307 lines
14 KiB
C#
307 lines
14 KiB
C#
using UnityEngine;
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namespace BaseGames.Player
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{
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/// <summary>
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/// 玩家物理移动组件。封装 Rigidbody2D 操作，提供跑动、跳跃、击退等接口。
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/// </summary>
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// 执行顺序必须早于 PlayerController（-100），确保每帧 FixedUpdate
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// 开头能在状态机写入速度之前先应用"强制清零"标记。
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[DefaultExecutionOrder(-200)]
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[RequireComponent(typeof(Rigidbody2D))]
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public class PlayerMovement : MonoBehaviour
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{
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[Header("配置")]
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[SerializeField] private PlayerMovementConfigSO _config;
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[Header("地面检测")]
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[SerializeField] private Transform _groundCheck;
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[SerializeField] private Vector2 _groundCheckSize = new Vector2(0.8f, 0.05f);
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[SerializeField] private LayerMask _groundLayer;
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[Header("朝向")]
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[SerializeField] private SpriteRenderer _spriteRenderer;
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// ── 运行时状态 ────────────────────────────────────────────────────────
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private Rigidbody2D _rb;
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private float _coyoteTimer;
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private bool _isGrounded;
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// Update 中调用 ZeroHorizontalVelocity 后设置此标记；
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// 下一个 FixedUpdate（-200，先于状态机 -100）读取并清零，
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// 防止状态机用旧输入把速度重新写成非零值。
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private bool _pendingHorizontalZero;
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private bool _isWallLeft;
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private bool _isWallRight;
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private bool _onOneWayPlatform;
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private int _facingDirection = 1;
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private bool _cancelWindowOpen;
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private SurfaceType _currentSurface = SurfaceType.Ground;
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private readonly Collider2D[] _groundBuffer = new Collider2D[4];
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public bool IsGrounded => _isGrounded;
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public bool HasCoyoteTime => _coyoteTimer > 0f;
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public bool IsWallLeft => _isWallLeft;
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public bool IsWallRight => _isWallRight;
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public bool OnOneWayPlatform => _onOneWayPlatform;
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public int FacingDirection => _facingDirection;
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public Rigidbody2D Rb => _rb;
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public bool CancelWindowOpen => _cancelWindowOpen;
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public SurfaceType CurrentSurface => _currentSurface;
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/// <summary>垂直速度大于零（处于上升弧段）。供 WallJumpState 判断起跳是否结束。</summary>
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public bool IsRising => _rb.velocity.y > 0f;
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private void Awake()
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{
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Debug.Assert(_config != null, "[PlayerMovement] _config 未赋值，请在 Inspector 中指定 PlayerMovementConfigSO。", this);
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_rb = GetComponent<Rigidbody2D>();
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// 关闭位置插值：若开启插值，渲染位置会在速度清零后仍追赶 1~2 渲染帧，产生视觉滑行。
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_rb.interpolation = RigidbodyInterpolation2D.None;
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if (_spriteRenderer == null)
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_spriteRenderer = GetComponentInChildren<SpriteRenderer>();
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}
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private void FixedUpdate()
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{
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// 优先处理来自 Update 的强制清零请求（在状态机 OnStateFixedUpdate 之前执行）。
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if (_pendingHorizontalZero)
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{
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_rb.velocity = new Vector2(0f, _rb.velocity.y);
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_pendingHorizontalZero = false;
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}
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CheckGrounded();
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CheckWalls();
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if (_isGrounded)
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_coyoteTimer = _config.CoyoteTime;
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else
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_coyoteTimer = Mathf.Max(0f, _coyoteTimer - Time.fixedDeltaTime);
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}
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// ── 移动 ──────────────────────────────────────────────────────────────
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/// <summary>
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/// 直接赋予目标水平速度（按键即全速，松键即停，无加速过渡）。
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/// 地面状态每帧直接到达全速；空中调用时同样即时，但配合 ApplyAirDrag
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/// 在无输入时自然减速，保留跳出时的动量。
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/// </summary>
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public void Move(float speedX)
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{
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_rb.velocity = new Vector2(speedX, _rb.velocity.y);
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}
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/// <summary>
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/// 空中无输入时施加空气阻力：水平速度乘以 <paramref name="factor"/>，
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/// 低于阈值时归零，避免速度无限趋近 0。
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/// 在 FallState / JumpState / WallJumpState 的 OnStateFixedUpdate 中调用。
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/// </summary>
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public void ApplyAirDrag(float factor)
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{
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float newX = _rb.velocity.x * factor;
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if (Mathf.Abs(newX) < 0.05f) newX = 0f;
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_rb.velocity = new Vector2(newX, _rb.velocity.y);
