134 lines
4.4 KiB
GDScript
134 lines
4.4 KiB
GDScript
extends Node
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## In a multiplayer world: sends where you are, shows where everyone else is.
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## Added by world.gd when the game is connected to a server.
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##
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## - Your own movement stays instant (you move locally and tell the server).
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## The server checks each move; if it refuses one it sends you back to your
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## last good position.
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## - Other players are avatars (avatar.gd), drawn INTERP_DELAY behind the
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## server's clock and interpolated between its snapshots.
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## - The time of day follows the server, so everyone shares the same sky
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## (weather follows from the seed and the time).
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const AvatarScript = preload("res://scripts/net/avatar.gd")
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const INTERP_DELAY := 0.1
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var world: Node3D
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var player: CharacterBody3D
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var avatars: Dictionary = {} ## peer -> avatar.gd
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var corrections := 0
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var _send_left := 0.0
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var _offset := INF ## server time minus local time (smoothed)
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var _teleport_next := false
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var _root: Node3D
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func setup(w: Node3D) -> void:
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world = w
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player = w.player
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_root = Node3D.new()
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_root.name = "Avatars"
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w.add_child(_root)
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Net.snapshot.connect(_on_snapshot)
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Net.corrected.connect(_on_corrected)
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Net.clock.connect(_on_clock)
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Net.players_changed.connect(_sync_avatars)
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Net.player_joined.connect(func(n): Actions.notify.emit("%s joined" % n))
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Net.player_left.connect(func(n): Actions.notify.emit("%s left" % n))
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if Net.world_info.has("day"):
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_on_clock(int(Net.world_info.day), float(Net.world_info.time))
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func _exit_tree() -> void:
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for sig in [[Net.snapshot, _on_snapshot], [Net.corrected, _on_corrected], [Net.clock, _on_clock],
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[Net.players_changed, _sync_avatars]]:
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if (sig[0] as Signal).is_connected(sig[1]):
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(sig[0] as Signal).disconnect(sig[1])
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static func _now() -> float:
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return Time.get_ticks_msec() / 1000.0
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## Server time we draw other players at.
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func render_time() -> float:
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return _now() + _offset - INTERP_DELAY if _offset != INF else -INF
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## Flags the next update as a legitimate jump (respawning), so the server
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## checks it against the spawn instead of against walking speed.
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func mark_teleport() -> void:
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_teleport_next = true
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func _physics_process(delta: float) -> void:
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_send_left -= delta
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if _send_left > 0.0:
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return
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_send_left = Net.SEND_INTERVAL
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var cam: Camera3D = player.get_node("Camera3D")
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Net.send_state(player.global_position, player.rotation.y, cam.rotation.x, anim_state(), player.held_item_id(), _teleport_next)
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_teleport_next = false
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## What the local player is doing, for other people's view of them.
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func anim_state() -> int:
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if player.global_position.y < player.water_level - player.FLOAT_DEPTH + 0.1 and not player.is_on_floor():
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return AvatarScript.Anim.SWIM
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if not player.is_on_floor():
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return AvatarScript.Anim.AIR
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var flat := Vector2(player.velocity.x, player.velocity.z).length()
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if flat > 6.0:
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return AvatarScript.Anim.RUN
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if flat > 0.5:
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return AvatarScript.Anim.WALK
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return AvatarScript.Anim.IDLE
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func _process(delta: float) -> void:
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var rt := render_time()
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if rt == -INF:
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return
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for a in avatars.values():
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a.update_at(rt, delta)
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func _on_snapshot(t: float, states: Array) -> void:
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var sample := t - _now()
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# Smooth the clock offset so jitter doesn't make avatars judder. Jump
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# straight to it at first, or if it's way off (a long stall).
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if _offset == INF or absf(sample - _offset) > 1.0:
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_offset = sample
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else:
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_offset = lerpf(_offset, sample, 0.05)
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for s in states:
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var peer := int(s[0])
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if peer == Net.local_peer:
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continue
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var a: Node3D = avatars.get(peer)
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if a == null:
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a = _add_avatar(peer)
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if a == null:
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continue
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a.push(float(s[6]), s[1], s[2], s[3], s[4], s[5]) # stamped with when they moved, not when it was sent
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func _add_avatar(peer: int) -> Node3D:
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if not Net.players.has(peer):
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return null
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var a: Node3D = AvatarScript.new()
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a.setup(peer, Net.players[peer])
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_root.add_child(a)
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avatars[peer] = a
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return a
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func _sync_avatars() -> void:
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for peer in avatars.keys():
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if not Net.players.has(peer):
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avatars[peer].queue_free()
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avatars.erase(peer)
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func _on_corrected(pos: Vector3) -> void:
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corrections += 1
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player.global_position = pos
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player.velocity = Vector3.ZERO
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func _on_clock(day: int, time: float) -> void:
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world.day_night.day = day
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# Small drift: ease the clock across. A big gap (joining, a stall): jump.
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var diff := wrapf(time - world.day_night.time, -0.5, 0.5)
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if absf(diff) > 0.01:
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world.day_night.time = time
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world.day_night.apply(true)
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world.weather.snap() # (a night slept through: the weather jumps too)
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