Added player movement

client/character/Character.gd

@@ -11,11 +11,12 @@ const DECELERATE := 0.75
 var direction: Vector3
 var angle: float
 var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
+var controller: Node
 
 func _process(delta):
-	if direction:
+	if direction != Vector3.ZERO:
 		angle = atan2(direction.x, direction.z)
-
+	
 	model.rotation.y = lerp_angle(model.rotation.y, angle, rotation_speed * delta)
 
 func _physics_process(delta):

client/network/PlayerAdd.gd

@@ -21,13 +21,16 @@ func handle_packet(data: PackedByteArray, _peer: PacketPeer):
 
 	var player := spawn_player()
 	player.position = server_position
-	player.set_character_name(player_name)
+	player.set_character_name(player_id)
 
 	if player_id == Global.account_id:
 		Global.player = player
-		var controller := PlayerController.new()
-		controller.character = Global.player
-		Global.player.add_child(controller)
+		player.controller = PlayerController.new()
+	else:
+		player.controller = ProxyController.new()
+	
+	player.controller.character = player
+	player.add_child(player.controller)
 
 func spawn_player() -> Player:
 	var player = player_scene.instantiate()

client/network/PlayerMove.gd

@@ -0,0 +1,43 @@
+extends PacketHandler
+
+@export var delay := 50
+
+var last_sent := Time.get_ticks_msec()
+var last_sent_position := Vector3.ZERO
+
+func handle_packet(data: PackedByteArray, _peer: PacketPeer):
+	var buffer := StreamPeerBuffer.new()
+	buffer.data_array = data
+
+	var player_id_length := buffer.get_size() - 8
+	var player_id := buffer.get_string(player_id_length)
+	var x := buffer.get_float()
+	# var y := buffer.get_float()
+	var z := buffer.get_float()
+
+	var player := %Players.get_node(player_id)
+	var controller := player.controller as ProxyController
+	controller.server_position.x = x
+	controller.server_position.z = z
+
+func _physics_process(_delta):
+	if Global.player == null:
+		return
+	
+	if Global.player.position == last_sent_position:
+		return
+	
+	if Time.get_ticks_msec() < last_sent + delay:
+		return
+	
+	send_position()
+	last_sent = Time.get_ticks_msec()
+	last_sent_position = Global.player.position
+
+func send_position():
+	var buffer := StreamPeerBuffer.new()
+	buffer.put_8(PacketHandler.Packet.PLAYER_MOVE)
+	buffer.put_float(Global.player.position.x)
+	# buffer.put_float(Global.player.position.y)
+	buffer.put_float(Global.player.position.z)
+	%Client.socket.put_packet(buffer.data_array)

client/player/controller/ProxyController.gd

@@ -0,0 +1,22 @@
+class_name ProxyController
+extends Node
+
+## The character that we're controlling.
+@export var character: Character
+
+var server_position: Vector3
+
+func _ready():
+	server_position = character.position
+
+func _process(_delta):
+	var move := server_position - character.position
+	move.y = 0.0
+
+	if move.length_squared() < 0.01:
+		# character.position = server_position
+		character.direction = Vector3.ZERO
+		return
+	
+	character.direction = Vector3(move.x, 0, move.z)
+	character.direction = character.direction.normalized()

client/project.godot

@@ -21,6 +21,8 @@ Global="*res://Global.gd"
 
 [display]
 
+window/size/viewport_width=960
+window/size/viewport_height=540
 window/vsync/vsync_mode=0
 
 [gui]

client/world/Client.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=17 format=3 uid="uid://b40y7iuskv1ar"]
+[gd_scene load_steps=18 format=3 uid="uid://b40y7iuskv1ar"]
 
 [ext_resource type="Script" path="res://Game.gd" id="1_pux6q"]
 [ext_resource type="Script" path="res://network/Client.gd" id="2_1ofik"]
@@ -6,6 +6,7 @@
 [ext_resource type="Script" path="res://network/Login.gd" id="4_k8n1i"]
 [ext_resource type="Script" path="res://network/PlayerAdd.gd" id="5_1dcs7"]
 [ext_resource type="PackedScene" uid="uid://2lcnu3dy54lx" path="res://player/Player.tscn" id="5_22pku"]
+[ext_resource type="Script" path="res://network/PlayerMove.gd" id="7_rjgcp"]
 [ext_resource type="Environment" uid="uid://dixa0yso2s1u3" path="res://world/Environment.tres" id="8_5uta8"]
 [ext_resource type="CameraAttributesPractical" uid="uid://b835orxyqq6w5" path="res://camera/CameraAttributes.tres" id="9_w4cdu"]
 [ext_resource type="PackedScene" uid="uid://tgmbtt7u172g" path="res://world/Arena.blend" id="10_cje7b"]
@@ -39,6 +40,7 @@ packet_type = 1
 autostart = true
 
 [node name="Login" type="Node" parent="Client"]
+unique_name_in_owner = true
 script = ExtResource("4_k8n1i")
 packet_type = 2
 
@@ -51,6 +53,10 @@ script = ExtResource("5_1dcs7")
 player_scene = ExtResource("5_22pku")
 packet_type = 10
 
+[node name="PlayerMove" type="Node" parent="Client"]
+script = ExtResource("7_rjgcp")
+packet_type = 12
+
 [node name="World" type="Node3D" parent="."]
 