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}
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// ── 跳跃 ──────────────────────────────────────────────────────────────
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public void Jump(bool isVariable = true)
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{
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_rb.velocity = new Vector2(_rb.velocity.x, _config.JumpForce);
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_coyoteTimer = 0f;
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}
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public void CutJump()
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{
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if (_rb.velocity.y > 0f)
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_rb.velocity = new Vector2(_rb.velocity.x, _rb.velocity.y * _config.JumpCutMultiplier);
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}
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/// <summary>
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/// 二段跳。覆盖当前垂直速度为 DoubleJumpForce。
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/// FallState / JumpState 在检测到 HasAbility(DoubleJump) && AirJumpsLeft > 0 时调用。
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/// </summary>
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public void DoubleJump()
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{
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_rb.velocity = new Vector2(_rb.velocity.x, _config.DoubleJumpForce);
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_coyoteTimer = 0f;
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}
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// ── 重力 ──────────────────────────────────────────────────────────────
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public void SetGravityScale(float scale) => _rb.gravityScale = scale;
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// ── 击退 ──────────────────────────────────────────────────────────────
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public void ApplyKnockback(Vector2 direction, float force)
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=> _rb.velocity = direction.normalized * force;
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// ── 速度控制 ──────────────────────────────────────────────────────────
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public void ZeroVelocity() => _rb.velocity = Vector2.zero;
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public void ZeroHorizontalVelocity()
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{
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_rb.velocity = new Vector2(0f, _rb.velocity.y);
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// 设置标记：下一个 FixedUpdate 开头再次强制清零，
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// 防止因读到旧输入而把速度重新写成非零值。
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_pendingHorizontalZero = true;
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}
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// ── 朝向 ──────────────────────────────────────────────────────────────
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public void UpdateFacing()
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{
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float vx = _rb.velocity.x;
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if (Mathf.Abs(vx) < 0.1f) return;
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int dir = vx > 0f ? 1 : -1;
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if (dir == _facingDirection) return;
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_facingDirection = dir;
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if (_spriteRenderer != null)
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_spriteRenderer.flipX = dir < 0;
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}
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// ── 取消窗口 ──────────────────────────────────────────────────────────
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public void SetCancelWindowOpen(bool open) => _cancelWindowOpen = open;
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// ── 冲刺 ──────────────────────────────────────────────────────────────
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/// <summary>
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/// 施加冲刺速度（DashState/AerialDashState 调用）。
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/// direction 应为归一化水平向量（±1, 0）。
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/// 冲刺期间调用 SetGravityScale(0) 可关闭重力；结束后恢复默认重力。
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/// </summary>
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public void Dash(Vector2 direction, float speed)
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{
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_rb.velocity = new Vector2(direction.x * speed, 0f);
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}
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/// <summary>
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/// 壁滑：将垂直速度限制为 -WallSlideSpeed（向下缓慢滑动）。
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/// WallSlideState.OnStateFixedUpdate 每帧调用。
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/// </summary>
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public void ApplyWallSlide()
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{
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float targetY = -_config.WallSlideSpeed;
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if (_rb.velocity.y < targetY)
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_rb.velocity = new Vector2(_rb.velocity.x, targetY);
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}
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/// <summary>
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/// 蹬墙跳：对墙方向施加相反水平力 + 向上力。
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/// wallDir = +1 (右墙) 或 -1 (左墙)，跳跃方向与之相反。
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/// </summary>
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public void WallJump(int wallDir)
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{
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float forceX = -wallDir * _config.WallJumpForceX;
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float forceY = _config.WallJumpForceY;
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_rb.velocity = new Vector2(forceX, forceY);
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_coyoteTimer = 0f;
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}
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/// <summary>单向平台穿透（输入下行 + 跳跃键时触发）。</summary>
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public void DropThroughPlatform() { }
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// ── Physics 检测 ──────────────────────────────────────────────────────
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private void CheckGrounded()
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{
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bool wasGrounded = _isGrounded;
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Vector2 origin = _groundCheck != null
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? (Vector2)_groundCheck.position
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: (Vector2)transform.position + Vector2.down * 0.5f;
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_isGrounded = Physics2D.OverlapBoxNonAlloc(origin, _groundCheckSize, 0f, _groundBuffer, _groundLayer) > 0;
