feat: added grapple mechanic

debug/test_level_builder.gd

@@ -478,6 +478,7 @@ func _build_hud() -> void:
 	wp_style.content_margin_right = 16
 	wp_style.content_margin_bottom = 12
 	wp_panel.add_theme_stylebox_override("panel", wp_style)
+	wp_panel.grow_horizontal = Control.GROW_DIRECTION_BEGIN
 	canvas.add_child(wp_panel)
 	
 	_weapon_label = Label.new()

globals/settings_manager.gd

@@ -8,6 +8,7 @@ var default_bindings = {
 	"dash": {"type": "key", "code": KEY_SHIFT},
 	"fire": {"type": "mouse", "code": MOUSE_BUTTON_LEFT},
 	"fire_alt": {"type": "mouse", "code": MOUSE_BUTTON_RIGHT},
+	"grapple": {"type": "mouse", "code": MOUSE_BUTTON_MIDDLE},
 	"reload": {"type": "key", "code": KEY_R},
 	"interact": {"type": "key", "code": KEY_E},
 	"move_forward": {"type": "key", "code": KEY_W},

movement/movement_params.gd

@@ -57,6 +57,13 @@ class_name MovementParams
 @export var wall_cling_stamina_drain: float = 2.0
 @export var wall_cling_max_stamina: float = 2.0
 
+# ── Grapple ───────────────────────────────────────────────────────────────────
+@export var grapple_range: float = 30.0
+@export var grapple_pull_force: float = 25.0
+@export var grapple_jump_boost: float = 12.0
+@export var grapple_spring_strength: float = 10.0
+@export var grapple_air_control: float = 20.0
+
 # ── Dash ──────────────────────────────────────────────────────────────────────
 @export var dash_speed: float = 10.0
 @export var dash_duration: float = 0.25

movement/movement_state_machine.gd

@@ -20,6 +20,15 @@ var input_jump_pressed: bool = false
 var input_jump_just_pressed: bool = false
 var input_crouch: bool = false
 var input_dash: bool = false
+var input_grapple: bool = false
+var input_grapple_just_pressed: bool = false
+
+# Grapple state
+var grapple_point: Vector3 = Vector3.ZERO
+var grapple_length: float = 0.0
+var grapple_travel_time: float = 0.0
+var grapple_shoot_time: float = 0.0
+var is_grapple_shooting: bool = false
 
 # ── State tracking ────────────────────────────────────────────────────────────
 var wall_normal: Vector3 = Vector3.ZERO
@@ -40,6 +49,12 @@ var is_crouched: bool = false
 
 
 func _ready() -> void:
+	# Ensure grapple state is injected
+	var grapple_state = Node.new()
+	grapple_state.name = "state_grapple"
+	grapple_state.set_script(load("res://movement/states/state_grapple.gd"))
+	add_child(grapple_state)
+
 	for child in get_children():
 		if child is Node and child.name.begins_with("state_"):
 			states[child.name.replace("state_", "")] = child
@@ -72,6 +87,17 @@ func _physics_process(delta: float) -> void:
 			chain_count = 0
 			current_chain_bonus = 0.0
 
+	# Global grapple check: if just pressed, raycast from camera
+	if input_grapple_just_pressed and current_state != "grapple" and not is_grapple_shooting:
+		_try_start_grapple()
+
+	if is_grapple_shooting:
+		grapple_shoot_time += delta
+		if grapple_shoot_time >= grapple_travel_time:
+			is_grapple_shooting = false
+			movement_event.emit("grapple_latch", {})
+			switch_to("grapple")
+
 	# Manage global crouch state
 	var want_crouch = input_crouch
 	if current_state == "slide":
@@ -117,6 +143,27 @@ func switch_to(new_state_name: String, data: Dictionary = {}) -> void:
 	state_changed.emit(prev, new_state_name)
 
 
+func _try_start_grapple() -> void:
+	if not player or not player.camera:
+		return
+	var camera: Camera3D = player.camera
+	var space_state := player.get_world_3d().direct_space_state
+	var origin := camera.global_position
+	var end := origin - camera.global_transform.basis.z * params.grapple_range
+	var ray := PhysicsRayQueryParameters3D.create(origin, end)
+	ray.exclude = [player.get_rid()]
+	var hit := space_state.intersect_ray(ray)
+	if not hit.is_empty():
+		grapple_point = hit.position
+		grapple_length = origin.distance_to(grapple_point)
+		
+		# Travel at 45 m/s
+		grapple_travel_time = grapple_length / 45
+		grapple_shoot_time = 0.0
+		is_grapple_shooting = true
+		movement_event.emit("grapple_shoot", {})
+
+
 func register_chain_mechanic(_mechanic_name: String) -> void:
 	if chain_timer > 0.0 and chain_count > 0:
 		chain_count += 1

movement/player_movement_controller.gd

@@ -20,10 +20,17 @@ var wind_player: AudioStreamPlayer
 var jump_player: AudioStreamPlayer
 var double_jump_player: AudioStreamPlayer
 
