215 lines
8.4 KiB
GDScript
215 lines
8.4 KiB
GDScript
extends Node
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const PROJECTILE_SCENE := preload("res://scenes/game/weapon_projectile.tscn")
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const IMPACT_EFFECT_SCENE := preload("res://scenes/game/impact_effect.tscn")
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const WEAPON_AUDIO_SCRIPT := preload("res://scripts/game/weapon_audio.gd")
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const RAY_COLLISION_MASK := 13 # World, enemies, and the weapon test target.
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@onready var ship: CharacterBody2D = get_parent()
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@onready var inventory: ShipInventory = ship.get_node("ShipInventory")
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var _shot_timers := [0.0, 0.0, 0.0]
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var _laser_pulse_timers := [0.0, 0.0, 0.0]
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var _laser_lines: Array[Line2D] = []
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var _fire_buttons_down := [false, false, false]
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var _fire_just_pressed := [false, false, false]
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var _drag_fire_blocked := false
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var missile_cooldown_remaining := 0.0
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var missile_cooldown_duration := 5.0
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func _ready() -> void:
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_ensure_input_action(&"ship_fire_primary", MOUSE_BUTTON_LEFT)
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_ensure_input_action(&"ship_fire_secondary", MOUSE_BUTTON_RIGHT)
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_ensure_input_action(&"ship_fire_missile", MOUSE_BUTTON_MIDDLE)
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for slot_index in ShipInventory.WEAPON_SLOT_COUNT:
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var beam := Line2D.new()
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beam.width = 4.0
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beam.default_color = Color(0.35, 0.9, 1.0, 0.92)
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beam.z_index = 20
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beam.visible = false
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ship.get_parent().call_deferred("add_child", beam)
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_laser_lines.append(beam)
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func _ensure_input_action(action_name: StringName, button: MouseButton) -> void:
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if not InputMap.has_action(action_name):
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InputMap.add_action(action_name, 0.5)
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var event := InputEventMouseButton.new()
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event.button_index = button
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if not InputMap.action_has_event(action_name, event):
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InputMap.action_add_event(action_name, event)
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func _unhandled_input(event: InputEvent) -> void:
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if not event is InputEventMouseButton:
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return
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if ship.get_viewport().gui_is_dragging() or _drag_fire_blocked:
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return
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var slot_index := -1
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if event.button_index == MOUSE_BUTTON_MIDDLE:
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slot_index = 2
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if event.button_index == MOUSE_BUTTON_LEFT:
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slot_index = 0
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elif event.button_index == MOUSE_BUTTON_RIGHT:
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slot_index = 1
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if slot_index < 0:
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return
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_fire_buttons_down[slot_index] = event.pressed
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if event.pressed:
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_fire_just_pressed[slot_index] = true
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func _physics_process(delta: float) -> void:
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missile_cooldown_remaining = maxf(0.0, missile_cooldown_remaining - delta)
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if ship.get_viewport().gui_is_dragging():
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_drag_fire_blocked = true
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if _drag_fire_blocked:
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for index in ShipInventory.WEAPON_SLOT_COUNT:
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_fire_buttons_down[index] = false
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_fire_just_pressed[index] = false
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_laser_pulse_timers[index] = 0.0
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_laser_lines[index].visible = false
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_shot_timers[index] = maxf(0.0, _shot_timers[index] - delta)
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# Require release after dropping, so the drag gesture cannot become a shot.
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if not ship.get_viewport().gui_is_dragging() and not Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT) and not Input.is_mouse_button_pressed(MOUSE_BUTTON_RIGHT) and not Input.is_mouse_button_pressed(MOUSE_BUTTON_MIDDLE):
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_drag_fire_blocked = false
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return
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if bool(ship.get("_is_destroyed")) or bool(ship.get("is_docked")):
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for line in _laser_lines:
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line.visible = false
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return
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var mouse_over_ui := ship.get_viewport().gui_get_hovered_control() != null
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for slot_index in ShipInventory.WEAPON_SLOT_COUNT:
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_shot_timers[slot_index] = maxf(0.0, _shot_timers[slot_index] - delta)
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_laser_pulse_timers[slot_index] = maxf(0.0, _laser_pulse_timers[slot_index] - delta)
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var action_name: String = ["ship_fire_primary", "ship_fire_secondary", "ship_fire_missile"][slot_index]
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var is_pressed: bool = not mouse_over_ui and (
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Input.is_action_pressed(action_name) or _fire_buttons_down[slot_index]
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)
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var is_just_pressed: bool = not mouse_over_ui and (
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Input.is_action_just_pressed(action_name) or _fire_just_pressed[slot_index]
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)
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var item: ItemInstance = inventory.weapon_slots[slot_index]
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if not is_pressed or item == null or item.definition == null:
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_laser_lines[slot_index].visible = (
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item != null
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and item.definition != null
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and item.definition.weapon_kind == ItemDefinition.WeaponKind.LASER
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and _laser_pulse_timers[slot_index] > 0.0
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)
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continue
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var definition := item.definition
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if definition.weapon_kind != ItemDefinition.WeaponKind.LASER:
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_laser_pulse_timers[slot_index] = 0.0
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_laser_lines[slot_index].visible = false
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match definition.weapon_kind:
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ItemDefinition.WeaponKind.LASER:
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_laser_lines[slot_index].visible = _laser_pulse_timers[slot_index] > 0.0
