129 lines
4.5 KiB
GDScript
129 lines
4.5 KiB
GDScript
extends Node
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enum AnimState { IDLE, WALK, CROUCH, RUN, FALL, SNEAK, JUMP }
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const ANIM_CLIPS: Dictionary = {
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AnimState.IDLE: "idle",
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AnimState.WALK: "walk",
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AnimState.CROUCH: "crouch",
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AnimState.RUN: "run",
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AnimState.SNEAK: "SNEAK",
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AnimState.JUMP: "jump",
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AnimState.FALL: "fall",
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}
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## 需要循环的状态。
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const ANIM_LOOPED: Array[int] = [AnimState.IDLE, AnimState.WALK, AnimState.RUN]
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@export_group("接线")
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## 要驱动的 AnimationPlayer。留空则在本节点的兄弟子树里自动找一个。
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## 换模型后这里重新指一下即可 —— 这也是它能脱离具体模型的原因。
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@export var animation_player: AnimationPlayer
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@export_group("播放")
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## 动作切换的交叉淡入时间（秒）。0 为硬切
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@export var blend_time: float = 0.15
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## 低于此水平速度就视为站立（米/秒）
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@export var idle_threshold: float = 0.2
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## 播放倍率下限：被墙抵住、起步那一瞬，脚步不该慢到像在滑冰
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@export var speed_scale_min: float = 0.65
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## 播放倍率上限：防止速度被外力拉高时脚步快到抽搐
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@export var speed_scale_max: float = 1.6
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@export_group("片段基准速度")
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## walk 片段在多少米/秒下按 1.0 倍播放。这是片段自身的属性，不是控制器的手感参数：
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## 控制器把跑速调到 6 m/s 时，这段动画自然播成 1.2 倍，脚步自动跟上，无需同步改两边。
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@export var walk_ref_speed: float = 5.0
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## sprint 片段的基准速度（米/秒）
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@export var sprint_ref_speed: float = 8.5
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## 当前动作状态（AnimState）。权威端每物理帧写一次，Sync 复制给远端。
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var anim_state: int = AnimState.IDLE:
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set(value):
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if anim_state == value:
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return
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anim_state = value
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_play(ANIM_CLIPS.get(anim_state, ""), blend_time)
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## 当前播放倍率（1.0 = 片段原速）。
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## 同样要复制：远端只有 position，算不出真实速度，只能照抄权威端的倍率。
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var anim_speed: float = 1.0:
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set(value):
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value = clampf(value, speed_scale_min, speed_scale_max)
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anim_speed = value
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if animation_player != null:
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animation_player.speed_scale = value
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func _ready() -> void:
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if animation_player == null:
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push_warning("%s 没绑定 AnimationPlayer，角色不会有动画" % get_path())
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return
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_patch_loop_modes()
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# 同步可能在 _ready() 之前就把 anim_state 写进来了 —— 那时 animation_player 还是 null，
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# setter 空跑了一趟。所以这里按「当前状态」补播一遍，不能写死 idle。
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_play(ANIM_CLIPS.get(anim_state, ""), 0.0)
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# ---------------- 对外接口 ----------------
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## 控制器每物理帧调用一次（放在 move_and_slide() 之后）。
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## 只读入运动快照，不回写任何物理量 —— 这就是「单向耦合」的边界。
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func set_motion(velocity: Vector3, on_floor: bool, sprinting: bool = false) -> void:
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var state := _resolve_state(velocity, on_floor, sprinting)
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# 先写倍率再切片段 —— 顺序反了会让新片段用一帧旧倍率。
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anim_speed = _speed_scale_for(state, velocity)
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anim_state = state # setter 负责切片段
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## 当前正在播的片段名。调试与测试用。
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func current_clip() -> String:
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if animation_player == null:
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return ""
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return str(animation_player.current_animation)
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# ---------------- 内部 ----------------
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func _resolve_state(velocity: Vector3, on_floor: bool, sprinting: bool) -> int:
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if not on_floor:
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# 上升用 jump、越过顶点用 fall。jump 片段长 0.5s，
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# 恰好约等于 jump_velocity 5 / 重力 9.8 的上升时间。
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return AnimState.JUMP if velocity.y > 0.0 else AnimState.FALL
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if Vector2(velocity.x, velocity.z).length() < idle_threshold:
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return AnimState.IDLE
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return AnimState.SPRINT if sprinting else AnimState.WALK
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## 播放倍率 = 实际水平速度 / 该片段的基准速度。
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## 只有循环的移动动作参与缩放，跳跃/下落/站立一律原速。
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func _speed_scale_for(state: int, velocity: Vector3) -> float:
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var ref := 0.0
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match state:
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AnimState.WALK:
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ref = walk_ref_speed
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AnimState.SPRINT:
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ref = sprint_ref_speed
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_:
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return 1.0
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if ref <= 0.0:
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return 1.0
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return Vector2(velocity.x, velocity.z).length() / ref
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func _play(clip: String, blend: float) -> void:
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if animation_player == null or clip.is_empty():
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return
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if not animation_player.has_animation(clip):
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return
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animation_player.play(clip, blend)
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func _patch_loop_modes() -> void:
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for state in ANIM_LOOPED:
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var clip: String = ANIM_CLIPS[state]
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if not animation_player.has_animation(clip):
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continue
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animation_player.get_animation(clip).loop_mode = Animation.LOOP_LINEAR
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