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118 lines
2.8 KiB
118 lines
2.8 KiB
3 weeks ago
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extends CharacterBody3D
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class_name BaseUnit
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## Base class for all units (players, enemies, NPCs) in the game
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## Provides common functionality like health management and taking damage
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signal health_changed(old_health: float, new_health: float)
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signal died(killer_id: int)
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signal respawned()
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@export var max_health: float = 100.0
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@export var can_respawn: bool = true
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@export var respawn_delay: float = 3.0
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var current_health: float = 100.0
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var is_dead: bool = false
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var _respawn_point: Vector3 = Vector3.ZERO
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func _ready():
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current_health = max_health
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_respawn_point = global_position
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func _enter_tree():
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set_multiplayer_authority(str(name).to_int())
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## Take damage from an attacker
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## Should only be called on the server for authority
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@rpc("any_peer", "reliable")
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func take_damage(amount: float, attacker_id: int = -1):
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# Only server can process damage
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if not multiplayer.is_server():
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return
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if is_dead:
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return
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var old_health = current_health
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current_health = max(0, current_health - amount)
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# Broadcast health change to all clients
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rpc("sync_health", current_health)
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health_changed.emit(old_health, current_health)
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if current_health <= 0:
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_die(attacker_id)
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## Heal the unit
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@rpc("any_peer", "reliable")
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func heal(amount: float):
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if not multiplayer.is_server():
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return
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if is_dead:
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return
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var old_health = current_health
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current_health = min(max_health, current_health + amount)
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rpc("sync_health", current_health)
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health_changed.emit(old_health, current_health)
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## Sync health across all clients
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@rpc("any_peer", "call_local", "reliable")
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func sync_health(new_health: float):
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var old_health = current_health
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current_health = new_health
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health_changed.emit(old_health, current_health)
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## Handle death
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func _die(killer_id: int):
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if is_dead:
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return
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is_dead = true
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died.emit(killer_id)
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rpc("sync_death", killer_id)
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if can_respawn and multiplayer.is_server():
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await get_tree().create_timer(respawn_delay).timeout
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_respawn()
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## Sync death state to all clients
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@rpc("any_peer", "call_local", "reliable")
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func sync_death(killer_id: int):
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is_dead = true
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died.emit(killer_id)
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# Subclasses should override to add visual effects, disable collision, etc.
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## Respawn the unit
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func _respawn():
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if not multiplayer.is_server():
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return
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is_dead = false
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current_health = max_health
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global_position = _respawn_point
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velocity = Vector3.ZERO
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rpc("sync_respawn", _respawn_point)
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respawned.emit()
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## Sync respawn to all clients
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@rpc("any_peer", "call_local", "reliable")
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func sync_respawn(spawn_pos: Vector3):
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is_dead = false
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current_health = max_health
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global_position = spawn_pos
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velocity = Vector3.ZERO
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respawned.emit()
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## Set the respawn point
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func set_respawn_point(point: Vector3):
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_respawn_point = point
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## Get health percentage (0.0 to 1.0)
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func get_health_percent() -> float:
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return current_health / max_health if max_health > 0 else 0.0
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