feat(feedback): add responsive camera and impacts

Game/scripts/ship_camera.gd

@@ -7,6 +7,7 @@ extends Node3D
 # themselves are camera-free (a headless/AI ship never needs one).
 
 signal camera_mode_changed(is_ball_cam: bool)
+signal impact_feedback(intensity: float)
 
 @export var camera_distance := 8.0
 @export var camera_height := 3.0
@@ -14,8 +15,24 @@ signal camera_mode_changed(is_ball_cam: bool)
 @export var orbit_smoothing := 6.0   # How fast the camera swings around the ship in ball cam
 @export var look_smoothing := 20.0   # How fast the camera re-centres its look target
 @export var min_camera_height := 1.0 # Keeps the camera from dipping through the arena floor
+@export_group("Speed Feel")
+@export var base_fov := 70.0
+@export var speed_fov_add := 11.0
+@export var turbo_fov_kick := 7.0
+@export var turbo_distance_kick := 0.9
+@export var feel_smoothing := 7.0
+@export_group("Impact Shake")
+@export var max_shake_offset := 0.32
+@export var shake_decay := 8.0
 
-var target: Ship
+var target: Ship:
+	set(value):
+		if target == value:
+			return
+		if is_instance_valid(target) and target.ball_contact.is_connected(_on_target_ball_contact):
+			target.ball_contact.disconnect(_on_target_ball_contact)
+		target = value
+		_connect_target()
 var ball_cam_enabled := true
 
 @onready var camera: Camera3D = $Camera3D
@@ -25,11 +42,34 @@ var _ball: Node3D
 # this so the camera swings smoothly around the ship instead of chasing a
 # raw position (which whips when ball and ship are close together).
 var _orbit_dir := Vector3.BACK
+var _turbo_blend := 0.0
+var _effective_distance := 8.0
+var _shake_strength := 0.0
+var _shake_noise := FastNoiseLite.new()
+var _shake_time := 0.0
+var _last_shake_offset := Vector3.ZERO
 
 
 func _ready():
 	# Group lets the HUD discover the rig for the camera-mode instrument
 	add_to_group("ship_camera")
+	camera.fov = base_fov
+	_effective_distance = camera_distance
+	_shake_noise.noise_type = FastNoiseLite.TYPE_SIMPLEX_SMOOTH
+	_shake_noise.frequency = 2.5
+	_connect_target()
+
+
+func _connect_target() -> void:
+	if not is_inside_tree() or not is_instance_valid(target):
+		return
+	if not target.ball_contact.is_connected(_on_target_ball_contact):
+		target.ball_contact.connect(_on_target_ball_contact)
+
+
+func _exit_tree() -> void:
+	if is_instance_valid(target) and target.ball_contact.is_connected(_on_target_ball_contact):
+		target.ball_contact.disconnect(_on_target_ball_contact)
 
 
 func _input(event):
@@ -39,8 +79,14 @@ func _input(event):
 
 
 func _physics_process(delta):
+	# Camera position smoothing operates on the unshaken chase position. Remove
+	# last frame's presentation-only offset first so shake never accumulates or
+	# exceeds its configured amplitude during a low-time-scale hit-stop.
+	camera.global_position -= _last_shake_offset
+	_last_shake_offset = Vector3.ZERO
 	if not is_instance_valid(target):
 		return
+	_update_speed_feel(delta)
 	var ball := _get_ball()
 	if ball_cam_enabled and ball:
 		_update_ball_cam(delta, ball)
@@ -77,11 +123,12 @@ func _update_ball_cam(delta, ball: Node3D):
 		var swing := _orbit_dir.signed_angle_to(flat.normalized(), Vector3.UP)
 		_orbit_dir = _orbit_dir.rotated(Vector3.UP, swing * t).normalized()
 
-	var camera_target_pos := ship_pos + _orbit_dir * camera_distance + Vector3.UP * camera_height
+	var camera_target_pos := ship_pos + _orbit_dir * _effective_distance + Vector3.UP * camera_height
 	camera_target_pos.y = maxf(camera_target_pos.y, min_camera_height)
 
 	var pos_t := 1.0 - exp(-camera_smoothing * delta)
 	camera.global_position = camera.global_position.lerp(camera_target_pos, pos_t)
+	_apply_shake(delta)
 
 	# Look slightly above the ball's centre; look smoothing is faster than
 	# position smoothing so the ball never drifts out of frame while the
@@ -95,11 +142,12 @@ func _update_ship_cam(delta):
 	var ship_forward: Vector3 = -target.global_transform.basis.z
 
 	# Position camera behind and above the ship
-	var camera_target_pos := ship_pos - ship_forward * camera_distance + Vector3.UP * camera_height
+	var camera_target_pos := ship_pos - ship_forward * _effective_distance + Vector3.UP * camera_height
 	camera_target_pos.y = maxf(camera_target_pos.y, min_camera_height)
 
 	var pos_t := 1.0 - exp(-camera_smoothing * delta)
 	camera.global_position = camera.global_position.lerp(camera_target_pos, pos_t)
+	_apply_shake(delta)
 
 	# Look ahead of the ship
 	_smooth_look_at(ship_pos + ship_forward * 10.0, delta)
@@ -115,3 +163,39 @@ func _smooth_look_at(point: Vector3, delta: float) -> void:
 	var look_basis := Basis.looking_at(dir, Vector3.UP)
 	var look_t := 1.0 - exp(-look_smoothing * delta)
 	camera.global_basis = camera.global_basis.slerp(look_basis, look_t).orthonormalized()
+
+
+func _update_speed_feel(delta: float) -> void:
+	var feel_t := 1.0 - exp(-feel_smoothing * delta)
+	var turbo_target := 1.0 if target.is_turbo_active() else 0.0
+	_turbo_blend = lerpf(_turbo_blend, turbo_target, feel_t)
+	var target_fov := base_fov + target.get_speed_ratio() * speed_fov_add + _turbo_blend * turbo_fov_kick
+	camera.fov = lerpf(camera.fov, target_fov, feel_t)
+	_effective_distance = lerpf(
+		_effective_distance, camera_distance + _turbo_blend * turbo_distance_kick, feel_t
+	)
+
+
+func _on_target_ball_contact(intensity: float, _world_position: Vector3) -> void:
+	_shake_strength = maxf(_shake_strength, clampf(intensity, 0.0, 1.0))
+	for device in Input.get_connected_joypads():
+		Input.start_joy_vibration(
+			device, lerpf(0.18, 0.65, intensity), lerpf(0.32, 1.0, intensity),
+			lerpf(0.08, 0.2, intensity)
+		)
+	impact_feedback.emit(intensity)
+
+
+func _apply_shake(delta: float) -> void:
+	if _shake_strength <= 0.001:
+		_shake_strength = 0.0
+		return
+	_shake_time += delta * 60.0
+	var amplitude := max_shake_offset * _shake_strength * _shake_strength
+	var noise := Vector2(
+		_shake_noise.get_noise_1d(_shake_time),
+		_shake_noise.get_noise_1d(_shake_time + 100.0)
+	).limit_length(1.0) * amplitude
+	_last_shake_offset = camera.global_basis.x * noise.x + camera.global_basis.y * noise.y
+	camera.global_position += _last_shake_offset
+	_shake_strength = move_toward(_shake_strength, 0.0, shake_decay * delta)