手掌指针

character/assets/grab.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://c67qe66m2aft4"
+path="res://.godot/imported/grab.png-15ccc11b1ce7bc67c3d60db6d0ffc1ed.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://character/assets/grab.png"
+dest_files=["res://.godot/imported/grab.png-15ccc11b1ce7bc67c3d60db6d0ffc1ed.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

character/assets/grab_hover.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bkq6ya350cae8"
+path="res://.godot/imported/grab_hover.png-ae4fc79bd64160559a632cc7a661f9e3.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://character/assets/grab_hover.png"
+dest_files=["res://.godot/imported/grab_hover.png-ae4fc79bd64160559a632cc7a661f9e3.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

character/player/player.gd

@@ -5,13 +5,15 @@ extends CharacterBody3D
 ##   Look     视角      character/player/player_look.gd
 ##   Motor    移动跳跃  character/player/player_motor.gd
 ##   Pickup   拾取      character/player/player_pickup.gd
-##   Animator 动画表现  character/player/player_animator.gd（挂在 Body/AnimationPlayer 上）
+##   Animator 动画表现  character/player/player_animator.gd（挂在 AnimationPlayer 上）
 ##
 ## 本脚本不实现任何操作，只负责「谁先谁后」和「谁有权跑」。
 
 @onready var body: Node3D = $Body
 @onready var camera_rig: Node3D = $CameraRig
 @onready var camera: Camera3D = $CameraRig/Camera
+## 准心（挂在 CameraRig/HUD 下）。远端玩家的 HUD 会随 camera_rig 一起被释放。
+@onready var crosshair: Crosshair = $CameraRig/HUD/Crosshair
 @onready var animation_player: PlayerAnimator = $AnimationPlayer
 @onready var look: PlayerLook = $Look
 @onready var motor: PlayerMotor = $Motor
@@ -43,6 +45,8 @@ func _ready() -> void:
 		camera.get_node("InteractionRay") as RayCast3D,
 		camera.get_node("InteractionPos") as Marker3D
 	)
+	# 准心接线：拾取组件一发现交互状态变化，就通知准心换外观（点 / 手 / 抓）。
+	pickup.interact_state_changed.connect(_on_pickup_interact_state_changed)
 	set_mouse_captured(true)
 
 
@@ -62,6 +66,17 @@ func set_mouse_captured(captured: bool) -> void:
 	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED if captured else Input.MOUSE_MODE_VISIBLE
 
 
+## 把拾取组件的两个布尔量收敛成准心的三态。优先级：抓着 > 指着 > 没有。
+## 系统鼠标指针由准心自己同步（Crosshair.sync_os_cursor），这里不用管。
+func _on_pickup_interact_state_changed(hovering: bool, holding: bool) -> void:
+	var state := Crosshair.GrabState.NONE
+	if holding:
+		state = Crosshair.GrabState.HOLDING
+	elif hovering:
+		state = Crosshair.GrabState.HOVER
+	crosshair.set_grab_state(state)
+
+
 func _physics_process(delta: float) -> void:
 	# 顺序固定：算速度 → 推进 → 播动画 → 搬物体。
 	# 由根节点统一编排，各组件自己不许写 _physics_process ——

character/player/player_pickup.gd

@@ -12,9 +12,17 @@ extends Node
 ## 投掷初速度（米/秒）：按 Q 甩出去时给物体的速度大小。
 @export var throw_speed: float = 12.0
 
+## 交互状态变化时发出。
+## hovering = 准心正指着可拖拽的刚体（还没抓）；holding = 正抓着东西。
+## Player 接住这个信号去切准心外观。只在两者之一变化时发，避免每帧刷 UI。
+signal interact_state_changed(hovering: bool, holding: bool)
+
 var _current: RigidBody3D = null
 var _ray: RayCast3D
 var _hold_pos: Marker3D
+## 上一次发出的状态，用来只在「变化那一刻」发信号。
+var _hovering: bool = false
+var _holding: bool = false
 
 
 ## 由 Player 在 _ready() 注入依赖。
@@ -42,6 +50,7 @@ func _unhandled_input(event: InputEvent) -> void:
 ## 用速度把物体拽向持握点，而不是直接改 global_position ——
 ## 这样它仍会和场景里其他刚体正常碰撞，不会被硬塞进墙里。
 func physics_step() -> void:
+	_update_interact_state()
 	# 用 is_instance_valid 而不是 `== null`：物体可能在拖拽途中被 destroy，
 	# 那种情况下引用不是 null 而是「已被释放」，直接取 global_position 会报错。
 	if not is_instance_valid(_current) or not is_instance_valid(_hold_pos):
@@ -50,6 +59,23 @@ func physics_step() -> void:
 	_current.set_linear_velocity(to_hold * pick_power)
 
 
+## 检测「指着可拖拽物 / 正抓着东西」这两个状态，**只在变化时**发信号。
+## 每帧都发会让 UI 无谓重绘，所以这里自己记着上一次的结果。
+func _update_interact_state() -> void:
+	if _ray == null:
+		return
+	# 主动刷新一次：RayCast3D 的结果通常滞后于本帧的 move_and_slide，
+	# 不强制更新的话，跑动中瞄到物体要慢一帧才亮。
+	_ray.force_raycast_update()
+	var hovering := _ray.get_collider() is RigidBody3D
+	var holding := is_instance_valid(_current)
+	if hovering == _hovering and holding == _holding:
+		return
+	_hovering = hovering
+	_holding = holding
+	interact_state_changed.emit(_hovering, _holding)
+
+
 func _grab() -> void:
 	if _ray == null:
 		return