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if (_isGrounded && !wasGrounded)
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_coyoteTimer = _config.CoyoteTime;
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}
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private void CheckWalls()
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{
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float len = _config.WallRayLength;
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float offY = _config.WallRayOffsetY;
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Vector2 pos = (Vector2)transform.position + Vector2.up * offY;
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_isWallLeft = Physics2D.Raycast(pos, Vector2.left, len, _groundLayer);
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_isWallRight = Physics2D.Raycast(pos, Vector2.right, len, _groundLayer);
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}
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private void OnDrawGizmos()
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{
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#if UNITY_EDITOR
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// ── 1. 角色物理轮廓（浅绿，始终可见）────────────────────────────
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Gizmos.color = new Color(0.4f, 1f, 0.4f, 0.65f);
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foreach (var col in GetComponents<Collider2D>())
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{
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if (col.isTrigger) continue;
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BaseGames.Combat.HitBox.DrawCollider2DWire(col);
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}
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// ── 2. 朝向箭头（金黄）──────────────────────────────────────────
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Vector3 center = transform.position;
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Vector3 arrowEnd = center + new Vector3(_facingDirection * 0.55f, 0f, 0f);
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DrawArrow2D(center, arrowEnd, new Color(1f, 0.85f, 0.1f, 0.95f));
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// ── 3. 站立检测框（落地亮绿 / 未落地淡绿）──────────────────────
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Vector2 gOrigin = _groundCheck != null
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? (Vector2)_groundCheck.position
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: (Vector2)transform.position + Vector2.down * 0.5f;
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bool grounded = Application.isPlaying && _isGrounded;
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Gizmos.color = grounded
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? new Color(0.1f, 1f, 0.3f, 0.9f)
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: new Color(0.4f, 0.85f, 0.4f, 0.35f);
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BaseGames.Combat.HitBox.DrawWireRect2D(gOrigin, _groundCheckSize);
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// ── 4. 靠墙检测射线（碰墙橙色 / 未碰淡黄，带端点圆点）─────────
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if (_config == null) return;
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float wLen = _config.WallRayLength;
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float wOffY = _config.WallRayOffsetY;
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Vector2 wallPos = (Vector2)transform.position + Vector2.up * wOffY;
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bool lHit = Application.isPlaying && _isWallLeft;
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bool rHit = Application.isPlaying && _isWallRight;
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Gizmos.color = lHit ? new Color(1f, 0.45f, 0f, 1f) : new Color(1f, 0.85f, 0.3f, 0.4f);
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Gizmos.DrawRay(wallPos, Vector2.left * wLen);
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BaseGames.Combat.HitBox.DrawWireCircle2D((Vector3)(wallPos + Vector2.left * wLen), 0.04f, 8);
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Gizmos.color = rHit ? new Color(1f, 0.45f, 0f, 1f) : new Color(1f, 0.85f, 0.3f, 0.4f);
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Gizmos.DrawRay(wallPos, Vector2.right * wLen);
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BaseGames.Combat.HitBox.DrawWireCircle2D((Vector3)(wallPos + Vector2.right * wLen), 0.04f, 8);
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#endif
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}
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private void OnDrawGizmosSelected()
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{
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#if UNITY_EDITOR
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// 运行时：用青色箭头显示速度向量（仅选中时，按比例缩放）
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if (!Application.isPlaying || _rb == null) return;
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Vector2 vel = _rb.velocity;
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if (vel.sqrMagnitude < 0.01f) return;
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DrawArrow2D(transform.position, transform.position + (Vector3)(vel * 0.12f),
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new Color(0.2f, 0.9f, 1f, 0.9f), 0.1f);
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#endif
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}
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// 在 Gizmos 空间绘制带箭头的 2D 有向线段
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private static void DrawArrow2D(Vector3 from, Vector3 to, Color color, float headLen = 0.15f)
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{
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Vector3 dir = to - from;
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if (dir.sqrMagnitude < 0.0001f) return;
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dir = dir.normalized;
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Gizmos.color = color;
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Gizmos.DrawLine(from, to);
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// 将 -dir 分别旋转 ±35° 得到箭头两翼
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float cos = 0.8192f; // Mathf.Cos(35° in radians)
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float sin = 0.5736f; // Mathf.Sin(35°)
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float bx = -dir.x, by = -dir.y;
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Vector3 wing1 = new Vector3(bx * cos - by * sin, bx * sin + by * cos, 0f) * headLen;
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Vector3 wing2 = new Vector3(bx * cos + by * sin, -bx * sin + by * cos, 0f) * headLen;
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Gizmos.DrawLine(to, to + wing1);
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Gizmos.DrawLine(to, to + wing2);
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}
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}
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/// <summary>当前所在地面类型（用于脚步声等反馈）。</summary>
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public enum SurfaceType
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{
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Ground,
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OneWayPlatform,
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Slope,
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Ice,
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}
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}
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