 [node name="Sun" type="DirectionalLight3D" parent="World"]
@@ -84,7 +90,7 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 7.00829, 1.28057, -1.95247)
 [node name="Slime3" parent="World/Enemies" instance=ExtResource("12_6yrwn")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8.53558, 1.28057, -0.306177)
 
-[node name="Players" type="Node3D" parent="World"]
+[node name="Players" type="Node3D" parent="."]
 unique_name_in_owner = true
 
 [node name="UI" parent="." instance=ExtResource("13_s76b0")]
@@ -100,7 +106,7 @@ stretch = true
 
 [node name="SubViewport" type="SubViewport" parent="Viewport"]
 handle_input_locally = false
-size = Vector2i(1152, 648)
+size = Vector2i(960, 540)
 render_target_update_mode = 4
 
 [node name="CameraPivot" type="Node3D" parent="Viewport/SubViewport"]

server/game/Game.go

@@ -41,6 +41,7 @@ func (game *Game) start() {
 func (game *Game) network() {
 	game.server.SetHandler(packet.Ping, game.Ping)
 	game.server.SetHandler(packet.Login, game.Login)
+	game.server.SetHandler(packet.PlayerMove, game.Move)
 	game.server.Run(4242)
 }
 

server/game/Login.go

@@ -3,7 +3,6 @@ package game
 import (
 	"crypto/rand"
 	"encoding/base64"
-	"encoding/binary"
 	"encoding/json"
 	"errors"
 	"net"
@@ -46,20 +45,14 @@ func (game *Game) Login(data []byte, address *net.UDPAddr, server *Server) error
 	player.KeepAlive()
 
 	response := []byte{Success}
-	response = appendString(response, account.ID)
-	response = appendString(response, player.authToken)
+	response = AppendString(response, account.ID)
+	response = AppendString(response, player.authToken)
 	server.Send(packet.Login, response, address)
 
 	game.onLogin(player)
 	return nil
 }
 
-func appendString(data []byte, str string) []byte {
-	data = binary.LittleEndian.AppendUint32(data, uint32(len(str)))
-	data = append(data, []byte(str)...)
-	return data
-}
-
 // Inform the newly logged in player about existing players.
 // Also inform existing players about the newly logged in player.
 func (game *Game) onLogin(player *Player) {

server/game/Move.go

@@ -0,0 +1,30 @@
+package game
+
+import (
+	"encoding/binary"
+	"math"
+	"net"
+	"server/game/packet"
+)
+
+// Move updates the location and direction the client is currently moving towards.
+func (game *Game) Move(data []byte, address *net.UDPAddr, server *Server) error {
+	player := game.players.Get(address)
+	player.Position.X = math.Float32frombits(binary.LittleEndian.Uint32(data))
+	player.Position.Z = math.Float32frombits(binary.LittleEndian.Uint32(data[4:]))
+
+	update := []byte(player.ID)
+	update = AppendFloat(update, player.Position.X)
+	update = AppendFloat(update, player.Position.Z)
+
+	game.players.Each(func(other *Player) bool {
+		if other == player {
+			return true
+		}
+
+		game.server.Send(packet.PlayerMove, update, other.address)
+		return true
+	})
+
+	return nil
+}

server/game/Player.go

@@ -40,9 +40,9 @@ func (c *Player) Tick() {
 // State returns the player state (ID, name and position).
 func (player *Player) State() []byte {
 	state := []byte{}
-	state = appendString(state, player.ID)
-	state = appendString(state, player.Name)
-	state = appendVector3(state, player.Position)
+	state = AppendString(state, player.ID)
+	state = AppendString(state, player.Name)
+	state = AppendVector3(state, player.Position)
 	return state
 }
 

server/game/String.go

@@ -0,0 +1,10 @@
+package game
+
+import "encoding/binary"
+
+// AppendString appends the length of the string followed by its contents.
+func AppendString(data []byte, str string) []byte {
+	data = binary.LittleEndian.AppendUint32(data, uint32(len(str)))
+	data = append(data, []byte(str)...)
+	return data
+}

server/game/Vector3.go

@@ -12,8 +12,8 @@ type Vector3 struct {
 	Z float32 `json:"z"`
 }
 
-// appendVector3 adds the raw bits of the vector to the given byte slice in XYZ order.
-func appendVector3(data []byte, vector Vector3) []byte {
+// AppendVector3 appends the raw bits of the vector to the given byte slice in XYZ order.
+func AppendVector3(data []byte, vector Vector3) []byte {
 	bits := math.Float32bits(vector.X)
 	data = binary.LittleEndian.AppendUint32(data, bits)
 
@@ -23,3 +23,17 @@ func appendVector3(data []byte, vector Vector3) []byte {
 	bits = math.Float32bits(vector.Z)
 	return binary.LittleEndian.AppendUint32(data, bits)
 }
+
+// AppendFloat appends the raw bits of the float to the given byte slice in XYZ order.
+func AppendFloat(data []byte, value float32) []byte {
+	bits := math.Float32bits(value)
+	return binary.LittleEndian.AppendUint32(data, bits)
+}
+
+func Vector3FromBytes(data []byte) Vector3 {
+	return Vector3{
+		X: math.Float32frombits(binary.LittleEndian.Uint32(data)),
+		Y: math.Float32frombits(binary.LittleEndian.Uint32(data[4:])),
+		Z: math.Float32frombits(binary.LittleEndian.Uint32(data[8:])),
+	}
+}