feat: implement movement state machine architecture and add various sound assets

movement/movement_params.gd

@@ -49,6 +49,14 @@ class_name MovementParams
 @export var wall_ray_up_height: float = 0.6
 @export var wall_ray_down_height: float = -0.3
 
+# ── Wall Climb ────────────────────────────────────────────────────────────────
+@export var wall_climb_speed: float = 6.0
+@export var wall_climb_duration: float = 3.0
+@export var wall_climb_max_angle: float = 55.0
+@export var wall_climb_vault_forward: float = 16.0
+@export var wall_climb_vault_up: float = 14.0
+@export var wall_climb_vault_height_check: float = 1.0
+
 # ── Jumping ───────────────────────────────────────────────────────────────────
 @export var jump_cooldown: float = 0.27
 

movement/movement_state_machine.gd

@@ -55,6 +55,12 @@ func _ready() -> void:
 	grapple_state.set_script(load("res://movement/states/state_grapple.gd"))
 	add_child(grapple_state)
 
+	# Ensure wall climb state is injected
+	var wall_climb_state = Node.new()
+	wall_climb_state.name = "state_wall_climb"
+	wall_climb_state.set_script(load("res://movement/states/state_wall_climb.gd"))
+	add_child(wall_climb_state)
+
 	for child in get_children():
 		if child is Node and child.name.begins_with("state_"):
 			states[child.name.replace("state_", "")] = child
@@ -214,6 +220,9 @@ func detect_wall_horizontal() -> Vector3:
 		ray.exclude = [player.get_rid()]
 		var hit := space_state.intersect_ray(ray)
 		if not hit.is_empty():
+			var collider = hit.get("collider")
+			if collider is PlayerMovementController:
+				continue
 			var n: Vector3 = hit.get("normal", Vector3.ZERO)
 			# Wall must be roughly vertical (normal mostly horizontal)
 			if absf(n.y) < 0.3 and n.length_squared() > 0.0:
@@ -232,6 +241,9 @@ func detect_wall_horizontal() -> Vector3:
 			ray.exclude = [player.get_rid()]
 			var hit := space_state.intersect_ray(ray)
 			if not hit.is_empty():
+				var collider = hit.get("collider")
+				if collider is PlayerMovementController:
+					continue
 				var n: Vector3 = hit.get("normal", Vector3.ZERO)
 				if absf(n.y) < 0.3 and n.length_squared() > 0.0:
 					wall_normal = n.normalized()
@@ -242,6 +254,62 @@ func detect_wall_horizontal() -> Vector3:
 	wall_side = 0.0
 	return Vector3.ZERO
 
+## Utility: detect wall directly in front of the player.
+## Useful for wall climbing and vaulting over short walls.
+func detect_wall_forward() -> Dictionary:
+	if not player:
+		return {"hit": false, "normal": Vector3.ZERO, "is_short": false}
+	
+	var hvel := Vector3(player.velocity.x, 0.0, player.velocity.z)
+	var move_dir := Vector3.ZERO
+	if hvel.length_squared() > 0.1:
+		move_dir = hvel.normalized()
+	else:
+		move_dir = -player.global_transform.basis.z
+		move_dir.y = 0.0
+		if move_dir.length_squared() > 0.01:
+			move_dir = move_dir.normalized()
+	
+	if move_dir.length_squared() < 0.1:
+		return {"hit": false, "normal": Vector3.ZERO, "is_short": false}
+		
+	var space_state := player.get_world_3d().direct_space_state
+	var dist := params.wall_detect_distance
+	
+	# Lower ray (feet/knees)
+	var origin_low := player.global_position + Vector3.UP * params.wall_ray_down_height
+	var ray_low := PhysicsRayQueryParameters3D.create(origin_low, origin_low + move_dir * dist)
+	ray_low.exclude = [player.get_rid()]
+	var hit_low := space_state.intersect_ray(ray_low)
+
+	# Mid ray (chest/head)
+	var origin_mid := player.global_position + Vector3.UP * params.wall_ray_up_height
+	var ray_mid := PhysicsRayQueryParameters3D.create(origin_mid, origin_mid + move_dir * dist)
+	ray_mid.exclude = [player.get_rid()]
+	var hit_mid := space_state.intersect_ray(ray_mid)
+
+	# If both lower rays miss, there is no wall directly in front
+	if hit_low.is_empty() and hit_mid.is_empty():
+		return {"hit": false, "normal": Vector3.ZERO, "is_short": false}
+
+	# Get the normal from the highest point we hit, or the lowest if we only hit low
+	var best_hit = hit_mid if not hit_mid.is_empty() else hit_low
+	
+	if best_hit.get("collider") is PlayerMovementController:
+		return {"hit": false, "normal": Vector3.ZERO, "is_short": false}
+		
+	var normal: Vector3 = best_hit.get("normal", Vector3.ZERO)
+	if absf(normal.y) >= 0.3:
+		return {"hit": false, "normal": Vector3.ZERO, "is_short": false} # Not a vertical wall
+		
+	# Check if wall is short (ledge check) using a top ray
+	var origin_high := player.global_position + Vector3.UP * (params.wall_ray_up_height + params.wall_climb_vault_height_check)
+	var ray_high := PhysicsRayQueryParameters3D.create(origin_high, origin_high + move_dir * dist)
+	ray_high.exclude = [player.get_rid()]
+	var hit_high := space_state.intersect_ray(ray_high)
+	
+	return {"hit": true, "normal": normal.normalized(), "is_short": hit_high.is_empty()}
+
 
