bot can hear sounds now. add some motion API.

bot/event.go

@@ -6,8 +6,9 @@ import (
 
 type eventBroker struct {
 	GameStart    func() error
-	ChatMsg      func(msg chat.Message) error
+	ChatMsg      func(msg chat.Message, pos byte) error
 	Disconnect   func(reason chat.Message) error
 	HealhtChange func() error
 	Die          func() error
+	SoundPlay    func(name string, category int, x, y, z float64, volume, pitch float32) error
 }

bot/ingame.go

@@ -105,48 +105,59 @@ func (c *Client) handlePacket(p pk.Packet) (disconnect bool, err error) {
 		disconnect = true
 	case 0x16:
 	// 	err = handleSetSlotPacket(g, reader)
-	case 0x51:
-		// err = handleSoundEffect(g, reader)
+	case data.SoundEffect:
+		err = handleSoundEffect(c, p)
+	case data.NamedSoundEffect:
+		err = handleNamedSoundEffect(c, p)
 	default:
 		// fmt.Printf("ignore pack id %X\n", p.ID)
 	}
 	return
 }
 
-// func handleSoundEffect(g *Client, r *bytes.Reader) error {
-// 	SoundID, err := pk.UnpackVarInt(r)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	SoundCategory, err := pk.UnpackVarInt(r)
-// 	if err != nil {
-// 		return err
-// 	}
+func handleSoundEffect(c *Client, p pk.Packet) error {
+	var (
+		SoundID       pk.VarInt
+		SoundCategory pk.VarInt
+		x, y, z       pk.Int
+		Volume, Pitch pk.Float
+	)
+	err := p.Scan(&SoundID, &SoundCategory, &x, &y, &z, &Volume, &Pitch)
+	if err != nil {
+		return err
+	}
 
-// 	x, err := pk.UnpackInt32(r)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	y, err := pk.UnpackInt32(r)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	z, err := pk.UnpackInt32(r)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	Volume, err := pk.UnpackFloat(r)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	Pitch, err := pk.UnpackFloat(r)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	g.events <- SoundEffectEvent{SoundID, SoundCategory, float64(x) / 8, float64(y) / 8, float64(z) / 8, Volume, Pitch}
+	if c.Events.SoundPlay != nil {
+		c.Events.SoundPlay(
+			data.SoundNames[SoundID], int(SoundCategory),
+			float64(x)/8, float64(y)/8, float64(z)/8,
+			float32(Volume), float32(Pitch))
+	}
 
-// 	return nil
-// }
+	return nil
+}
+
+func handleNamedSoundEffect(c *Client, p pk.Packet) error {
+	var (
+		SoundName     pk.String
+		SoundCategory pk.VarInt
+		x, y, z       pk.Int
+		Volume, Pitch pk.Float
+	)
+	err := p.Scan(&SoundName, &SoundCategory, &x, &y, &z, &Volume, &Pitch)
+	if err != nil {
+		return err
+	}
+
+	if c.Events.SoundPlay != nil {
+		c.Events.SoundPlay(
+			string(SoundName), int(SoundCategory),
+			float64(x)/8, float64(y)/8, float64(z)/8,
+			float32(Volume), float32(Pitch))
+	}
+
+	return nil
+}
 
 func handleDisconnectPacket(c *Client, p pk.Packet) error {
 	var reason chat.Message
@@ -262,7 +273,7 @@ func handleChatMessagePacket(c *Client, p pk.Packet) (err error) {
 	}
 
 	if c.Events.ChatMsg != nil {
-		err = c.Events.ChatMsg(s)
+		err = c.Events.ChatMsg(s, byte(pos))
 	}
 
 	return err

bot/motion.go

@@ -1,12 +1,13 @@
 package bot
 
 import (
+	"fmt"
 	"github.com/Tnze/go-mc/data"
 	pk "github.com/Tnze/go-mc/net/packet"
 )
 
 //SwingArm swing player's arm.
-//hand could be 0: main hand, 1: off hand
+//hand could be one of 0: main hand, 1: off hand
 func (c *Client) SwingArm(hand int) error {
 	return c.conn.WritePacket(pk.Marshal(
 		data.AnimationServerbound,
@@ -22,9 +23,23 @@ func (c *Client) Respawn() error {
 	))
 }
 
+//UseItem use the item player handing.
+//hand could be one of 0: main hand, 1: off hand
 func (c *Client) UseItem(hand int) error {
 	return c.conn.WritePacket(pk.Marshal(
 		data.UseItem,
 		pk.VarInt(hand),
 	))
 }
+
+//Chat send chat as chat message or command at textbox.
+func (c *Client) Chat(msg string) error {
+	if len(msg) > 256 {
+		return fmt.Errorf("message too long")
+	}
+
+	return c.conn.WritePacket(pk.Marshal(
+		data.ChatMessageServerbound,
+		pk.String(msg),
+	))
+}