[UE4]Movement and Networking Related

keywords: [UE4]Movement and Networking Related

keywords：UE4、Movement Replicate、Networking、Server、Client、Smooth

引擎对于客户端服务端的位移同步，CharacterMovementComponent::SmoothCorrection()函数中有进行平滑处理。

Reference

其他参考资料：
What is the best way to smooth player movement for network hiccups? Interp? Ease? (no physics)
https://answers.unrealengine.com/questions/479211/what-is-the-best-way-to-smooth-player-movement-for.html

Authoritative Networked Character Movement
https://wiki.unrealengine.com/Authoritative_Networked_Character_Movement

Advanced Topic: Adding New Movement Abilities to Character Movement
https://docs.unrealengine.com/latest/INT/Gameplay/Networking/CharacterMovementComponent/index.html#advancedtopic:addingnewmovementabilitiestocharactermovement

Custom Character Movement Component
https://wiki.unrealengine.com/Custom_Character_Movement_Component

Dedicated Server 的 Movement 优化

如果仅仅为了性能，不希望服务端实时修正客户端坐标，以客户端发过来的坐标为准，可以开启以下选项：

[/Script/Engine.GameNetworkManager]
 MAXPOSITIONERRORSQUARED=625
 ClientAuthorativePosition=true

但是这么做会被外挂 hack

参考自：How am I able to Replicate movement when using “AddMovement Input”, but not AddLocalTransform?
https://answers.unrealengine.com/questions/26116/able-to-replicate-movement-when-using-addmovement.html

Console Commands

int32 NetShowCorrections = 0;
FAutoConsoleVariableRef CVarNetShowCorrections(
    TEXT("p.NetShowCorrections"),
    NetShowCorrections,
    TEXT("Whether to draw client position corrections (red is incorrect, green is corrected).\n")
    TEXT("0: Disable, 1: Enable"),
    ECVF_Cheat);

float NetCorrectionLifetime = 4.f;
FAutoConsoleVariableRef CVarNetCorrectionLifetime(
    TEXT("p.NetCorrectionLifetime"),
    NetCorrectionLifetime,
    TEXT("How long a visualized network correction persists.\n")
    TEXT("Time in seconds each visualized network correction persists."),
    ECVF_Cheat);

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