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RUDPClient/openspec/changes/separate-simulation-from-pr.../proposal.md

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Why

当前 MovementComponent 将模拟层（pending inputs 维护、服务器校正、重放）和表现层（视觉插值、bounded correction）耦合在一起。bounded correction 的收敛目标是实时变化的 server position，导致客户端永远在追赶——每次收到服务器状态，收敛目标就变了。表现为本地移动平滑，加上网络同步后抖动。

What Changes

  • 新增 LocalPlayerPresentationState 类型：持有 _currentPosition/Rotation（当前显示）和 _targetPosition/Rotation（模拟层给的目标）
  • 新增 LocalPlayerSimulationState 类型：持有 _lastAuthoritativePosition/Rotation、_pendingInputs、_presentationTarget
  • 重构 MovementComponent：OnAuthoritativeState 只更新 _presentationTarget，不直接修改 rigid.position
  • 重构 表现层：每帧用 Lerp 将 _currentPosition 插值到 _targetPosition，再设置 rigid.position
  • 移除 ControlledPlayerCorrection 相关逻辑：bounded correction 被表现层 Lerp 替代

Capabilities

New Capabilities

  • local-player-presentation-state: 表现层状态（current/target position & rotation）及每帧插值更新
  • local-player-simulation-state: 模拟层状态（authoritative baseline、pending inputs、presentation target）

Modified Capabilities

  • local-player-reconciliation: 模拟层收到服务器状态后计算 PresentationTarget，表现层负责插值收敛，不再使用 bounded correction

Impact

  • 新增 Assets/Scripts/Network/NetworkApplication/LocalPlayerPresentationState.cs
  • 新增 Assets/Scripts/Network/NetworkApplication/LocalPlayerSimulationState.cs
  • 修改 Assets/Scripts/MovementComponent.cs
  • 删除 Assets/Scripts/ControlledPlayerCorrection.cs（或保留作他用）