private void HandleGrabMove(GrabInfo data, Player player, IInteractionDelegate @delegate)
{
if (this.Grabbables.TryGetValue(data.GrabbableId, out IGrabbable grabbable))
{
grabbable.Move(data.CameraInfo);
}
}
public void Update(CameraInfo cameraInfo)
{
if (this.Delegate == null || this.GrabDelegate == null)
{
throw new Exception("No Delegate");
}
// Dispatch grab action to server so that server can test if grab succeed.
// If grab succeed, server would update the grabbable's player for all clients
// Note:
// This check is done in update to counter the case of network lag
// if touch down and up is very quick, the shouldTryRelease might not trigger right at touch up,
// because information on grabbed grabbableID might not arrived yet
if (this.isTouching && this.GrabbedGrabbable == null)
{
if (GameTime.FrameCount % 3 == 0) // Only send messages at 20 fps to save bandwidth
{
// Send grab message to server if player can grab something
var grabbable = this.GrabbableToGrab(cameraInfo.Ray);
if (grabbable != null)
{
var grab = new GrabInfo(grabbable.GrabbableId, cameraInfo);
this.Delegate.DispatchActionToServer(new GameActionType {
TryGrab = grab, Type = GameActionType.GActionType.TryGrab
});
return;
}
}
}
if (this.GrabbedGrabbable != null)
{
if (!this.Delegate.IsServer)
{
// Client move the sling locally, ignore server's physics data to prevent lag
this.GrabbedGrabbable.Move(cameraInfo);
}
// If touch is up or the sling is pulled too far, release the ball
if (!this.isTouching || this.GrabDelegate.ShouldForceRelease(this.GrabbedGrabbable))
{
if (GameTime.FrameCount % 3 == 0)// Only send messages at 20 fps to save bandwidth
{
var grab = new GrabInfo(this.GrabbedGrabbable.GrabbableId, cameraInfo);
this.Delegate.DispatchActionToServer(new GameActionType {
TryRelease = grab, Type = GameActionType.GActionType.TryRelease
});
return;
}
}
// Dispatch slingMove to server.
var data = new GrabInfo(this.GrabbedGrabbable.GrabbableId, cameraInfo);
this.Delegate.DispatchActionToServer(new GameActionType {
GrabMove = data, Type = GameActionType.GActionType.GrabMove
});
}
}
private void HandleGrabStartAction(GrabInfo data, Player player, IInteractionDelegate @delegate)
{
if (this.GrabDelegate == null)
{
throw new Exception("GrabDelegate not set");
}
var grabbable = this.GrabbableById(data.GrabbableId);
this.GrabbedGrabbable = grabbable;
this.GrabDelegate.OnGrabStart(grabbable, data.CameraInfo, player);
}
private void HandleGrabbableStatus(GrabInfo status)
{
if (this.GrabDelegate == null)
{
throw new Exception("GrabDelegate not set");
}
if (!this.Grabbables.TryGetValue(status.GrabbableId, out IGrabbable grabbable))
{
throw new Exception($"No Grabbable {status.GrabbableId}");
}
grabbable.IsGrabbed = true;
this.GrabDelegate.OnUpdateGrabStatus(grabbable, status.CameraInfo);
}
public void DidCollision(SCNNode node, SCNNode otherNode, SCNVector3 pos, float impulse)
{
var gameObject = node.NearestParentGameObject();
if (gameObject != null && gameObject is Catapult catapult)
{
var otherGameObject = otherNode.NearestParentGameObject();
if (otherGameObject != null)
{
// Projectile case
if (otherGameObject is Projectile projectile)
{
var catapultNode = catapult.Base;
if (catapultNode.PhysicsBody == null)
{
throw new Exception("Catapult has no physicsBody");
}
// Do not let projectile from the same team kill the catapult
if (catapult.Team == projectile.Team)
{
catapultNode.PhysicsBody.Velocity = SCNVector3.Zero;
catapultNode.PhysicsBody.AngularVelocity = SCNVector4.UnitY;
}
}
// Server tries to release the catapult if it got impulse from block or projectile
if (impulse > MinImpuseToReleaseCatapult)
{
if (this.Delegate == null)
{
throw new Exception("No delegate");
}
if (this.Delegate.IsServer)
{
// Any game objects (blocks or projectiles) case
var data = new GrabInfo(catapult.CatapultId, catapult.LastCameraInfo);
this.Delegate.DispatchActionToServer(new GameActionType {
TryRelease = data, Type = GameActionType.GActionType.TryRelease
});
}
}
}
}
}
private void HandleTryGrabAction(GrabInfo data, Player player, IInteractionDelegate @delegate)
{
if (this.GrabDelegate == null)
{
throw new Exception("GrabDelegate not set");
}
// since we can't send a message only to the server, make sure we're the server
// when processing.
if (@delegate.IsServer)
{
// Check if player already owned a grabbable
// This is to filter tryGrab messages a player might send because it has not received grab message yet
foreach (var value in this.Grabbables.Values)
{
if (value.Player != null && value.Player == player)
{
return;
}
}
var grabbable = this.GrabbableById(data.GrabbableId);
this.GrabDelegate.OnServerGrab(grabbable, data.CameraInfo, player);
grabbable.Player = player;
// Inform player that the grabbable was grabbed
var newData = new GrabInfo(grabbable.GrabbableId, data.CameraInfo);
@delegate.DispatchToPlayer(new GameActionType {
GrabStart = newData, Type = GameActionType.GActionType.GrabStart
}, player);
// Update grabbable in the server and clients with a new status
// Note: status update only sends the information on whether
this.HandleGrabbableStatus(newData);
@delegate.ServerDispatchActionToAll(new GameActionType {
GrabbableStatus = newData, Type = GameActionType.GActionType.GrabbableStatus
});
}
}
private void HandleTryReleaseAction(GrabInfo data, Player player, IInteractionDelegate @delegate)
{
if (this.GrabDelegate == null)
{
throw new Exception("GrabDelegate not set");
}
if (this.Delegate.IsServer)
{
// Launch if player already grabbed a grabbable
var grabbable = this.GrabbableById(data.GrabbableId);
if (grabbable.IsGrabbed)
{
this.GrabDelegate.OnServerRelease(grabbable, data.CameraInfo, player);
// Inform player that the grabbable was grabbed
var newData = new GrabInfo(grabbable.GrabbableId, data.CameraInfo);
@delegate.DispatchToPlayer(new GameActionType {
ReleaseEnd = newData, Type = GameActionType.GActionType.ReleaseEnd
}, player);
}
}
}
private void HandleReleaseEndAction(GrabInfo data, Player player, IInteractionDelegate @delegate)
{
this.isTouching = false;
}