
//
void ClientSidePrediction::read_node(MemoryBuffer& message)
{
auto network = GetSubsystem<Network>();
auto scene = network->GetServerConnection()->GetScene();
auto node_id = message.ReadUInt();
auto node = scene->GetNode(node_id);
bool new_node = false;
// Create the node if it doesn't exist
if (!node)
{
new_node = true;
// Add initially to the root level. May be moved as we receive the parent attribute
node = scene->CreateChild(node_id, LOCAL);
// Create smoothed transform component
node->CreateComponent<SmoothedTransform>(LOCAL);
}
else
{
// Remove the node from the unused nodes list
unused_nodes.erase(node);
}
// Read attributes
read_network_attributes(*node, message);
// ApplyAttributes() is deliberately skipped, as Node has no attributes that require late applying.
// Furthermore it would propagate to components and child nodes, which is not desired in this case
if (new_node)
{
// Snap the motion smoothing immediately to the end
auto transform = node->GetComponent<SmoothedTransform>();
if (transform)
transform->Update(1.0f, 0.0f);
}
// Read user variables
unsigned num_vars = message.ReadVLE();
for (; num_vars > 0; --num_vars)
{
auto key = message.ReadStringHash();
node->SetVar(key, message.ReadVariant());
}
// Read components
unsigned num_components = message.ReadVLE();
for (; num_components > 0; --num_components)
read_component(message, node);
}
//
// read_scene_state
//
void ClientSidePrediction::read_scene_state(MemoryBuffer& message)
{
auto network = GetSubsystem<Network>();
auto scene = network->GetServerConnection()->GetScene();
// Read last input ID
auto new_server_id = message.ReadUInt();
// Make sure it's more recent than the previous last ID since we're sending unordered messages
// Handle range looping correctly
if (id > server_id)
{
if (new_server_id < server_id)
return;
}
else
{
if (new_server_id > server_id)
return;
}
server_id = new_server_id;
// Reset the unused nodes set
unused_nodes.clear();
for (auto node : scene_nodes[scene])
unused_nodes.insert(node);
// Read number of nodes
auto num_nodes = message.ReadVLE();
// Read nodes
for (; num_nodes > 0; --num_nodes)
read_node(message);
// Remove unsued nodes
for (auto node : unused_nodes)
node->Remove();
// Perform client side prediction
predict();
}