void Touch::UpdateTouches(Controls& controls) // Called from HandleUpdate
{
zoom_ = false; // reset bool
Input* input = GetSubsystem<Input>();
// Zoom in/out
if (input->GetNumTouches() == 2)
{
TouchState* touch1 = input->GetTouch(0);
TouchState* touch2 = input->GetTouch(1);
// Check for zoom pattern (touches moving in opposite directions and on empty space)
if (!touch1->touchedElement_ && !touch2->touchedElement_ && ((touch1->delta_.y_ > 0 && touch2->delta_.y_ < 0) || (touch1->delta_.y_ < 0 && touch2->delta_.y_ > 0)))
zoom_ = true;
else
zoom_ = false;
if (zoom_)
{
int sens = 0;
// Check for zoom direction (in/out)
if (Abs(touch1->position_.y_ - touch2->position_.y_) > Abs(touch1->lastPosition_.y_ - touch2->lastPosition_.y_))
sens = -1;
else
sens = 1;
cameraDistance_ += Abs(touch1->delta_.y_ - touch2->delta_.y_) * sens * touchSensitivity_ / 50.0f;
cameraDistance_ = Clamp(cameraDistance_, CAMERA_MIN_DIST, CAMERA_MAX_DIST); // Restrict zoom range to [1;20]
}
}
// Gyroscope (emulated by SDL through a virtual joystick)
if (useGyroscope_ && input->GetNumJoysticks() > 0) // numJoysticks = 1 on iOS & Android
{
JoystickState* joystick = input->GetJoystickByIndex(0);
if (joystick->GetNumAxes() >= 2)
{
if (joystick->GetAxisPosition(0) < -GYROSCOPE_THRESHOLD)
controls.Set(CTRL_LEFT, true);
if (joystick->GetAxisPosition(0) > GYROSCOPE_THRESHOLD)
controls.Set(CTRL_RIGHT, true);
if (joystick->GetAxisPosition(1) < -GYROSCOPE_THRESHOLD)
controls.Set(CTRL_FORWARD, true);
if (joystick->GetAxisPosition(1) > GYROSCOPE_THRESHOLD)
controls.Set(CTRL_BACK, true);
}
}
}
void SceneReplication::HandlePhysicsPreStep(StringHash eventType, VariantMap& eventData)
{
// This function is different on the client and server. The client collects controls (WASD controls + yaw angle)
// and sets them to its server connection object, so that they will be sent to the server automatically at a
// fixed rate, by default 30 FPS. The server will actually apply the controls (authoritative simulation.)
Network* network = GetSubsystem<Network>();
Connection* serverConnection = network->GetServerConnection();
// Client: collect controls
if (serverConnection)
{
UI* ui = GetSubsystem<UI>();
Input* input = GetSubsystem<Input>();
Controls controls;
// Copy mouse yaw
controls.yaw_ = yaw_;
// Only apply WASD controls if there is no focused UI element
if (!ui->GetFocusElement())
{
controls.Set(CTRL_FORWARD, input->GetKeyDown('W'));
controls.Set(CTRL_BACK, input->GetKeyDown('S'));
controls.Set(CTRL_LEFT, input->GetKeyDown('A'));
controls.Set(CTRL_RIGHT, input->GetKeyDown('D'));
}
serverConnection->SetControls(controls);
// In case the server wants to do position-based interest management using the NetworkPriority components, we should also
// tell it our observer (camera) position. In this sample it is not in use, but eg. the NinjaSnowWar game uses it
serverConnection->SetPosition(cameraNode_->GetPosition());
}
// Server: apply controls to client objects
else if (network->IsServerRunning())
{
const Vector<SharedPtr<Connection> >& connections = network->GetClientConnections();
for (unsigned i = 0; i < connections.Size(); ++i)
{
Connection* connection = connections[i];
// Get the object this connection is controlling
Node* ballNode = serverObjects_[connection];
if (!ballNode)
continue;
RigidBody* body = ballNode->GetComponent<RigidBody>();
// Get the last controls sent by the client
const Controls& controls = connection->GetControls();
// Torque is relative to the forward vector
Quaternion rotation(0.0f, controls.yaw_, 0.0f);
const float MOVE_TORQUE = 3.0f;
// Movement torque is applied before each simulation step, which happen at 60 FPS. This makes the simulation
// independent from rendering framerate. We could also apply forces (which would enable in-air control),
// but want to emphasize that it's a ball which should only control its motion by rolling along the ground
if (controls.buttons_ & CTRL_FORWARD)
body->ApplyTorque(rotation * Vector3::RIGHT * MOVE_TORQUE);
if (controls.buttons_ & CTRL_BACK)
body->ApplyTorque(rotation * Vector3::LEFT * MOVE_TORQUE);
if (controls.buttons_ & CTRL_LEFT)
body->ApplyTorque(rotation * Vector3::FORWARD * MOVE_TORQUE);
if (controls.buttons_ & CTRL_RIGHT)
body->ApplyTorque(rotation * Vector3::BACK * MOVE_TORQUE);
}
}
}