 func _apply_crouch(crouched: bool) -> void:
 	var shape_node = null

movement/player_movement_controller.gd

@@ -37,6 +37,7 @@ var wallrun_player: AudioStreamPlayer
 var wind_player: AudioStreamPlayer
 var jump_player: AudioStreamPlayer
 var double_jump_player: AudioStreamPlayer
+var vault_player: AudioStreamPlayer
 
 var grapple_shoot_player: AudioStreamPlayer
 var grapple_latch_player: AudioStreamPlayer
@@ -123,6 +124,11 @@ func _setup_audio() -> void:
 	double_jump_player.stream = load("res://assets/sounds/double_jump.wav")
 	add_child(double_jump_player)
 	
+	vault_player = AudioStreamPlayer.new()
+	vault_player.bus = "SFX"
+	vault_player.stream = load("res://assets/sounds/vault.wav")
+	add_child(vault_player)
+	
 	dash_player = AudioStreamPlayer.new()
 	dash_player.bus = "SFX"
 	dash_player.stream = load("res://assets/sounds/dash.wav")

movement/states/state_air.gd

@@ -100,11 +100,48 @@ func update(delta: float) -> void:
 			player.double_jump_player.play()
 		return
 
-	# ── Wall run transition ───────────────────────────────────────────────
-	var wall_n := machine.detect_wall_horizontal()
-	if wall_n != Vector3.ZERO and machine.input_dir.length() > 0.1 and machine.wall_cooldown_timer <= 0.0:
-		machine.switch_to("wall_run")
-		return
+	# ── Wall interaction (Run, Climb, Vault) ──────────────────────────────
+	if machine.input_dir.length() > 0.1 and machine.wall_cooldown_timer <= 0.0:
+		var fwd_wall = machine.detect_wall_forward()
+		if fwd_wall.hit:
+			if fwd_wall.is_short:
+				# Instant Vault
+				var look_dir := -player.global_transform.basis.z
+				var h_look := Vector3(look_dir.x, 0.0, look_dir.z)
+				if h_look.length_squared() > 0.01:
+					h_look = h_look.normalized()
+				player.velocity = h_look * params.wall_climb_vault_forward
+				player.velocity.y = params.wall_climb_vault_up
+				if player.vault_player:
+					player.vault_player.play()
+					
+				# Quick camera animation (tilt up and forward bob)
+				var camera = player.camera
+				if camera:
+					var tween = player.create_tween()
+					tween.tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x + 10.0, 0.15).set_trans(Tween.TRANS_SINE)
+					tween.parallel().tween_property(camera, "v_offset", -0.2, 0.15).set_trans(Tween.TRANS_SINE)
+					tween.chain().tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x, 0.2).set_trans(Tween.TRANS_SINE)
+					tween.parallel().tween_property(camera, "v_offset", 0.0, 0.2).set_trans(Tween.TRANS_SINE)
+					
+				machine.wall_cooldown_timer = 0.3
+				return
+			else:
+				# Check if moving directly into wall and looking generally towards it
+				var look_dir := -player.global_transform.basis.z
+				var looking_towards := look_dir.dot(-fwd_wall.normal) > 0.0
+				var moving_towards := wish_dir.dot(-fwd_wall.normal) > cos(deg_to_rad(params.wall_climb_max_angle))
+				
+				if looking_towards and moving_towards:
+					machine.wall_normal = fwd_wall.normal
+					machine.switch_to("wall_climb")
+					return
+		
+		# Fallback to wall run
+		var wall_n := machine.detect_wall_horizontal()
+		if wall_n != Vector3.ZERO:
+			machine.switch_to("wall_run")
+			return
 
