73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
|
package entity
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/df-mc/dragonfly/server/world"
|
||
|
|
"math"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// StationaryBehaviourConfig holds settings that influence the way
|
||
|
|
// StationaryBehaviour operates. StationaryBehaviourConfig.New() may be called
|
||
|
|
// to create a new behaviour with this config.
|
||
|
|
type StationaryBehaviourConfig struct {
|
||
|
|
// ExistenceDuration is the duration that an entity with this behaviour
|
||
|
|
// should last. Once this time expires, the entity is closed. If
|
||
|
|
// ExistenceDuration is 0, the entity will never expire automatically.
|
||
|
|
ExistenceDuration time.Duration
|
||
|
|
// SpawnSounds is a slice of sounds to be played upon the spawning of the
|
||
|
|
// entity.
|
||
|
|
SpawnSounds []world.Sound
|
||
|
|
// Tick is a function called every world tick. It may be used to implement
|
||
|
|
// additional behaviour for stationary entities.
|
||
|
|
Tick func(e *Ent, tx *world.Tx)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (conf StationaryBehaviourConfig) Apply(data *world.EntityData) {
|
||
|
|
data.Data = conf.New()
|
||
|
|
}
|
||
|
|
|
||
|
|
// New creates a StationaryBehaviour using the settings provided in conf.
|
||
|
|
func (conf StationaryBehaviourConfig) New() *StationaryBehaviour {
|
||
|
|
if conf.ExistenceDuration == 0 {
|
||
|
|
conf.ExistenceDuration = math.MaxInt64
|
||
|
|
}
|
||
|
|
return &StationaryBehaviour{conf: conf}
|
||
|
|
}
|
||
|
|
|
||
|
|
// StationaryBehaviour implements the behaviour of an entity that is unable to
|
||
|
|
// move, such as a text entity or an area effect cloud. Applying velocity to
|
||
|
|
// such entities will not move them.
|
||
|
|
type StationaryBehaviour struct {
|
||
|
|
conf StationaryBehaviourConfig
|
||
|
|
close bool
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tick checks if the entity should be closed and runs whatever additional
|
||
|
|
// behaviour the entity might require.
|
||
|
|
func (s *StationaryBehaviour) Tick(e *Ent, tx *world.Tx) *Movement {
|
||
|
|
if s.close {
|
||
|
|
_ = e.Close()
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
if e.Age() == 0 {
|
||
|
|
for _, ss := range s.conf.SpawnSounds {
|
||
|
|
tx.PlaySound(e.Position(), ss)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if s.conf.Tick != nil {
|
||
|
|
s.conf.Tick(e, tx)
|
||
|
|
}
|
||
|
|
|
||
|
|
if e.Age() > s.conf.ExistenceDuration {
|
||
|
|
s.close = true
|
||
|
|
}
|
||
|
|
// Stationary entities never move. Always return nil here.
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Immobile always returns true.
|
||
|
|
func (s *StationaryBehaviour) Immobile() bool {
|
||
|
|
return true
|
||
|
|
}
|