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_fire_laser(slot_index, item)
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ItemDefinition.WeaponKind.MISSILE:
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if is_just_pressed:
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try_fire_missile(slot_index)
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_:
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if _shot_timers[slot_index] <= 0.0 and _consume_shot_resource(item):
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_fire_projectile(item)
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_shot_timers[slot_index] = definition.fire_interval
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for slot_index in ShipInventory.WEAPON_SLOT_COUNT:
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_fire_just_pressed[slot_index] = false
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func try_fire_missile(slot_index: int = 2) -> bool:
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if missile_cooldown_remaining > 0.0 or bool(ship.get("_is_destroyed")) or bool(ship.get("is_docked")):
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return false
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var item := inventory.get_item("weapon", slot_index)
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if item == null or item.definition.weapon_kind != ItemDefinition.WeaponKind.MISSILE:
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return false
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if inventory.missile_ammunition <= 0:
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return false
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missile_cooldown_duration = inventory.get_missile_cooldown(item)
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_fire_projectile(item)
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missile_cooldown_remaining = missile_cooldown_duration
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inventory.consume_missile()
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return true
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func _fire_projectile(item: ItemInstance) -> void:
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var definition := item.definition
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var hit: Dictionary = ship.call("roll_weapon_hit", item)
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var muzzle_position := _muzzle_position()
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var direction := _aim_direction_from(muzzle_position)
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var projectile := PROJECTILE_SCENE.instantiate()
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projectile.call(
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"configure",
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muzzle_position,
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direction,
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definition.weapon_kind,
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definition.projectile_speed,
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float(hit["damage"]),
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definition.weapon_range,
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null,
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bool(hit["critical"])
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)
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ship.get_parent().add_child(projectile)
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projectile.set("missile_homing", definition.missile_homing)
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WEAPON_AUDIO_SCRIPT.play(ship.get_parent(), muzzle_position, definition.weapon_kind)
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func _fire_laser(slot_index: int, item: ItemInstance) -> void:
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var definition := item.definition
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var line := _laser_lines[slot_index]
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if _shot_timers[slot_index] > 0.0 or float(ship.get("energy")) < item.get_energy_cost():
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return
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var muzzle_position := _muzzle_position()
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var direction := _aim_direction_from(muzzle_position)
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var endpoint := muzzle_position + direction * definition.weapon_range
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var query := PhysicsRayQueryParameters2D.create(
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muzzle_position,
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endpoint,
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RAY_COLLISION_MASK,
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[ship.get_rid()]
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)
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var result := ship.get_world_2d().direct_space_state.intersect_ray(query)
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if not result.is_empty():
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endpoint = result["position"]
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line.clear_points()
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line.add_point(muzzle_position)
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line.add_point(endpoint)
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line.visible = true
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if not _consume_energy(item.get_energy_cost()):
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line.visible = false
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return
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WEAPON_AUDIO_SCRIPT.play(ship.get_parent(), muzzle_position, ItemDefinition.WeaponKind.LASER)
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if not result.is_empty():
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var hit: Dictionary = ship.call("roll_weapon_hit", item)
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_apply_damage(result.get("collider"), float(hit["damage"]), bool(hit["critical"]))
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_spawn_laser_impact(endpoint)
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_laser_pulse_timers[slot_index] = definition.laser_pulse_duration
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_shot_timers[slot_index] = definition.fire_interval
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func _aim_direction_from(origin: Vector2) -> Vector2:
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var offset := ship.get_global_mouse_position() - origin
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return offset.normalized() if offset.length_squared() > 0.001 else Vector2.UP.rotated(ship.rotation)
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func _muzzle_position() -> Vector2:
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var forward := Vector2.UP.rotated(ship.rotation)
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return ship.global_position + forward * 28.0
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func _consume_shot_resource(item: ItemInstance) -> bool:
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if item.definition.weapon_kind == ItemDefinition.WeaponKind.MACHINE_GUN:
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return inventory.consume_ammunition()
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return _consume_energy(item.get_energy_cost())
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func _consume_energy(amount: float) -> bool:
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var current_energy := float(ship.get("energy"))
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if current_energy < amount:
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return false
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ship.set("energy", current_energy - amount)
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return true
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func _apply_damage(target: Variant, damage: float, critical: bool = false) -> void:
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if target is Node and target.has_method("take_weapon_hit"):
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target.call("take_weapon_hit", damage, critical)
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elif target is Node and target.has_method("take_damage"):
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target.call("take_damage", damage)
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func _spawn_laser_impact(at_position: Vector2) -> void:
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var effect := IMPACT_EFFECT_SCENE.instantiate() as Node2D
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effect.global_position = at_position
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ship.get_parent().add_child(effect)
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effect.call("configure", false, Color(0.38, 0.9, 1.0))
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