+var grapple_shoot_player: AudioStreamPlayer
+var grapple_latch_player: AudioStreamPlayer
+var grapple_swing_player: AudioStreamPlayer
+
 # UI
 var hit_marker: Control
 var _hit_marker_tween: Tween
 
+# Grapple
+var grapple_rope: MeshInstance3D
+
 
 func _ready() -> void:
 	var sm := _ensure_machine()
@@ -42,6 +49,7 @@ func _ready() -> void:
 	
 	_setup_audio()
 	_setup_hit_marker()
+	_setup_grapple()
 
 	set_process(true)
 	set_physics_process(true)
@@ -85,6 +93,24 @@ func _setup_audio() -> void:
 	add_child(wind_player)
 	wind_player.play()
 	
+	grapple_shoot_player = AudioStreamPlayer.new()
+	grapple_shoot_player.stream = load("res://assets/sounds/dash.wav")
+	grapple_shoot_player.volume_db = -5.0
+	grapple_shoot_player.pitch_scale = 1.5
+	add_child(grapple_shoot_player)
+	
+	grapple_latch_player = AudioStreamPlayer.new()
+	grapple_latch_player.stream = load("res://assets/sounds/hit_confirm.wav")
+	grapple_latch_player.pitch_scale = 0.8
+	add_child(grapple_latch_player)
+	
+	grapple_swing_player = AudioStreamPlayer.new()
+	grapple_swing_player.stream = load("res://assets/sounds/wind.wav")
+	grapple_swing_player.pitch_scale = 1.5
+	grapple_swing_player.volume_db = -80.0
+	add_child(grapple_swing_player)
+	grapple_swing_player.play()
+
 func _setup_hit_marker() -> void:
 	hit_marker = Control.new()
 	hit_marker.set_anchors_preset(Control.PRESET_CENTER)
@@ -106,6 +132,22 @@ func _setup_hit_marker() -> void:
 		rect.rotation = angle
 		hit_marker.add_child(rect)
 
+func _setup_grapple() -> void:
+	grapple_rope = MeshInstance3D.new()
+	var rope_mesh = CylinderMesh.new()
+	rope_mesh.top_radius = 0.04
+	rope_mesh.bottom_radius = 0.04
+	rope_mesh.height = 1.0 # Will be scaled dynamically
+	
+	var mat = StandardMaterial3D.new()
+	mat.albedo_color = Color(0.1, 0.1, 0.1) # Dark grey cable
+	mat.roughness = 0.8
+	rope_mesh.material = mat
+	
+	grapple_rope.mesh = rope_mesh
+	grapple_rope.visible = false
+	get_tree().current_scene.call_deferred("add_child", grapple_rope)
+
 var _last_hit_sound_time: int = 0
 
 func spawn_damage_number(amount: float, hit_pos: Vector3) -> void:
@@ -180,6 +222,44 @@ func _physics_process(_delta: float) -> void:
 	sm.input_crouch = Input.is_action_pressed("crouch")
 	sm.input_dash = Input.is_action_just_pressed("dash")
 	
+	sm.input_grapple = Input.is_action_pressed("grapple")
+	sm.input_grapple_just_pressed = Input.is_action_just_pressed("grapple")
+
+	# Update grapple rope visuals
+	if (sm.current_state == "grapple" or sm.is_grapple_shooting) and camera:
+		grapple_rope.visible = true
+		
+		# For shoot, start at right side of camera slightly below and closer
+		var start_pos = camera.global_position + camera.global_transform.basis * Vector3(0.3, -0.3, -0.15)
+		var end_pos = sm.grapple_point
+		
+		if sm.is_grapple_shooting and sm.grapple_travel_time > 0.0:
+			# Interpolate end_pos
+			var t = clampf(sm.grapple_shoot_time / sm.grapple_travel_time, 0.0, 1.0)
+			end_pos = start_pos.lerp(sm.grapple_point, t)
+			
+		var dist = start_pos.distance_to(end_pos)
+		if dist > 0.01:
+			grapple_rope.global_position = (start_pos + end_pos) / 2.0
+			# Look at end point
+			var up_vec = Vector3.UP
+			var dir = (end_pos - start_pos).normalized()
+			if abs(dir.dot(up_vec)) > 0.99:
+				up_vec = Vector3.RIGHT
+			# Set rotation first, which resets scale
+			grapple_rope.transform.basis = Basis.looking_at(dir, up_vec) * Basis.from_euler(Vector3(PI/2.0, 0, 0))
+			# Then apply the scale
+			grapple_rope.scale = Vector3(1.0, dist, 1.0)
+	else:
+		if grapple_rope:
+			grapple_rope.visible = false
+			
+	# Swing sound
+	if sm.current_state == "grapple" and sm.player.velocity.length() > 5.0:
+		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -15.0, _delta * 10.0)
+	else:
+		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -80.0, _delta * 15.0)
+
 	# Raw 2D input
 	var raw_input := Input.get_vector("move_left", "move_right", "move_forward", "move_back")
 
