add player position and look packet

pkg/edition/java/proto/packet/packet_test.go

@@ -65,6 +65,11 @@ var packets = []proto.Packet{
 		Url:    "https://example.com/",
 		Prompt: &component.Text{Content: "Prompt"},
 	},
+	&PlayerPosAndLook{
+		X: 30,
+		Y: 20,
+		Z: -5,
+	},
 	&Respawn{},
 	&StatusRequest{},
 	&StatusResponse{},

pkg/edition/java/proto/packet/pos-and-look.go

@@ -0,0 +1,95 @@
+package packet
+
+import (
+	"go.minekube.com/gate/pkg/edition/java/proto/util"
+	"go.minekube.com/gate/pkg/gate/proto"
+	"io"
+)
+
+// PlayerPosAndLook 0x38 sets player position and look direction.
+// dismisses the "loading terrain" when connecting.
+// pos is absolute or relative depending on the flags
+type PlayerPosAndLook struct {
+	X     float64
+	Y     float64
+	Z     float64
+	Yaw   float32
+	Pitch float32
+
+	// Flags is a bit field, for controlling if value is relative
+	// X/Y/Z/Y_ROT/X_ROT
+	// X: 0x01, Y: 0x02, Z: 0x04, Y_ROT 0x08, X_ROT 0x10
+	Flags byte
+
+	// TeleportID (varint) is the teleport identifier
+	// If set, should follow this up with a "TeleportConfirm"
+	TeleportID int
+	// DismountVehicle indicates player should dismount their vehicle
+	DismountVehicle bool
+}
+
+func (r *PlayerPosAndLook) Encode(c *proto.PacketContext, wr io.Writer) (err error) {
+	if err := util.WriteFloat64(wr, r.X); err != nil {
+		return err
+	}
+	if err := util.WriteFloat64(wr, r.Y); err != nil {
+		return err
+	}
+	if err := util.WriteFloat64(wr, r.Z); err != nil {
+		return err
+	}
+	if err := util.WriteFloat32(wr, r.Yaw); err != nil {
+		return err
+	}
+	if err := util.WriteFloat32(wr, r.Pitch); err != nil {
+		return err
+	}
+	if err := util.WriteByte(wr, r.Flags); err != nil {
+		return err
+	}
+	if err := util.WriteVarInt(wr, r.TeleportID); err != nil {
+		return err
+	}
+	if err := util.WriteBool(wr, r.DismountVehicle); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (r *PlayerPosAndLook) Decode(c *proto.PacketContext, rd io.Reader) (err error) {
+	r.X, err = util.ReadFloat64(rd)
+	if err != nil {
+		return err
+	}
+	r.Y, err = util.ReadFloat64(rd)
+	if err != nil {
+		return err
+	}
+	r.Z, err = util.ReadFloat64(rd)
+	if err != nil {
+		return err
+	}
+	r.Yaw, err = util.ReadFloat32(rd)
+	if err != nil {
+		return err
+	}
+	r.Pitch, err = util.ReadFloat32(rd)
+	if err != nil {
+		return err
+	}
+	r.Flags, err = util.ReadByte(rd)
+	if err != nil {
+		return err
+	}
+	r.TeleportID, err = util.ReadVarInt(rd)
+	if err != nil {
+		return err
+	}
+	r.DismountVehicle, err = util.ReadBool(rd)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+var _ proto.Packet = (*PlayerPosAndLook)(nil)

pkg/edition/java/proto/state/states.go

@@ -125,6 +125,9 @@ func init() {
 		m(0x24, version.Minecraft_1_16_2),
 		m(0x26, version.Minecraft_1_17),
 	)
+	Play.ClientBound.Register(&p.PlayerPosAndLook{},
+		m(0x38, version.Minecraft_1_17),
+	)
 	Play.ClientBound.Register(&p.Respawn{},
 		m(0x07, version.Minecraft_1_7_2),
 		m(0x33, version.Minecraft_1_9),