func TestService_Rewind(t *testing.T) {
s := entity.NewService()
f := s.Frontend()
// Accept all requests
go (func() {
for {
var req entity.Request
select {
case req = <-f.Creates:
case req = <-f.Updates:
case req = <-f.Deletes:
}
s.AcceptRequest(req)
}
})()
t0 := message.AbsoluteTick(1)
// Create a new entity
ent := message.NewEntity()
ent.Position.X = 10
ent.Position.Y = 15
req := f.Add(ent, t0)
req.Wait()
created := req.(*entity.CreateRequest)
id := created.Entity.Id
if id == 0 {
t.Fatal("Entity doesn't have an id after being added")
}
ent0 := s.Get(id)
t1 := t0 + 5
// Update the entity
update := message.NewEntity()
update.Id = id
update.Position.X = 33
update.Position.Y = 15
diff := &message.EntityDiff{Position: true}
req = f.Update(update, diff, t1)
req.Wait()
// Rewind
err := s.Rewind(s.GetTick() - t0)
if err != nil {
t.Fatal(err)
}
rewindEnt := s.Get(id)
if rewindEnt.Position.X != ent0.Position.X {
t.Fatal("Invalid rewind, expected position", ent0.Position.X, "but got", rewindEnt.Position.X)
}
}
func New(srv *server.Server, timeSrv *timeserver.Server) *Engine {
// Create a new context
ctx := message.NewServerContext()
// Create the engine
e := &Engine{
ctx: ctx,
srv: srv,
timeSrv: timeSrv,
auth: auth.NewService(),
clock: clock.NewService(),
entity: entity.NewService(),
action: action.NewService(),
terrain: terrain.New(),
config: game.DefaultConfig(),
clients: make(map[int]*server.Client),
brdStop: make(chan bool),
listenStop: make(chan bool),
listenTimeStop: make(chan bool),
}
// Set config
if timeSrv != nil {
e.config.TimeServerPort = uint16(timeSrv.Port())
}
// Populate context
ctx.Auth = e.auth
ctx.Entity = e.entity.Frontend()
ctx.Action = e.action.Frontend()
ctx.Terrain = e.terrain
ctx.Clock = e.clock
ctx.Config = e.config
// Initialize engine submodules
e.mover = NewMover(e)
// Set callbacks
e.auth.LoginCallback = func(session *message.Session) {
entity := session.Entity
// Populate entity
// TODO: default values are hardcoded
entity.Position.BX = 20
entity.Position.BY = 20
entity.Type = game.PlayerEntity
entity.Sprite = game.PlayerSprite
entity.Attributes[game.HealthAttr] = game.Health(1000)
entity.Attributes[game.CooldownOneAttr] = game.Cooldown(0)
}
return e
}