 	# ── Dash ──────────────────────────────────────────────────────────────
 	if machine.input_dash:

movement/states/state_ground.gd

@@ -90,6 +90,45 @@ func update(delta: float) -> void:
 
 	player.velocity = vel
 	player.move_and_slide()
+	
+	# ── Stair Stepping ────────────────────────────────────────────────────
+	if wish_dir.length_squared() > 0.01 and not machine.input_crouch:
+		for i in range(player.get_slide_collision_count()):
+			var col = player.get_slide_collision(i)
+			if absf(col.get_normal().y) < 0.3: # Hit a wall
+				var max_step_height = 0.5
+				var space_state = player.get_world_3d().direct_space_state
+				var feet_y = player.global_position.y - (machine.original_capsule_height / 2.0)
+				
+				# Raycast down from above the step
+				var fwd = wish_dir.normalized()
+				var ray_start = player.global_position + fwd * 0.5
+				ray_start.y = feet_y + max_step_height + 0.1
+				var ray_end = ray_start - Vector3.UP * (max_step_height + 0.2)
+				
+				var ray = PhysicsRayQueryParameters3D.create(ray_start, ray_end)
+				ray.exclude = [player.get_rid()]
+				var hit = space_state.intersect_ray(ray)
+				
+				if not hit.is_empty() and hit.normal.y > 0.7:
+					var step_height = hit.position.y - feet_y
+					if step_height > 0.01 and step_height <= max_step_height:
+						# Check if we have headroom to move up
+						var head_ray_start = player.global_position
+						head_ray_start.y += (machine.original_capsule_height / 2.0)
+						var head_ray_end = head_ray_start + Vector3.UP * (step_height + 0.1)
+						var head_ray = PhysicsRayQueryParameters3D.create(head_ray_start, head_ray_end)
+						head_ray.exclude = [player.get_rid()]
+						
+						if space_state.intersect_ray(head_ray).is_empty():
+							# We can safely step up
+							player.global_position.y += step_height + 0.01
+							# Push slightly forward to get onto the step
+							player.global_position += fwd * 0.1
+							# Restore horizontal velocity that was lost from hitting the wall
+							player.velocity.x = hvel.x
+							player.velocity.z = hvel.z
+							break
 
 	_update_capsule_height()
 
@@ -116,12 +155,50 @@ func update(delta: float) -> void:
 			machine.switch_to("air")
 			return
 