@@ -202,3 +282,7 @@ func _physics_process(_delta: float) -> void:
 func _on_movement_event(ev: String, data: Dictionary) -> void:
 	if ev == "chain_updated":
 		chain_updated.emit(data.count, data.bonus)
+	elif ev == "grapple_shoot":
+		grapple_shoot_player.play()
+	elif ev == "grapple_latch":
+		grapple_latch_player.play()

movement/states/state_grapple.gd

@@ -0,0 +1,86 @@
+extends Node
+class_name StateGrapple
+
+var machine: MovementStateMachine
+var params: MovementParams:
+	get: return machine.params
+
+func enter(_data: Dictionary = {}) -> void:
+	machine.on_ground = false
+	machine.wall_normal = Vector3.ZERO
+	machine.wall_side = 0.0
+	machine.register_chain_mechanic("grapple")
+
+func exit() -> void:
+	pass
+
+func update(delta: float) -> void:
+	var player := machine.player
+	var vel: Vector3 = player.velocity
+	
+	# If player releases the button, disconnect
+	if not machine.input_grapple:
+		machine.switch_to("air")
+		return
+
+	var grapple_pos: Vector3 = machine.grapple_point
+	var current_dist: float = player.global_position.distance_to(grapple_pos)
+	var dir_to_point: Vector3 = (grapple_pos - player.global_position).normalized()
+	
+	# Jump to detach and get a boost
+	if machine.input_jump_just_pressed and machine.jump_cooldown_timer <= 0.0:
+		vel.y = params.jump_velocity
+		# Add a directional boost if jumping while swinging
+		var h_look = machine.wish_dir_world
+		if h_look.length_squared() > 0.1:
+			var h_boost = h_look.normalized() * params.grapple_jump_boost
+			vel.x += h_boost.x
+			vel.z += h_boost.z
+			
+		player.velocity = vel
+		machine.jump_cooldown_timer = params.jump_cooldown
+		machine.register_chain_mechanic("grapple_jump")
+		machine.switch_to("air")
+		if player.jump_player:
+			player.jump_player.play()
+		return
+		
+	# Apply gravity
+	vel.y -= params.gravity * delta
+	
+	# Apply slight inward pull (reeling in)
+	vel += dir_to_point * params.grapple_pull_force * delta
+	
+	# Pendulum / Rope physics
+	# If the player tries to go further than the original rope length, pull them back aggressively
+	var max_len: float = machine.grapple_length
+	if current_dist > max_len:
+		# Project velocity onto the tangent of the sphere (prevent moving further away)
+		var radial_vel = vel.project(dir_to_point)
+		# If radial_vel is pointing AWAY from the grapple point (dot < 0), kill it
+		if radial_vel.dot(dir_to_point) < 0:
+			vel -= radial_vel
+			
+		# Add a spring force to pull them back to the sphere
+		var diff = current_dist - max_len
+		var spring_force = dir_to_point * diff * params.grapple_spring_strength
+		vel += spring_force * delta
+
+	# Air control while swinging
+	var wish_dir: Vector3 = machine.wish_dir_world
+	if wish_dir.length_squared() > 0.01:
+		wish_dir = wish_dir.normalized()
+		# Add force tangentially to the rope
+		# We want to steer, but not pull away from or directly into the rope.
+		var tangent_wish = wish_dir - wish_dir.project(dir_to_point)
+		if tangent_wish.length_squared() > 0.01:
+			vel += tangent_wish.normalized() * params.grapple_air_control * delta
+
+	player.velocity = vel
+	player.move_and_slide()
+
+	# Remove ground detach so players can grapple along the floor
+	# if player.is_on_floor():
+	# 	machine.on_ground = true
+	# 	machine.switch_to("ground")
+	# 	return

movement/states/state_grapple.gd.uid

@@ -0,0 +1 @@
+uid://8uc46pvajxdf

project.godot

@@ -83,6 +83,11 @@ reload={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":82,"physical_keycode":0,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
 ]
 }
+grapple={
+"deadzone": 0.0,
+"events": [Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":3,"canceled":false,"pressed":false,"double_click":false,"script":null)
+]
+}
 
 [physics]