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