-	# ── Wall run check ────────────────────────────────────────────────────
-	var wall_n := machine.detect_wall_horizontal()
-	if wall_n != Vector3.ZERO and machine.input_dir.length() > 0.1:
-		if not player.is_on_floor():
-			machine.switch_to("wall_run")
-			return
+	# ── Wall interaction (Run, Climb, Vault) ──────────────────────────────
+	if machine.input_dir.length() > 0.1 and machine.wall_cooldown_timer <= 0.0 and not machine.input_crouch:
+		var fwd_wall = machine.detect_wall_forward()
+		if fwd_wall.hit:
+			if fwd_wall.is_short:
+				# Instant Vault
+				var look_dir := -player.global_transform.basis.z
+				var h_look := Vector3(look_dir.x, 0.0, look_dir.z)
+				if h_look.length_squared() > 0.01:
+					h_look = h_look.normalized()
+				player.velocity = h_look * params.wall_climb_vault_forward
+				player.velocity.y = params.wall_climb_vault_up
+				if player.vault_player:
+					player.vault_player.play()
+					
+				# Quick camera animation (tilt up and forward bob)
+				var camera = player.camera
+				if camera:
+					var tween = player.create_tween()
+					tween.tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x + 10.0, 0.15).set_trans(Tween.TRANS_SINE)
+					tween.parallel().tween_property(camera, "v_offset", -0.2, 0.15).set_trans(Tween.TRANS_SINE)
+					tween.chain().tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x, 0.2).set_trans(Tween.TRANS_SINE)
+					tween.parallel().tween_property(camera, "v_offset", 0.0, 0.2).set_trans(Tween.TRANS_SINE)
+					
+				machine.wall_cooldown_timer = 0.3
+				machine.switch_to("air")
+				return
+			else:
+				# Check if moving directly into wall and looking generally towards it
+				var look_dir := -player.global_transform.basis.z
+				var looking_towards := look_dir.dot(-fwd_wall.normal) > 0.0
+				var moving_towards := wish_dir.dot(-fwd_wall.normal) > cos(deg_to_rad(params.wall_climb_max_angle))
+				
+				if looking_towards and moving_towards:
+					machine.wall_normal = fwd_wall.normal
+					machine.switch_to("wall_climb")
+					return
+		
+		# Fallback to wall run
+		var wall_n := machine.detect_wall_horizontal()
+		if wall_n != Vector3.ZERO:
+			if not player.is_on_floor():
+				machine.switch_to("wall_run")
+				return
 
 	# ── Dash ──────────────────────────────────────────────────────────────
 	if machine.input_dash:

movement/states/state_slide.gd

@@ -64,6 +64,22 @@ func update(delta: float) -> void:
 	vel.x *= pow(params.slide_friction, delta * 10.0)
 	vel.z *= pow(params.slide_friction, delta * 10.0)
 
+	# ── Allow slight steering ─────────────────────────────────────────────
+	var wish_dir := machine.wish_dir_world
+	if wish_dir.length_squared() > 0.01:
+		wish_dir = wish_dir.normalized()
+		var hvel := Vector3(vel.x, 0.0, vel.z)
+		var current_speed := hvel.length()
+		
+		# Slowly bend velocity towards wish_dir
+		var steer_speed = 3.0 * delta
+		var new_hvel = hvel.lerp(wish_dir * current_speed, steer_speed)
+		vel.x = new_hvel.x
+		vel.z = new_hvel.z
+		
+		if new_hvel.length_squared() > 0.01:
+			_slide_direction = new_hvel.normalized()
+
 	# ── Gravity (for slopes) ──────────────────────────────────────────────
 	if not player.is_on_floor():
 		vel.y -= params.gravity * delta

