up3

server/entity/ender_pearl.go

@@ -0,0 +1,61 @@
+package entity
+
+import (
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/block/cube/trace"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/df-mc/dragonfly/server/world/particle"
+	"github.com/df-mc/dragonfly/server/world/sound"
+	"github.com/go-gl/mathgl/mgl64"
+)
+
+// NewEnderPearl creates an EnderPearl entity. EnderPearl is a smooth, greenish-
+// blue item used to teleport.
+func NewEnderPearl(opts world.EntitySpawnOpts, owner world.Entity) *world.EntityHandle {
+	conf := enderPearlConf
+	conf.Owner = owner.H()
+	return opts.New(EnderPearlType, conf)
+}
+
+var enderPearlConf = ProjectileBehaviourConfig{
+	Gravity:  0.03,
+	Drag:     0.01,
+	Particle: particle.EndermanTeleport{},
+	Sound:    sound.Teleport{},
+	Hit:      teleport,
+}
+
+// teleporter represents a living entity that can teleport.
+type teleporter interface {
+	// Teleport teleports the entity to the position given.
+	Teleport(pos mgl64.Vec3)
+	Living
+}
+
+// teleport teleports the owner of an Ent to a trace.Result's position.
+func teleport(e *Ent, tx *world.Tx, target trace.Result) {
+	owner, _ := e.Behaviour().(*ProjectileBehaviour).Owner().Entity(tx)
+	if user, ok := owner.(teleporter); ok {
+		tx.PlaySound(user.Position(), sound.Teleport{})
+		user.Teleport(target.Position())
+		user.Hurt(5, FallDamageSource{})
+	}
+}
+
+// EnderPearlType is a world.EntityType implementation for EnderPearl.
+var EnderPearlType enderPearlType
+
+type enderPearlType struct{}
+
+func (t enderPearlType) Open(tx *world.Tx, handle *world.EntityHandle, data *world.EntityData) world.Entity {
+	return &Ent{tx: tx, handle: handle, data: data}
+}
+
+func (enderPearlType) EncodeEntity() string { return "minecraft:ender_pearl" }
+func (enderPearlType) BBox(world.Entity) cube.BBox {
+	return cube.Box(-0.125, 0, -0.125, 0.125, 0.25, 0.125)
+}
+func (enderPearlType) DecodeNBT(_ map[string]any, data *world.EntityData) {
+	data.Data = enderPearlConf.New()
+}
+func (enderPearlType) EncodeNBT(*world.EntityData) map[string]any { return nil }