movement/states/state_wall_climb.gd

@@ -0,0 +1,124 @@
+extends Node
+class_name StateWallClimb
+
+var machine: MovementStateMachine
+var params: MovementParams:
+	get: return machine.params
+
+var elapsed: float = 0.0
+
+func enter(_data: Dictionary = {}) -> void:
+	elapsed = 0.0
+	machine.register_chain_mechanic("wall_climb")
+	machine.on_ground = false
+
+	if machine.player.wallrun_player and not machine.player.wallrun_player.playing:
+		machine.player.wallrun_player.play()
+
+	# Give an initial upward boost
+	var player := machine.player
+	player.velocity.y = params.wall_climb_speed
+	
+	var hvel := Vector3(player.velocity.x, 0.0, player.velocity.z)
+	player.velocity.x = hvel.x * 0.5
+	player.velocity.z = hvel.z * 0.5
+
+func exit() -> void:
+	if machine.player.wallrun_player:
+		machine.player.wallrun_player.stop()
+
+func update(delta: float) -> void:
+	elapsed += delta
+	var player := machine.player
+	
+	if player.wallrun_player and not player.wallrun_player.playing:
+		player.wallrun_player.play()
+
+	# ── Time limit ────────────────────────────────────────────────────────
+	if elapsed > params.wall_climb_duration:
+		_detach()
+		return
+
+	# ── Look/Move away to transition to wall run ──────────────────────────────
+	var look_dir := -player.global_transform.basis.z
+	var wish_dir := machine.wish_dir_world
+	
+	var looking_towards := look_dir.dot(-machine.wall_normal) > 0.0
+	var moving_sideways := false
+	if wish_dir.length_squared() > 0.01:
+		moving_sideways = wish_dir.dot(-machine.wall_normal) <= cos(deg_to_rad(params.wall_climb_max_angle))
+		
+	if not looking_towards or moving_sideways:
+		# We are looking away or moving sideways, transition to wall run
+		# The wall run state will figure out tangent and side
+		var wall_n = machine.detect_wall_horizontal()
+		if wall_n != Vector3.ZERO:
+			machine.switch_to("wall_run")
+			return
+		else:
+			_detach()
+			return
+			
+	# ── Ledge Vault Check ─────────────────────────────────────────────────
+	var fwd_wall = machine.detect_wall_forward()
+	if not fwd_wall.hit:
+		# The forward lower ray missed, we fell off the wall completely
+		_detach()
+		return
+	
+	if fwd_wall.is_short:
+		# The upper ray missed, meaning we reached the top of the wall!
+		_vault()
+		return
+
+	# ── Movement ──────────────────────────────────────────────────────────
+	# Slow down over time
+	var speed_factor = maxf(0.0, 1.0 - (elapsed / params.wall_climb_duration))
+	player.velocity.y = params.wall_climb_speed * speed_factor
+
+	# Push slightly into the wall to maintain contact
+	player.velocity -= machine.wall_normal * 2.0
+
+	player.move_and_slide()
+
+	# ── Hit floor during wall climb (should be rare) ──────────────────────
+	if player.is_on_floor():
+		machine.on_ground = true
+		machine.wall_normal = Vector3.ZERO
+		machine.wall_side = 0.0
+		machine.current_jump_count = 0
+		machine.switch_to("ground")
+
+func _detach() -> void:
+	machine.wall_normal = Vector3.ZERO
+	machine.wall_side = 0.0
+	machine.wall_cooldown_timer = 0.3
+	machine.switch_to("air")
+
+func _vault() -> void:
+	var player := machine.player
+	var look_dir := -player.global_transform.basis.z
+	var h_look := Vector3(look_dir.x, 0.0, look_dir.z)
+	if h_look.length_squared() > 0.01:
+		h_look = h_look.normalized()
+	
+	# Impulse
+	player.velocity = h_look * params.wall_climb_vault_forward
+	player.velocity.y = params.wall_climb_vault_up
+	
+	if player.vault_player:
+		player.vault_player.play()
+		
+	# Quick camera animation (tilt up and forward bob)
+	var camera = player.camera
+	if camera:
+		var tween = player.create_tween()
+		tween.tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x + 10.0, 0.15).set_trans(Tween.TRANS_SINE)
+		tween.parallel().tween_property(camera, "v_offset", -0.2, 0.15).set_trans(Tween.TRANS_SINE)
+		tween.chain().tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x, 0.2).set_trans(Tween.TRANS_SINE)
+		tween.parallel().tween_property(camera, "v_offset", 0.0, 0.2).set_trans(Tween.TRANS_SINE)
+
+	machine.wall_normal = Vector3.ZERO
+	machine.wall_side = 0.0
+	machine.wall_cooldown_timer = 0.3
+	machine.switch_to("air")

movement/states/state_wall_climb.gd.uid

@@ -0,0 +1 @@
+uid://bdri08bsr5muh

movement/states/state_wall_run.gd

@@ -16,8 +16,8 @@ func enter(_data: Dictionary = {}) -> void:
 	elapsed = 0.0
 	machine.register_chain_mechanic("wall_run")
 	# Cap the upward momentum so they don't fly up the wall, 
-	# but preserve some if they just jumped onto it.
-	machine.player.velocity.y = minf(machine.player.velocity.y, 1.5)
+	# and prevent negative y momentum so the wall "catches" them.
+	machine.player.velocity.y = clampf(machine.player.velocity.y, 0.0, 1.5)
 	machine.on_ground = false
 	_last_vel = machine.player.velocity